/* ==========================================================================
   Vintage Lens - Core Design System & Tokens
   ========================================================================== */

:root {
  /* Color Palette: Classic Navy, Porcelain White, and Warm Antique Gold */
  --bg-main: #0B1120;
  --bg-surface: #111B32;
  --bg-surface-elevated: #182647;
  --bg-surface-translucent: rgba(17, 27, 50, 0.85);
  
  --border-subtle: #1E2E54;
  --border-focus: #C5A046;

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --gold-primary: #C5A046;
  --gold-hover: #D4AF37;
  --gold-light: #FBF4DE;
  --gold-border: #8C6D23;

  --cobalt-primary: #2563EB;
  --cobalt-light: #60A5FA;
  --cobalt-bg: rgba(37, 99, 235, 0.12);

  --accent-emerald: #10B981;
  --accent-rose: #F43F5E;
  --accent-amber: #F59E0B;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Elevations & Shadows */
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(197, 160, 70, 0.15);
  
  /* Layout & Sizing */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at 50% -20%, #172554 0%, #0B1120 70%);
  background-attachment: fixed;
  overflow-x: hidden;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-surface-translucent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-logo img,
.brand-logo svg {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 1.3rem;
  line-height: 1.1;
}

.brand-subtitle {
  color: var(--gold-primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold-hover);
}

.btn-primary-tg {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--gold-primary);
  color: #0B1120;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--gold-border);
  box-shadow: 0 4px 12px rgba(197, 160, 70, 0.25);
  transition: all 0.2s ease;
}

.btn-primary-tg:hover {
  background-color: var(--gold-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(197, 160, 70, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--border-subtle);
  border-color: var(--text-secondary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding: 4.5rem 0 3.5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--cobalt-bg);
  border: 1px solid rgba(96, 165, 250, 0.25);
  color: var(--cobalt-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  width: fit-content;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.15;
  color: #FFFFFF;
  letter-spacing: -0.02em;
}

.hero-title span {
  color: var(--gold-primary);
  font-style: italic;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.stat-item h3 {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ==========================================================================
   Hero Interactive Simulation Card
   ========================================================================== */

.hero-card-preview {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  position: relative;
}

.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.bot-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-emerald);
  font-size: 0.85rem;
  font-weight: 600;
}

.bot-tag::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.simulation-body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sim-item-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sim-stamp-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  border: 1px solid var(--gold-border);
  background-color: var(--bg-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-primary);
}

.sim-item-info h4 {
  font-size: 1.15rem;
  color: var(--text-primary);
}

.sim-item-info p {
  font-size: 0.85rem;
  color: var(--gold-primary);
  font-weight: 500;
}

.sim-report-box {
  background-color: var(--bg-surface-elevated);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  border-left: 3px solid var(--gold-primary);
}

.report-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
}

.report-row strong {
  color: var(--text-primary);
}

.price-highlight {
  font-size: 1.25rem;
  font-weight: 700;
  color: #38BDF8;
}

/* ==========================================================================
   Feature Grid & Showcase
   ========================================================================== */

.section-padding {
  padding: 4.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-subtitle {
  color: var(--gold-primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: #FFFFFF;
  line-height: 1.2;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 0.75rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.feature-icon-box {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background-color: var(--cobalt-bg);
  color: var(--cobalt-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 600;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Catalog Marks Showcase
   ========================================================================== */

.marks-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.25rem;
}

.mark-pill-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.mark-pill-card:hover {
  border-color: var(--gold-primary);
  background-color: var(--bg-surface-elevated);
}

.mark-pill-card h4 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-top: 0.25rem;
}

.mark-pill-card span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Step-by-step How it Works
   ========================================================================== */

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.step-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  position: relative;
}

.step-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold-primary);
  line-height: 1;
  margin-bottom: 1rem;
}

.step-card h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */

.cta-banner {
  background: linear-gradient(135deg, #172554 0%, #1E1B4B 100%);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-card);
  margin: 2rem 0;
}

.cta-banner h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  color: #FFFFFF;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* ==========================================================================
   Analytics Dashboard Styles
   ========================================================================== */

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 2rem;
}

.dashboard-title h1 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  color: #FFFFFF;
}

.dashboard-title p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.dashboard-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.kpi-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.kpi-sub {
  font-size: 0.8rem;
  color: var(--accent-emerald);
  font-weight: 500;
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  margin-bottom: 2rem;
}

.chart-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.chart-card.full-width {
  grid-column: 1 / -1;
}

.chart-card h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* Data Table */
.table-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  overflow-x: auto;
  margin-bottom: 3rem;
}

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-input {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  width: 260px;
}

.search-input:focus {
  outline: none;
  border-color: var(--gold-primary);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.badge-confidence {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .chart-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}