/* ============================================================
   ZUBER AMIN — aminoo.dev
   Design system: a portfolio built like a trace, not a template.
   ============================================================ */

:root {
  /* Color */
  --bg: #0A0C10;
  --bg-elev: #12151B;
  --bg-elev-2: #171B23;
  --border: #1E222B;
  --border-soft: rgba(255,255,255,0.06);
  --text: #E7E9EE;
  --text-dim: #8891A3;
  --text-faint: #565C6B;
  --accent: #E8A33D;
  --accent-soft: rgba(232,163,61,0.14);
  --accent-2: #4FD1C5;
  --accent-2-soft: rgba(79,209,197,0.14);

  /* Type */
  --display: 'Fraunces', ui-serif, Georgia, serif;
  --body: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Layout */
  --maxw: 1180px;
  --radius: 10px;
  --gutter-w: 44px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
code { font-family: var(--mono); background: var(--bg-elev-2); padding: 0.1em 0.4em; border-radius: 4px; font-size: 0.9em; color: var(--accent-2); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #14100a; padding: 10px 16px;
  z-index: 999; border-radius: 0 0 8px 0; font-family: var(--mono); font-size: 0.85rem;
}
.skip-link:focus { left: 0; }

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

.section-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--delay, 0ms);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,12,16,0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 28px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; display: grid; place-items: center;
  border: 1px solid var(--accent); border-radius: 6px;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 600; color: var(--accent);
  letter-spacing: 0.5px;
}
.brand-word {
  font-family: var(--mono); font-size: 0.95rem; font-weight: 500; color: var(--text); letter-spacing: 0.2px;
}
.brand-cursor { color: var(--text-dim); }
.brand-cursor::after {
  content: '▌'; color: var(--accent); margin-left: 2px; animation: blink 1.1s steps(1) infinite;
}
@media (prefers-reduced-motion: reduce) { .brand-cursor::after { animation: none; } }
@keyframes blink { 0%, 45% { opacity: 1; } 50%, 100% { opacity: 0; } }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  text-decoration: none; color: var(--text-dim); font-size: 0.92rem; font-weight: 500;
  transition: color 0.2s ease; position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -8px; height: 2px; background: var(--accent);
}
.nav-cta {
  border: 1px solid var(--border); padding: 8px 16px; border-radius: 8px; color: var(--text) !important;
}
.nav-cta:hover, .nav-cta.active { border-color: var(--accent); color: var(--accent) !important; }
.nav-cta.active::after { display: none; }

.mobile-nav a.active { color: var(--accent); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); border-radius: 8px;
  width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--text); transition: transform 0.25s ease, opacity 0.25s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none; flex-direction: column; padding: 8px 28px 24px;
  border-top: 1px solid var(--border-soft);
}
.mobile-nav a {
  text-decoration: none; color: var(--text); font-family: var(--mono); font-size: 1rem;
  padding: 14px 0; border-bottom: 1px solid var(--border-soft);
}
.mobile-nav.open { display: flex; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

/* ============================================================
   ROUTE BAR — the compile-progress sweep on page navigation
   ============================================================ */
.route-bar {
  position: fixed; top: 0; left: 0; height: 2.5px; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 300; opacity: 0;
  transition: width 0.35s ease, opacity 0.25s ease;
}

/* ============================================================
   PAGES — one visible at a time, swapped by router.js
   ============================================================ */
.page { display: none; }
.page.active { display: block; }

/* ============================================================
   HOME TEASERS
   ============================================================ */
.home-teasers { padding-top: 88px; }
.teaser-grid {
  margin-top: 30px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
@media (max-width: 900px) { .teaser-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .teaser-grid { grid-template-columns: 1fr; } }

.teaser-card {
  background: var(--bg-elev); padding: 28px 24px; text-decoration: none; color: var(--text);
  display: flex; flex-direction: column; gap: 10px; transition: background 0.2s ease;
}
.teaser-card:hover { background: var(--bg-elev-2); }
.teaser-card:hover .teaser-link { color: var(--accent); }
.teaser-index { font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim); }
.teaser-card h3 { font-family: var(--display); font-size: 1.3rem; font-weight: 500; margin-top: 2px; }
.teaser-card p { color: var(--text-dim); font-size: 0.92rem; line-height: 1.55; flex: 1; }
.teaser-link { font-family: var(--mono); font-size: 0.8rem; color: var(--text-dim); transition: color 0.18s ease; }

.home-cta { padding-top: 64px; padding-bottom: 100px; }
.home-cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  border-top: 1px solid var(--border-soft); padding-top: 48px;
}
.home-cta-inner h2 {
  font-family: var(--display); font-weight: 500; font-size: clamp(1.8rem, 4vw, 2.5rem); margin-top: 8px;
}

/* ============================================================
   HERO 3D — the system-graph panel
   ============================================================ */
.hero-3d {
  position: relative; margin: 56px 0 72px; height: clamp(220px, 28vw, 300px);
  border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
  background: radial-gradient(120% 140% at 50% 0%, rgba(232,163,61,0.06), transparent 60%), var(--bg-elev);
}
.hero-3d-fallback {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(232,163,61,0.35) 1px, transparent 1px);
  background-size: 26px 26px; opacity: 0.5;
}
.trace-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-3d-caption {
  position: absolute; left: 16px; bottom: 12px; right: 16px; z-index: 2;
  font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim); max-width: 60ch;
  text-shadow: 0 1px 6px rgba(10,12,16,0.8);
}

/* ============================================================
   GUTTER — the code-editor line-number margin, hero only
   ============================================================ */
.gutter {
  position: absolute; left: 0; top: 0; bottom: 0; width: var(--gutter-w);
  display: flex; flex-direction: column; justify-content: space-evenly; align-items: center;
  border-right: 1px solid var(--border-soft);
  font-family: var(--mono); font-size: 0.7rem; color: var(--text-faint);
  padding: 100px 0 40px;
}
@media (max-width: 760px) { .gutter { display: none; } }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: 64px 28px 0;
  padding-left: calc(var(--gutter-w) + 28px);
  max-width: var(--maxw); margin: 0 auto;
}
@media (max-width: 760px) { .hero { padding-left: 20px; padding-right: 20px; } }

.hero-inner {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center;
  padding-top: 28px;
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; max-width: 300px; margin: 0 auto; }
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.78rem; color: var(--text-dim);
  letter-spacing: 0.3px; margin-bottom: 22px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.hero-name {
  font-family: var(--display); font-weight: 500; font-size: clamp(3.1rem, 8vw, 6.2rem);
  line-height: 0.98; letter-spacing: -0.01em; margin: 0 0 18px;
}
.hero-title {
  font-family: var(--mono); font-size: clamp(1rem, 2vw, 1.15rem); color: var(--accent);
  margin-bottom: 22px; letter-spacing: 0.2px;
}
.hero-line {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: var(--text-dim); max-width: 46ch; line-height: 1.55;
  margin-bottom: 34px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 8px; font-weight: 600; font-size: 0.95rem;
  text-decoration: none; transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.btn-primary { background: var(--accent); color: #17110a; }
.btn-primary:hover { transform: translateY(-2px); background: #f0b256; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* Portrait */
.portrait-frame {
  position: relative; aspect-ratio: 2 / 3; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elev);
}
.portrait-img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(0.55) contrast(1.08) brightness(0.92);
  mix-blend-mode: normal;
}
.portrait-grid {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background-image:
    linear-gradient(180deg, rgba(10,12,16,0.05) 0%, rgba(10,12,16,0.55) 100%),
    linear-gradient(to right, rgba(232,163,61,0.08) 1px, transparent 1px);
  background-size: 100% 100%, 24px 100%;
}
.portrait-tag {
  position: absolute; left: 14px; bottom: 14px; z-index: 3;
  background: rgba(10,12,16,0.72); backdrop-filter: blur(6px);
  border: 1px solid var(--border-soft); border-radius: 100px;
  padding: 7px 13px; font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim);
  display: flex; align-items: center; gap: 7px;
}
.tag-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); }

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section { padding: 108px 0; }
@media (max-width: 700px) { .section { padding: 76px 0; } }

.kicker { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); margin-bottom: 14px; letter-spacing: 0.3px; }
.section-head h2 {
  font-family: var(--display); font-weight: 500; font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.15; letter-spacing: -0.01em; max-width: 18ch;
}
.section-sub { color: var(--text-dim); font-size: 1.05rem; max-width: 56ch; margin-top: 18px; line-height: 1.6; }

/* About */
.about-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 60px; }
@media (max-width: 800px) { .about-grid { grid-template-columns: 1fr; gap: 28px; } }
.about-body p { color: var(--text-dim); font-size: 1.08rem; line-height: 1.75; margin-bottom: 20px; max-width: 62ch; }
.about-body p:last-child { color: var(--text); margin-bottom: 0; }

/* ============================================================
   TRACE PANEL (How I Think / Case study)
   ============================================================ */
.trace-panel { margin-top: 48px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.frame { border-bottom: 1px solid var(--border); background: var(--bg); }
.frame:last-child { border-bottom: none; }

.frame summary {
  list-style: none; cursor: pointer; padding: 20px 24px;
  display: flex; align-items: center; gap: 16px;
  font-family: var(--mono); font-size: 0.95rem;
  transition: background 0.18s ease;
}
.frame summary::-webkit-details-marker { display: none; }
.frame summary:hover { background: var(--accent-soft); }
.frame[open] summary { color: var(--accent); }

.frame-index {
  font-size: 0.78rem; color: var(--text-dim); width: 22px; flex-shrink: 0;
}
.frame[open] .frame-index { color: var(--accent); }
.frame-name { flex: 1; font-weight: 500; letter-spacing: 0.3px; text-transform: lowercase; }
.frame-tag {
  font-size: 0.7rem; color: var(--text-dim); border: 1px solid var(--border); border-radius: 100px;
  padding: 3px 10px; white-space: nowrap;
}
.frame p, .frame ul {
  padding: 0 24px 24px calc(24px + 22px + 16px);
  color: var(--text-dim); font-size: 1rem; line-height: 1.7; max-width: 70ch;
}
.frame .case-list { padding-left: calc(24px + 22px + 16px); margin-top: 12px; }
.frame .case-list li { margin-bottom: 14px; padding: 0; }
.frame .case-list li:last-child { margin-bottom: 0; }
@media (max-width: 600px) {
  .frame summary { padding: 16px; gap: 10px; }
  .frame p, .frame .case-list { padding-left: 16px; padding-right: 16px; }
  .frame-tag { display: none; }
}

/* Philosophy */
.philosophy { text-align: center; }
.tagline {
  font-family: var(--display); font-style: italic; font-weight: 500;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem); color: var(--text); max-width: 20ch; margin: 0 auto 56px;
}
.philosophy-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  max-width: 820px; margin: 0 auto; text-align: left;
}
.philosophy-grid p {
  background: var(--bg-elev); padding: 26px 28px; font-family: var(--mono); font-size: 0.92rem; color: var(--text-dim);
}
.philosophy-grid span { color: var(--accent-2); margin-right: 6px; }
@media (max-width: 620px) { .philosophy-grid { grid-template-columns: 1fr; } }

/* Case study */
.case-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.chip {
  border: 1px solid var(--border); border-radius: 100px; padding: 7px 15px;
  font-size: 0.85rem; color: var(--text-dim);
}
.chip-mono { font-family: var(--mono); font-size: 0.78rem; }
.case-trace { margin-top: 32px; }

/* Demo widget */
.demo-block { margin-top: 56px; }
.demo-caption { font-family: var(--mono); font-size: 0.76rem; color: var(--text-dim); margin-bottom: 16px; max-width: 70ch; }
.demo {
  display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: start;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
  background: var(--bg-elev);
}
@media (max-width: 640px) { .demo { grid-template-columns: 1fr; } }

.demo-switch { display: flex; flex-direction: column; gap: 8px; min-width: 150px; }
.demo-switch button {
  font-family: var(--mono); font-size: 0.82rem; text-align: left;
  background: none; border: 1px solid var(--border); border-radius: 7px; color: var(--text-dim);
  padding: 10px 14px; cursor: pointer; transition: border-color 0.18s ease, color 0.18s ease;
}
.demo-switch button:hover { color: var(--text); }
.demo-switch button[aria-selected="true"] { border-color: var(--accent); color: var(--accent); }

.demo-card {
  border-radius: 10px; padding: 26px; transition: background 0.3s ease, color 0.3s ease;
  background: var(--demo-bg, #161B22); color: var(--demo-text, #E6EDF3);
  border: 1px solid var(--border-soft);
}
.demo-card-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.demo-card-photo {
  width: 46px; height: 46px; border-radius: 50%; flex-shrink: 0;
  background: var(--demo-accent, #2979FF);
}
.demo-card-name { font-family: var(--demo-heading-font, 'Inter'), var(--body); font-weight: 700; font-size: 1.1rem; }
.demo-card-role { font-size: 0.85rem; opacity: 0.75; margin-top: 2px; }
.demo-card-label {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1.2px; opacity: 0.6; margin-bottom: 12px;
}
.demo-skill { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 0.85rem; }
.demo-skill span { width: 120px; flex-shrink: 0; }
.demo-skill i {
  display: block; flex: 1; height: 6px; border-radius: 4px; background: rgba(255,255,255,0.12); position: relative; overflow: hidden;
}
.demo-skill i::after {
  content: ''; position: absolute; inset: 0; width: calc(var(--v) * 100%);
  background: var(--demo-accent, #2979FF); border-radius: 4px; transition: background 0.3s ease;
}

/* Projects grid */
.projects-grid { margin-top: 40px; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.project-card-more {
  border: 1px dashed var(--border); border-radius: var(--radius); padding: 28px;
  color: var(--text-dim);
}
.project-more-label { font-family: var(--mono); font-size: 0.76rem; color: var(--accent); margin-bottom: 10px; }
.project-card-more p:last-child { font-size: 0.92rem; line-height: 1.6; }

/* Skills */
.skills-grid {
  margin-top: 44px; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 34px;
}
.skill-group h3 {
  font-family: var(--mono); font-size: 0.82rem; color: var(--accent); text-transform: lowercase;
  letter-spacing: 0.3px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.skill-group li { color: var(--text-dim); font-size: 0.95rem; padding: 6px 0; }

/* Contact */
.contact { text-align: center; }
.contact h2 { font-family: var(--display); font-weight: 500; font-size: clamp(2.2rem, 6vw, 3.6rem); margin-top: 8px; }
.contact-lead { font-family: var(--display); font-style: italic; color: var(--accent); font-size: clamp(1.4rem, 3vw, 2rem); margin-top: 6px; }
.contact-links { margin-top: 40px; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.contact-links a {
  font-family: var(--mono); font-size: 1.05rem; text-decoration: none; color: var(--text-dim);
  border-bottom: 1px solid transparent; transition: color 0.18s ease, border-color 0.18s ease; padding-bottom: 2px;
}
.contact-links a:hover { color: var(--accent); border-color: var(--accent); }

/* Footer */
.footer { padding: 48px 0; border-top: 1px solid var(--border-soft); }
.footer-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px;
}
.footer-brand { font-size: 1.05rem; }
.footer-role { color: var(--text-dim); font-size: 0.85rem; margin-top: 4px; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { text-decoration: none; color: var(--text-dim); font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { width: 100%; color: var(--text-dim); font-size: 0.78rem; font-family: var(--mono); margin-top: 12px; }