/* ============================================================
   Sid Reddy — Portfolio design system
   Aurora base + dark glassmorphism. Light neumorphic pages
   override via body.light (see lead-scoring.html).
   ============================================================ */

:root {
  /* Palette — "Dubai night signal" */
  --bg: #060914;
  --bg-soft: #0a0f20;
  --ink: #eaeef8;
  --muted: #94a1ba;
  --faint: #5d6a85;

  --violet: #7c5cff;
  --cyan: #38d6e7;
  --gold: #f0b545;
  --rose: #f4548c;

  --grad-accent: linear-gradient(110deg, var(--violet), var(--cyan) 55%, var(--gold));

  /* Glass recipe */
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-hover: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.11);
  --glass-border-hover: rgba(255, 255, 255, 0.24);
  --glass-blur: 18px;
  --glass-radius: 20px;
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.09);

  /* Type */
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --maxw: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- Aurora background ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 75% 110%, rgba(240, 181, 69, 0.07) 0%, transparent 55%),
    var(--bg);
}
.aurora .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  mix-blend-mode: screen;
  animation: drift 14s ease-in-out infinite;
  will-change: transform;
}
.orb-1 { width: 620px; height: 620px; top: -220px; left: -140px;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.42), transparent 70%); }
.orb-2 { width: 520px; height: 520px; top: 12%; right: -160px; animation-duration: 17s; animation-delay: -4s;
  background: radial-gradient(circle, rgba(56, 214, 231, 0.30), transparent 70%); }
.orb-3 { width: 440px; height: 440px; bottom: -160px; left: 34%; animation-duration: 12s; animation-delay: -8s;
  background: radial-gradient(circle, rgba(240, 181, 69, 0.16), transparent 70%); }

@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(42px, -28px) scale(1.05); }
  50% { transform: translate(-24px, 38px) scale(0.96); }
  75% { transform: translate(-38px, -18px) scale(1.07); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Type scale ---------- */
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.5rem, 6vw, 4.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0 0 1em; color: var(--muted); }
strong { color: var(--ink); font-weight: 600; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px;
}

.grad-text {
  background: var(--grad-accent);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: grad-shift 7s ease infinite;
}
@keyframes grad-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.mono { font-family: var(--font-mono); }

/* ---------- Layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 88px 0; }

/* ---------- Glass primitives ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow);
}
.glass-hover { transition: transform 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease); }
.glass-hover:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-3px);
}

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 13px 26px; border-radius: 13px; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.25s var(--ease);
  text-decoration: none !important;
}
.btn-primary {
  background: var(--grad-accent); background-size: 200% 200%;
  color: #0a0c16; border: none;
}
.btn-primary:hover { background-position: 100% 50%; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(124, 92, 255, 0.35); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  color: var(--ink);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-2px); }

.chip {
  display: inline-block; font-family: var(--font-mono); font-size: 0.72rem;
  padding: 5px 12px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--muted);
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 14px; left: 50%; transform: translateX(-50%);
  z-index: 50; width: min(var(--maxw), calc(100% - 28px));
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px; border-radius: 16px;
}
.nav .logo {
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem;
  color: var(--ink); text-decoration: none; letter-spacing: -0.01em;
}
.nav .logo span { color: var(--gold); }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a {
  color: var(--muted); font-size: 0.88rem; font-weight: 600; text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-toggle { display: none; background: none; border: none; color: var(--ink); font-size: 1.5rem; cursor: pointer; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: calc(100% + 10px); left: 0; right: 0;
    flex-direction: column; padding: 18px; gap: 16px;
    background: rgba(10, 14, 30, 0.92);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border); border-radius: 16px;
  }
  .nav-links.open { display: flex; }
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 44px 0; margin-top: 40px;
  color: var(--faint); font-size: 0.85rem;
}
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Hero WebGL canvas ---------- */
.hero { position: relative; }
#hero3d {
  position: absolute; inset: 0; z-index: -1;
  pointer-events: none; opacity: 0;
  transition: opacity 1.4s ease 0.3s;
}
#hero3d.on { opacity: 1; }

/* ---------- Timeline draw-on-scroll ---------- */
.timeline::before { transform: scaleY(0); transform-origin: top; transition: transform 1.8s var(--ease); }
.timeline.drawn::before { transform: scaleY(1); }

/* ---------- 3D tilt cards ---------- */
.tilt { transform-style: preserve-3d; will-change: transform; }
.tilt .glyph { transform: translateZ(30px); display: inline-block; }
.tilt h3 { transform: translateZ(20px); }

/* ---------- Impact SVG graph ---------- */
.impact { padding: 32px; margin-top: 26px; }
.impact svg { width: 100%; height: auto; display: block; margin-top: 14px; }
.impact .cap { font-family: var(--font-mono); font-size: 0.68rem; color: var(--faint); margin: 10px 0 0; }


/* ---------- Demo page shared bits ---------- */
.demo-shell { padding-top: 130px; }
.demo-head { margin-bottom: 36px; }
.demo-head .chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.back-link { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); }
.back-link:hover { color: var(--cyan); }

.range {
  -webkit-appearance: none; appearance: none; width: 100%;
  height: 6px; border-radius: 3px;
  background: rgba(255, 255, 255, 0.12); outline: none;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--grad-accent); cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 2px 10px rgba(124, 92, 255, 0.5);
}
.range::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--cyan); cursor: pointer; border: 2px solid #fff;
}