/* ===========================
   CRED402 — LANDING PAGE CSS
   =========================== */

:root {
  --bg: #0a0a0f;
  --bg-card: #0f0f18;
  --bg-elevated: #13131f;
  --bg-border: #1e1e30;
  --blue: #3b82f6;
  --blue-dim: rgba(59, 130, 246, 0.12);
  --blue-glow: rgba(59, 130, 246, 0.2);
  --gold: #f59e0b;
  --gold-dim: rgba(245, 158, 11, 0.12);
  --text-primary: #f0f0f8;
  --text-secondary: #8888aa;
  --text-dim: #4a4a6a;
  --font: 'Inter', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 0 0 1px rgba(255,255,255,0.04);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

/* ===== UTILITIES ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gold { color: var(--gold); }
.text-blue { color: var(--blue); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.5), 0 4px 16px rgba(59,130,246,0.3);
}
.btn-primary:hover {
  background: #5b9cf8;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.7), 0 6px 24px rgba(59,130,246,0.4);
  transform: translateY(-1px);
}
.btn-primary:active { transform: none; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--bg-border);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.04);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 13px;
}

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.nav.nav-scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--bg-border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo-sup {
  color: var(--gold);
  font-size: 0.65em;
  vertical-align: super;
  font-weight: 600;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 160px 0 120px;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: 100px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-sub {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.5;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-actions .btn-primary {
  padding: 13px 26px;
  font-size: 15px;
}

.hero-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.chain-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: 100px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== SECTIONS ===== */
.section {
  padding: 96px 0;
}

.section-dark {
  background: var(--bg-card);
  border-top: 1px solid var(--bg-border);
  border-bottom: 1px solid var(--bg-border);
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 56px;
  max-width: 600px;
  line-height: 1.6;
}

/* ===== CARDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
}

.card-featured {
  border-color: rgba(59, 130, 246, 0.3);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, var(--bg-card) 60%);
  position: relative;
}

.card-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.card p em {
  color: var(--text-primary);
  font-style: normal;
  font-weight: 500;
}

/* ===== SCORE SECTION ===== */
.score-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: start;
}

.score-factors {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.factor {
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.factor-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.factor-icon {
  font-size: 22px;
  flex-shrink: 0;
}

.factor-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.factor-sub {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

.factor-weight {
  margin-left: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  font-family: var(--mono);
  background: var(--blue-dim);
  padding: 3px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}

.factor-bar {
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.factor-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Sample Score Card */
.score-card-sample {
  position: sticky;
  top: 100px;
}

.score-card {
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.04);
}

.score-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--bg-border);
}

.score-agent-addr {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-secondary);
}

.score-card-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-dim);
  padding: 3px 8px;
  border-radius: 4px;
}

.score-display {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--bg-border);
}

.score-number {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  font-family: var(--mono);
}

.score-grade {
  font-size: 28px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.score-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.score-bars {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-bottom: 1px solid var(--bg-border);
}

.score-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
}

.score-bar-row span:first-child {
  width: 80px;
  flex-shrink: 0;
}

.mini-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.mini-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--blue);
  transition: width 1s cubic-bezier(0.22, 1, 0.36, 1);
}

.bar-val {
  width: 24px;
  text-align: right;
  font-family: var(--mono);
  font-size: 11px;
  flex-shrink: 0;
}

.score-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  font-size: 11px;
  color: var(--text-dim);
}

.score-trend.up { color: #22c55e; }
.score-trend.down { color: #ef4444; }

/* ===== DEMO ===== */
.demo-box {
  max-width: 680px;
  margin: 0 auto;
}

.demo-input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.demo-input {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--mono);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.demo-input::placeholder {
  color: var(--text-dim);
  font-family: var(--font);
}

.demo-input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.demo-hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.demo-hint code {
  font-family: var(--mono);
  color: var(--text-secondary);
}

/* Loading */
.demo-loading {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  margin-top: 16px;
}

.loading-dots {
  display: flex;
  gap: 4px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
  animation: blink 1.2s infinite;
}
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 80%, 100% { opacity: 0.2; }
  40% { opacity: 1; }
}

.loading-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Result card */
.demo-result {
  margin-top: 16px;
}

.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card {
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.15), 0 20px 60px rgba(0,0,0,0.3);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--bg-border);
}

.result-addr {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.result-ens {
  font-size: 12px;
  color: var(--blue);
  margin-top: 2px;
}

.result-verified {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-dim);
  padding: 4px 10px;
  border-radius: 6px;
}

.result-score-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--bg-border);
}

.result-score-big {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.result-number {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  font-family: var(--mono);
  line-height: 1;
}

.result-grade-badge {
  font-size: 22px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
}

.grade-a { color: #22c55e; background: rgba(34,197,94,0.12); }
.grade-b { color: var(--blue); background: var(--blue-dim); }
.grade-c { color: var(--gold); background: var(--gold-dim); }
.grade-d { color: #f97316; background: rgba(249,115,22,0.12); }
.grade-f { color: #ef4444; background: rgba(239,68,68,0.12); }

.result-label {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.result-sublabel {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.result-factors {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-bottom: 1px solid var(--bg-border);
}

.result-factor-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rf-icon { font-size: 14px; flex-shrink: 0; }

.rf-name {
  font-size: 12px;
  color: var(--text-secondary);
  width: 80px;
  flex-shrink: 0;
}

.rf-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.rf-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.rf-score {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-secondary);
  width: 20px;
  text-align: right;
  flex-shrink: 0;
}

.result-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  flex-wrap: wrap;
  gap: 8px;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
}

.result-scored {
  font-size: 11px;
  color: var(--text-dim);
}

/* ===== API SECTION ===== */
.api-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}

.code-block {
  background: #0d0d18;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-family: var(--mono);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--bg-border);
}

.code-lang {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.copy-btn {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: 1px solid var(--bg-border);
  border-radius: 4px;
  padding: 3px 8px;
  cursor: pointer;
  font-family: var(--font);
  transition: var(--transition);
}
.copy-btn:hover {
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.15);
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
}

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

.comment { color: #4a5568; }
.key { color: #93c5fd; }
.str { color: #86efac; }
.num { color: var(--gold); }
.brace { color: var(--text-secondary); }
.colon { color: var(--text-dim); }
.comma { color: var(--text-dim); }

.api-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.api-feature {
  display: flex;
  gap: 16px;
}

.api-feature-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.api-feature-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.api-feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== USE CASES ===== */
.card-usecase {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.usecase-icon {
  font-size: 28px;
}

.card-usecase h3 {
  font-size: 17px;
  font-weight: 600;
}

.card-usecase p {
  flex: 1;
}

.usecase-example {
  margin-top: 8px;
}

.usecase-example code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue);
  background: var(--blue-dim);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
}

/* ===== CTA STRIP ===== */
.cta-strip {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(245, 158, 11, 0.04) 100%);
  border-top: 1px solid var(--bg-border);
  border-bottom: 1px solid var(--bg-border);
  padding: 64px 0;
}

.cta-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.cta-sub {
  color: var(--text-secondary);
  font-size: 16px;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ===== FOOTER ===== */
.footer {
  padding: 64px 0 32px;
  border-top: 1px solid var(--bg-border);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer-eth {
  font-size: 12px;
  color: var(--blue);
  font-family: var(--mono);
}

.footer-links-group {
  display: flex;
  gap: 48px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--bg-border);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-chain {
  font-size: 13px;
  color: var(--text-dim);
}

.footer-copy {
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .score-layout {
    grid-template-columns: 1fr;
  }

  .score-card-sample {
    position: static;
    max-width: 400px;
    margin: 0 auto;
  }

  .api-layout {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links { display: none; }

  .hero {
    padding: 120px 0 80px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .demo-input-row {
    flex-direction: column;
  }

  .demo-input-row .btn {
    width: 100%;
    justify-content: center;
  }

  .cta-content {
    text-align: center;
    justify-content: center;
  }

  .cta-title {
    font-size: 24px;
  }

  .footer-links-group {
    gap: 32px;
  }

  .result-meta {
    display: none;
  }

  .footer-top {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-chain {
    gap: 8px;
  }
}