/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #080c10;
    --bg2: #0d1117;
    --surface: #111820;
    --surface2: #18222e;
    --border: rgba(255,255,255,0.07);
    --border-h: rgba(255,255,255,0.14);
    --text: #e8edf2;
    --text-muted: #7a8a9a;
    --text-dim: #3a4a5a;
    --accent: #3ecfff;
    --accent2: #7c6aff;
    --accent3: #ff6a6a;
    --gold: #f0b429;
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Mono', monospace;
    --font-serif: 'Instrument Serif', serif;
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 300;
}

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 2px; }

/* ===== CONTAINER ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 32px; }

/* ===== NAV ===== */
#nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(8, 12, 16, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.nav-inner {
    max-width: 1100px; margin: 0 auto; padding: 0 32px;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--accent);
}
.nav-links {
    display: flex; align-items: center; gap: 32px;
}
.nav-links a {
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    transition: color var(--transition);
    font-weight: 400;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
    background: var(--accent) !important;
    color: var(--bg) !important;
    padding: 8px 20px !important;
    border-radius: 100px !important;
    font-weight: 500 !important;
    transition: opacity var(--transition) !important;
}
.nav-cta:hover { opacity: 0.85; }

.hamburger {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
    display: block; width: 22px; height: 1.5px;
    background: var(--text); border-radius: 2px;
    transition: var(--transition);
}
.mobile-menu {
    display: none; flex-direction: column; gap: 0;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.mobile-menu a {
    padding: 16px 32px;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--text); }
.mobile-menu.open { display: flex; }

/* ===== SECTION BASE ===== */
.section { padding: 100px 0; }
.section-label {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 500;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--text);
}
.section-title em {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--accent);
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
    padding-top: 64px;
}
.hero-bg {
    position: absolute; inset: 0; pointer-events: none;
}
.grid-overlay {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 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(80px); opacity: 0.12;
}
.g1 { width: 600px; height: 600px; background: var(--accent2); top: -200px; right: -200px; }
.g2 { width: 400px; height: 400px; background: var(--accent); bottom: -100px; left: -100px; }

.hero-content {
    position: relative; z-index: 1;
    max-width: 700px; padding: 0 32px;
    text-align: left;
}
.hero-tag {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--text-muted);
    background: var(--surface); border: 1px solid var(--border);
    padding: 6px 16px; border-radius: 100px; margin-bottom: 32px;
}
.dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: #22c55e; flex-shrink: 0;
    box-shadow: 0 0 8px #22c55e;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}
.hero-name .line { display: block; }
.hero-name .italic-serif {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--accent);
}
.hero-role {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 24px;
}
.hero-bio {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 500px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    border: 1px solid var(--border-h);
    color: var(--text);
    padding: 12px 24px; border-radius: 100px;
    font-family: var(--font-display);
    font-size: 0.8rem; font-weight: 600;
    letter-spacing: 0.05em;
    transition: all var(--transition);
    background: var(--surface);
}
.btn-outline svg { width: 16px; height: 16px; }
.btn-outline:hover {
    background: var(--surface2);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: var(--text-dim); font-size: 0.65rem; letter-spacing: 0.2em;
    text-transform: uppercase;
}
.scroll-line {
    width: 1px; height: 40px;
    background: linear-gradient(to bottom, var(--text-dim), transparent);
    animation: scrollDown 1.5s ease-in-out infinite;
}
@keyframes scrollDown {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== ABOUT ===== */
.about-section { background: var(--bg2); }
.about-grid {
    display: grid; grid-template-columns: 1fr 2fr; gap: 80px; align-items: start;
}
.about-text {
    font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; line-height: 1.9;
}
.about-text strong { color: var(--text); font-weight: 500; }
.edu-cards { display: flex; flex-direction: column; gap: 12px; margin-top: 32px; }
.edu-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 24px;
    transition: border-color var(--transition);
}
.edu-card:hover { border-color: var(--border-h); }
.edu-year { font-size: 0.7rem; color: var(--accent); letter-spacing: 0.1em; margin-bottom: 6px; }
.edu-name { font-family: var(--font-display); font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.edu-place { font-size: 0.78rem; color: var(--text-muted); }
.edu-place strong { color: var(--text); }

/* ===== PROJECTS ===== */
.projects-section { background: var(--bg); }
.section-header-row { margin-bottom: 60px; }
.projects-list { display: flex; flex-direction: column; gap: 0; }
.project-item {
    display: grid; grid-template-columns: 80px 1fr;
    border-top: 1px solid var(--border);
    padding: 48px 0;
    transition: background var(--transition);
    gap: 0;
}
.project-item:last-child { border-bottom: 1px solid var(--border); }
.project-num {
    font-family: var(--font-display);
    font-size: 0.7rem; font-weight: 700;
    color: var(--text-dim); letter-spacing: 0.05em;
    padding-top: 4px;
}
.project-top {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 16px; gap: 20px;
}
.project-name {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 700;
    letter-spacing: -0.01em; margin-bottom: 4px;
    transition: color var(--transition);
}
.project-item:hover .project-name { color: var(--accent); }
.project-sub { font-size: 0.78rem; color: var(--text-muted); }
.project-arrow {
    width: 40px; height: 40px; border-radius: 50%;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; color: var(--text-muted);
    transition: all var(--transition);
}
.project-arrow svg { width: 16px; height: 16px; }
.project-arrow:hover {
    background: var(--accent); border-color: var(--accent);
    color: var(--bg); transform: rotate(-45deg);
}
.muted-arrow { cursor: default; }
.muted-arrow:hover { background: var(--surface); color: var(--text-muted); transform: none; }
.project-desc {
    font-size: 0.85rem; color: var(--text-muted);
    line-height: 1.8; margin-bottom: 20px; max-width: 640px;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tags span {
    font-size: 0.7rem; letter-spacing: 0.05em;
    padding: 4px 12px; border-radius: 100px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    background: var(--surface);
    transition: all var(--transition);
}
.project-item:hover .project-tags span {
    border-color: rgba(62, 207, 255, 0.2);
    color: var(--accent);
}

/* ===== SKILLS ===== */
.skills-section { background: var(--bg2); }
.skills-section .section-label { margin-bottom: 8px; }
.skills-section .section-title { margin-bottom: 48px; }
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.skill-group {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: border-color var(--transition);
}
.skill-group:hover { border-color: var(--border-h); }
.skill-group-label {
    font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 14px; font-weight: 500;
}
.skill-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-chips span {
    font-size: 0.75rem; padding: 4px 12px;
    border-radius: 100px; border: 1px solid var(--border);
    color: var(--text-muted); background: var(--bg2);
}

/* ===== ACHIEVEMENTS ===== */
.achievements-section { background: var(--bg); }
.achievements-section .section-label { margin-bottom: 8px; }
.achievements-section .section-title { margin-bottom: 48px; }
.ach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 40px; }
.ach-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: all var(--transition);
}
.ach-card:hover {
    border-color: var(--border-h); transform: translateY(-4px);
}
.ach-card.featured {
    border-color: rgba(240, 180, 41, 0.3);
    background: rgba(240, 180, 41, 0.04);
}
.ach-card.featured:hover { border-color: rgba(240, 180, 41, 0.6); }
.ach-icon { font-size: 1.6rem; margin-bottom: 12px; }
.ach-title {
    font-family: var(--font-display);
    font-size: 0.9rem; font-weight: 700; margin-bottom: 8px;
}
.ach-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

.leadership-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.lead-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
    transition: border-color var(--transition);
}
.lead-card:hover { border-color: var(--border-h); }
.lead-badge {
    display: inline-block; font-size: 0.65rem; letter-spacing: 0.12em;
    text-transform: uppercase; padding: 3px 10px; border-radius: 100px;
    background: rgba(62, 207, 255, 0.1); color: var(--accent);
    border: 1px solid rgba(62, 207, 255, 0.2); margin-bottom: 12px;
}
.lead-title {
    font-family: var(--font-display);
    font-size: 0.9rem; font-weight: 700; margin-bottom: 4px;
}
.lead-org { font-size: 0.75rem; color: var(--accent); margin-bottom: 10px; }
.lead-card p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

/* ===== CONTACT ===== */
.contact-section { background: var(--bg2); }
.contact-inner { max-width: 680px; }
.contact-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800; line-height: 1.1;
    letter-spacing: -0.02em; margin-bottom: 20px;
}
.contact-title em {
    font-family: var(--font-serif); font-style: italic;
    font-weight: 400; color: var(--accent);
}
.contact-sub { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 48px; }
.contact-links { display: flex; flex-direction: column; gap: 12px; }
.contact-link-item {
    display: flex; align-items: center; gap: 16px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 24px;
    transition: all var(--transition);
}
.contact-link-item:hover {
    border-color: var(--accent);
    background: var(--surface2);
    transform: translateX(8px);
}
.cl-icon {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--bg2); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.cl-icon svg { width: 18px; height: 18px; color: var(--accent); }
.cl-label { font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.05em; margin-bottom: 2px; }
.cl-value { font-family: var(--font-display); font-size: 0.88rem; font-weight: 600; }

/* ===== FOOTER ===== */
.footer {
    border-top: 1px solid var(--border);
    background: var(--bg); padding: 32px 0;
}
.footer-inner {
    display: flex; align-items: center; justify-content: space-between;
}
.footer-logo {
    font-family: var(--font-display); font-weight: 800;
    font-size: 0.9rem; letter-spacing: 0.1em; color: var(--accent);
}
.footer-copy { font-size: 0.75rem; color: var(--text-dim); }
.footer-email {
    font-size: 0.75rem; color: var(--text-muted);
    transition: color var(--transition);
}
.footer-email:hover { color: var(--accent); }

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0; transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .container { padding: 0 20px; }
    .section { padding: 70px 0; }
    .hero-content { padding: 0 20px; text-align: center; }
    .hero-actions { justify-content: center; }
    .hero-bio { margin: 0 auto 40px; }
    .hero-tag { font-size: 0.65rem; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .skills-grid { grid-template-columns: 1fr; }
    .ach-grid { grid-template-columns: 1fr; }
    .leadership-row { grid-template-columns: 1fr; }
    .project-item { grid-template-columns: 1fr; gap: 12px; }
    .project-num { display: none; }
    .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
    .ach-grid { grid-template-columns: 1fr; }
}