/* ===== COURSES / TUTORIALS VIEW ===== */

/* --- Hero --- */
.courses-hero {
    padding: calc(var(--nav-h) + 72px) 28px 56px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.courses-hero__inner {
    max-width: 680px;
    margin: 0 auto;
}

.courses-hero__title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.04;
    color: var(--text);
    margin-bottom: 24px;
}

.courses-hero__title em {
    font-style: normal;
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--teal) 60%, var(--gold) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: shimmer 4s linear infinite;
}

.courses-hero__sub {
    font-size: 1.05rem;
    color: var(--text-2);
    line-height: 1.8;
    max-width: 520px;
    margin: 0 auto;
}

/* --- Filter bar --- */
.courses-filter-bar {
    padding: 0 28px 48px;
    position: relative;
    z-index: 1;
}

.courses-filter-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.course-filter-btn {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border-s);
    background: transparent;
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.2s var(--ease);
    white-space: nowrap;
}

.course-filter-btn:hover {
    color: var(--text);
    border-color: var(--border);
    background: var(--bg-card);
}

.course-filter-btn.active {
    color: var(--gold-light);
    background: var(--gold-dim);
    border-color: rgba(139, 124, 248, 0.3);
}

/* --- Courses grid --- */
.courses-section {
    padding: 0 28px 100px;
    position: relative;
    z-index: 1;
}

.courses-grid {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

/* --- Course card --- */
.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 32px 20px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0;
    transition: border-color 0.25s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(139, 124, 248, 0.04), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.course-card:hover {
    border-color: var(--border-h);
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.course-card:hover::before { opacity: 1; }

/* Icon circle */
.course-card__icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 18px;
    flex-shrink: 0;
    border: 2px solid var(--border-s);
    transition: transform 0.3s var(--ease-back);
}

.course-card:hover .course-card__icon {
    transform: scale(1.08) rotate(-4deg);
}

/* Icon colour variants */
.course-card__icon[data-color="violet"] { background: var(--gold-dim);  border-color: rgba(139,124,248,0.22); }
.course-card__icon[data-color="sky"]    { background: var(--teal-dim);  border-color: rgba(56,189,248,0.22); }
.course-card__icon[data-color="green"]  { background: var(--green-dim); border-color: rgba(74,222,128,0.22); }
.course-card__icon[data-color="rose"]   { background: var(--rose-dim);  border-color: rgba(248,113,113,0.22); }
.course-card__icon[data-color="amber"]  { background: var(--amber-dim); border-color: rgba(251,191,36,0.22); }
.course-card__icon[data-color="pink"]   { background: var(--pink-dim);  border-color: rgba(232,121,249,0.22); }

.course-card__title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.course-card__desc {
    font-size: 0.85rem;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 24px;
    flex: 1;
}

.course-card__meta {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-3);
    letter-spacing: 0.4px;
    margin-bottom: 16px;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.course-card__meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Start Learning button */
.course-card__btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--r-md);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s var(--ease);
    border: none;
    text-decoration: none;
}

.course-card__btn--active {
    background: linear-gradient(135deg, var(--gold) 0%, #6d5dfc 100%);
    color: #fff;
    box-shadow: 0 4px 20px var(--gold-glow);
}

.course-card__btn--active:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 28px var(--gold-glow);
    filter: brightness(1.08);
}

.course-card__btn--soon {
    background: var(--bg-alt);
    color: var(--text-3);
    border: 1px solid var(--border-s);
    cursor: default;
}

/* No results */
.courses-no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-3);
    font-size: 0.95rem;
    display: none;
}