@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Outfit:wght@300;400;500&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
    --bg-primary: #0a0a0f;
    --bg-surface: #0e0e16;
    --bg-card: #13131d;
    --bg-card-hover: #18182a;
    --text-primary: #d4d4d8;
    --text-heading: #f4f4f5;
    --text-dim: #5a5a6e;
    --text-dimmer: #3a3a4e;
    --accent-green: #00ff88;
    --accent-blue: #2563EB;
    --accent-blue-hover: #3b82f6;
    --accent-amber: #ffb800;
    --border: #1a1a28;
    --border-light: #22223a;
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --max-width: 1100px;
    --header-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

::selection {
    background: var(--accent-green);
    color: var(--bg-primary);
}

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

/* ═══════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.terminal-prompt {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-dim);
    letter-spacing: -0.02em;
}

.terminal-cursor {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent-green);
    animation: blink 1s step-end infinite;
}

.header-center {
    display: flex;
    align-items: center;
}

.neural-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-dimmer);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.neural-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 6px var(--accent-green);
    animation: pulse-glow 2s ease-in-out infinite;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.main-nav a {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dim);
    transition: color 0.25s ease;
    white-space: nowrap;
}

.main-nav a:hover {
    color: var(--text-heading);
}

.nav-cta {
    background: var(--accent-blue);
    color: var(--text-heading) !important;
    padding: 6px 16px;
    border-radius: 6px;
    transition: background 0.25s ease, box-shadow 0.25s ease !important;
}

.nav-cta:hover {
    background: var(--accent-blue-hover);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
}

.lang-divider {
    color: var(--text-dimmer);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 2px 4px;
    transition: color 0.2s ease;
}

.lang-btn:hover {
    color: var(--text-heading);
}

.lang-btn.active {
    color: var(--accent-green);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    width: 28px;
    height: 28px;
}

.mobile-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-dim);
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    background: var(--accent-green);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    background: var(--accent-green);
}

/* ═══════════════════════════════════════════
   MOBILE MENU
   ═══════════════════════════════════════════ */

.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.mobile-nav a {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 500;
    color: var(--text-dim);
    transition: color 0.2s ease;
}

.mobile-nav a:hover {
    color: var(--text-heading);
}

.mobile-lang {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 14px;
}

.mobile-lang .lang-btn {
    font-size: 14px;
    padding: 4px 8px;
}

.mobile-lang span {
    color: var(--text-dimmer);
}

/* ═══════════════════════════════════════════
   SECTION SHARED STYLES
   ═══════════════════════════════════════════ */

.section {
    padding: 120px 0;
}

.section-prompt {
    display: block;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--accent-green);
    margin-bottom: 48px;
    letter-spacing: -0.01em;
}

.section-surface {
    background: var(--bg-surface);
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.highlight {
    color: var(--accent-green);
    font-weight: 500;
}

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */

.hero {
    position: relative;
    padding: 160px 0 120px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--accent-green) 0.5px, transparent 0.5px);
    background-size: 48px 48px;
    opacity: 0.025;
    pointer-events: none;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 64px;
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
    max-width: 580px;
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-top: 16px;
}

.hero-role {
    font-family: var(--font-display);
    font-size: 20px;
    color: var(--accent-green);
    font-weight: 500;
    margin-top: 12px;
}

.hero-tagline {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-top: 20px;
    min-height: 62px;
}

.typing-cursor {
    color: var(--accent-green);
    animation: blink 1s step-end infinite;
    font-weight: 300;
}

.hero-location {
    display: block;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-dim);
    margin-top: 16px;
}

.hero-social {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 24px;
}

.hero-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-dim);
    transition: color 0.25s ease, transform 0.25s ease;
}

.hero-social a:hover {
    color: var(--accent-green);
    transform: translateY(-2px);
}

.hero-photo {
    flex-shrink: 0;
}

.photo-frame {
    position: relative;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 2px solid rgba(0, 255, 136, 0.25);
    overflow: hidden;
    box-shadow:
        0 0 40px rgba(0, 255, 136, 0.08),
        0 0 80px rgba(0, 255, 136, 0.04);
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ═══════════════════════════════════════════
   BIO
   ═══════════════════════════════════════════ */

.bio-content {
    max-width: 680px;
}

.bio-content p {
    margin-bottom: 24px;
    color: var(--text-primary);
    font-size: 18px;
    line-height: 1.75;
}

.bio-content p:last-child {
    margin-bottom: 0;
}

/* ═══════════════════════════════════════════
   CURRICULUM / TIMELINE
   ═══════════════════════════════════════════ */

.timeline {
    position: relative;
    padding-left: 32px;
    max-width: 700px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent-green), var(--border-light), transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: 48px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 8px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--accent-green);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent-green);
    letter-spacing: -0.01em;
}

.timeline-role {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--text-heading);
    margin-top: 4px;
}

.timeline-desc {
    font-size: 16px;
    color: var(--text-dim);
    margin-top: 6px;
    line-height: 1.6;
}

/* ═══════════════════════════════════════════
   MASTERCLASS
   ═══════════════════════════════════════════ */

.masterclass-card {
    max-width: 720px;
    background: var(--bg-card);
    border-left: 3px solid var(--accent-green);
    border-radius: 0 12px 12px 0;
    padding: 48px;
    position: relative;
    overflow: hidden;
}

.masterclass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at top left, rgba(0, 255, 136, 0.03), transparent 60%);
    pointer-events: none;
}

.masterclass-title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.02em;
    position: relative;
}

.masterclass-desc {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-top: 16px;
    position: relative;
}

.masterclass-benefits {
    margin-top: 24px;
    position: relative;
}

.masterclass-benefits li {
    font-size: 16px;
    color: var(--text-primary);
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
}

.masterclass-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-family: var(--font-mono);
    font-size: 14px;
}

.cta-button {
    display: inline-block;
    margin-top: 32px;
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--accent-blue);
    padding: 14px 32px;
    border-radius: 8px;
    letter-spacing: 0.02em;
    transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    position: relative;
}

.cta-button:hover {
    background: var(--accent-blue-hover);
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.35);
    transform: translateY(-1px);
}

/* ═══════════════════════════════════════════
   BOOKS
   ═══════════════════════════════════════════ */

.books-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.book-card {
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    background: var(--bg-card-hover);
}

.book-cover {
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: var(--bg-surface);
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.book-card:hover .book-cover img {
    transform: scale(1.03);
}

.book-info {
    padding: 20px;
}

.book-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-heading);
    line-height: 1.3;
}

.book-desc {
    font-size: 14px;
    color: var(--text-dim);
    margin-top: 6px;
    line-height: 1.5;
}

.book-link {
    display: inline-block;
    margin-top: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-blue);
    letter-spacing: -0.01em;
    transition: color 0.2s ease;
}

.book-link:hover {
    color: var(--accent-blue-hover);
}

/* ═══════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════ */

.contact-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 560px;
}

.contact-row {
    display: flex;
    align-items: baseline;
    gap: 16px;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background 0.2s ease;
}

.contact-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-dimmer);
    min-width: 80px;
    flex-shrink: 0;
}

.contact-value {
    font-size: 16px;
    color: var(--text-primary);
    transition: color 0.2s ease;
}

.contact-value:hover {
    color: var(--accent-blue);
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */

.site-footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-dimmer);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-social a {
    color: var(--text-dimmer);
    transition: color 0.2s ease;
}

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

/* ═══════════════════════════════════════════
   GLITCH HOVER
   ═══════════════════════════════════════════ */

.glitch-hover {
    position: relative;
}

.glitch-hover:hover {
    animation: glitch 0.4s ease;
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-1.5px, 0.5px); }
    40% { transform: translate(1.5px, -0.5px); }
    60% { transform: translate(-0.5px, -1px); }
    80% { transform: translate(0.5px, 1px); }
}

/* ═══════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════ */

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 6px var(--accent-green);
    }
    50% {
        opacity: 0.6;
        box-shadow: 0 0 3px var(--accent-green);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-text .section-prompt {
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-name {
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-role {
    animation: fadeInUp 0.6s ease 0.35s both;
}

.hero-tagline {
    animation: fadeInUp 0.6s ease 0.5s both;
}

.hero-location {
    animation: fadeInUp 0.6s ease 0.6s both;
}

.hero-social {
    animation: fadeInUp 0.6s ease 0.7s both;
}

.hero-photo {
    animation: fadeInUp 0.6s ease 0.4s both;
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

@media (max-width: 1024px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }

    .main-nav,
    .lang-switch,
    .header-center {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: 40px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-social {
        justify-content: center;
    }

    .photo-frame {
        width: 180px;
        height: 180px;
    }

    .section-prompt {
        margin-bottom: 32px;
    }

    .masterclass-card {
        padding: 32px 24px;
    }

    .masterclass-title {
        font-size: 22px;
    }

    .books-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .book-card {
        display: grid;
        grid-template-columns: 140px 1fr;
    }

    .book-cover {
        aspect-ratio: auto;
    }

    .book-cover img {
        height: 100%;
    }

    .timeline {
        padding-left: 24px;
    }

    .timeline-item {
        padding-bottom: 36px;
    }

    .timeline-item::before {
        left: -28px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

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

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}