/* ============================================================
   Afrosiob — Main Styles
   Dark tech theme with glassmorphism and gradient accents
   ============================================================ */

:root {
    --bg:        #080c14;
    --bg-2:      #0d1220;
    --bg-card:   #111827;
    --border:    rgba(255,255,255,0.07);
    --border-2:  rgba(255,255,255,0.12);
    --text:      #e2e8f0;
    --text-muted:#94a3b8;
    --text-dim:  #64748b;
    --accent:    #00d4ff;
    --accent-2:  #7c3aed;
    --success:   #10b981;
    --error:     #ef4444;
    --radius:    12px;
    --radius-lg: 20px;
    --shadow:    0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
    --transition: 0.25s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Utilities ─────────────────────────────────────────────── */

.gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(0,212,255,0.08);
    border: 1px solid rgba(0,212,255,0.2);
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 1.2rem;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ── Buttons ───────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #0099bb);
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,212,255,0.35);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-2);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0,212,255,0.05);
}

.btn-full { width: 100%; justify-content: center; }

/* ── Navigation ────────────────────────────────────────────── */

#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background var(--transition), backdrop-filter var(--transition);
}

#header.scrolled {
    background: rgba(8,12,20,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.logo img {
    height: 36px;
    width: 36px;
    object-fit: contain;
    background: white;
    border-radius: 8px;
    padding: 4px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 8px;
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--text);
    background: rgba(255,255,255,0.06);
}

.nav-cta {
    background: linear-gradient(135deg, var(--accent), #0099bb);
    color: #000;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 8px;
    text-decoration: none;
    transition: all var(--transition);
    flex-shrink: 0;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,212,255,0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ── Hero ──────────────────────────────────────────────────── */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--accent);
    top: -200px;
    right: -100px;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-2);
    bottom: -100px;
    left: -100px;
}

.hero .container {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-2);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 2rem;
}

.badge-dot {
    width: 7px;
    height: 7px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-muted);
    max-width: 560px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.hero-tech span {
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'Space Mono', monospace;
    color: var(--text-dim);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 0.05em;
}

/* ── Stats ─────────────────────────────────────────────────── */

.stats {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-2);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    position: relative;
}

.stat-card:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--border);
}

.stat-number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    font-family: 'Space Mono', monospace;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ── Courses ───────────────────────────────────────────────── */

.courses {
    padding: 100px 0;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: hidden;
}

.course-card::before {
    content: attr(data-index);
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 0.7rem;
    font-family: 'Space Mono', monospace;
    color: var(--text-dim);
    font-weight: 700;
}

.course-card:hover {
    border-color: rgba(0,212,255,0.3);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,212,255,0.08);
}

.course-card.featured {
    border-color: rgba(0,212,255,0.25);
    background: linear-gradient(135deg, rgba(0,212,255,0.05), rgba(124,58,237,0.05));
}

.card-badge {
    position: absolute;
    top: -1px;
    left: 2rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #000;
    padding: 3px 12px;
    border-radius: 0 0 8px 8px;
}

.card-icon {
    font-size: 2rem;
    line-height: 1;
}

.card-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.card-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.card-topics {
    list-style: none;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.card-topics li {
    font-size: 0.82rem;
    color: var(--text-dim);
    padding-left: 1.2rem;
    position: relative;
}

.card-topics li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 0.75rem;
}

.card-level {
    margin-top: auto;
    font-size: 0.72rem;
    font-weight: 700;
    font-family: 'Space Mono', monospace;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(0,212,255,0.08);
    border: 1px solid rgba(0,212,255,0.15);
    padding: 4px 10px;
    border-radius: 6px;
    align-self: flex-start;
}

/* ── About ─────────────────────────────────────────────────── */

.about {
    padding: 100px 0;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-content h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.2rem;
}

.about-content p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-top: 2rem;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.feature-icon {
    font-size: 1.3rem;
    width: 44px;
    height: 44px;
    background: rgba(0,212,255,0.08);
    border: 1px solid rgba(0,212,255,0.15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.feature span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Terminal */
.terminal {
    background: #0a0e1a;
    border: 1px solid rgba(0,212,255,0.15);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.05);
}

.terminal-header {
    background: #111827;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-bottom: 1px solid rgba(0,212,255,0.08);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red    { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green  { background: #10b981; }

.terminal-title {
    margin-left: auto;
    font-size: 0.75rem;
    font-family: 'Space Mono', monospace;
    color: var(--text-dim);
}

.terminal-body {
    padding: 1.5rem;
    font-family: 'Space Mono', monospace;
    font-size: 0.82rem;
    line-height: 2;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.t-line { color: var(--text-muted); }
.t-prompt { color: var(--accent); margin-right: 8px; }
.t-out { color: var(--text-dim); padding-left: 1.2rem; }
.t-success { color: var(--success); padding-left: 1.2rem; }

.t-cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

/* ── Contact ───────────────────────────────────────────────── */

.contact {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.contact-info h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.2rem;
}

.contact-info p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.contact-icon {
    font-size: 1.1rem;
}

.contact-form-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 1.2rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    background: var(--bg-2);
    border: 1px solid var(--border-2);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    padding: 12px 16px;
    outline: none;
    transition: border-color var(--transition);
    width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-dim);
}

.form-group textarea {
    min-height: 130px;
    resize: vertical;
}

#contactStatus {
    margin-top: 1rem;
    font-size: 0.88rem;
    text-align: center;
    min-height: 1.4em;
}

.contact-status.success { color: var(--success); }
.contact-status.error   { color: var(--error); }

/* ── Footer ────────────────────────────────────────────────── */

footer {
    background: var(--bg-2);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-brand img {
    height: 32px;
    width: 32px;
    object-fit: contain;
    background: white;
    border-radius: 6px;
    padding: 3px;
}

.footer-brand span {
    font-weight: 700;
    font-size: 1rem;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
    max-width: 260px;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-links strong {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-links a:hover { color: var(--accent); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-dim);
}

/* ── Responsive ────────────────────────────────────────────── */

@media (max-width: 1024px) {
    .course-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid  { grid-template-columns: 1fr; gap: 3rem; }
    .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .hamburger { display: flex; }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(8,12,20,0.97);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 1.5rem;
        gap: 0.5rem;
    }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-card:nth-child(2)::after { display: none; }

    .course-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-card::after { display: none; }
}