/* ── DESIGN SYSTEM ── */
:root { --bg: #08090d; --bg2: #0d0f17; --bg3: #13151f; --bg4: #191c28; --fg: #dde1ec; --fg2: #6e7491; --fg3: #3d4260; --accent: #00e5a0; --accent-d: #00b87d; --accent-bg: rgba(0,229,160,0.07); --accent-border:rgba(0,229,160,0.18); --border: #161925; --border2: #20243a; --grotesk: 'Space Grotesk', system-ui, sans-serif; --mono: 'Space Mono', monospace; --px: max(48px, calc((100vw - 1280px) / 2 + 48px)); }

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

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

body { background: var(--bg); color: var(--fg); font-family: var(--grotesk); font-weight: 400; line-height: 1.65; overflow-x: hidden; min-height: 100vh; }

/* ── GRID TEXTURE ── */
body::before { content: ''; position: fixed; inset: 0; z-index: 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: 56px 56px; pointer-events: none; }

* { position: relative; z-index: 1; }

/* ── NAV ── */
#nav { position: fixed; top: 0; left: 0; right: 0; z-index: 200; height: 56px; display: flex; align-items: center; padding: 0 var(--px); background: rgba(8, 9, 13, 0.88); backdrop-filter: blur(16px) saturate(1.4); border-bottom: 1px solid var(--border2); }

.nav-logo { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); text-decoration: none; letter-spacing: 0.04em; margin-right: auto; transition: opacity 0.2s; }

.nav-logo:hover { opacity: 0.75; color: var(--accent); text-decoration: none; }

.nav-links { display: flex; gap: 2px; list-style: none; }

.nav-links a { display: block; padding: 0.35rem 0.9rem; font-family: var(--mono); font-size: 0.72rem; color: var(--fg2); text-decoration: none; letter-spacing: 0.06em; border: 1px solid transparent; transition: all 0.15s; }

.nav-links a:visited { color: var(--fg2); }

.nav-links a:hover, .nav-links a.active { color: var(--accent); border-color: var(--accent-border); background: var(--accent-bg); text-decoration: none; }

.nav-cv { margin-left: 16px; padding: 0.35rem 1rem !important; background: var(--accent) !important; color: var(--bg) !important; border-color: var(--accent) !important; font-weight: 700 !important; }

.nav-cv:visited { color: var(--bg) !important; }

.nav-cv:hover { background: var(--accent-d) !important; border-color: var(--accent-d) !important; color: var(--bg) !important; }

/* ── HERO ── */
#hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 100px var(--px) 80px; overflow: hidden; }

.hero-kicker { display: flex; align-items: center; gap: 12px; font-family: var(--mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.14em; margin-bottom: 32px; opacity: 0; animation: rise 0.5s 0.1s ease forwards; }

.hero-kicker::before { content: '>'; color: var(--fg3); }

.hero-kicker span { color: var(--fg2); }

.hero-name { font-family: var(--grotesk); font-size: clamp(4rem, 10vw, 9.5rem); font-weight: 700; line-height: 0.88; letter-spacing: -0.045em; color: var(--fg); opacity: 0; animation: rise 0.65s 0.25s ease forwards; }

.hero-name .hi { color: var(--accent); }

.hero-desc { margin-top: 36px; max-width: 520px; display: grid; grid-template-columns: 14px 1fr; gap: 0 16px; opacity: 0; animation: rise 0.6s 0.55s ease forwards; }

.hero-desc-bar { width: 2px; background: var(--accent); margin-top: 4px; align-self: stretch; }

.hero-desc-text { font-size: 0.93rem; color: var(--fg2); line-height: 1.8; }

.hero-stats { display: flex; gap: 48px; margin-top: 56px; opacity: 0; animation: rise 0.6s 0.8s ease forwards; }

.hstat { display: flex; flex-direction: column; gap: 4px; }

.hstat-val { font-family: var(--grotesk); font-size: 2rem; font-weight: 700; letter-spacing: -0.04em; color: var(--fg); line-height: 1; }

.hstat-val .acc { color: var(--accent); }

.hstat-label { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg3); }

.hero-ctas { display: flex; gap: 12px; margin-top: 48px; opacity: 0; animation: rise 0.6s 1.0s ease forwards; }

.hero-glow { position: absolute; right: -10%; top: 10%; width: 60vw; height: 60vw; border-radius: 50%; background: radial-gradient(circle, rgba(0, 229, 160, 0.04) 0%, transparent 65%); pointer-events: none; }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 0.65rem 1.5rem; font-family: var(--mono); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-decoration: none; border: 1px solid transparent; transition: all 0.15s; cursor: pointer; }

.btn-filled { background: var(--accent); color: var(--bg); border-color: var(--accent); }

.btn-filled:visited { color: var(--bg); }

.btn-filled:hover { background: var(--accent-d); border-color: var(--accent-d); transform: translateY(-2px); color: var(--bg); text-decoration: none; }

.btn-outline { background: transparent; color: var(--fg2); border-color: var(--border2); }

.btn-outline:visited { color: var(--fg2); }

.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); text-decoration: none; }

/* ── SECTION BASE ── */
.section { padding: 96px var(--px); border-top: 1px solid var(--border2); }

.sec-head { display: flex; align-items: center; gap: 20px; margin-bottom: 56px; }

.sec-tag { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-border); background: var(--accent-bg); padding: 0.22rem 0.65rem; flex-shrink: 0; }

.sec-rule { flex: 0 0 48px; height: 1px; background: var(--border2); }

.sec-title { font-family: var(--grotesk); font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; letter-spacing: -0.035em; color: var(--fg); line-height: 1.1; margin: 0; }

/* ── ABOUT ── */
#about .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }

.about-copy p { font-size: 0.9rem; color: var(--fg2); line-height: 1.9; margin-bottom: 16px; }

.about-copy p:last-child { margin-bottom: 0; }

.edu-list { margin-top: 32px; display: flex; flex-direction: column; }

.edu-item { display: grid; grid-template-columns: 56px 1fr; gap: 0 20px; padding: 16px 0; border-bottom: 1px solid var(--border); }

.edu-item:first-child { border-top: 1px solid var(--border); }

.edu-year { font-family: var(--mono); font-size: 0.62rem; color: var(--fg3); letter-spacing: 0.06em; padding-top: 3px; line-height: 1.4; }

.edu-school { font-size: 0.88rem; font-weight: 600; color: var(--fg); margin-bottom: 2px; }

.edu-detail { font-size: 0.78rem; color: var(--fg2); line-height: 1.5; }

/* ── SKILLS TERMINAL ── */
.skills-panel { background: var(--bg2); border: 1px solid var(--border2); overflow: hidden; }

.sp-bar { display: flex; align-items: center; padding: 10px 16px; background: var(--border2); gap: 8px; }

.sp-dot { width: 10px; height: 10px; border-radius: 50%; }

.sp-dot:nth-child(1) { background: #ff5f57; }

.sp-dot:nth-child(2) { background: #febc2e; }

.sp-dot:nth-child(3) { background: #28c840; }

.sp-title { font-family: var(--mono); font-size: 0.62rem; color: var(--fg2); margin-left: auto; letter-spacing: 0.06em; }

.sp-body { padding: 24px; font-family: var(--mono); font-size: 0.75rem; display: flex; flex-direction: column; gap: 4px; line-height: 1.9; }

.sp-line { display: flex; gap: 10px; }

.sp-prompt { color: var(--accent); user-select: none; flex-shrink: 0; }

.sp-cmd { color: var(--fg); }

.sp-output { color: var(--fg2); padding-left: 22px; display: flex; flex-wrap: wrap; gap: 6px; }

.sp-chip { font-size: 0.65rem; background: var(--accent-bg); color: var(--accent); border: 1px solid var(--accent-border); padding: 1px 7px; letter-spacing: 0.04em; }

.sp-gap { height: 8px; }

/* ── PROJECTS ── */
#projects .proj-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border2); }

.proj-card { background: var(--bg2); padding: 36px; display: flex; flex-direction: column; gap: 0; text-decoration: none; color: inherit; transition: background 0.2s; position: relative; overflow: hidden; min-height: 280px; }

.proj-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }

.proj-card:hover { background: var(--bg3); text-decoration: none; }

.proj-card:hover::before { transform: scaleX(1); }

.proj-card:visited { color: inherit; }

.proj-card-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }

.proj-id { font-family: var(--mono); font-size: 0.6rem; color: var(--fg3); letter-spacing: 0.14em; }

.proj-badge { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.12em; color: var(--accent); border: 1px solid var(--accent-border); background: var(--accent-bg); padding: 0.15rem 0.45rem; }

.proj-title { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.025em; color: var(--fg); line-height: 1.25; margin-bottom: 10px; margin-top: 0; }

.proj-desc { font-size: 0.82rem; color: var(--fg2); line-height: 1.75; flex: 1; margin-bottom: 20px; }

.proj-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.ptag { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.08em; color: var(--accent); background: var(--accent-bg); border: 1px solid var(--accent-border); padding: 0.15rem 0.5rem; }

.proj-arrow { position: absolute; bottom: 28px; right: 28px; font-size: 1rem; color: var(--border2); transition: color 0.2s, transform 0.2s; font-family: var(--mono); }

.proj-card:hover .proj-arrow { color: var(--accent); transform: translate(3px, -3px); }

/* ── EXPERIENCE ── */
#experience .exp-list { display: flex; flex-direction: column; }

.exp-item { display: grid; grid-template-columns: 220px 1fr; gap: 0 40px; padding: 32px 0; border-bottom: 1px solid var(--border); }

.exp-item:last-child { border-bottom: none; }

.exp-meta { display: flex; flex-direction: column; gap: 6px; padding-top: 2px; }

.exp-period { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--accent); }

.exp-org { font-family: var(--mono); font-size: 0.68rem; color: var(--fg2); letter-spacing: 0.04em; }

.exp-loc { font-family: var(--mono); font-size: 0.6rem; color: var(--fg3); letter-spacing: 0.04em; }

.exp-role { font-size: 1rem; font-weight: 700; letter-spacing: -0.02em; color: var(--fg); margin-bottom: 10px; margin-top: 0; line-height: 1.2; }

.exp-body { font-size: 0.82rem; color: var(--fg2); line-height: 1.8; margin: 0; }

.exp-body ul { padding-left: 18px; }

.exp-body li { margin-bottom: 5px; }

/* ── AWARDS ── */
#awards .awards-list { display: flex; flex-direction: column; }

.award-item { display: grid; grid-template-columns: 100px 1fr; gap: 0 40px; padding: 28px 0; border-bottom: 1px solid var(--border); align-items: start; }

.award-item:last-child { border-bottom: none; }

.award-tier { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.14em; text-transform: uppercase; padding: 0.28rem 0; border-top: 2px solid; text-align: left; margin-top: 3px; }

.award-tier.gold { color: #f5c842; border-color: #f5c842; }

.award-tier.bronze { color: #d4915a; border-color: #d4915a; }

.award-tier.academic { color: var(--accent); border-color: var(--accent); }

.award-tier.industry { color: var(--fg2); border-color: var(--fg3); }

.award-body-title { font-size: 0.95rem; font-weight: 600; color: var(--fg); margin-bottom: 3px; margin-top: 0; letter-spacing: -0.01em; }

.award-body-org { font-family: var(--mono); font-size: 0.65rem; color: var(--fg3); letter-spacing: 0.04em; margin-bottom: 8px; }

.award-body-desc { font-size: 0.8rem; color: var(--fg2); line-height: 1.7; margin: 0; }

/* ── CONTACT ── */
#contact .contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }

.contact-headline { font-family: var(--grotesk); font-size: clamp(2.4rem, 5vw, 4.5rem); font-weight: 700; letter-spacing: -0.05em; line-height: 0.95; color: var(--fg); margin-bottom: 24px; margin-top: 0; }

.contact-headline .acc { color: var(--accent); }

.contact-note { font-size: 0.85rem; color: var(--fg2); line-height: 1.85; max-width: 320px; margin: 0; }

.contact-links { display: flex; flex-direction: column; }

.clink { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--border); text-decoration: none; color: var(--fg2); font-size: 0.82rem; transition: color 0.15s, padding-left 0.2s; cursor: pointer; }

.clink:visited { color: var(--fg2); }

.clink:hover { color: var(--accent); padding-left: 8px; text-decoration: none; }

.clink-type { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg3); width: 64px; flex-shrink: 0; transition: color 0.15s; }

.clink:hover .clink-type { color: var(--accent); }

.clink-arr { font-family: var(--mono); font-size: 0.8rem; }

/* ── FOOTER ── */
footer { padding: 20px var(--px); border-top: 1px solid var(--border2); display: flex; justify-content: space-between; align-items: center; }

.foot-copy { font-family: var(--mono); font-size: 0.62rem; color: var(--fg3); letter-spacing: 0.08em; }

.foot-tag { font-family: var(--mono); font-size: 0.62rem; color: var(--border2); letter-spacing: 0.06em; }

/* ── PROJECT PAGES ── */
.proj-page-hero { padding: 96px var(--px) 64px; border-bottom: 1px solid var(--border2); }

.proj-breadcrumb { font-family: var(--mono); font-size: 0.62rem; color: var(--fg3); letter-spacing: 0.12em; margin-bottom: 24px; }

.proj-breadcrumb a { color: var(--accent); text-decoration: none; }

.proj-breadcrumb a:hover { text-decoration: underline; }

.proj-page-kicker { font-family: var(--mono); font-size: 0.68rem; color: var(--accent); letter-spacing: 0.14em; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }

.proj-page-kicker::before { content: '>'; color: var(--fg3); }

.proj-page-title { font-family: var(--grotesk); font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 700; letter-spacing: -0.045em; line-height: 0.9; color: var(--fg); margin-bottom: 32px; margin-top: 0; }

.proj-meta-row { display: flex; gap: 32px; margin-bottom: 32px; flex-wrap: wrap; }

.meta-item { display: flex; flex-direction: column; gap: 4px; }

.meta-label { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg3); }

.meta-val { font-family: var(--mono); font-size: 0.78rem; color: var(--fg); }

.proj-summary { font-size: 1rem; color: var(--fg2); line-height: 1.85; max-width: 640px; }

.proj-page-content { padding: 64px var(--px) 96px; max-width: calc(800px + 2 * var(--px)); }

.proj-page-content h2 { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; color: var(--fg); margin-top: 48px; margin-bottom: 16px; font-family: var(--grotesk); display: flex; align-items: center; gap: 12px; }

.proj-page-content h2::before { content: '//'; font-family: var(--mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.04em; }

.proj-page-content h1 { display: none; }

.proj-page-content p { font-size: 0.88rem; color: var(--fg2); line-height: 1.9; margin-bottom: 16px; }

.proj-page-content ul { padding-left: 20px; margin-bottom: 16px; }

.proj-page-content li { font-size: 0.88rem; color: var(--fg2); line-height: 1.85; margin-bottom: 6px; }

.proj-page-content strong { color: var(--fg); font-weight: 600; }

.proj-page-content code { font-family: var(--mono); font-size: 0.8rem; background: var(--bg2); border: 1px solid var(--border2); padding: 0.15rem 0.4rem; color: var(--accent); }

.proj-page-content pre { background: var(--bg2); border: 1px solid var(--border2); padding: 20px; overflow-x: auto; margin-bottom: 20px; }

.proj-page-content pre code { background: none; border: none; padding: 0; font-size: 0.8rem; color: var(--fg2); }

/* ── SCROLL REVEAL ── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }

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

/* ── ANIMATIONS ── */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ── MOBILE ── */
@media screen and (max-width: 768px) {
  /* Nav: logo left, links scroll horizontally on one row */
  #nav { padding: 0 16px; height: 56px; gap: 0; --px: 16px; }
  .nav-links { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; scrollbar-width: none; flex-shrink: 1; min-width: 0; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { white-space: nowrap; font-size: 0.68rem; padding: 0.3rem 0.7rem; }
  .nav-cv { margin-left: 8px !important; }
  .nav-logo { font-size: 0.7rem; white-space: nowrap; flex-shrink: 0; margin-right: 8px; }

  /* Hero */
  #hero { padding: 80px 20px 56px; --px: 20px; }
  .hero-name { font-size: clamp(3rem, 14vw, 5rem); }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .hstat-val { font-size: 1.6rem; }
  .hero-ctas { flex-direction: column; align-items: flex-start; gap: 8px; }
  .hero-glow { display: none; }

  /* Sections */
  .section { padding: 56px 20px; --px: 20px; }
  .sec-head { margin-bottom: 36px; gap: 12px; }
  .sec-rule { flex: 0 0 24px; }

  /* About */
  #about .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .sp-body { padding: 16px; font-size: 0.7rem; }
  .sp-chip { font-size: 0.62rem; }

  /* Projects */
  #projects .proj-grid { grid-template-columns: 1fr; }
  .proj-card { padding: 24px; min-height: auto; }
  .proj-arrow { bottom: 20px; right: 20px; }

  /* Experience */
  .exp-item { grid-template-columns: 1fr; gap: 10px; padding: 24px 0; }
  .exp-meta { padding-top: 0; flex-direction: row; flex-wrap: wrap; gap: 4px 16px; }
  .exp-period { width: 100%; }

  /* Awards */
  .award-item { grid-template-columns: 72px 1fr; gap: 0 16px; padding: 20px 0; }

  /* Contact */
  #contact .contact-wrap { grid-template-columns: 1fr; gap: 36px; }
  .contact-headline { font-size: clamp(2rem, 10vw, 3.5rem); }

  /* Footer */
  footer { padding: 16px 20px; flex-direction: column; gap: 4px; text-align: center; --px: 20px; }

  /* Project pages */
  .proj-page-hero { padding: 76px 20px 40px; --px: 20px; }
  .proj-page-title { font-size: clamp(2rem, 8vw, 3.5rem); }
  .proj-page-content { padding: 40px 20px 64px; --px: 20px; }
  .proj-meta-row { gap: 20px; }
}