.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.4;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible,
.category-chip:focus-visible,
.star-btn:focus-visible,
.task-check:focus-visible,
.active-filter:focus-visible {
    outline: 2px solid var(--color-primary-400);
    outline-offset: 2px;
}
.file-upload:focus-within {
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(42, 82, 212, 0.1);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-500) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.25);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-primary-600) 100%);
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.3);
    color: white;
}

.btn--teal {
    background: linear-gradient(135deg, var(--color-teal-600) 0%, var(--color-teal-500) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
}

.btn--teal:hover {
    background: linear-gradient(135deg, var(--color-teal-700) 0%, var(--color-teal-600) 100%);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
    color: white;
}

.btn--outline {
    background: white;
    color: var(--color-gray-700);
    border: 1.5px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

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

.btn--danger {
    background: var(--color-error-500);
    color: white;
}

.btn--danger:hover {
    background: var(--color-error-600);
    color: white;
}

.btn--lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

.btn--sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn--ghost {
    background: transparent;
    color: var(--color-gray-600);
    padding: var(--space-2) var(--space-3);
}

.btn--ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    transform: none;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.card:hover {
    border-color: var(--color-gray-200);
}

.card--link:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
    border-color: var(--color-gray-200);
}

.card--link {
    position: relative;
    cursor: pointer;
}

.card__overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    text-decoration: none;
}

.card__image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
}

.card__image-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    font-weight: 700;
    color: white;
}

.card__body {
    padding: var(--space-5);
}

.card__header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
}

.star-input {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.card__meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
}

.card__title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.card__title a {
    color: inherit;
    text-decoration: none;
}

.card__title a:hover {
    color: var(--color-primary-500);
}

.card__desc {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-100);
}

.card__price {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-primary-600);
}

.card__price--free {
    color: var(--color-teal-600);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    line-height: 1.4;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.badge--blue {
    background: var(--color-primary-50);
    color: var(--color-primary-600);
}

.badge--teal {
    background: var(--color-teal-50);
    color: var(--color-teal-700);
}

.badge--green {
    background: #ecfdf5;
    color: var(--color-success-600);
}

.badge--orange {
    background: #fff7ed;
    color: var(--color-warning-600);
}

.badge--red {
    background: #fef2f2;
    color: var(--color-error-600);
}

.badge--gray {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* Stars */
.star { font-size: var(--text-lg); }
.star--full { color: #fbbf24; }
.star--half { color: #fbbf24; opacity: 0.6; }
.star--empty { color: var(--color-gray-300); }

.star-btn {
    background: none;
    border: none;
    font-size: var(--text-2xl);
    color: var(--color-gray-300);
    cursor: pointer;
    padding: 0 2px;
    transition: color var(--transition-fast);
}

.star-btn:hover,
.star-btn--active {
    color: #fbbf24;
}

.rating-display {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.rating-display__value {
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--color-gray-800);
}

.rating-display__count {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-gray-800);
    background: white;
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary-400);
    box-shadow: 0 0 0 3px rgba(42, 82, 212, 0.1);
}

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

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary-500);
}

/* Avatar */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-teal-500));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.avatar--sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar--lg { width: 56px; height: 56px; font-size: var(--text-xl); }

/* Grid */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid--2,
    .grid--3,
    .grid--4 {
        grid-template-columns: 1fr;
    }
}

/* Category chips */
.category-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
}

.category-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: white;
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
}

.category-chip:hover {
    border-color: var(--color-primary-300);
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.category-chip--active {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
    color: var(--color-primary-600);
}

.category-chip svg {
    opacity: 0.7;
}

/* Instructor badge */
.instructor-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-gray-600);
}

.instructor-tag__avatar {
    width: 24px;
    height: 24px;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--color-gray-500);
}

.empty-state__icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-state__title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: var(--space-2);
}

.empty-state__desc {
    font-size: var(--text-base);
    color: var(--color-gray-500);
    max-width: 400px;
    margin: 0 auto;
}

/* Review card */
.review {
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-gray-100);
}

.review:last-child {
    border-bottom: none;
}

.review__header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.review__author {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-gray-800);
}

.review__date {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.review__title {
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.review__body {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* Comment */
.comment {
    padding: var(--space-4);
    margin-bottom: var(--space-3);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.comment__header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.comment__author {
    font-weight: 600;
    font-size: var(--text-sm);
}

.comment__date {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.comment__body {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    line-height: 1.6;
}

.comment__replies {
    margin-top: var(--space-3);
    margin-left: var(--space-6);
}

/* Search bar */
.search-bar {
    display: flex;
    gap: var(--space-3);
    background: white;
    padding: var(--space-2);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1.5px solid var(--color-gray-100);
}

.search-bar__input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: none;
    outline: none;
    font-size: var(--text-base);
    font-family: var(--font-sans);
    background: transparent;
}

.search-bar__btn {
    flex-shrink: 0;
}

/* Filter bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    padding: var(--space-4) 0;
}

.filter-bar__select {
    padding: var(--space-2) var(--space-4);
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    background: white;
    color: var(--color-gray-700);
    cursor: pointer;
    outline: none;
}

.filter-bar__select:focus {
    border-color: var(--color-primary-400);
}

.filter-bar__count {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-left: auto;
}

.active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: var(--space-2);
}

.active-filter {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    border: 1px solid var(--color-primary-200);
    border-radius: var(--radius-full, 9999px);
    font-size: var(--text-xs);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.active-filter:hover {
    background: var(--color-primary-100);
    text-decoration: none;
}

.active-filter--clear {
    background: transparent;
    border-color: var(--color-gray-300);
    color: var(--color-gray-500);
}

.active-filter--clear:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.filter-bar__select--active {
    border-color: var(--color-primary-400);
    background: var(--color-primary-50);
}

/* Browse layout (booking.com style) */
.browse-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--space-8);
    align-items: start;
}

.filter-sidebar {
    position: sticky;
    top: 80px;
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.filter-sidebar__close {
    display: none;
}

.filter-sidebar__section {
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
}

.filter-sidebar__section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.filter-sidebar__title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 0 0 var(--space-3);
}

.filter-sidebar__check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) 0;
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    cursor: pointer;
}

.filter-sidebar__check input {
    accent-color: var(--color-teal);
}

.filter-sidebar__clear {
    display: block;
    margin-top: var(--space-2);
    padding: 0;
    background: none;
    border: none;
    font-size: var(--text-xs);
    color: var(--color-teal);
    cursor: pointer;
    text-decoration: underline;
}

.browse-results__header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-gray-100);
}

.browse-results__header .filter-bar__count {
    margin-left: 0;
}

.browse-results__header .view-toggle {
    margin-left: auto;
}

.filter-toggle-mobile {
    display: none;
}

.form-input--sm,
.form-select--sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

@media (max-width: 900px) {
    .browse-layout {
        grid-template-columns: 1fr;
    }

    .filter-sidebar {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 100;
        border-radius: 0;
        max-height: 100vh;
        padding: var(--space-6);
        overflow-y: auto;
    }

    .filter-sidebar--open {
        display: block;
    }

    .filter-sidebar__close {
        display: block;
        position: absolute;
        top: var(--space-4);
        right: var(--space-4);
        background: none;
        border: none;
        font-size: var(--text-2xl);
        cursor: pointer;
        color: var(--color-gray-500);
    }

    .filter-toggle-mobile {
        display: inline-flex;
    }
}

/* Skeleton loading */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Panel */
.panel {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-card);
    padding: var(--space-6);
}

/* Task items */
.task-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
}
.task-item:last-child { border-bottom: none; }

.task-check {
    width: 24px; height: 24px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-gray-300);
    background: white;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: var(--text-xs); color: white;
    flex-shrink: 0; transition: all var(--transition-fast);
}
.task-check:hover { border-color: var(--color-teal-500); }
.task-check--done {
    background: var(--color-teal-500);
    border-color: var(--color-teal-500);
    color: white;
}
.task-check--future {
    border-color: var(--color-gray-200);
    background: var(--color-gray-50);
    cursor: default;
}

/* Progress bar */
.progress-row {
    display: flex; align-items: center; gap: var(--space-3);
}
.progress-bar {
    flex: 1; height: 8px;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-teal-500), var(--color-teal-400));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    min-width: 0;
}

.ml-2 { margin-left: var(--space-2); }

/* File upload zone */
.file-upload {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-6) var(--space-4);
    border: 2px dashed var(--color-gray-200);
    border-radius: var(--radius-xl);
    background: var(--color-gray-50);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.file-upload:hover {
    border-color: var(--color-primary-300);
    background: var(--color-primary-50);
}

.file-upload--active {
    border-color: var(--color-teal-400);
    background: var(--color-teal-50);
}

.file-upload input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.file-upload__icon {
    font-size: 1.5rem;
    opacity: 0.5;
}

.file-upload__label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.file-upload__hint {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.file-upload__name {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-teal-600);
}

/* Toast notifications */
.toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + var(--space-4));
    right: var(--space-4);
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-100);
    min-width: 280px;
    max-width: 420px;
    pointer-events: auto;
    animation: toast-in var(--transition-slow) ease forwards;
}

.toast--success {
    border-left: 3px solid var(--color-success-500);
}

.toast--error {
    border-left: 3px solid var(--color-error-500);
}

.toast--info {
    border-left: 3px solid var(--color-primary-400);
}

.toast__icon {
    font-size: var(--text-lg);
    flex-shrink: 0;
}

.toast__message {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    line-height: 1.4;
}

.toast__close {
    background: none;
    border: none;
    padding: var(--space-1);
    cursor: pointer;
    color: var(--color-gray-400);
    margin-left: auto;
    flex-shrink: 0;
    font-size: var(--text-lg);
    line-height: 1;
}

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

.toast--exit {
    animation: toast-out var(--transition-base) ease forwards;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(40px); }
}

/* Page transition */
.page-transition {
    animation: page-fade-in var(--transition-slow) ease;
}

@keyframes page-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Course form */
.course-form {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Edit layout */
.edit-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
}

@media (max-width: 1024px) {
    .edit-layout {
        grid-template-columns: 1fr;
    }
}

/* Content prose */
.prose {
    line-height: 1.8;
    color: var(--color-gray-600);
}

/* White section */
.section--white {
    background: white;
    border-bottom: 1px solid var(--color-gray-100);
}

/* CTA section */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-teal-700) 100%);
    color: white;
}

.cta-section h2 {
    color: white;
    margin-bottom: var(--space-4);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-lg);
    max-width: 500px;
    margin: 0 auto var(--space-8);
}

.cta-section .btn--white {
    background: white;
    color: var(--color-primary-600);
}

.cta-section .btn--white:hover {
    background: var(--color-gray-50);
    color: var(--color-primary-700);
}

/* Review form wrapper */
.review-form-wrapper {
    background: white;
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
}

/* Reviews container */
.reviews-container {
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
}

/* Hero outline button */
.btn--hero-outline {
    background: rgba(255, 255, 255, 0.1);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    color: white;
}

.btn--hero-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Course hero edit button */
.btn--hero-edit {
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--hero-edit:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* Login */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}

.login-card {
    max-width: 400px;
    width: 100%;
    padding: var(--space-8);
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-100);
}

.login-card__logo {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    display: block;
    border-radius: var(--radius-lg);
}

.login-card__subtitle {
    margin-top: var(--space-2);
}

.login-card__notice {
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.login-card__terms {
    margin-top: var(--space-6);
}

/* Task flex content */
.task-item__content {
    flex: 1;
}

/* Text color utilities */
.text-warning { color: var(--color-warning-600); }
.text-error { color: var(--color-error-500); }

/* Task completed strikethrough */
.task-item__title--done {
    text-decoration: line-through;
    opacity: 0.5;
}

/* Course image full */
.course-image--full {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

/* Filter search bar compact */
.search-bar--compact {
    box-shadow: var(--shadow-sm);
    flex: 1;
    max-width: 400px;
}

/* Pagination */
.pagination {
    padding: var(--space-4) 0;
}

/* Value proposition cards */
.value-card {
    text-align: center;
    padding: var(--space-8) var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-slow);
}

.value-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
}

.value-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.value-card h3 {
    margin-bottom: var(--space-3);
}

.value-card p {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* Gift section */
.gift-section {
    background: linear-gradient(135deg, #faf5ff 0%, #f0fdfa 100%);
}

.gift-section__inner {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-12);
    align-items: center;
}

.gift-section__badge {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-teal-500));
    color: white;
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.gift-section__content h2 {
    margin-bottom: var(--space-4);
}

.gift-section__content > p {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-6);
}

.gift-section__examples {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.gift-example {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
    box-shadow: var(--shadow-sm);
}

.gift-example__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.gift-example strong {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-gray-800);
}

.gift-example span {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.gift-section__visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gift-box {
    width: 220px;
    height: 220px;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-teal-500));
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.gift-box__ribbon {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 16px;
    background: #fbbf24;
    border-radius: var(--radius-full);
}

.gift-box__ribbon::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 110px;
    background: #fbbf24;
    opacity: 0.4;
}

.gift-box__content {
    text-align: center;
    color: white;
}

.gift-box__emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-2);
}

.gift-box__text {
    font-size: var(--text-sm);
    font-weight: 600;
    opacity: 0.9;
    line-height: 1.4;
}

@media (max-width: 1024px) {
    .gift-section__inner {
        grid-template-columns: 1fr;
    }
    .gift-section__visual {
        display: none;
    }
}

.skeleton {
    background: linear-gradient(90deg, var(--color-gray-100) 25%, var(--color-gray-200) 50%, var(--color-gray-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* Booking page */
.booking-summary {
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.booking-details {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.booking-details li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) 0;
}

.booking-details__label {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
}

.booking-price {
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--color-primary-600);
}

.booking-payment-note {
    background: var(--color-gray-50);
    border-left: 3px solid var(--color-primary-600);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--color-gray-600);
}

/* Highlights grid */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

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

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

.schedule-list--compact {
    gap: var(--space-1);
}

.schedule-item--compact {
    display: flex;
    justify-content: space-between;
    padding: var(--space-1) 0;
    font-size: var(--text-sm);
}

/* Course detail sections */
.course-section {
    margin-bottom: var(--space-10);
}

.course-hero__back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-sm);
    text-decoration: none;
    margin-bottom: var(--space-4);
    transition: color var(--transition-fast);
}

.course-hero__back:hover {
    color: white;
    text-decoration: none;
}

/* Course highlights grid */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

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

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}

.highlight-item__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.highlight-item strong {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.highlight-item span {
    font-size: var(--text-sm);
    color: var(--color-gray-800);
}

/* Instructor card */
.instructor-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
}

.contact-inline {
    padding: var(--space-5);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}

/* Sticky sidebar card */
.course-sidebar__card--sticky {
    position: sticky;
    top: calc(var(--navbar-height) + var(--space-6));
}

.text-center { text-align: center; }
.mb-3 { margin-bottom: var(--space-3); }

/* Course prerequisite */
.course-prereq {
    padding: var(--space-4);
    background: #fffbeb;
    border-left: 3px solid #f59e0b;
    border-radius: var(--radius-sm);
}

.text-white { color: white; }
.text-white-70 { color: rgba(255,255,255,0.7); }
.text-white-50 { color: rgba(255,255,255,0.5); }
.text-xs { font-size: var(--text-xs); }
.m-0 { margin: 0; }
.ml-auto { margin-left: auto; }
.flex-wrap { flex-wrap: wrap; }

.avatar--ghost { background: rgba(255,255,255,0.2); }

.view-toggle {
    display: flex;
    gap: var(--space-1);
    margin-left: auto;
}

.view-toggle__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: white;
    cursor: pointer;
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
}

.view-toggle__btn:hover {
    color: var(--color-gray-600);
    border-color: var(--color-gray-300);
}

.view-toggle__btn--active {
    color: var(--color-teal);
    border-color: var(--color-teal);
    background: #f0fdfa;
}

.course-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--color-gray-200);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.course-list-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    background: white;
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-fast);
}

.course-list-item:hover {
    background: var(--color-gray-50);
}

.course-list-item__badges {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    min-width: 100px;
}

.course-list-item__main {
    flex: 1;
    min-width: 0;
}

.course-list-item__title {
    font-size: var(--text-base);
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-list-item__instructor {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.course-list-item__meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
    min-width: 100px;
}

.course-list-item__price {
    font-weight: 700;
    font-size: var(--text-sm);
    min-width: 70px;
    text-align: right;
}

@media (max-width: 768px) {
    .course-list-item {
        flex-wrap: wrap;
        gap: var(--space-2);
    }
    .course-list-item__badges {
        flex-direction: row;
        min-width: auto;
    }
    .course-list-item__meta {
        min-width: auto;
        flex-direction: row;
        gap: var(--space-3);
    }
}

.badge--lg {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-4);
}

.form-group--error .form-input,
.form-group--error .form-select,
.form-group--error .form-textarea {
    border-color: var(--color-error);
}

.form-error {
    display: block;
    color: var(--color-error);
    font-size: var(--text-xs);
    margin-top: var(--space-1);
}

.htmx-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: var(--color-teal);
    z-index: 9999;
    transition: width 0.4s ease;
    pointer-events: none;
}

.htmx-progress--active {
    width: 70%;
    transition: width 8s cubic-bezier(0.1, 0.05, 0, 1);
}

.htmx-progress--done {
    width: 100%;
    transition: width 0.2s ease;
    opacity: 0;
    transition: width 0.2s ease, opacity 0.3s ease 0.2s;
}

.pwa-install-banner {
    position: fixed;
    bottom: var(--space-3);
    left: var(--space-3);
    right: var(--space-3);
    z-index: 1200;
    animation: toast-in 300ms ease;
}

@media (max-width: 768px) {
    .pwa-install-banner {
        bottom: calc(3.5rem + var(--space-3) + env(safe-area-inset-bottom, 0px));
    }
}

@media (min-width: 769px) {
    .pwa-install-banner {
        left: auto;
        right: var(--space-4);
        bottom: var(--space-4);
        max-width: 380px;
    }
}

.pwa-install-inner {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.pwa-install-icon { flex-shrink: 0; }

.pwa-install-text { flex: 1; min-width: 0; }
.pwa-install-text strong { display: block; font-size: var(--text-sm); margin-bottom: 2px; }
.pwa-install-text p { font-size: var(--text-xs); color: var(--color-gray-500); margin: 0; }

.pwa-install-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    align-items: center;
    flex-shrink: 0;
}

.pwa-install-dismiss {
    background: none;
    border: none;
    font-size: var(--text-xs);
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--space-1);
}

.pwa-install-dismiss:hover {
    color: var(--color-gray-600);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}