/* ==========================================================================
   BPZILLA - CORE DESIGN SYSTEM & STYLESHEET
   Aesthetics: Light Archive with a kaiju identity. Warm paper and ink keep
   770,089 rows readable; the brand carries the Godzilla reference through the
   dorsal wordmark, the atomic-blue accent and the dark hero plate.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:ital,wght@0,400;0,600;0,700;1,700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* --------------------------------------------------------------------
     LIGHT ARCHIVE PALETTE
     Warm paper and ink, in the spirit of a factory brochure or an auction
     catalogue. The GT-R red stays, but as an accent rather than a glow.
     -------------------------------------------------------------------- */

  /* Surfaces */
  --bg-primary: #f6f4f0;      /* page — warm paper */
  --bg-secondary: #ffffff;    /* cards, header, tables */
  --bg-tertiary: #efebe4;     /* chips, inputs, quiet fills */
  --bg-card: #ffffff;
  --bg-hover: #e9e4db;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-inverse: #1c1f24;      /* the few panels that stay dark */

  /* Accents — all darkened enough to sit on paper at 4.5:1 or better */
  --gtr-red: #bd1620;
  --gtr-red-glow: rgba(189, 22, 32, 0.18);
  --gtr-red-dark: #8f1018;
  --gtr-red-soft: rgba(189, 22, 32, 0.08);
  --nissan-blue: #17568f;
  --nissan-blue-glow: rgba(23, 86, 143, 0.18);
  /* House colour — the shade of the firewall plate itself */
  --plate-blue: #1c4f7c;
  --plate-blue-deep: #12395c;

  /* Atomic breath. The bright value is for glow and for the dark hero plate,
     where it clears 6.6:1. On paper it only manages 2.7:1, so anything that
     has to be READ uses --atomic-ink instead, which clears 4.8:1 on every
     surface in the light theme. */
  --atomic: #3fa7d6;
  --atomic-ink: #176d95;
  --atomic-soft: rgba(63, 167, 214, 0.14);
  --nur-jade: #55634e;
  --gold-titanium: #7d5f13;
  --silver-spark: #5f6874;
  --purple-halo: #6320a3;
  --verified-green: #1f7a34;

  /* Ink & rules */
  --text-primary: #191c20;
  --text-secondary: #4c545e;
  --text-muted: #626a76;
  --text-on-accent: #ffffff;
  --text-on-inverse: #f2f0ec;
  --border-subtle: #e3ddd2;
  --border-strong: #cec6b8;
  --border-glow: rgba(189, 22, 32, 0.4);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Chakra Petch', 'Bebas Neue', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions & Shadows — soft and low, never neon */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px rgba(40, 35, 25, 0.05), 0 1px 3px rgba(40, 35, 25, 0.04);
  --shadow-md: 0 4px 14px rgba(40, 35, 25, 0.08);
  --shadow-glow: 0 0 0 3px rgba(189, 22, 32, 0.14);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: 
    radial-gradient(circle at 50% 0%, rgba(23, 86, 143, 0.05) 0%, transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(189, 22, 32, 0.04) 0%, transparent 45%),
    var(--bg-primary);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gtr-red);
}

/* Typography Utilities */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-weight: 700;
}

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

/* Header & Navigation Bar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px 10px;
  max-width: 1600px;
  margin: 0 auto;
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  cursor: pointer;
}

/* The wordmark is the firewall plate: a small stamped blue tag with a rivet
   at each end, which is where every number in this archive comes from. */
.brand-logo-badge {
  position: relative;
  background: linear-gradient(160deg, var(--plate-blue), var(--plate-blue-deep));
  border: 1px solid var(--plate-blue-deep);
  padding: 7px 10px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  gap: 7px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22),
              inset 0 -1px 0 rgba(0, 0, 0, 0.28),
              var(--shadow-sm);
}

/* Dorsal crest. A serrated ridge along the top of the tag — irregular teeth,
   because an even repeat reads as ornament rather than as a spine. Abstract
   on purpose: a shape, not anyone's monster. */
.brand-dorsal {
  position: absolute;
  left: 6px;
  right: 6px;
  top: -11px;
  height: 13px;
  background: linear-gradient(180deg, var(--atomic) 0%, var(--plate-blue) 90%);
  clip-path: polygon(0.0% 100.0%, 5.6% 38.0%, 11.1% 100.0%, 16.7% 12.0%, 22.2% 100.0%, 27.8% 45.0%, 33.3% 100.0%, 38.9% 0.0%, 44.4% 100.0%, 50.0% 30.0%, 55.6% 100.0%, 61.1% 8.0%, 66.7% 100.0%, 72.2% 48.0%, 77.8% 100.0%, 83.3% 22.0%, 88.9% 100.0%, 94.4% 42.0%, 100.0% 100.0%);
  pointer-events: none;
}
.brand-dorsal i { display: none; }

.plate-rivet {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #eef2f6, #8fa3b5 60%, #5d7285);
  box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.35);
  flex-shrink: 0;
}

.plate-emblem {
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.28rem;
  line-height: 1;
  letter-spacing: 1.5px;
}

.plate-tag {
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.28rem;
  line-height: 1;
  letter-spacing: 3px;
}

.brand-text-group h1 {
  font-size: 1.15rem;
  color: var(--text-primary);
  line-height: 1.1;
}

.brand-text-group .brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

/* Header Live Quick Search */
.header-search-wrap {
  flex: 1;
  max-width: 460px;
  margin: 0 24px;
  position: relative;
}

.header-search-input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  padding: 8px 16px 8px 38px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: var(--transition-fast);
}

.header-search-input:focus {
  outline: none;
  border-color: var(--gtr-red);
  box-shadow: var(--shadow-glow);
}

.search-icon-pos {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-shortcut-hint {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-action {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.82rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.btn-header-action:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.btn-header-action.highlight {
  background: linear-gradient(135deg, var(--gtr-red), var(--gtr-red-dark));
  border-color: var(--gtr-red);
  color: var(--text-on-accent);
}
.btn-header-action.highlight:hover {
  background: linear-gradient(135deg, var(--gtr-red-dark), var(--gtr-red-dark));
  box-shadow: var(--shadow-sm);
}

/* Telemetry Stats Ticker Bar */
.telemetry-ticker-bar {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 6px 24px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.ticker-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ticker-label {
  color: var(--text-muted);
}
.ticker-value {
  color: var(--text-primary);
  font-weight: 600;
}
.ticker-value.highlight-red {
  color: var(--gtr-red);
}
.ticker-value.highlight-blue {
  color: var(--nissan-blue);
}
.ticker-value.highlight-gold {
  color: var(--gold-titanium);
}

/* Main Navigation Tab Bar */
.nav-tab-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-tab-bar::-webkit-scrollbar {
  display: none;
}

.nav-tab-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 4px;
}

.nav-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.88rem;
  padding: 12px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.nav-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-tab-btn.active {
  color: var(--gtr-red);
  border-bottom-color: var(--gtr-red);
  background: var(--gtr-red-soft);
}

.nav-tab-btn .tab-badge {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  font-size: 0.68rem;
  padding: 1px 6px;
  border-radius: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.nav-tab-btn.active .tab-badge {
  border-color: var(--border-glow);
  color: var(--gtr-red);
}

/* Main Page Container */
.main-content {
  flex: 1;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

/* View Sections */
.view-section {
  display: none;
  animation: fadeIn 0.25s ease-out;
}
.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Showcase Banner */
.hero-showcase {
  position: relative;
  background:
    linear-gradient(180deg, rgba(18, 20, 24, 0.86) 0%, rgba(11, 13, 16, 0.94) 100%),
    url('../assets/gtr_r34_hero.jpg') center/cover no-repeat;
  border-color: rgba(63, 167, 214, 0.28);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  margin-bottom: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-showcase::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: radial-gradient(circle at 72% 46%, rgba(63, 167, 214, 0.26), transparent 68%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(63, 167, 214, 0.16);
  border: 1px solid rgba(63, 167, 214, 0.5);
  color: #9fd8f2;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.hero-title {
  font-size: 2.2rem;
  line-height: 1.15;
  color: #ffffff;
  margin-bottom: 12px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.55);
}

/* The hero keeps its dark photographic plate, so its type is the one place
   in the light theme that stays light. */
.hero-subtitle {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 24px;
}

.hero-actions-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Quick Model Quick-Selector Strip */
.model-quick-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 28px;
}

.model-card-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 10px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.model-card-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-hover);
  transform: translateY(-2px);
}

.model-card-btn.active {
  border-color: var(--gtr-red);
  background: var(--gtr-red-soft);
  box-shadow: var(--shadow-glow);
}

.model-card-btn .m-code {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.5px;
}
.model-card-btn .m-name {
  font-size: 0.72rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.model-card-btn .m-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* the active card sits on a red wash, which eats a little of the grey */
.model-card-btn.active .m-count,
.model-card-btn.active .m-name {
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-subtle);
  padding: 32px 24px;
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-tribute {
  line-height: 1.5;
}
.footer-tribute strong {
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .header-search-wrap {
    max-width: 280px;
    margin: 0 12px;
  }
  .hero-showcase {
    padding: 24px;
  }
  .hero-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 768px) {
  .header-top-bar {
    flex-direction: column;
    gap: 12px;
    padding: 12px 16px;
  }
  .header-search-wrap {
    width: 100%;
    max-width: 100%;
    margin: 0;
  }
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
  .telemetry-ticker-bar {
    display: none;
  }
  .main-content {
    padding: 16px 12px;
  }
  .model-quick-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}