/* ==========================================================================
   KINTAMANI — Kaldera Purba & Danau Batur, Bali
   Design System Tokens & Custom Styling (Soft Highland Mist & Anti-AI-Slop)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700;800;900&family=Playfair+Display:ital,wght@0,500;0,600;0,700;0,800;1,400;1,600&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* ------------------------------------------------------------------------
     SOFT HIGHLAND MIST THEME (Default - Lembut, Sejuk, Non-Glaring)
     Menghilangkan seluruh rona hijau pekat/mencolok; digantikan palet kabut
     pegunungan, air danau tenang, dan batuan mineral alami.
     ------------------------------------------------------------------------ */
  --bg-deep: #f8f9fa;
  --bg-base: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f4f8;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;

  --text-heading: #0f172a;      /* Deep Basalt Slate */
  --text-body: #334155;         /* Soft Readable Charcoal */
  --text-muted: #64748b;        /* Calm Muted Slate */
  --text-dim: #94a3b8;          /* Subtle Slate */

  --border-caldera: rgba(15, 23, 42, 0.08);
  --border-caldera-strong: rgba(15, 23, 42, 0.16);
  --border-copper: rgba(180, 83, 9, 0.35);

  --volcanic-copper: #b45309;       /* Hangatnya Kopi & Sunrise Batur */
  --volcanic-copper-hover: #9a3412;
  --volcanic-ochre: #d97706;
  --volcanic-glow: #f59e0b;

  --lake-accent: #2c5267;           /* Slate Cyan Lembut Air Danau */
  --lake-accent-light: #e0f2fe;

  --nav-bg: rgba(255, 255, 255, 0.92);
  --nav-text: #0f172a;
  
  --card-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 4px 14px rgba(15, 23, 42, 0.03);
  --card-shadow-hover: 0 12px 28px -6px rgba(15, 23, 42, 0.09), 0 6px 12px -4px rgba(15, 23, 42, 0.04);

  /* Typography */
  --font-serif-heading: 'Playfair Display', Georgia, serif;
  --font-display-title: 'Cinzel', serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"],
.dark {
  /* ------------------------------------------------------------------------
     BATU BASALT SLATE THEME (Soft Neutral Dark - ZERO Green)
     Menggunakan charcoal basalt netral tanpa semburat hijau rawa.
     ------------------------------------------------------------------------ */
  --bg-deep: #121417;
  --bg-base: #121417;
  --bg-surface: #1a1d22;
  --bg-subtle: #15181c;
  --bg-card: #1a1d22;
  --bg-card-hover: #21252b;

  --text-heading: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --border-caldera: rgba(255, 255, 255, 0.08);
  --border-caldera-strong: rgba(255, 255, 255, 0.16);
  --border-copper: rgba(217, 119, 6, 0.4);

  --volcanic-copper: #d97706;
  --volcanic-copper-hover: #f59e0b;
  --volcanic-ochre: #f59e0b;
  --volcanic-glow: #fbbf24;

  --lake-accent: #38bdf8;
  --lake-accent-light: rgba(56, 189, 248, 0.12);

  --nav-bg: rgba(18, 20, 23, 0.94);
  --nav-text: #f8fafc;

  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 16px 36px -12px rgba(0, 0, 0, 0.65);
}

/* Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
  color: var(--text-body);
  font-family: var(--font-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background-color: var(--bg-base);
  background-image: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.7) 0%, var(--bg-base) 70%);
  background-attachment: fixed;
  color: var(--text-body);
  line-height: 1.65;
  transition: background-color 200ms ease, color 200ms ease;
}

[data-theme="dark"] body,
.dark body {
  background-image: radial-gradient(circle at 50% 0%, #1a1d22 0%, var(--bg-base) 75%);
}

/* Tabular Numerals Mandatory for Data Consistency */
.tabular-nums,
.stat-value,
.stat-metric,
.price-tag,
.coord-text,
.altitude-badge,
.calc-result {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* Typography Classes */
.font-display {
  font-family: var(--font-display-title);
  letter-spacing: 0.04em;
}

.font-serif {
  font-family: var(--font-serif-heading);
}

.font-sans {
  font-family: var(--font-body);
}

/* Subtle Natural Mineral Grain */
.bg-grain {
  background-image: radial-gradient(rgba(15, 23, 42, 0.025) 1px, transparent 0);
  background-size: 24px 24px;
}

[data-theme="dark"] .bg-grain,
.dark .bg-grain {
  background-image: radial-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 0);
}

/* Solid Architectural Navbar */
.nav-solid {
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-caldera);
  transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease;
}

/* Emil Kowalski Snappy Micro-Interactions (<200ms) */
.interactive-tap {
  transition: transform 120ms cubic-bezier(0.2, 0, 0, 1), background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.interactive-tap:active {
  transform: scale(0.975);
}

.card-caldera {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-caldera);
  box-shadow: var(--card-shadow);
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 180ms ease, 
              background-color 180ms ease,
              box-shadow 180ms ease;
}

.card-caldera:hover {
  border-color: var(--border-caldera-strong);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

/* Button & Pill Styles - Zero Slop */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--volcanic-copper);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: background-color 140ms ease, transform 120ms ease, border-color 140ms ease;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: var(--volcanic-copper-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--bg-surface);
  color: var(--text-heading) !important;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  border: 1px solid var(--border-caldera-strong);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
  transition: background-color 140ms ease, transform 120ms ease, border-color 140ms ease;
  cursor: pointer;
  text-decoration: none;
}

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

.btn-secondary:active {
  transform: scale(0.98);
}

/* Category Filter Tabs */
.filter-tab {
  padding: 0.5rem 1.125rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border-caldera);
  color: var(--text-body);
  background-color: var(--bg-surface);
  cursor: pointer;
  transition: all 140ms ease;
}

.filter-tab:hover {
  color: var(--text-heading);
  background-color: var(--bg-subtle);
  border-color: var(--border-caldera-strong);
}

.filter-tab.active {
  color: #ffffff;
  background-color: var(--volcanic-copper);
  border-color: var(--volcanic-copper);
}

/* Route Pill Buttons */
.route-pill-btn {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border-caldera);
  color: var(--text-body);
  background-color: var(--bg-surface);
  cursor: pointer;
  transition: all 120ms ease;
}

.route-pill-btn:hover {
  color: var(--text-heading);
  background-color: var(--bg-subtle);
  border-color: var(--border-caldera-strong);
}

.route-pill-btn.active {
  color: #ffffff;
  background-color: var(--volcanic-copper);
  border-color: var(--volcanic-copper);
}

/* Lightbox Modal */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(16px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-container {
  max-width: 1100px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-caldera-strong);
  border-radius: 10px;
  overflow: hidden;
  transform: scale(0.98);
  transition: transform 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-overlay.active .lightbox-container {
  transform: scale(1);
}

.lightbox-img-wrapper {
  position: relative;
  width: 100%;
  height: 65vh;
  background-color: #0b0f17;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.lightbox-img-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 180ms ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-subtle);
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb,
.dark ::-webkit-scrollbar-thumb {
  background: #334155;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Focus States for Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--volcanic-copper);
  outline-offset: 2px;
}

/* Respect Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}