/* ============================================================
   HandMatrix Showcase — Master Stylesheet (Upgraded)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=JetBrains+Mono:wght@400;700&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg-void:      #04030d;
  --bg-dark:      #07050f;
  --bg-deep:      #0d0b20;
  --bg-surface:   #130f25;

  --brand-cyan:   #00f2fe;
  --brand-violet: #8b5cf6;
  --brand-pink:   #ff3366;
  --brand-green:  #10b981;
  --brand-amber:  #f59e0b;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --transition-fast:   0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s  cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   0.6s  cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-glow-cyan:   0 0 30px rgba(0,242,254,0.25);
  --shadow-glow-violet: 0 0 30px rgba(139,92,246,0.35);
  --shadow-glow-pink:   0 0 30px rgba(255,51,102,0.3);
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-void);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5 {
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}
p { color: var(--text-secondary); }
a { text-decoration: none; color: var(--brand-cyan); transition: color var(--transition-fast); }
a:hover { color: var(--brand-violet); }
::selection { background: rgba(139,92,246,0.35); color: #fff; }

/* ── Background Canvas ─────────────────────────────────────── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
main { position: relative; z-index: 1; margin-top: 76px; padding-bottom: 6rem; }

/* ── Navigation ─────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; width: 100%; z-index: 200;
  padding: 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}
.nav-glass {
  background: rgba(4,3,13,0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 2rem;
}
.logo {
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-violet) 100%);
  -webkit-background-clip: text;
  color: transparent;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  flex-wrap: nowrap;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav-links a.active {
  color: var(--brand-cyan);
  background: rgba(0,242,254,0.08);
  box-shadow: inset 0 0 0 1px rgba(0,242,254,0.2);
  text-shadow: 0 0 12px rgba(0,242,254,0.6);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600; font-size: 0.9rem;
  cursor: pointer; border: none;
  transition: all var(--transition-normal);
  font-family: var(--font-sans);
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand-violet), var(--brand-cyan));
  color: white;
  box-shadow: 0 4px 20px rgba(139,92,246,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(0,242,254,0.5);
  color: white;
}
.btn-secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.12);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.25);
  color: var(--text-primary);
  transform: translateY(-1px);
}
.btn-danger {
  background: rgba(255,51,102,0.15);
  color: var(--brand-pink);
  border: 1px solid rgba(255,51,102,0.3);
}
.btn-danger:hover {
  background: rgba(255,51,102,0.25);
  transform: translateY(-1px);
  color: var(--brand-pink);
}

/* ── Text Utilities ──────────────────────────────────────────── */
.text-gradient {
  background: linear-gradient(135deg, var(--brand-cyan) 0%, var(--brand-violet) 60%, var(--brand-pink) 100%);
  -webkit-background-clip: text;
  color: transparent;
  background-clip: text;
}
.text-gradient-v { /* violet */
  background: linear-gradient(135deg, var(--brand-violet), var(--brand-cyan));
  -webkit-background-clip: text;
  color: transparent;
}
.text-cyan { color: var(--brand-cyan); }
.text-violet { color: var(--brand-violet); }
.text-pink { color: var(--brand-pink); }
.text-green { color: var(--brand-green); }
.text-muted { color: var(--text-muted); }

/* ── Section Header ─────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header .eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand-cyan);
  margin-bottom: 0.75rem;
  display: block;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 1rem;
}
.section-header p {
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ── Glass Panel ─────────────────────────────────────────────── */
.glass-panel {
  background: rgba(13,11,32,0.5);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.glass-panel:hover { border-color: rgba(139,92,246,0.3); }
.glass-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.035) 0%, transparent 60%);
  pointer-events: none;
}

/* ── Cards ───────────────────────────────────────────────────── */
.glass-card {
  display: block;
  background: rgba(13,11,32,0.4);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-slow);
  cursor: pointer;
}
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(139,92,246,0.12), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.glass-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,242,254,0.3);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 20px rgba(0,242,254,0.12);
  color: inherit;
}
.glass-card:hover::before { opacity: 1; }

/* ── Readout Panel ───────────────────────────────────────────── */
.readout-panel {
  background: rgba(4,3,13,0.8);
  border: 1px solid rgba(0,242,254,0.18);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.readout-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.readout-item:last-child { border-bottom: none; }
.readout-label { color: var(--brand-cyan); opacity: 0.8; }
.readout-value { color: #fff; font-weight: 700; }

/* ── Canvas Container ────────────────────────────────────────── */
.canvas-container {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg);
  background: #000;
  border: 1px solid rgba(255,255,255,0.08);
}
.canvas-container canvas { display: block; width: 100%; }
.canvas-rec-dot {
  position: absolute; top: 1rem; right: 1rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--brand-pink);
  box-shadow: 0 0 10px var(--brand-pink);
  animation: pulse-rec 2s infinite;
}

/* ── Status Badge ─────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.badge-cyan   { background: rgba(0,242,254,0.1); color: var(--brand-cyan); border: 1px solid rgba(0,242,254,0.25); }
.badge-violet { background: rgba(139,92,246,0.1); color: var(--brand-violet); border: 1px solid rgba(139,92,246,0.25); }
.badge-green  { background: rgba(16,185,129,0.1); color: var(--brand-green); border: 1px solid rgba(16,185,129,0.25); }
.badge-pink   { background: rgba(255,51,102,0.1); color: var(--brand-pink); border: 1px solid rgba(255,51,102,0.25); }

/* ── Progress Bar ─────────────────────────────────────────────── */
.progress-bar {
  width: 100%; height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(to right, var(--brand-violet), var(--brand-cyan));
  transition: width 0.4s ease;
  box-shadow: 0 0 8px rgba(0,242,254,0.5);
}

/* ── Confidence Meter ─────────────────────────────────────────── */
.conf-meter { width: 80px; height: 80px; position: relative; display: grid; place-items: center; }
.conf-meter svg { position: absolute; inset: 0; transform: rotate(-90deg); }
.conf-value { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--brand-cyan); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 640px) {
  .section-header h2 { font-size: 1.75rem; }
}