/* ================================================================
   TECHAVEN — courses.css
   Dedicated styles for the Courses listing + detail pages
   Deep black / electric blue / cyber-noir aesthetic
   ================================================================ */

/* ── Page hero ─────────────────────────────────────────────── */
.courses-hero {
    background: var(--ta-bg);
    padding: 5rem 0 4rem;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--ta-border);
}
.courses-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 60% at 60% 20%, rgba(10,132,255,0.10) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 10% 80%, rgba(10,132,255,0.06) 0%, transparent 60%);
    pointer-events: none;
}
.courses-hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--ta-blue), transparent);
}

.courses-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--ta-blue);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: 1.2rem;
    opacity: 0;
    animation: slideUp 0.6s 0.1s ease forwards;
}
.courses-hero-eyebrow::before {
    content: '';
    width: 28px;
    height: 1px;
    background: var(--ta-blue);
}

.courses-hero-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: clamp(2.6rem, 6vw, 4.4rem);
    font-weight: 700;
    color: #fff;
    line-height: 1;
    letter-spacing: -0.01em;
    margin-bottom: 1.2rem;
    opacity: 0;
    animation: slideUp 0.6s 0.2s ease forwards;
}
.courses-hero-title span {
    background: linear-gradient(135deg, var(--ta-blue), #5cc8ff, var(--ta-blue));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s linear infinite;
}

@keyframes gradientShift {
    0%   { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.courses-hero-sub {
    color: var(--ta-muted);
    font-size: 1rem;
    max-width: 520px;
    line-height: 1.75;
    margin-bottom: 2rem;
    opacity: 0;
    animation: slideUp 0.6s 0.3s ease forwards;
}

.courses-hero-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: slideUp 0.6s 0.4s ease forwards;
}
.ch-stat {
    display: flex;
    align-items: center;
    gap: 10px;
}
.ch-stat-icon {
    width: 36px; height: 36px;
    background: var(--ta-blue-dim);
    border: 1px solid rgba(10,132,255,0.25);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.95rem;
    color: var(--ta-blue);
    flex-shrink: 0;
}
.ch-stat-val  { font-family: 'Rajdhani', sans-serif; font-size: 1.1rem; font-weight: 700; color: #fff; line-height: 1; }
.ch-stat-text { font-size: 0.72rem; color: var(--ta-muted); text-transform: uppercase; letter-spacing: 0.07em; }

/* ── Filter bar ─────────────────────────────────────────────── */
.courses-filter-bar {
    background: #07070f;
    border-bottom: 1px solid var(--ta-border);
    padding: 0;
    position: sticky;
    top: 62px; /* below navbar */
    z-index: 100;
    backdrop-filter: blur(12px);
}
.courses-filter-inner {
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
}
.courses-filter-inner::-webkit-scrollbar { display: none; }

.cf-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 1rem 1.25rem;
    font-family: 'Rajdhani', sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ta-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.22s, border-color 0.22s;
    white-space: nowrap;
}
.cf-btn:hover { color: #fff; }
.cf-btn.active {
    color: var(--ta-blue);
    border-bottom-color: var(--ta-blue);
}
.cf-btn .cf-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--ta-blue-dim);
    color: var(--ta-blue);
    font-size: 0.65rem;
    font-family: 'JetBrains Mono', monospace;
    width: 18px; height: 18px;
    border-radius: 4px;
}
.cf-btn.active .cf-count {
    background: var(--ta-blue);
    color: #fff;
}
.cf-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.cf-dot--cyber { background: var(--ta-cyber); }
.cf-dot--dev   { background: var(--ta-dev); }
.cf-dot--audit { background: var(--ta-audit); }

/* ── Courses grid section ───────────────────────────────────── */
.courses-grid-section {
    padding: 3.5rem 0 5rem;
    background: var(--ta-bg);
}

.courses-section-label {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--ta-border);
}
.csl-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.csl-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.03em;
}
.csl-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--ta-border), transparent);
}
.csl-count {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--ta-muted);
}

/* ── Course card ─────────────────────────────────────────────── */
.ta-course-card-v2 {
    background: var(--ta-bg-card);
    border: 1px solid var(--ta-border);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    /* stagger in on load */
    opacity: 0;
    transform: translateY(24px);
}
.ta-course-card-v2.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.ta-course-card-v2:hover {
    transform: translateY(-6px);
    border-color: var(--ta-border-hov);
    box-shadow:
        0 20px 60px rgba(0,0,0,0.5),
        0 0 0 1px rgba(10,132,255,0.2),
        inset 0 1px 0 rgba(10,132,255,0.1);
}

/* Glowing top edge on hover */
.ta-course-card-v2::before {
    content: '';
    position: absolute;
    top: 0; left: 10%; right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--ta-blue), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.ta-course-card-v2:hover::before { opacity: 1; }

/* Card visual header */
.cv2-header {
    height: 160px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: 14px;
}
.cv2-header--cyber {
    background:
        radial-gradient(ellipse at 30% 50%, rgba(10,132,255,0.28) 0%, transparent 65%),
        radial-gradient(ellipse at 80% 20%, rgba(10,132,255,0.14) 0%, transparent 50%),
        linear-gradient(160deg, #060c18, #04060f);
}
.cv2-header--dev {
    background:
        radial-gradient(ellipse at 30% 50%, rgba(48,209,88,0.22) 0%, transparent 65%),
        radial-gradient(ellipse at 80% 20%, rgba(48,209,88,0.10) 0%, transparent 50%),
        linear-gradient(160deg, #060f08, #04060a);
}
.cv2-header--audit {
    background:
        radial-gradient(ellipse at 30% 50%, rgba(255,159,10,0.22) 0%, transparent 65%),
        radial-gradient(ellipse at 80% 20%, rgba(255,159,10,0.10) 0%, transparent 50%),
        linear-gradient(160deg, #110c04, #04060a);
}

/* Big decorative icon in header */
.cv2-bg-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 5.5rem;
    opacity: 0.09;
    transition: opacity 0.3s ease, transform 0.3s ease;
    line-height: 1;
    pointer-events: none;
}
.ta-course-card-v2:hover .cv2-bg-icon {
    opacity: 0.15;
    transform: translateY(-55%) scale(1.06);
}

/* Discipline badge */
.cv2-badge {
    position: absolute;
    top: 12px; left: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 4px 10px;
    border-radius: 5px;
    z-index: 1;
}
.cv2-badge--cyber { background: rgba(10,132,255,0.18); color: var(--ta-cyber); border: 1px solid rgba(10,132,255,0.3); }
.cv2-badge--dev   { background: rgba(48,209,88,0.14);  color: var(--ta-dev);   border: 1px solid rgba(48,209,88,0.3); }
.cv2-badge--audit { background: rgba(255,159,10,0.14); color: var(--ta-audit); border: 1px solid rgba(255,159,10,0.3); }

/* Level pill */
.cv2-level {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    color: rgba(255,255,255,0.5);
    background: rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 3px 10px;
    backdrop-filter: blur(6px);
    z-index: 1;
}
.cv2-level-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
}

/* Card body */
.cv2-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.cv2-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
    line-height: 1.2;
    transition: color 0.22s;
}
.ta-course-card-v2:hover .cv2-title { color: var(--ta-blue-light); }

.cv2-desc {
    color: var(--ta-muted);
    font-size: 0.82rem;
    line-height: 1.65;
    margin-bottom: 1rem;
    flex: 1;
}

/* Tags row */
.cv2-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 1rem;
}
.cv2-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    color: var(--ta-muted);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--ta-border);
    border-radius: 4px;
    padding: 3px 8px;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.ta-course-card-v2:hover .cv2-tag {
    color: var(--ta-blue-light);
    border-color: rgba(10,132,255,0.2);
    background: rgba(10,132,255,0.06);
}

/* Meta row */
.cv2-meta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    padding-top: 0.9rem;
    border-top: 1px solid var(--ta-border);
    margin-bottom: 1.1rem;
}
.cv2-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: var(--ta-muted);
}
.cv2-meta-item i { color: var(--ta-blue); font-size: 0.75rem; }

/* Footer */
.cv2-footer {
    padding: 0 1.25rem 1.25rem;
    display: flex;
    gap: 8px;
}
.cv2-btn-enroll {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    background: var(--ta-blue);
    color: #fff;
    text-decoration: none;
    font-family: 'Rajdhani', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    padding: 0.65rem 1rem;
    border-radius: 9px;
    border: none;
    cursor: pointer;
    transition: background 0.22s, box-shadow 0.22s, transform 0.18s;
    position: relative;
    overflow: hidden;
}
.cv2-btn-enroll::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.22s;
}
.cv2-btn-enroll:hover {
    background: var(--ta-blue-light);
    box-shadow: 0 0 24px var(--ta-blue-glow), 0 4px 12px rgba(10,132,255,0.3);
    transform: translateY(-1px);
    color: #fff;
}
.cv2-btn-enroll:hover::after { opacity: 1; }

.cv2-btn-details {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--ta-border);
    border-radius: 9px;
    color: var(--ta-muted);
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.22s;
    flex-shrink: 0;
}
.cv2-btn-details:hover {
    background: var(--ta-blue-dim);
    border-color: rgba(10,132,255,0.3);
    color: var(--ta-blue);
}

/* ── Featured / Popular course card (wider) ──────────────────── */
.ta-course-card-v2--featured {
    border-color: rgba(10,132,255,0.25);
    background: linear-gradient(160deg, #0b0e1a, #08080f);
}
.ta-course-card-v2--featured::after {
    content: 'POPULAR';
    position: absolute;
    top: 12px; right: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.58rem;
    letter-spacing: 0.1em;
    color: #fff;
    background: var(--ta-blue);
    padding: 3px 8px;
    border-radius: 4px;
    z-index: 2;
}

/* ── CTA banner ──────────────────────────────────────────────── */
.courses-cta {
    background: #07070f;
    border-top: 1px solid var(--ta-border);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}
.courses-cta::before {
    content: '';
    position: absolute;
    width: 600px; height: 300px;
    background: radial-gradient(ellipse, rgba(10,132,255,0.12), transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}
.courses-cta-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
}
@media(max-width: 768px) {
    .courses-cta-inner { grid-template-columns: 1fr; text-align: center; }
}
.courses-cta-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    color: #fff;
    margin-bottom: 0.5rem;
}
.courses-cta-sub {
    color: var(--ta-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}
.courses-cta-actions { display: flex; gap: 10px; flex-shrink: 0; flex-wrap: wrap; justify-content: flex-end; }
@media(max-width: 768px) { .courses-cta-actions { justify-content: center; } }

/* ── Scroll animation base ───────────────────────────────────── */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Hidden filter state ─────────────────────────────────────── */
.course-group { transition: opacity 0.3s ease; }
.course-group.hidden { display: none; }


.text-mute{
    color: #c3c1c1 !important;
    font-size: 12px;
}