/* ============================================================
   CARDOCRAT — Design System
   Applying taste-skill: deterministic typography, single-accent
   color strategy, layout diversification, transform-only motion
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,300&display=swap');

/* ── Tokens ── */
:root {
  --bg:          #09090e;
  --surface:     #0f0f17;
  --surface-2:   #161622;
  --surface-3:   #1c1c2c;
  --border:      #252535;
  --border-2:    #303048;

  --accent:      #c9a84c;
  --accent-dim:  rgba(201, 168, 76, 0.15);
  --accent-glow: rgba(201, 168, 76, 0.08);

  --text:        #ede9e0;
  --text-muted:  #8a8a9e;
  --text-dim:    #4a4a60;

  --green:       #4ade80;
  --green-dim:   rgba(74, 222, 128, 0.12);

  --font-serif:  'Cormorant Garamond', 'Georgia', serif;
  --font-sans:   'DM Sans', system-ui, -apple-system, sans-serif;

  --radius-sm:   6px;
  --radius:      12px;
  --radius-lg:   18px;
  --radius-xl:   24px;

  --transition:  200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul, ol { list-style: none; }
img, svg { display: block; }

/* ── Typography ── */
.serif { font-family: var(--font-serif); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ── Layout ── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ── Navbar ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 14, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 2px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-logo-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  margin-bottom: 4px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 450;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--text);
  background: var(--surface-2);
}

.nav-cta {
  padding: 8px 18px;
  background: var(--accent);
  color: #09090e;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: opacity var(--transition), transform var(--transition);
}

.nav-cta:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* ── Hero (homepage) ── */
.hero {
  padding: 96px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(201,168,76,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--accent-dim);
  border: 1px solid rgba(201, 168, 76, 0.25);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-eyebrow-dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.hero-headline {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 600;
  color: var(--text);
  max-width: 780px;
  margin-bottom: 20px;
  line-height: 1.08;
}

.hero-headline em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.65;
  margin-bottom: 40px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  background: var(--accent);
  color: #09090e;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: opacity var(--transition), transform var(--transition);
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  color: var(--text-muted);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 450;
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-2);
  transform: translateY(-1px);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.hero-stat-value {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
}

.hero-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* ── Section ── */
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }

.section-header {
  margin-bottom: 40px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 600;
  color: var(--text);
}

.section-sub {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 10px;
  font-weight: 300;
  max-width: 480px;
}

/* ── Category Grid (homepage bento) ── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 1024px) {
  .category-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .category-grid { grid-template-columns: repeat(2, 1fr); }
}

.category-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
  text-decoration: none;
  color: inherit;
}

.category-card:hover {
  border-color: var(--accent);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.category-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  color: var(--accent);
}

.category-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.category-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.category-count {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: auto;
}

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

@media (max-width: 1100px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .cards-grid { grid-template-columns: 1fr; }
}

.card-tile {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.card-tile:hover {
  border-color: var(--border-2);
  transform: translateY(-3px);
}

.card-tile-header {
  padding: 24px 24px 20px;
  position: relative;
}

.card-visual {
  width: 100%;
  height: 140px;
  border-radius: var(--radius);
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-visual-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  transition: transform var(--transition-slow);
}

.card-visual-img[src*="bilt_mastercard"] {
  transform: scale(2.25);
}

.card-tile:hover .card-visual-img[src*="bilt_mastercard"] {
  transform: scale(2.3);
}

.card-visual-img[src*="chase_freedom_unlimited"] {
  transform: scale(1.4);
}

.card-tile:hover .card-visual-img[src*="chase_freedom_unlimited"] {
  transform: scale(1.45);
}

.card-tile:hover .card-visual-img {
  transform: scale(1.04);
}

/* Gradient fallback (no image) */
.card-visual-gradient {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 14px 16px;
}

.card-visual-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 60%);
}

.card-visual-network {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  margin-left: auto;
  position: relative;
}

.card-visual-chip {
  width: 28px;
  height: 20px;
  background: rgba(255,255,255,0.25);
  border-radius: 4px;
  margin-right: auto;
  position: relative;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.card-tag {
  padding: 3px 9px;
  background: var(--accent-dim);
  border: 1px solid rgba(201, 168, 76, 0.2);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.card-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 4px;
}

.card-issuer {
  font-size: 12px;
  color: var(--text-muted);
}

.card-tile-body {
  padding: 0 24px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-bonus-box {
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.card-bonus-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.card-bonus-value {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.card-bonus-spend {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-highlights {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.card-highlight {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.45;
}

.card-highlight-dot {
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}

.card-tile-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-fee {
  display: flex;
  flex-direction: column;
}

.card-fee-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.card-fee-value {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}

.card-fee-value.free {
  color: var(--green);
}

.card-apply-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  background: var(--accent);
  color: #09090e;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: opacity var(--transition), transform var(--transition);
}

.card-apply-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* ── Cards Page Layout ── */
.cards-page {
  padding: 48px 0 96px;
}

.cards-page-header {
  margin-bottom: 40px;
}

.cards-page-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.cards-page-sub {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 300;
}

/* ── Category Filter Bar ── */
.filter-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 36px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 450;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
  background: var(--surface);
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--border-2);
  transform: translateY(-1px);
}

.filter-btn.active {
  color: #09090e;
  background: var(--accent);
  border-color: var(--accent);
}

.filter-btn svg { flex-shrink: 0; }

/* ── Card count / empty state ── */
.cards-count {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.cards-count span {
  color: var(--text-muted);
  font-weight: 500;
}

.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
  gap: 12px;
}

.empty-state.visible { display: flex; }

.empty-state-icon {
  color: var(--text-dim);
  margin-bottom: 8px;
}

.empty-state-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--text-muted);
}

.empty-state-sub {
  font-size: 14px;
  color: var(--text-dim);
}

/* ── Card loading skeleton ── */
.card-skeleton {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: skeleton-pulse 1.6s ease-in-out infinite;
}

.card-skeleton-visual {
  height: 130px;
  margin: 24px 24px 18px;
  background: var(--surface-2);
  border-radius: var(--radius);
}

.card-skeleton-line {
  height: 12px;
  background: var(--surface-2);
  border-radius: 6px;
  margin: 0 24px 10px;
}

.card-skeleton-line.short { width: 60%; }

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

/* ── Card Combos ── */
.combos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .combos-grid { grid-template-columns: 1fr; }
}

.combo-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.combo-card:hover {
  border-color: var(--border-2);
  transform: translateY(-3px);
}

.combo-card-header {
  background: var(--surface-2);
  padding: 32px 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid var(--border);
}

.combo-ecosystem {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.combo-stack {
  position: relative;
  height: 110px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.combo-stack-img {
  position: absolute;
  width: 150px;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  transition: transform var(--transition-slow);
}

.combo-stack-fallback {
  position: absolute;
  width: 150px;
  height: 95px;
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: flex-end;
  padding: 8px 10px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
}

.combo-card:hover .combo-stack-img {
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
}

.combo-card-body {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.combo-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}

.combo-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  font-weight: 300;
}

.combo-synergy {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.combo-synergy-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ── Feature Banner ── */
.feature-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 56px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.feature-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(201,168,76,0.1) 0%, transparent 70%);
  pointer-events: none;
}

@media (max-width: 768px) {
  .feature-banner {
    grid-template-columns: 1fr;
    padding: 32px 28px;
  }
}

.feature-banner-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.feature-banner-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.feature-banner-sub {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 440px;
  line-height: 1.65;
  font-weight: 300;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}

@media (max-width: 640px) {
  .footer-inner { flex-direction: column; gap: 28px; }
}

.footer-brand .nav-logo-text { font-size: 18px; }

.footer-tagline {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 13px;
  color: var(--text-dim);
  padding: 4px 0;
  transition: color var(--transition);
}

.footer-link:hover { color: var(--text-muted); }

.footer-disclosure {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 760px;
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--border);
}

/* ── Utility ── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ── Animations ── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeUp 0.45s ease both;
}

/* ── Responsive nav ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { padding: 64px 0 56px; }
  .hero-stats { flex-wrap: wrap; gap: 28px; }
  .section { padding: 56px 0; }
}