/* ============================================
   WiSpec — Tactical Signal Intelligence Theme
   ============================================ */

:root {
  /* Core palette */
  --bg-deep: #06080d;
  --bg-surface: #0b0e14;
  --bg-card: #111620;
  --bg-card-hover: #161d2a;
  --border: #1c2333;
  --border-bright: #2a3548;

  /* Signal colors */
  --cyan: #00e5ff;
  --cyan-dim: #00e5ff33;
  --cyan-glow: #00e5ff18;
  --green: #39ff14;
  --green-dim: #39ff1433;
  --amber: #ffb020;
  --red: #ff4757;
  --purple: #a855f7;

  /* Text */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body: 'Outfit', sans-serif;
  --font-mono: 'Source Code Pro', monospace;

  /* Spacing */
  --section-pad: clamp(80px, 12vh, 140px);
  --container-max: 1200px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text-primary);
  background: var(--bg-deep);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
code { font-family: var(--font-mono); }
strong { font-weight: 600; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* ── Scanline Overlay ── */
.scanline-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 229, 255, 0.008) 2px,
    rgba(0, 229, 255, 0.008) 4px
  );
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background 0.4s, backdrop-filter 0.4s, padding 0.4s;
}

.nav.scrolled {
  background: rgba(6, 8, 13, 0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.nav-logo-icon {
  color: var(--cyan);
  display: flex;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.25s;
  letter-spacing: 0.01em;
}

.nav-links a:hover {
  color: var(--cyan);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border-bright);
  border-radius: 6px;
  font-size: 0.82rem !important;
  transition: border-color 0.25s, background 0.25s;
}

.nav-btn:hover {
  border-color: var(--cyan);
  background: var(--cyan-glow);
}

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 24px 60px;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--cyan), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1.05rem);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero-desc {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

.hero-desc strong {
  color: var(--cyan);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  transition: all 0.3s var(--ease-out);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #00b8d4);
  color: var(--bg-deep);
  box-shadow: 0 0 20px var(--cyan-dim), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.35), 0 8px 24px rgba(0, 0, 0, 0.4);
}

.btn-ghost {
  border: 1px solid var(--border-bright);
  color: var(--text-primary);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  background: var(--cyan-glow);
  color: var(--cyan);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  animation: fadeInUp 0.8s var(--ease-out) 0.55s both;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.1;
}

.hero-stat-unit {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--cyan);
}

.hero-stat-label {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.hero-stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ── Sections ── */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}

.section-dark {
  background: var(--bg-surface);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-desc {
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Overview Cards ── */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.overview-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.35s, transform 0.35s var(--ease-out), box-shadow 0.35s;
}

.overview-card:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 229, 255, 0.06);
}

.overview-card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--cyan-glow);
  color: var(--cyan);
  margin-bottom: 20px;
}

.overview-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.overview-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Pipeline (How It Works) ── */
.pipeline {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.pipeline-step {
  flex: 1;
  min-width: 240px;
  max-width: 300px;
  text-align: center;
}

.pipeline-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  opacity: 0.7;
}

.pipeline-visual {
  height: 160px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 229, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.pipeline-step h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.pipeline-step p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pipeline-step code {
  font-size: 0.82rem;
  color: var(--cyan);
  background: var(--cyan-glow);
  padding: 2px 6px;
  border-radius: 4px;
}

.pipeline-connector {
  display: flex;
  align-items: center;
  padding-top: 70px;
}

/* Pipeline wave canvases */
.pipeline-wave-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.pipeline-wave {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Pipeline delta bars */
.pipeline-delta {
  width: 80%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pipeline-delta-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pipeline-delta-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  width: 60px;
  text-align: right;
  flex-shrink: 0;
}

.pipeline-delta-fill {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  width: 0;
  transition: width 1.2s var(--ease-out);
}

.pipeline-delta-bar.animated .pipeline-delta-fill {
  width: var(--fill-pct);
}

/* Pipeline classify nodes */
.pipeline-classify {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

.pipeline-classify-node {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: border-color 0.3s, color 0.3s, box-shadow 0.3s;
}

.pipeline-classify-node[data-type="rf"] { border-color: var(--cyan-dim); color: var(--cyan); }
.pipeline-classify-node[data-type="svm"] { border-color: var(--green-dim); color: var(--green); }
.pipeline-classify-node[data-type="xgb"] { border-color: rgba(168, 85, 247, 0.3); color: var(--purple); }

.pipeline-classify-result {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan-glow), rgba(57, 255, 20, 0.1));
  border: 2px solid var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--cyan-dim);
}

.pipeline-classify-pct {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan);
}

/* ── Formula Block ── */
.formula-block {
  max-width: 700px;
  margin: 0 auto;
  padding: 32px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.formula-header {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.formula {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 16px;
  line-height: 2;
}

.formula-var {
  font-weight: 700;
  font-style: italic;
  color: var(--text-primary);
}

.formula-24g { color: var(--cyan); }
.formula-5g { color: var(--green); }
.formula-delta { color: var(--amber); font-weight: 600; }

.formula-caption {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Materials Grid ── */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.material-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
}

.material-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.material-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.material-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-bright);
}

.material-icon.concrete {
  background: linear-gradient(135deg, #4a4a4a, #6b6b6b);
}
.material-icon.drywall {
  background: linear-gradient(135deg, #d4cfc4, #efe9dc);
}
.material-icon.wood {
  background: linear-gradient(135deg, #8B6914, #c09440);
}
.material-icon.glass {
  background: linear-gradient(135deg, rgba(173, 216, 230, 0.4), rgba(200, 230, 255, 0.6));
  border-color: rgba(173, 216, 230, 0.3);
}
.material-icon.brick {
  background: linear-gradient(135deg, #8B3A3A, #c05050);
}
.material-icon.metal {
  background: linear-gradient(135deg, #707880, #a8b0b8);
}

.material-header h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
}

.material-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.material-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.material-bar-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  width: 50px;
  flex-shrink: 0;
}

.material-bar-track {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 3px;
  overflow: hidden;
}

.material-bar-fill {
  height: 100%;
  border-radius: 3px;
  width: 0;
  transition: width 1s var(--ease-out);
}

.material-bar-fill.animated {
  width: var(--w);
}

.bar-24g { background: var(--cyan); }
.bar-5g { background: var(--green); }

.material-bar-val {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  width: 42px;
  text-align: right;
  flex-shrink: 0;
}

.material-delta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.material-delta strong {
  color: var(--amber);
}

.material-delta-tag {
  font-size: 0.6rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.material-delta-tag.high {
  background: rgba(255, 71, 87, 0.12);
  color: var(--red);
}
.material-delta-tag.med {
  background: rgba(255, 176, 32, 0.12);
  color: var(--amber);
}
.material-delta-tag.low {
  background: rgba(0, 229, 255, 0.1);
  color: var(--cyan);
}

/* ── Results Section ── */
.results-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  margin-bottom: 56px;
  align-items: start;
}

.results-chart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px 32px;
}

.results-chart-inner {
  position: relative;
  height: 280px;
}

.results-bar-group {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 32px;
  height: 100%;
  position: relative;
  z-index: 1;
}

.results-bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.results-bar {
  width: 60px;
  height: 0;
  border-radius: 6px 6px 0 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10px;
  transition: height 1.4s var(--ease-out);
  position: relative;
}

.results-bar.animated {
  height: var(--h);
}

.results-bar-24g {
  background: linear-gradient(to top, var(--cyan), rgba(0, 229, 255, 0.4));
}

.results-bar-5g {
  background: linear-gradient(to top, var(--green), rgba(57, 255, 20, 0.4));
}

.results-bar-dual {
  background: linear-gradient(to top, var(--amber), rgba(255, 176, 32, 0.5));
  box-shadow: 0 0 24px rgba(255, 176, 32, 0.2);
}

.results-bar-winner .results-bar::after {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid var(--amber);
}

.results-bar-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--bg-deep);
}

.results-bar-label {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
}

.results-chart-baseline {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
}

/* Results stats */
.results-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.results-stat-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.results-stat-header {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.results-stat-big {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 4px;
}

.results-stat-big span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.results-stat-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Classifiers Table ── */
.classifiers-table {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.table-header {
  padding: 16px 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 14px 24px;
  text-align: left;
  font-size: 0.88rem;
}

th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}

td {
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

tr:last-child td { border-bottom: none; }

tr:hover td {
  background: rgba(0, 229, 255, 0.02);
}

.val-highlight {
  color: var(--cyan) !important;
  font-weight: 600;
}

.classifier-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.classifier-badge.rf { background: var(--cyan-glow); color: var(--cyan); border: 1px solid var(--cyan-dim); }
.classifier-badge.svm { background: rgba(57, 255, 20, 0.08); color: var(--green); border: 1px solid var(--green-dim); }
.classifier-badge.xgb { background: rgba(168, 85, 247, 0.08); color: var(--purple); border: 1px solid rgba(168, 85, 247, 0.25); }
.classifier-badge.knn { background: rgba(255, 176, 32, 0.08); color: var(--amber); border: 1px solid rgba(255, 176, 32, 0.25); }
.classifier-badge.gb { background: rgba(255, 71, 87, 0.08); color: var(--red); border: 1px solid rgba(255, 71, 87, 0.25); }

/* ── Applications Grid ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.app-card {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s, transform 0.3s var(--ease-out);
  position: relative;
}

.app-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.app-card-featured {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--bg-card), rgba(0, 229, 255, 0.04));
  border-color: var(--cyan-dim);
}

.app-card-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border: 1px solid var(--cyan-dim);
  border-radius: 100px;
}

.app-card-icon {
  color: var(--cyan);
  margin-bottom: 20px;
  opacity: 0.8;
}

.app-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.app-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Hardware Grid ── */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hw-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.hw-card-recommended {
  border-color: var(--cyan-dim);
  box-shadow: 0 0 40px var(--cyan-glow);
}

.hw-card-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--bg-deep);
  background: var(--cyan);
  padding: 3px 14px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hw-card-tier {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.hw-card-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  margin-bottom: 20px;
}

.hw-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px;
}

.hw-item-name {
  font-weight: 600;
  font-size: 0.88rem;
}

.hw-item-detail {
  width: 100%;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.hw-item-price {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
  font-weight: 600;
}

.hw-card-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.hw-card-total span { color: var(--text-secondary); }
.hw-card-total strong {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--cyan);
}

.hw-card-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ── Architecture Flow ── */
.arch-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow-x: auto;
}

.arch-stage {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 140px;
}

.arch-stage-header {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.arch-node {
  padding: 8px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.arch-node.highlight {
  border-color: var(--cyan-dim);
  color: var(--cyan);
  background: var(--cyan-glow);
}

.arch-arrow {
  width: 32px;
  height: 2px;
  margin-top: 32px;
  background: var(--border-bright);
  position: relative;
  flex-shrink: 0;
}

.arch-arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -4px;
  border: 5px solid transparent;
  border-left: 6px solid var(--border-bright);
}

.arch-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.arch-stat {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.arch-stat-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 4px;
}

.arch-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Citation ── */
.cite-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.cite-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.cite-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cite-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}

.cite-copy-btn:hover {
  color: var(--cyan);
  background: var(--cyan-glow);
}

.cite-copy-btn.copied {
  color: var(--green);
}

.cite-block pre {
  padding: 20px;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.cite-license {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.cite-license-icon {
  color: var(--amber);
  flex-shrink: 0;
  margin-top: 2px;
}

.cite-license strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 6px;
}

.cite-license p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cite-license a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── Footer ── */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--cyan);
}

/* ── Animations ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--green); }
  50% { opacity: 0.5; box-shadow: 0 0 4px var(--green); }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .overview-grid { grid-template-columns: repeat(2, 1fr); }
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
  .hardware-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .results-layout { grid-template-columns: 1fr; }
  .arch-stats { grid-template-columns: repeat(2, 1fr); }
  .cite-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(6, 8, 13, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .overview-grid { grid-template-columns: 1fr; }
  .materials-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .app-card-featured { grid-column: span 1; }

  .pipeline {
    flex-direction: column;
    align-items: center;
  }

  .pipeline-connector {
    transform: rotate(90deg);
    padding-top: 0;
  }

  .pipeline-step {
    max-width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .hero-stat-divider {
    width: 40px;
    height: 1px;
  }

  .arch-flow {
    flex-direction: column;
    align-items: stretch;
  }

  .arch-arrow {
    width: 2px;
    height: 20px;
    margin: 0 auto;
  }

  .arch-arrow::after {
    right: auto;
    left: -4px;
    top: auto;
    bottom: 0;
    border: 5px solid transparent;
    border-top: 6px solid var(--border-bright);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .results-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 3.5rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .arch-stats {
    grid-template-columns: 1fr;
  }

  table {
    font-size: 0.75rem;
  }

  th, td {
    padding: 10px 14px;
  }
}