/* Components — nav, hero, cards, projects, contact, footer */
/* Part of Jowie Tan's site — see CLAUDE.md for structure notes. */

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex; align-items: center;
  transition: background 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.logo { display: flex; align-items: center; gap: 0; }
.logo svg { height: 30px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  font-size: 14.5px; font-weight: 500; color: var(--text-dim);
  padding: 9px 14px; border-radius: 10px; position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-card); }
.nav-links a.ext svg { width: 16px; height: 16px; }

.nav-right { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 42px; height: 42px; border-radius: 11px;
  border: 1px solid var(--border);
  display: grid; place-items: center;
  background: var(--bg-card);
  transition: border-color 0.25s, transform 0.25s, background 0.4s;
}
.theme-toggle:hover { border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle svg { width: 19px; height: 19px; stroke: var(--text); }
.theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: none; }

.cta-nav {
  font-size: 14px; font-weight: 600; padding: 10px 18px;
  border-radius: 11px; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px -8px var(--accent-glow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta-nav:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -8px var(--accent-glow); }

.hamburger { display: none; width: 44px; height: 44px; border-radius: 11px; border: 1px solid var(--border); background: var(--bg-card); }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--text); margin: 3px auto; border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.hamburger.open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Mobile drawer */
.drawer-backdrop {
  position: fixed; inset: 0; z-index: 98;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none; transition: opacity 0.35s;
}
.drawer-backdrop.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 99;
  width: min(82vw, 340px);
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.22,1,0.36,1);
  padding: calc(var(--nav-h) + 18px) 26px 40px;
  display: flex; flex-direction: column; gap: 6px;
}
.drawer.open { transform: translateX(0); }
.drawer a {
  font-family: var(--font-display); font-size: 19px; font-weight: 500;
  padding: 14px 4px; color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
  transition: color 0.2s, padding-left 0.2s;
}
.drawer a:hover { color: var(--accent-3); padding-left: 10px; }
.drawer a svg { width: 18px; height: 18px; }
.drawer .drawer-foot { margin-top: auto; font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero-veil {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(120% 90% at 75% 10%, transparent 35%, var(--bg) 92%),
    linear-gradient(180deg, transparent 55%, var(--bg) 100%);
}
.hero .wrap { position: relative; z-index: 2; width: 100%; }
.hero-inner { max-width: 760px; }
.hero h1 {
  font-size: clamp(40px, 7vw, 82px);
  font-weight: 700;
  margin: 22px 0 0;
  letter-spacing: -0.035em;
}
.hero h1 .grad {
  background: linear-gradient(105deg, var(--accent-3), var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-roles {
  display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 18px;
}
.hero-roles span {
  font-family: var(--font-mono); font-size: 13px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg-card) 60%, transparent);
  color: var(--text-dim);
  backdrop-filter: blur(6px);
}
.hero p.lede {
  font-size: clamp(16px, 2vw, 19px); color: var(--text-dim);
  max-width: 560px; margin-bottom: 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  font-size: 15px; font-weight: 600; padding: 14px 26px; border-radius: 13px;
  display: inline-flex; align-items: center; gap: 10px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.3s;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 14px 36px -12px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -12px var(--accent-glow); }
.btn-ghost { border: 1px solid var(--border-strong); color: var(--text); background: color-mix(in srgb, var(--bg-card) 50%, transparent); }
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-2px); }

.hero-scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em; color: var(--text-faint);
}
.hero-scroll .mouse { width: 22px; height: 36px; border: 1.5px solid var(--border-strong); border-radius: 12px; position: relative; }
.hero-scroll .mouse::after { content:""; position:absolute; top:7px; left:50%; transform:translateX(-50%); width:3px; height:7px; border-radius:2px; background: var(--accent-3); animation: scrolldot 1.6s infinite; }
@keyframes scrolldot { 0%{opacity:0; transform:translate(-50%,0);} 30%{opacity:1;} 70%{opacity:1; transform:translate(-50%,9px);} 100%{opacity:0; transform:translate(-50%,12px);} }

/* ============================================================
   EXPERIENCE / FEATURE GRID
   ============================================================ */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.feat-card {
  grid-column: span 2;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-card-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  position: relative; overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.22,1,0.36,1), border-color 0.35s, box-shadow 0.4s;
}
.feat-card::after {
  content:""; position:absolute; top:0; left:0; right:0; height:1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0; transition: opacity 0.4s;
}
.feat-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.feat-card:hover::after { opacity: 1; }
.feat-card .ic {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 20px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.feat-card .ic svg { width: 28px; height: 28px; }
.feat-card .tag { font-family: var(--font-mono); font-size: 11px; color: var(--accent-3); letter-spacing: 0.12em; text-transform: uppercase; }
.feat-card h3 { font-size: 20px; margin: 7px 0 6px; }
.feat-card .meta { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); margin-bottom: 12px; }
.feat-card p { font-size: 14.5px; color: var(--text-dim); }
/* span variations */
.feat-card.wide { grid-column: span 4; }
.feat-card.tall { grid-column: span 2; }

/* ============================================================
   ABOUT STRIP
   ============================================================ */
.about { position: relative; }
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.about-copy p { color: var(--text-dim); font-size: 17px; margin-bottom: 18px; }
.about-copy p strong { color: var(--text); font-weight: 600; }
.stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 34px; }
.stat {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 20px 16px; background: var(--bg-card);
}
.stat .n { font-family: var(--font-display); font-size: 30px; font-weight: 700; color: var(--text); letter-spacing: -0.03em; }
.stat .n .grad { background: linear-gradient(120deg,var(--accent-3),var(--accent-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.stat .l { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px; }
.about-visual { aspect-ratio: 1/1; border-radius: 22px; border: 1px solid var(--border); overflow: hidden; position: relative; background: var(--bg-card); }
#about-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ============================================================
   PROJECTS (stacking blocks)
   ============================================================ */
.proj-list { display: flex; flex-direction: column; gap: 28px; }
.proj {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: linear-gradient(180deg, var(--bg-card), var(--bg-card-2));
  min-height: 380px;
  transition: border-color 0.35s, box-shadow 0.4s;
}
.proj:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.proj.rev { grid-template-columns: 1fr 1fr; }
.proj.rev .proj-canvas-wrap { order: 2; }
.proj.rev .proj-body { order: 1; }
.proj-body { padding: 44px 42px; display: flex; flex-direction: column; justify-content: center; }
.proj-body .num { font-family: var(--font-mono); font-size: 13px; color: var(--accent); letter-spacing: 0.1em; }
.proj-body h3 { font-size: clamp(24px,3vw,32px); margin: 12px 0 14px; }
.proj-body p { color: var(--text-dim); font-size: 15.5px; margin-bottom: 22px; }
.proj-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.proj-tags span { font-family: var(--font-mono); font-size: 11.5px; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--text-dim); }
.proj-status { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); }
.proj-status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-3); box-shadow: 0 0 10px var(--accent-3); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.35;} }
.proj-canvas-wrap { position: relative; background: radial-gradient(120% 120% at 70% 20%, color-mix(in srgb,var(--accent) 9%, transparent), transparent 60%); border-left: 1px solid var(--border); overflow: hidden; }
.proj.rev .proj-canvas-wrap { border-left: none; border-right: 1px solid var(--border); }
.proj-canvas-wrap canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; }
.proj-demo-label { position: absolute; top: 16px; left: 16px; z-index: 3; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-faint); padding: 5px 10px; border: 1px solid var(--border); border-radius: 7px; background: color-mix(in srgb, var(--bg) 60%, transparent); backdrop-filter: blur(6px); }

.ai-banner {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 40px; padding: 14px 18px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 35%, var(--border));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent-2) 10%, transparent);
  font-family: var(--font-mono); font-size: 13px; color: var(--text-dim);
}
.ai-banner svg { width: 20px; height: 20px; flex-shrink: 0; stroke: var(--accent-2); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { position: relative; }
.contact-card {
  border: 1px solid var(--border); border-radius: 26px;
  padding: clamp(40px,6vw,72px);
  background:
    radial-gradient(110% 130% at 85% 0%, color-mix(in srgb,var(--accent-2) 16%, transparent), transparent 55%),
    linear-gradient(180deg, var(--bg-card), var(--bg-card-2));
  position: relative; overflow: hidden; text-align: center;
}
.contact-card h2 { font-size: clamp(30px,5vw,54px); margin-bottom: 16px; }
.contact-card p { color: var(--text-dim); font-size: 18px; max-width: 520px; margin: 0 auto 34px; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.contact-orbit { position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: 0.5; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--border); padding: 56px 0 40px; }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-brand { max-width: 320px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-dim); font-size: 14.5px; }
.footer-cols { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col h4 { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--text-faint); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-dim); font-size: 14.5px; padding: 5px 0; transition: color 0.2s, padding-left 0.2s; }
.footer-col a:hover { color: var(--accent-3); padding-left: 5px; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); }
.footer-socials { display: flex; gap: 10px; }
.footer-socials a { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); display: grid; place-items: center; transition: border-color 0.2s, transform 0.2s; }
.footer-socials a:hover { border-color: var(--accent); transform: translateY(-2px); }
.footer-socials svg { width: 17px; height: 17px; }