/**
 * Courses listing page – no Bootstrap/jQuery
 * Matches UI/course.html design with custom class names.
 */

/* Hero strip */
.course-hero-strip {
    padding: 160px 0 60px;
    text-align: center;
}

.course-hero-strip__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin: 0 0 1rem 0;
}

.course-hero-strip__lead {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Filter bar */
.course-filter-bar {
    margin-bottom: 3rem;
}

.course-filter-bar__inner {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 50px;
    padding: 0.75rem 1.25rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    width: 100%;
    box-sizing: border-box;
}

.course-filter-row {
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    gap: 0.75rem;
    align-items: stretch;
    min-width: 0;
}

@media (min-width: 992px) {
    .course-filter-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
    }
}

.course-filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    flex: 1 1 auto;
    min-width: 0;
}

@media (min-width: 992px) {
    .course-filter-group {
        flex: 0 0 auto;
        min-width: 35%;
    }
}

.course-select {
    flex: 1;
    min-width: 140px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23a1a1aa' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 12px 10px;
    padding-right: 2rem;
}

.course-select:focus {
    outline: none;
    border-color: var(--brand-color);
}

.course-select option {
    background: var(--bg-base);
    color: var(--text-primary);
}

.course-filter-group .course-select:not(:first-child) {
    border-left: 1px solid var(--border-subtle);
    border-radius: 0;
}

.course-search-wrap {
    position: relative;
    flex: 1 1 100%;
    min-width: 0;
    max-width: 100%;
}

@media (min-width: 992px) {
    .course-search-wrap {
        flex: 1 1 280px;
        min-width: 200px;
        max-width: 100%;
    }
}

.course-search-wrap .course-search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.course-search-input {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.03);
    border: none;
    color: var(--text-primary);
    padding: 15px 10px 15px 50px;
    font-size: 0.95rem;
    border-radius: var(--radius-pill);
    transition: var(--transition);
}

.course-search-input::placeholder {
    color: var(--text-secondary);
}

.course-search-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.05);
}

/* Featured course block */
.course-featured {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.course-featured:hover {
    border-color: var(--border-hover);
}

.course-featured__layout {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 350px;
}

@media (min-width: 992px) {
    .course-featured__layout {
        grid-template-columns: 7fr 5fr;
    }
}

.course-featured__media {
    position: relative;
    min-height: 280px;
}

@media (min-width: 992px) {
    .course-featured__media {
        min-height: 350px;
    }
}

.course-featured__img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
}

@media (min-width: 992px) {
    .course-featured__img {
        min-height: 350px;
    }
}

.course-featured__body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(to right, rgba(10, 10, 10, 1), rgba(20, 20, 20, 0.8));
}

@media (min-width: 992px) {
    .course-featured__body {
        padding: 2rem 2.5rem;
    }
}

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
    background: rgba(25, 25, 25, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.course-badge--online {
    color: var(--brand-color);
    border-color: rgba(55, 189, 138, 0.3);
}

.course-featured__rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--brand-color);
}

.course-featured__rating span:last-child {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.course-featured__title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    letter-spacing: -0.02em;
}

.course-featured__desc {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
}

.course-featured__meta-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.course-featured__meta-row i {
    margin-right: 0.5rem;
}

.course-featured__footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.course-featured__price {
    margin-right: auto;
}

.course-featured__price-current {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.course-featured__price-old {
    text-decoration: line-through;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

/* Course grid */
.course-grid-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    margin-bottom: 3rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
}

.course-grid-empty__text {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1rem;
}

.course-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

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

@media (min-width: 992px) {
    .course-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.course-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.course-card__media {
    position: relative;
}

.course-card__img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-bottom: 1px solid var(--border-subtle);
}

.course-card__body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-card__title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.35rem 0;
    line-height: 1.3;
}

.course-card__benefit {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0 0 1rem 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card__meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.course-card__meta .course-star {
    color: var(--brand-color);
}

.course-card__meta-row {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.course-card__footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.course-card__price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.course-card__price-current {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.course-card__price-old {
    text-decoration: line-through;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

.course-card__actions {
    display: flex;
    gap: 0.5rem;
}

.course-card__btn {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    border-radius: var(--radius-pill);
    font-weight: 500;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.course-card__btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.course-card__btn--primary {
    background: var(--brand-color);
    border-color: var(--brand-color);
    color: var(--bg-base);
    flex: 0 1 auto;
    padding: 0.5rem 1.25rem;
}

.course-card__btn--primary:hover {
    background: var(--brand-color-hover);
    border-color: var(--brand-color-hover);
    color: var(--bg-base);
    transform: scale(1.02);
}

/* Load more */
.course-load-more-wrap {
    text-align: center;
    margin-bottom: 3rem;
}

.course-load-more-btn {
    padding: 0.75rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.course-load-more-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Trust strip */
.course-trust-strip {
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(5, 5, 5, 0.5);
    padding: 1.5rem 0;
}

.course-trust-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    text-align: center;
}

@media (min-width: 768px) {
    .course-trust-grid {
        grid-template-columns: repeat(4, 1fr);
        text-align: left;
    }
}

.course-trust-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    justify-content: center;
}

@media (min-width: 768px) {
    .course-trust-item {
        justify-content: flex-start;
    }
}

.course-trust-item i {
    color: var(--brand-color);
    font-size: 1.2rem;
}

/* Fade in animation */
.course-fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: courseFadeInUp 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.course-fade-in--delay-1 { animation-delay: 0.1s; }
.course-fade-in--delay-2 {animation-delay: 0.2s;padding-bottom: 30px;}
.course-fade-in--delay-3 { animation-delay: 0.3s; }

@keyframes courseFadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Coming soon: apply deadline + seats chips */
.cs-pre-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.75rem 0 0;
}

.cs-pre-meta__chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(148, 163, 184, 0.25);
    color: var(--text-secondary);
}

.cs-pre-meta__chip i {
    font-size: 0.7rem;
    opacity: 0.9;
}

.cs-pre-meta__chip--warn {
    border-color: rgba(245, 158, 11, 0.45);
    color: #fbbf24;
    background: rgba(245, 158, 11, 0.1);
}

.cs-pre-meta__chip--bad {
    border-color: rgba(248, 113, 113, 0.45);
    color: #fca5a5;
    background: rgba(239, 68, 68, 0.1);
}