/* Melody Hub Platform - Component Styles */

/* ==================== Loading Spinner ==================== */
.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ==================== Modal ==================== */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 10, 31, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    width: 90%;
    max-width: 520px;
    max-height: 90vh;
    overflow: auto;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.375rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    color: var(--gray-500);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--gray-100);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    background: var(--gray-50);
}

/* ==================== Tabs ==================== */
.tabs {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--gray-100);
    padding: var(--spacing-xs);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
}

.tab {
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
    color: var(--gray-500);
    border: none;
    background: none;
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.tab:hover {
    color: var(--gray-700);
}

.tab.active {
    background: var(--white);
    color: var(--gray-900);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-base) ease;
}

/* ==================== Dropdown ==================== */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: var(--spacing-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 100;
    border: 1px solid var(--gray-100);
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-700);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary);
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    color: var(--gray-400);
}

.dropdown-item:hover i {
    color: var(--primary);
}

.dropdown-divider {
    height: 1px;
    background: var(--gray-100);
    margin: var(--spacing-sm) 0;
}

/* ==================== Tooltip ==================== */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-900);
    color: var(--white);
    font-size: 0.8125rem;
    white-space: nowrap;
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
    font-weight: 500;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* ==================== Progress Bar ==================== */
.progress {
    height: 8px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-start), var(--accent-pink));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow) ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-labeled {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.progress-labeled .progress {
    flex: 1;
}

.progress-label {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--gray-700);
    min-width: 48px;
    text-align: right;
}

/* ==================== Avatar ==================== */
.avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm { width: 36px; height: 36px; font-size: 0.8125rem; }
.avatar-lg { width: 64px; height: 64px; font-size: 1.5rem; }
.avatar-xl { width: 96px; height: 96px; font-size: 2rem; }

.avatar-group {
    display: flex;
}

.avatar-group .avatar {
    margin-left: -12px;
    border: 3px solid var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

/* ==================== Rating Stars ==================== */
.rating {
    display: flex;
    gap: 2px;
}

.rating-star {
    color: var(--gray-200);
    font-size: 1rem;
    transition: color var(--transition-fast);
}

.rating-star.filled {
    color: var(--accent-yellow);
}

.rating-star.half {
    position: relative;
}

.rating-star.half::before {
    content: '★';
    position: absolute;
    left: 0;
    width: 50%;
    overflow: hidden;
    color: var(--accent-yellow);
}

.rating-interactive .rating-star {
    cursor: pointer;
}

.rating-interactive .rating-star:hover {
    color: var(--accent-yellow);
    transform: scale(1.1);
}

/* ==================== Empty State ==================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-xl);
}

.empty-state-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-xl);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary);
}

.empty-state-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.empty-state-text {
    color: var(--gray-500);
    margin-bottom: var(--spacing-xl);
    font-size: 1.0625rem;
}

/* ==================== Search ==================== */
.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    padding-left: 52px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--white);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1rem;
}

/* ==================== Table ==================== */
.table-container {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-100);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
}

.table th {
    background: var(--gray-50);
    font-weight: 700;
    color: var(--gray-600);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr {
    border-bottom: 1px solid var(--gray-100);
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: rgba(139, 92, 246, 0.02);
}

.table tbody tr:last-child {
    border-bottom: none;
}

/* ==================== Pagination ==================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-2xl);
}

.pagination-item {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    color: var(--gray-600);
    font-weight: 600;
    transition: all var(--transition-fast);
    background: var(--white);
    border: 1px solid var(--gray-200);
}

.pagination-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
    border-color: var(--gray-300);
}

.pagination-item.active {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.pagination-item.disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* ==================== Tag Input ==================== */
.tag-input {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    min-height: 54px;
    cursor: text;
    transition: all var(--transition-fast);
    background: var(--white);
}

.tag-input:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.tag-input input {
    border: none;
    outline: none;
    flex: 1;
    min-width: 140px;
    padding: var(--spacing-sm);
    font-size: 1rem;
    font-family: var(--font-body);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.tag-remove {
    width: 18px;
    height: 18px;
    border: none;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--white);
    transition: background var(--transition-fast);
}

.tag-remove:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* ==================== Time Slots ==================== */
.time-slots {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.time-slot {
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 600;
    background: var(--white);
}

.time-slot:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
}

.time-slot.selected {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    border-color: transparent;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.time-slot.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ==================== Feature Cards ==================== */
.feature-card {
    padding: var(--spacing-2xl);
    text-align: center;
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.feature-icon.purple { background: linear-gradient(135deg, var(--primary-start), var(--accent-pink)); color: var(--white); }
.feature-icon.cyan { background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green)); color: var(--white); }
.feature-icon.orange { background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow)); color: var(--white); }
.feature-icon.pink { background: linear-gradient(135deg, var(--accent-pink), #F43F5E); color: var(--white); }

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-text {
    color: var(--gray-500);
    font-size: 1rem;
    line-height: 1.7;
}

/* ==================== Instrument Grid ==================== */
.instrument-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .instrument-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .instrument-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .instrument-grid { grid-template-columns: 1fr; }
}

.instrument-card {
    background: var(--white);
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    display: block;
}

.instrument-card:hover {
    border-color: var(--primary);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.15);
}

.instrument-card.selected {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.05));
}

.instrument-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.instrument-name {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-xs);
}

.instrument-count {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ==================== Lesson Card ==================== */
.lesson-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    display: flex;
    border: 1px solid var(--gray-100);
}

.lesson-card-date {
    width: 90px;
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.lesson-card-day {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.lesson-card-month {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.9;
}

.lesson-card-content {
    flex: 1;
    padding: var(--spacing-lg);
}

.lesson-card-time {
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
    font-size: 1.0625rem;
}

.lesson-card-teacher {
    color: var(--gray-500);
    font-size: 0.9375rem;
}

.lesson-card-instrument {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gray-100);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--gray-600);
    font-weight: 500;
}

.lesson-card-actions {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
}

/* ==================== Learning Plan Card ==================== */
.plan-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-100);
}

.plan-card-header {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-cyan));
    color: var(--white);
    padding: var(--spacing-xl);
}

.plan-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.plan-card-meta {
    font-size: 0.9375rem;
    opacity: 0.9;
}

.plan-card-body {
    padding: var(--spacing-xl);
}

.plan-card-progress {
    margin-bottom: var(--spacing-lg);
}

.plan-card-week {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--gray-100);
}

.plan-card-week:last-child {
    border-bottom: none;
}

.plan-card-week-number {
    width: 36px;
    height: 36px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--gray-500);
    flex-shrink: 0;
}

.plan-card-week-number.current {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    box-shadow: 0 4px 10px rgba(139, 92, 246, 0.3);
}

.plan-card-week-number.completed {
    background: var(--success);
    color: var(--white);
}

.plan-card-week-focus {
    flex: 1;
    font-size: 1rem;
}

/* ==================== Toast Notifications ==================== */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    min-width: 340px;
    max-width: 420px;
    animation: toastIn var(--transition-base) ease;
    border: 1px solid var(--gray-100);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.toast-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast.success .toast-icon { background: linear-gradient(135deg, var(--success), #059669); color: var(--white); }
.toast.error .toast-icon { background: linear-gradient(135deg, var(--danger), #DC2626); color: var(--white); }
.toast.warning .toast-icon { background: linear-gradient(135deg, var(--warning), #D97706); color: var(--white); }
.toast.info .toast-icon { background: linear-gradient(135deg, var(--info), #0284C7); color: var(--white); }

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: 0.9375rem;
    color: var(--gray-500);
    line-height: 1.6;
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-400);
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--gray-600);
}

/* ==================== Calendar ==================== */
.calendar {
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-100);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
}

.calendar-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.calendar-nav {
    display: flex;
    gap: var(--spacing-sm);
}

.calendar-nav button {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--white);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.calendar-nav button:hover {
    background: rgba(255, 255, 255, 0.3);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-day-name {
    padding: var(--spacing-md);
    text-align: center;
    font-weight: 700;
    color: var(--gray-500);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--gray-50);
}

.calendar-day {
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid var(--gray-100);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.calendar-day:hover {
    background: var(--gray-50);
}

.calendar-day.today {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    font-weight: 700;
}

.calendar-day.selected {
    background: var(--primary);
    color: var(--white);
}

.calendar-day.other-month {
    color: var(--gray-300);
}

.calendar-day.has-event::after {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: var(--radius-full);
    margin: var(--spacing-xs) auto 0;
}

/* ==================== Cookie Consent Banner ==================== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--gray-200);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cookie-banner-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.cookie-text {
    flex: 1;
    min-width: 300px;
}

.cookie-text h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    color: var(--gray-900);
}

.cookie-text h4 i {
    color: var(--accent-gold);
}

.cookie-text p {
    color: var(--gray-600);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
}

.cookie-text a {
    color: var(--primary);
    text-decoration: underline;
}

.cookie-text a:hover {
    color: var(--primary-dark);
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Cookie Settings Modal Override */
#cookie-settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
}

/* Cookie Settings Modal Specific Styles */
.cookie-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
}

.cookie-modal-overlay.active {
    display: block;
}

.cookie-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 10, 31, 0.7);
    backdrop-filter: blur(8px);
}

.cookie-modal-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 10% auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#cookie-settings-modal .modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 10, 31, 0.7);
    backdrop-filter: blur(8px);
}

/* Additional feature icon colors */
.feature-icon.coral { 
    background: linear-gradient(135deg, var(--accent-coral, #FF6B6B), #e74c3c); 
    color: var(--white); 
}

.feature-icon.gold { 
    background: linear-gradient(135deg, var(--accent-gold, #F59E0B), #f39c12); 
    color: var(--white); 
}

.feature-icon.teal { 
    background: linear-gradient(135deg, var(--accent-teal, #14B8A6), #16a085); 
    color: var(--white); 
}

/* Responsive Cookie Banner */
@media (max-width: 768px) {
    .cookie-banner-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-buttons {
        width: 100%;
        justify-content: center;
    }
    
    .cookie-buttons .btn {
        flex: 1;
        min-width: 120px;
    }
}

/* ==================== Collaborative AI Wizard ==================== */
.collab-ai-wizard {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: 80vh;
    min-height: 400px;
}

.collab-ai-header {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.collab-ai-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.collab-ai-title i {
    font-size: 1.25rem;
}

.collab-ai-close {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.collab-ai-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.collab-ai-mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-100);
}

.collab-ai-mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    background: var(--white);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.collab-ai-mode-btn i {
    font-size: 1.25rem;
    color: var(--gray-400);
}

.collab-ai-mode-btn span {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9375rem;
}

.collab-ai-mode-btn small {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.collab-ai-mode-btn:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
}

.collab-ai-mode-btn.active {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
}

.collab-ai-mode-btn.active i {
    color: var(--primary);
}

.collab-ai-mode-btn.active span {
    color: var(--primary);
}

.collab-ai-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.collab-ai-conversation {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.collab-ai-message {
    display: flex;
    gap: var(--spacing-md);
    max-width: 90%;
    animation: collabFadeIn 0.3s ease;
}

@keyframes collabFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.collab-ai-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.collab-ai-message-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9375rem;
}

.collab-ai-message.assistant .collab-ai-message-avatar {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
}

.collab-ai-message.user .collab-ai-message-avatar {
    background: var(--gray-200);
    color: var(--gray-600);
}

.collab-ai-message-content {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.collab-ai-message.assistant .collab-ai-message-content {
    background: var(--gray-100);
    color: var(--gray-800);
    border-bottom-left-radius: var(--radius-sm);
}

.collab-ai-message.user .collab-ai-message-content {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    border-bottom-right-radius: var(--radius-sm);
}

.collab-ai-input-area {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.collab-ai-choices {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.collab-ai-choice-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    background: var(--white);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.collab-ai-choice-btn:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    color: var(--primary);
}

.collab-ai-choice-btn.collab-ai-custom-btn {
    border-style: dashed;
    color: var(--gray-500);
}

.collab-ai-choice-btn.collab-ai-custom-btn:hover {
    color: var(--primary);
}

.collab-ai-custom-input {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.collab-ai-custom-input input {
    flex: 1;
}

.collab-ai-text-input {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.collab-ai-text-input textarea {
    flex: 1;
    resize: none;
}

.collab-ai-text-input button {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.collab-ai-footer {
    padding: var(--spacing-md) var(--spacing-xl);
    border-top: 1px solid var(--gray-100);
    background: var(--white);
}

.collab-ai-progress {
    height: 4px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.collab-ai-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-start), var(--accent-pink));
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
    width: 0%;
}

.collab-ai-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* Loading animation */
.collab-ai-typing {
    display: flex;
    gap: 4px;
    padding: var(--spacing-md) var(--spacing-lg);
}

.collab-ai-typing span {
    width: 8px;
    height: 8px;
    background: var(--gray-400);
    border-radius: var(--radius-full);
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.collab-ai-typing span:nth-child(1) { animation-delay: -0.32s; }
.collab-ai-typing span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* Result display */
.collab-ai-result {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-md);
    animation: collabFadeIn 0.3s ease;
}

.collab-ai-result-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--success);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.collab-ai-result-header i {
    font-size: 1.25rem;
}

.collab-ai-result-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--gray-200);
    max-height: 200px;
    overflow-y: auto;
}

.collab-ai-result-content p {
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.7;
}

.collab-ai-result-content ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.collab-ai-result-content li {
    margin-bottom: var(--spacing-xs);
}

.collab-ai-result-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* Error display */
.collab-ai-error {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    animation: collabFadeIn 0.3s ease;
}

/* Resume dialog */
.collab-ai-resume-dialog {
    padding: var(--spacing-lg);
}

.collab-ai-resume-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Preview styles */
.preview-learning-plan,
.preview-lesson-prep,
.preview-warmup,
.preview-tips {
    font-size: 0.9375rem;
}

.preview-overview {
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.preview-weeks {
    border-left: 3px solid var(--primary);
    padding-left: var(--spacing-md);
}

.preview-week {
    margin-bottom: var(--spacing-md);
}

.preview-week:last-child {
    margin-bottom: 0;
}

.preview-more {
    color: var(--gray-500);
    font-style: italic;
    margin-top: var(--spacing-sm);
}

.preview-section {
    margin-bottom: var(--spacing-sm);
}

/* Modal wrapper for wizard */
.collab-ai-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 10, 31, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.collab-ai-modal.active {
    opacity: 1;
    visibility: visible;
}

.collab-ai-modal .collab-ai-wizard {
    width: 100%;
    max-width: 600px;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.collab-ai-modal.active .collab-ai-wizard {
    transform: scale(1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .collab-ai-mode-selector {
        grid-template-columns: 1fr;
    }
    
    .collab-ai-modal {
        padding: var(--spacing-md);
    }
    
    .collab-ai-wizard {
        max-height: 90vh;
    }
    
    .collab-ai-choices {
        flex-direction: column;
    }
    
    .collab-ai-choice-btn {
        width: 100%;
        text-align: center;
    }
}

/* ==================== Beta Feedback Button & Modal ==================== */
.beta-feedback-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 900;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(
        135deg,
        rgba(13, 148, 136, 0.18) 0%,
        rgba(34, 211, 238, 0.12) 100%
    );
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-primary);
    border: 1px solid rgba(13, 148, 136, 0.3);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    box-shadow:
        0 4px 16px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.beta-feedback-btn:hover {
    transform: translateY(-2px) scale(1.02);
    background: linear-gradient(
        135deg,
        rgba(13, 148, 136, 0.28) 0%,
        rgba(34, 211, 238, 0.2) 100%
    );
    border-color: rgba(13, 148, 136, 0.45);
    box-shadow:
        0 8px 24px rgba(13, 148, 136, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.beta-feedback-btn:active {
    transform: translateY(0) scale(0.98);
}

.beta-feedback-btn i {
    font-size: 1.125rem;
}

.scroll-top-btn {
    position: fixed;
    right: 24px;
    bottom: 156px;
    z-index: 899;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--glass-bg), rgba(51, 65, 85, 0.72));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-base);
    opacity: 0;
    pointer-events: none;
}

.scroll-top-btn.visible {
    opacity: 1;
    pointer-events: auto;
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    background: linear-gradient(135deg, var(--primary), var(--accent-petrol));
    color: var(--white);
    border-color: transparent;
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
}

/* Feedback Modal Specific Styles */
.feedback-modal {
    max-width: 680px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}

.feedback-modal .modal-header {
    flex-shrink: 0;
}

.feedback-modal .modal-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 300px;
    max-height: calc(85vh - 160px); /* Account for header and footer */
}

.feedback-modal .modal-footer {
    flex-shrink: 0;
}

.feedback-intro {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(var(--primary-rgb, 99, 102, 241), 0.08) 0%, rgba(var(--primary-rgb, 99, 102, 241), 0.02) 100%);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--primary);
}

.feedback-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.feedback-form .form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.feedback-form .form-hint {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-top: var(--spacing-xs);
    display: block;
}

.feedback-form textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* Success State */
.feedback-success {
    text-align: center;
    padding: var(--spacing-xl);
}

.feedback-success .success-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: successPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feedback-success .success-icon i {
    font-size: 2rem;
    color: var(--white);
}

.feedback-success h4 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.feedback-success p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.feedback-issue-info {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 500;
}

@keyframes successPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Error State */
.feedback-error {
    padding: var(--spacing-lg);
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    margin-top: var(--spacing-md);
}

.feedback-error .error-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    background: #ef4444;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feedback-error .error-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.feedback-error p {
    color: #dc2626;
    text-align: center;
    margin: 0;
    font-weight: 500;
}

.feedback-error small {
    color: #b91c1c;
    font-weight: 400;
}

/* Mobile Responsive */
@media (max-width: 640px) {
    .beta-feedback-btn {
        bottom: 16px;
        right: 16px;
        padding: var(--spacing-md);
    }
    
    .beta-feedback-label {
        display: none;
    }
    
    .beta-feedback-btn i {
        font-size: 1.25rem;
    }

    .scroll-top-btn {
        right: 16px;
        bottom: 136px;
        width: 44px;
        height: 44px;
    }
    
    .feedback-modal {
        width: 95%;
        max-width: 95%;
        max-height: 90vh;
    }
    
    .feedback-modal .modal-body {
        padding: var(--spacing-md);
        min-height: 250px;
        max-height: calc(90vh - 140px);
    }
}

/* Tablet responsive for feedback modal */
@media (min-width: 641px) and (max-width: 768px) {
    .feedback-modal {
        max-width: 600px;
        max-height: 85vh;
    }
    
    .feedback-modal .modal-body {
        max-height: calc(85vh - 150px);
    }
}

/* ==================== Screenshot Preview Styles ==================== */
.screenshot-preview-container {
    margin-top: var(--spacing-md);
    border: 2px solid var(--primary-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-50);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 500px;
    }
}

.screenshot-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(99, 102, 241, 0.1));
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.screenshot-preview-header span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.screenshot-preview-header i {
    color: var(--primary);
}

.screenshot-preview-image {
    padding: var(--spacing-md);
    text-align: center;
    background: var(--white);
}

.screenshot-preview-image img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    object-fit: contain;
}

.screenshot-processing {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.screenshot-processing i {
    font-size: 1rem;
}

.screenshot-analysis {
    padding: var(--spacing-md);
    background: var(--white);
    border-top: 1px solid var(--gray-200);
}

.screenshot-analysis-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

#screenshot-analysis-text {
    font-size: 0.875rem;
    color: var(--gray-700);
    line-height: 1.6;
    white-space: pre-wrap;
    max-height: 150px;
    overflow-y: auto;
}

/* AI Mode Screenshot Hint */
.ai-screenshot-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--amber-600);
    background: rgba(245, 158, 11, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--amber-500);
}

.ai-screenshot-hint i {
    color: var(--amber-500);
}

/* Mobile adjustments for screenshot preview */
@media (max-width: 640px) {
    .screenshot-preview-image img {
        max-height: 150px;
    }
    
    #screenshot-analysis-text {
        max-height: 100px;
    }
}

/* ==================== AI-Assisted Feedback Mode ==================== */
.feedback-mode-selection {
    text-align: center;
}

.feedback-mode-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feedback-mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    border: 2px solid var(--gray-200);
    background: var(--white);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.feedback-mode-btn i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.feedback-mode-btn .mode-title {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1rem;
}

.feedback-mode-btn .mode-desc {
    font-size: 0.8125rem;
    color: var(--gray-500);
    line-height: 1.4;
}

.feedback-mode-btn:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.15);
}

/* AI Feedback Header */
.ai-feedback-header,
.simple-feedback-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-100);
}

.ai-progress {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* AI Conversation Area */
.ai-conversation {
    min-height: 180px;
    max-height: none; /* Let it grow with content, parent handles overflow */
    overflow-y: visible;
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.ai-message {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    animation: aiFadeIn 0.3s ease;
}

@keyframes aiFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-message.assistant {
    flex-direction: row;
}

.ai-message.user {
    flex-direction: row-reverse;
}

.ai-message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.875rem;
}

.ai-message.assistant .ai-message-avatar {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
}

.ai-message.user .ai-message-avatar {
    background: var(--gray-200);
    color: var(--gray-600);
}

.ai-message-content {
    max-width: 80%;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.ai-message.assistant .ai-message-content {
    background: var(--white);
    color: var(--gray-800);
    border-bottom-left-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.ai-message.user .ai-message-content {
    background: linear-gradient(135deg, var(--primary-start), var(--accent-pink));
    color: var(--white);
    border-bottom-right-radius: var(--radius-sm);
}

/* AI Choices */
.ai-choices {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.ai-choice-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    background: var(--white);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.ai-choice-btn:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    color: var(--primary);
}

.ai-choice-btn.custom-choice {
    border-style: dashed;
    color: var(--gray-500);
}

.ai-choice-btn.custom-choice:hover {
    color: var(--primary);
}

.ai-choice-btn.preselected {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.08);
    color: var(--success);
    position: relative;
}

.ai-choice-btn.preselected small {
    font-size: 0.7rem;
    opacity: 0.8;
    display: block;
    margin-top: 2px;
}

.ai-choice-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* AI Description Input */
.ai-description-input {
    margin-top: var(--spacing-lg);
}

.ai-description-input textarea {
    resize: vertical;
    min-height: 100px;
}

/* AI Loading */
.ai-loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    color: var(--gray-600);
    font-weight: 500;
}

.ai-loading i {
    font-size: 1.25rem;
    color: var(--primary);
}

/* AI Feedback Preview */
.ai-feedback-preview {
    margin-top: var(--spacing-lg);
}

.ai-feedback-preview h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--success);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.ai-feedback-preview h4 i {
    font-size: 1.125rem;
}

.ai-preview-content {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-200);
}

.ai-preview-content h5 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
}

.ai-preview-content .preview-section {
    margin-bottom: var(--spacing-md);
}

.ai-preview-content .preview-label {
    font-weight: 600;
    color: var(--gray-600);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.ai-preview-content .preview-text {
    color: var(--gray-800);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.ai-preview-content .preview-steps {
    list-style: decimal;
    padding-left: var(--spacing-lg);
    margin: var(--spacing-sm) 0;
}

.ai-preview-content .preview-steps li {
    margin-bottom: var(--spacing-xs);
    color: var(--gray-700);
}

/* Custom input for choices */
.ai-custom-input-container {
    margin-top: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.ai-custom-input-container input {
    flex: 1;
    min-width: 200px;
}

.ai-custom-input-container .btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.ai-custom-input-container .btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
}

.ai-custom-submit {
    background: var(--primary);
    border-color: var(--primary);
}

.ai-custom-submit:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* Mobile Responsive for AI Feedback */
@media (max-width: 640px) {
    .feedback-mode-buttons {
        grid-template-columns: 1fr;
    }
    
    .feedback-mode-btn {
        padding: var(--spacing-lg);
    }
    
    .ai-choices {
        flex-direction: column;
    }
    
    .ai-choice-btn {
        width: 100%;
        text-align: center;
    }
    
    .ai-message-content {
        max-width: 85%;
    }
}

/* ==================== Description-First Feedback Flow ==================== */
.ai-initial-description {
    margin-bottom: var(--spacing-lg);
}

.ai-description-input-area {
    margin-top: var(--spacing-md);
}

.ai-description-input-area textarea {
    resize: vertical;
    min-height: 80px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast);
}

.ai-description-input-area textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

/* Classification Result Card */
.classification-card {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.08) 0%, rgba(236, 72, 153, 0.05) 100%);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.classification-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.classification-header i {
    color: var(--primary);
}

.classification-type {
    margin-bottom: var(--spacing-md);
}

.type-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 1rem;
}

.type-badge.type-bug {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    border: 1px solid #fca5a5;
}

.type-badge.type-feature {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #2563eb;
    border: 1px solid #93c5fd;
}

.type-badge.type-improvement {
    background: linear-gradient(135deg, #f3e8ff 0%, #e9d5ff 100%);
    color: #7c3aed;
    border: 1px solid #c4b5fd;
}

.type-badge.type-usability {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #d97706;
    border: 1px solid #fcd34d;
}

.classification-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.classification-hint {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

/* Type Change Options */
.type-change-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(139, 92, 246, 0.15);
    animation: fadeIn 0.3s ease;
}

.type-option {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--white);
}

.type-option:hover {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.05);
    transform: translateY(-1px);
}

.type-option[data-type="bug"]:hover {
    border-color: #dc2626;
    background: rgba(220, 38, 38, 0.05);
}

.type-option[data-type="feature"]:hover {
    border-color: #2563eb;
    background: rgba(37, 99, 235, 0.05);
}

.type-option[data-type="improvement"]:hover {
    border-color: #7c3aed;
    background: rgba(124, 58, 237, 0.05);
}

.type-option[data-type="usability"]:hover {
    border-color: #d97706;
    background: rgba(217, 119, 6, 0.05);
}

/* Preview Edit Section */
.preview-edit-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius-lg);
    animation: fadeIn 0.3s ease;
}

.preview-edit-section .form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.preview-edit-section input,
.preview-edit-section textarea {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
}

.preview-edit-section input:focus,
.preview-edit-section textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

/* Animation for fade in */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Mobile responsive for description-first flow */
@media (max-width: 640px) {
    .classification-card {
        padding: var(--spacing-md);
    }
    
    .type-change-options {
        flex-direction: column;
    }
    
    .type-option {
        width: 100%;
        text-align: center;
    }
    
    .classification-actions {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ==================== Learning Plan Create Page ==================== */
/* Fix for Issue #23 - Mobile UI overflow on Create Learning Plan page */

.learning-plan-card {
    max-width: 700px;
    margin: 0 auto;
    margin-bottom: var(--spacing-xl);
}

.learning-plan-card-body {
    padding: var(--spacing-xl);
}

.learning-plan-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.learning-plan-mode-grid {
    gap: var(--spacing-lg);
}

/* Mode Cards */
.mode-card {
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mode-card-primary {
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.05));
}

.mode-card-secondary {
    border: 2px solid var(--gray-200);
}

.mode-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.mode-card-title {
    margin-bottom: var(--spacing-sm);
}

.mode-card-desc {
    color: var(--gray-600);
    font-size: 0.9375rem;
    margin: 0;
}

/* Duration Grid */
.duration-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.duration-card {
    padding: var(--spacing-md);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
}

.duration-card:hover {
    transform: translateY(-2px);
}

.duration-card-selected {
    border-color: var(--primary);
    background: rgba(107, 70, 193, 0.05);
}

.duration-radio {
    display: none;
}

/* Mobile Responsive Styles for Learning Plan */
@media (max-width: 768px) {
    .learning-plan-card {
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
        border-radius: var(--radius-lg);
    }
    
    .learning-plan-card-body {
        padding: var(--spacing-md);
    }
    
    .learning-plan-title {
        font-size: 1.125rem;
    }
    
    .learning-plan-mode-grid {
        gap: var(--spacing-md);
    }
    
    .mode-card {
        padding: var(--spacing-md);
    }
    
    .mode-card-icon {
        font-size: 2rem;
    }
    
    .mode-card-title {
        font-size: 1rem;
    }
    
    .mode-card-desc {
        font-size: 0.875rem;
    }
    
    .duration-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .duration-card {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .learning-plan-card {
        border-radius: var(--radius-md);
    }
    
    .learning-plan-card-body {
        padding: var(--spacing-sm);
    }
    
    .learning-plan-title {
        font-size: 1rem;
        margin-bottom: var(--spacing-md);
    }
    
    .learning-plan-mode-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .mode-card {
        padding: var(--spacing-md);
    }
    
    .mode-card-icon {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .mode-card-title {
        font-size: 0.9375rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .mode-card-desc {
        font-size: 0.8125rem;
        line-height: 1.4;
    }
    
    .duration-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .duration-card {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    /* Form buttons responsive */
    .learning-plan-card .flex.gap-2 {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .learning-plan-card .flex.gap-2 .btn {
        width: 100%;
        flex: none;
    }
    
    /* Loading overlay responsive */
    #loading-overlay .alert {
        padding: var(--spacing-md);
    }
    
    #loading-overlay strong {
        font-size: 0.9375rem;
    }
    
    #loading-overlay p {
        font-size: 0.8125rem;
    }
}

/* ==================== Navigation Messages Badge ==================== */
.nav-messages-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-messages-badge {
    position: absolute;
    top: -6px;
    right: -10px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(135deg, var(--accent-coral, #FF6B6B), #e74c3c);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 2s ease-in-out infinite;
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.4);
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Sidebar Messages Badge */
.sidebar-nav-link {
    position: relative;
}

.sidebar-messages-badge {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(135deg, var(--accent-coral, #FF6B6B), #e74c3c);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 2s ease-in-out infinite;
}

/* ==================== Floating Messages Button ==================== */
.floating-messages-btn {
    position: fixed;
    bottom: 90px;
    right: 24px;
    z-index: 899;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4),
                0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-base);
    text-decoration: none;
}

.floating-messages-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 28px rgba(139, 92, 246, 0.5),
                0 4px 12px rgba(0, 0, 0, 0.2);
}

.floating-messages-btn:active {
    transform: translateY(0) scale(0.98);
}

.floating-messages-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--white);
    background: linear-gradient(135deg, var(--accent-coral, #FF6B6B), #e74c3c);
    border-radius: var(--radius-full);
    display: none;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--white);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.5);
}

/* Show floating button only on mobile for authenticated users */
@media (max-width: 768px) {
    .floating-messages-btn.authenticated {
        display: flex;
    }
}

/* ==================== Recent Messages Widget ==================== */
.recent-messages-widget {
    background: var(--white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-100);
}

.recent-messages-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-100);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.03));
}

.recent-messages-header h3 {
    font-size: 1rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.recent-messages-header h3 i {
    color: var(--primary);
}

.recent-message-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-100);
    text-decoration: none;
    color: inherit;
    transition: background 0.2s;
}

.recent-message-item:hover {
    background: var(--gray-50);
}

.recent-message-item:last-child {
    border-bottom: none;
}

.recent-message-item.unread {
    background: rgba(139, 92, 246, 0.05);
}

.recent-message-item.unread:hover {
    background: rgba(139, 92, 246, 0.08);
}

.recent-message-content {
    flex: 1;
    min-width: 0;
}

.recent-message-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 2px;
}

.recent-message-sender {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--gray-900);
}

.recent-message-time {
    font-size: 0.75rem;
    color: var(--gray-500);
    flex-shrink: 0;
}

.recent-message-preview {
    margin: 0;
    font-size: 0.875rem;
    color: var(--gray-600);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recent-message-item.unread .recent-message-sender {
    color: var(--primary);
}

.recent-message-item.unread .recent-message-preview {
    font-weight: 500;
    color: var(--gray-800);
}

.recent-messages-empty {
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--gray-500);
}

.recent-messages-empty i {
    font-size: 2rem;
    color: var(--gray-300);
    margin-bottom: var(--spacing-sm);
    display: block;
}

/* ==================== Message Teacher Button ==================== */
.message-teacher-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--white);
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.message-teacher-btn:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.message-teacher-btn i {
    font-size: 1rem;
}

/* Inline message button variant */
.message-btn-inline {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    border-width: 1px;
}