/* ==========================================================================
   Design Tokens
   ========================================================================== */
:root {
    --bg: #0a0e14;
    --bg-alt: #0e141d;
    --panel: #131a24;
    --panel-2: #171f2b;
    --border: #232c3a;
    --border-soft: #1a2230;
    --text: #e9eef4;
    --text-dim: #8b96a5;
    --text-faint: #57667a;

    --green: #05b962;
    --green-dim: #04964f;
    --green-glow: rgba(5, 185, 98, 0.35);
    --amber: #ffb454;
    --amber-dim: #e8993a;
    --red: #ff6b6b;

    --font-display: 'Space Grotesk', 'Tajawal', sans-serif;
    --font-body: 'Inter', 'Tajawal', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    --ease: cubic-bezier(.16,.84,.44,1);
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
    background: var(--bg);
    background-image:
        radial-gradient(circle at 15% 0%, rgba(5,185,98,0.08), transparent 40%),
        radial-gradient(circle at 85% 20%, rgba(255,180,84,0.05), transparent 35%);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

a { color: var(--green); text-decoration: none; transition: color 0.25s var(--ease); }
a:hover { color: var(--amber); }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

::selection { background: var(--green-glow); color: #fff; }

:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > * { transition-delay: calc(var(--i, 0) * 90ms); }

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 13px 26px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    font-family: var(--font-body);
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
    position: relative;
}

.btn-primary {
    background: linear-gradient(135deg, var(--green), var(--green-dim));
    color: #041b0f;
}
.btn-primary:hover {
    color: #041b0f;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px -8px var(--green-glow);
}

.btn-secondary {
    background: var(--panel-2);
    color: var(--text);
    border-color: var(--border);
}
.btn-secondary:hover {
    color: var(--text);
    border-color: var(--amber);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}
.btn-outline:hover {
    border-color: var(--green);
    color: var(--green);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background: rgba(5, 185, 98, 0.1);
    color: var(--green);
    border: 1px solid rgba(5, 185, 98, 0.3);
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    margin-bottom: 18px;
}
.badge::before {
    content: '';
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
    animation: pulse-dot 1.8s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(10, 14, 20, 0.7);
    backdrop-filter: blur(14px) saturate(140%);
    border-bottom: 1px solid var(--border-soft);
    z-index: 1000;
    padding: 16px 0;
    transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.nav-container { display: flex; justify-content: space-between; align-items: center; }

.brand-logo {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 4px;
}
.brand-logo .highlight { color: var(--green); }
.brand-logo .cursor-blink {
    width: 8px; height: 1.1em;
    background: var(--amber);
    display: inline-block;
    margin-inline-start: 4px;
    animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav-links { display: flex; list-style: none; gap: 30px; }
.nav-links a { color: var(--text-dim); font-size: 0.93rem; font-weight: 500; position: relative; }
.nav-links a::after {
    content: '';
    position: absolute; left: 0; bottom: -6px;
    width: 0; height: 2px;
    background: var(--green);
    transition: width 0.25s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 100px 0 70px; border-bottom: 1px solid var(--border-soft); position: relative; }

.hero-container {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 50px;
    align-items: center;
}

.hero-content h1 {
    font-family: var(--font-display);
    font-size: 2.9rem;
    line-height: 1.15;
    margin-bottom: 18px;
    letter-spacing: -0.01em;
}

.gradient-text {
    background: linear-gradient(90deg, var(--green), var(--amber));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    color: var(--text-dim);
    font-size: 1.08rem;
    margin-bottom: 30px;
    max-width: 52ch;
}
.hero-description strong { color: var(--text); }

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
    display: flex;
    gap: 34px;
    margin-top: 42px;
    padding-top: 28px;
    border-top: 1px solid var(--border-soft);
}
.hero-stat-num {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--green);
}
.hero-stat-label {
    font-size: 0.78rem;
    color: var(--text-faint);
    margin-top: 2px;
}

/* Terminal window (hero signature) */
.terminal {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 25px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.02);
    animation: float-terminal 6s ease-in-out infinite;
}
@keyframes float-terminal {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 13px 16px;
    background: var(--panel-2);
    border-bottom: 1px solid var(--border);
}
.terminal-dot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }
.terminal-title {
    margin-inline-start: auto;
    margin-inline-end: auto;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-faint);
}

.terminal-body {
    padding: 24px 22px;
    font-family: var(--font-mono);
    font-size: 0.92rem;
    line-height: 1.9;
    min-height: 220px;
}
.terminal-line { display: flex; gap: 10px; }
.terminal-line .ln { color: var(--text-faint); width: 18px; flex-shrink: 0; text-align: right; user-select: none; }
.terminal-line .code { white-space: pre; }
.tok-kw { color: var(--amber); }
.tok-str { color: var(--green); }
.tok-fn { color: #7ee0ff; }
.tok-com { color: var(--text-faint); }
.terminal-caret {
    display: inline-block;
    width: 8px; height: 1.1em;
    background: var(--green);
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section { padding: 100px 0; }
.bg-alt { background: var(--bg-alt); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }

.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--green);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}

.section-header { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-header h2 { font-family: var(--font-display); font-size: 2.1rem; margin-bottom: 12px; letter-spacing: -0.01em; }
.section-header p { color: var(--text-dim); }

.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.card:hover {
    transform: translateY(-6px);
    border-color: var(--green);
    box-shadow: 0 20px 40px -20px var(--green-glow);
}
.card-icon {
    width: 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    color: var(--green);
    background: rgba(5,185,98,0.1);
    border-radius: 10px;
    margin-bottom: 18px;
}
.card h3 { font-family: var(--font-display); margin-bottom: 10px; font-size: 1.15rem; }
.card p { color: var(--text-dim); font-size: 0.95rem; }

/* ==========================================================================
   Curriculum Accordion
   ========================================================================== */
.accordion { display: flex; flex-direction: column; gap: 14px; }

.acc-item {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.3s var(--ease);
}
.acc-item.is-open { border-color: var(--green); }

.acc-header {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    padding: 24px 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: start;
    color: var(--text);
    font-family: var(--font-body);
}

.acc-line {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-faint);
    width: 28px;
    flex-shrink: 0;
}
.acc-item.is-open .acc-line { color: var(--green); }

.acc-title { flex: 1; }
.acc-title h3 { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 4px; }
.acc-title span { color: var(--text-dim); font-size: 0.9rem; }

.acc-chevron {
    color: var(--text-faint);
    transition: transform 0.3s var(--ease), color 0.3s var(--ease);
    flex-shrink: 0;
}
.acc-item.is-open .acc-chevron { transform: rotate(180deg); color: var(--green); }

.acc-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease);
}
.acc-panel-inner {
    padding: 0 28px 28px 74px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.topic-chip {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 7px 14px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-dim);
}

/* ==========================================================================
   Asset Tabs (Showcase)
   ========================================================================== */
.tabs-wrap {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.tab-list {
    display: flex;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}
.tab-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 26px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-faint);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.tab-btn i { font-size: 1rem; }
.tab-btn:hover { color: var(--text); background: rgba(255,255,255,0.02); }
.tab-btn.is-active { color: var(--green); border-bottom-color: var(--green); }

.tab-panels { position: relative; min-height: 280px; }
.tab-panel {
    display: none;
    padding: 40px;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
}
.tab-panel.is-active { display: grid; animation: fade-in 0.4s var(--ease); }
@keyframes fade-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.tab-panel-info h3 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 12px; }
.tab-panel-info p { color: var(--text-dim); margin-bottom: 22px; }
.tab-panel-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.tab-panel-list li { color: var(--text-dim); font-size: 0.9rem; display: flex; align-items: center; gap: 10px; }
.tab-panel-list i { color: var(--green); font-size: 0.8rem; }

.tab-panel-preview {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 22px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-dim);
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.7;
}

/* ==========================================================================
   Stats Counter Section
   ========================================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.stat-box {
    background: var(--panel);
    padding: 40px 24px;
    text-align: center;
}
.stat-num {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--green);
    display: block;
}
.stat-label {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* ==========================================================================
   Author
   ========================================================================== */
.author-container { max-width: 760px; }
.author-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.author-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--green-glow), transparent 40%);
    opacity: 0.5;
    pointer-events: none;
}
.author-card h2 { font-family: var(--font-display); font-size: 1.8rem; margin-bottom: 8px; }
.author-title { color: var(--green); font-weight: 600; margin-bottom: 16px; font-family: var(--font-mono); font-size: 0.9rem; }
.author-bio { color: var(--text-dim); margin-bottom: 28px; max-width: 50ch; margin-inline: auto; }
.author-links { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { padding: 46px 0; text-align: center; border-top: 1px solid var(--border-soft); color: var(--text-faint); font-size: 0.88rem; }
.disclaimer { font-size: 0.78rem; margin-top: 10px; opacity: 0.7; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-actions, .hero-stats { justify-content: center; }
    .hero-description { margin-inline: auto; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .tab-panel { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .nav-links { display: none; }
    .grid-2, .grid-4 { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 2.1rem; }
    .section { padding: 70px 0; }
    .acc-panel-inner { padding-inline-start: 28px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .tab-btn { padding: 16px 18px; font-size: 0.85rem; }
}