/* ===== Tokens ===== */
:root,
:root[data-theme="dark"]{
  --bg: #08090c;
  --bg-alt: #0c0e13;
  --surface: #12141a;
  --surface-2: #171a22;
  --border: #23262f;
  --text: #eef0f4;
  --text-dim: #9aa0ac;
  --text-faint: #5c6270;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-3: #ff5c8a;
  --grad: linear-gradient(120deg, var(--accent), var(--accent-2));
  --nav-bg: rgba(8,9,12,.55);
  --nav-bg-scrolled: rgba(8,9,12,.85);
  --nav-mobile-bg: #0a0b0f;
  --code-str: #ffb86c;
  --card-shadow: rgba(0,0,0,.55);
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 16px;
  --maxw: 1120px;
}

:root[data-theme="light"]{
  --bg: #f6f5f2;
  --bg-alt: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0eee9;
  --border: #e2dfd8;
  --text: #17181c;
  --text-dim: #52565f;
  --text-faint: #858993;
  --accent: #6a45f0;
  --accent-2: #0891a8;
  --accent-3: #d63f77;
  --nav-bg: rgba(246,245,242,.7);
  --nav-bg-scrolled: rgba(246,245,242,.92);
  --nav-mobile-bg: #fffffe;
  --code-str: #a3540f;
  --card-shadow: rgba(30,30,40,.12);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-head);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background-color .25s ease, color .25s ease;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

:where(a, button):focus-visible{
  outline:2px solid var(--accent-2);outline-offset:3px;border-radius:6px;
}
section[id]{scroll-margin-top:80px;}

.skip-link{
  position:absolute;left:-999px;top:0;
  background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:999;
}
.skip-link:focus{left:16px;top:16px;}

/* ===== Background canvas + grain ===== */
#bg-canvas{
  position:fixed;inset:0;z-index:0;
  width:100%;height:100%;
  background:
    radial-gradient(60% 50% at 15% -10%, rgba(124,92,255,.25), transparent 60%),
    radial-gradient(50% 40% at 100% 0%, rgba(34,211,238,.18), transparent 60%),
    var(--bg);
}
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.035;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Nav ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:blur(14px) saturate(140%);
  background:var(--nav-bg);
  border-bottom:1px solid transparent;
  transition:border-color .3s, background .3s;
}
.nav.scrolled{border-bottom-color:var(--border);background:var(--nav-bg-scrolled);}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:16px 24px;
  display:flex;align-items:center;gap:24px;
}
.logo{font-family:var(--font-mono);font-weight:600;font-size:1.05rem;letter-spacing:.02em;margin-right:auto;}
.logo-bracket{color:var(--accent-2);}
.nav-links{display:flex;gap:28px;font-size:.92rem;color:var(--text-dim);}
.nav-links a{position:relative;padding:4px 0;transition:color .2s;}
.nav-links a:hover,.nav-links a.active{color:var(--text);}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--grad);border-radius:2px;
}
.nav-cta-group{display:flex;align-items:center;gap:10px;}
.nav-cta{font-size:.85rem;padding:9px 16px;}
.nav-cta.icon-only{padding:9px;}

.nav-toggles{display:flex;align-items:center;gap:8px;}
.toggle-btn{
  display:flex;align-items:center;justify-content:center;
  height:36px;min-width:36px;padding:0 12px;border-radius:999px;
  background:rgba(255,255,255,.03);border:1px solid var(--border);color:var(--text);
  font-family:var(--font-mono);font-size:.78rem;font-weight:600;letter-spacing:.03em;
  cursor:pointer;transition:transform .2s,border-color .2s,background .2s;
}
.toggle-btn:hover{transform:translateY(-2px);border-color:#3a3f4d;background:rgba(255,255,255,.07);}
.toggle-btn.icon-btn{padding:0;}
.icon-sun,.icon-moon{display:block;}
:root[data-theme="dark"] .icon-sun{display:none;}
:root[data-theme="light"] .icon-moon{display:none;}

.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;background:none;border:0;cursor:pointer;}
.burger span{display:block;width:100%;height:2px;background:var(--text);border-radius:2px;transition:.25s;}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:999px;font-size:.95rem;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s, box-shadow .2s, background .2s, color .2s;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#0a0a0f;box-shadow:0 8px 24px -8px rgba(124,92,255,.6);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px -8px rgba(124,92,255,.75);}
.btn-ghost{background:rgba(255,255,255,.03);color:var(--text);border-color:var(--border);}
.btn-ghost:hover{background:rgba(255,255,255,.07);border-color:#3a3f4d;transform:translateY(-2px);}

/* ===== Hero ===== */
.hero{
  position:relative;z-index:2;
  min-height:100vh;
  display:flex;align-items:center;
  padding-top:96px;padding-bottom:60px;
}
.hero-inner{max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.82rem;color:var(--text-dim);
  border:1px solid var(--border);padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.02);margin-bottom:28px;
}
.dot-live{width:7px;height:7px;border-radius:50%;background:#3ddc84;box-shadow:0 0 0 0 rgba(61,220,132,.6);animation:pulse 2s infinite;}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(61,220,132,.55);}
  70%{box-shadow:0 0 0 8px rgba(61,220,132,0);}
  100%{box-shadow:0 0 0 0 rgba(61,220,132,0);}
}
.hero-title{
  font-size:clamp(2.2rem,6vw,3.6rem);
  line-height:1.15;font-weight:700;margin:0 0 22px;letter-spacing:-.02em;
}
.grad-text{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.type-target{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-family:var(--font-mono);
}
.cursor{color:var(--accent-2);animation:blink 1s step-end infinite;font-weight:400;}
@keyframes blink{50%{opacity:0;}}
.hero-sub{font-size:1.1rem;color:var(--text-dim);max-width:560px;margin:0 0 34px;}
.hero-actions{display:flex;gap:14px;margin-bottom:34px;flex-wrap:wrap;}
.hero-meta{font-family:var(--font-mono);font-size:.85rem;color:var(--text-faint);}
.hero-meta code{color:var(--accent-2);}
.hero-meta .sep{margin:0 10px;}

.scroll-cue{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  width:26px;height:42px;border:2px solid var(--border);border-radius:14px;
}
.scroll-cue span{
  display:block;width:4px;height:8px;background:var(--accent-2);border-radius:2px;
  margin:6px auto 0;animation:scrollcue 1.8s infinite;
}
@keyframes scrollcue{
  0%{transform:translateY(0);opacity:1;}
  70%{transform:translateY(14px);opacity:0;}
  100%{opacity:0;}
}

/* ===== fade-up entrance ===== */
.fade-up{opacity:0;transform:translateY(18px);animation:fadeUp .7s ease forwards;}
.hero-title.fade-up{animation-delay:.05s;}
.hero-sub.fade-up{animation-delay:.15s;}
.hero-actions.fade-up{animation-delay:.25s;}
.hero-meta.fade-up{animation-delay:.35s;}
@keyframes fadeUp{to{opacity:1;transform:translateY(0);}}

/* ===== Sections ===== */
.section{position:relative;z-index:2;padding:110px 0;}
.section.alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.015),transparent);}
.section-title{
  font-size:clamp(1.6rem,3vw,2.2rem);margin:0 0 8px;font-weight:700;letter-spacing:-.01em;
  display:flex;align-items:baseline;gap:14px;
}
.idx{font-family:var(--font-mono);font-size:.9rem;color:var(--accent-2);font-weight:500;}
.section-sub{color:var(--text-dim);margin:0 0 44px;font-size:.98rem;}
.section-sub a{color:var(--accent-2);border-bottom:1px solid rgba(34,211,238,.35);}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start;margin-top:44px;}
.about-text,.about-card{min-width:0;}
.about-text p{color:var(--text-dim);margin:0 0 18px;}
.about-text strong{color:var(--text);}
.about-facts{list-style:none;margin:28px 0 0;padding:0;display:flex;flex-direction:column;gap:12px;}
.about-facts li{display:flex;gap:10px;color:var(--text-dim);font-size:.95rem;}

.terminal{
  max-width:100%;
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  background:var(--surface);box-shadow:0 30px 60px -30px var(--card-shadow);
}
.terminal-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--surface-2);border-bottom:1px solid var(--border);}
.tdot{width:10px;height:10px;border-radius:50%;}
.tdot.r{background:#ff5f57;}.tdot.y{background:#febc2e;}.tdot.g{background:#28c840;}
.terminal-title{margin-left:8px;font-family:var(--font-mono);font-size:.78rem;color:var(--text-faint);}
.terminal-body{
  margin:0;padding:22px 20px;font-family:var(--font-mono);font-size:.88rem;line-height:1.75;
  color:var(--text-dim);overflow-x:auto;max-width:100%;
}
.c-comment{color:var(--text-faint);}
.c-key{color:var(--accent-2);}
.c-str{color:var(--code-str);}
.c-blink{color:#3ddc84;animation:blink 1.2s step-end infinite;}

/* ===== Skills ===== */
.skills-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr));gap:20px;margin-top:44px;
}
.skill-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;transition:transform .25s,border-color .25s,background .25s;
}
.skill-card:hover{transform:translateY(-4px);border-color:#3a3f4d;background:var(--surface-2);}
.skill-icon{font-size:1.8rem;margin-bottom:14px;}
.skill-card h3{margin:0 0 8px;font-size:1.05rem;}
.skill-card p{margin:0;color:var(--text-dim);font-size:.9rem;}

/* ===== Projects ===== */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:22px;}
.project-card{
  position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;display:flex;flex-direction:column;gap:14px;transition:transform .25s,border-color .25s,box-shadow .25s;
  min-height:210px;
}
.project-card:hover{transform:translateY(-5px);border-color:#3a3f4d;box-shadow:0 24px 48px -24px rgba(124,92,255,.35);}
.project-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;}
.project-name{font-family:var(--font-mono);font-size:1.05rem;font-weight:600;color:var(--text);word-break:break-word;}
.project-lang{
  font-size:.72rem;font-family:var(--font-mono);padding:4px 10px;border-radius:999px;
  border:1px solid var(--border);color:var(--text-dim);white-space:nowrap;flex-shrink:0;
}
.project-desc{color:var(--text-dim);font-size:.9rem;flex:1;margin:0;}
.project-meta{display:flex;gap:16px;font-size:.8rem;color:var(--text-faint);font-family:var(--font-mono);}
.project-meta span{display:flex;align-items:center;gap:5px;}
.project-link{
  position:absolute;inset:0;border-radius:var(--radius);
}
.skeleton{
  background:linear-gradient(100deg,var(--surface) 30%,var(--surface-2) 50%,var(--surface) 70%);
  background-size:200% 100%;animation:shimmer 1.4s infinite;
}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* ===== Education ===== */
.edu-card{
  display:flex;gap:34px;align-items:flex-start;margin-top:44px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:38px 36px;position:relative;overflow:hidden;
}
.edu-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);
}
.edu-emblem{
  flex-shrink:0;width:104px;height:104px;border-radius:20px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(124,92,255,.16),rgba(34,211,238,.12));
  border:1px solid var(--border);
}
.edu-emblem span{
  font-family:var(--font-mono);font-size:1.55rem;font-weight:700;letter-spacing:.06em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.edu-body{min-width:0;}
.edu-degree{
  margin:0 0 6px;font-family:var(--font-mono);font-size:.8rem;letter-spacing:.06em;
  text-transform:uppercase;color:var(--accent-2);
}
.edu-university{margin:0 0 14px;font-size:1.45rem;font-weight:700;letter-spacing:-.01em;line-height:1.25;}
.edu-note{margin:0 0 22px;color:var(--text-dim);font-size:.95rem;max-width:620px;}
.edu-meta{display:flex;flex-wrap:wrap;gap:10px;}
.edu-chip{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;color:var(--text-dim);
  border:1px solid var(--border);border-radius:999px;padding:7px 15px;
  background:rgba(255,255,255,.02);
}
.edu-chip.is-live{color:var(--text);}

/* ===== Contact ===== */
.contact-card{
  background:linear-gradient(160deg,var(--surface),var(--surface-2));
  border:1px solid var(--border);border-radius:24px;padding:56px 40px;text-align:center;margin-top:36px;
}
.contact-lead{font-size:1.15rem;color:var(--text-dim);max-width:520px;margin:0 auto 32px;}
.contact-links{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}
.contact-link{
  display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;
  border:1px solid var(--border);background:rgba(255,255,255,.02);font-size:.95rem;
  transition:transform .2s,border-color .2s,background .2s;
  max-width:100%;overflow-wrap:anywhere;
}
.contact-link:hover{transform:translateY(-3px);border-color:var(--accent-2);background:rgba(34,211,238,.06);}
.ci{font-size:1.1rem;}

/* ===== Footer ===== */
.footer{position:relative;z-index:2;border-top:1px solid var(--border);padding:28px 0 40px;}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.85rem;color:var(--text-faint);}

/* ===== Responsive ===== */
@media (max-width:860px){
  .about-grid{grid-template-columns:1fr;}
  .nav-inner{padding:14px 18px;gap:12px;}
  .nav-links{
    position:fixed;top:63px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--nav-mobile-bg);border-bottom:1px solid var(--border);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
    max-width:100%;
  }
  .nav-links.open{max-height:70vh;overflow-y:auto;}
  .nav-links a{padding:16px 24px;border-bottom:1px solid var(--border);}
  .nav-cta{display:none;}
  .burger{display:flex;flex-shrink:0;}
  .nav-toggles{flex-shrink:0;}
}
@media (max-width:640px){
  .section{padding:76px 0;}
  .hero-actions{width:100%;}
  .hero-actions .btn{flex:1;justify-content:center;}
}
@media (max-width:640px){
  .edu-card{flex-direction:column;gap:24px;padding:30px 24px;}
  .edu-emblem{width:78px;height:78px;border-radius:16px;}
  .edu-emblem span{font-size:1.2rem;}
  .edu-university{font-size:1.25rem;}
}
@media (max-width:520px){
  .contact-card{padding:40px 22px;}
  .hero{padding-top:110px;padding-bottom:40px;}
  .contact-links{flex-direction:column;align-items:stretch;}
  .contact-link{justify-content:center;}
}
@media (max-width:380px){
  .nav-inner{gap:8px;}
  .logo{font-size:.92rem;}
  .toggle-btn{min-width:32px;height:32px;padding:0 8px;font-size:.72rem;}
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}