/* ==============================================================================
   PROJECT JUAN DESIGN SYSTEM & CORE STYLESHEET
   Color Palette: Deep Navy, Civic Blue, Gold/Yellow Accent, Neutral Grays
   ============================================================================== */

:root {
  --primary-navy: #0B192C;
  --civic-blue: #1E3E62;
  --brand-orange: #FF6500;
  --accent-gold: #FFC107;
  --bg-light: #F8F9FA;
  --surface-white: #FFFFFF;
  --text-dark: #212529;
  --text-muted: #6C757D;
  --border-color: #DEE2E6;
  --status-ongoing: #0D6EFD;
  --status-completed: #198754;
  --status-delayed: #DC3545;
  --status-unknown: #6C757D;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

/* Header & Global Navigation */
.navbar {
  background-color: var(--primary-navy);
  color: var(--surface-white);
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--surface-white);
  font-weight: 700;
  font-size: 1.25rem;
}

.navbar-brand img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  list-style: none;
}

.nav-links a {
  color: #E0E0E0;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-primary {
  background-color: var(--brand-orange);
  color: var(--surface-white);
}

.btn-primary:hover {
  background-color: #E05500;
}

.btn-secondary {
  background-color: var(--civic-blue);
  color: var(--surface-white);
}

/* Hero Section Architecture */
.hero {
  background: linear-gradient(135deg, var(--primary-navy) 0%, var(--civic-blue) 100%);
  color: var(--surface-white);
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-left h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.hero-tagline {
  color: var(--accent-gold);
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.hero-search-box {
  display: flex;
  gap: 0.5rem;
  background: var(--surface-white);
  padding: 0.5rem;
  border-radius: 8px;
  margin-top: 2rem;
}

.hero-search-box input {
  flex: 1;
  border: none;
  padding: 0.75rem;
  font-size: 1rem;
  outline: none;
}

/* Commercial Art Showcase & Carousel */
.hero-visual {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  background: var(--primary-navy);
  aspect-ratio: 16/9;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Provenance Card Component */
.provenance-card {
  background: var(--surface-white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.provenance-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: #E9ECEF;
  color: var(--text-muted);
}

.provenance-tag.official { background: #D1E7DD; color: #0F5132; }
.provenance-tag.signboard { background: #CFF4FC; color: #055160; }
.provenance-tag.unverified { background: #FFF3CD; color: #664D03; }

/* Responsive Grid Topology */
.container {
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 2rem 1rem;
  }
}