/* ============================================
   SITI ARCHEOLOGICI VR - MINIMAL DESIGN SYSTEM
   ============================================ */

/* CSS Variables - Minimal Design Tokens */
:root {
  /* Colors - Clean Dark Theme */
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-tertiary: #1a1a1a;
  --color-bg-card: rgba(20, 20, 20, 0.95);
  --color-bg-overlay: rgba(0, 0, 0, 0.9);

  /* Accent - Subtle Gold */
  --color-accent-primary: #c9a857;
  --color-accent-secondary: #a08540;
  --color-accent-tertiary: #7a6a45;
  --color-accent-glow: rgba(201, 168, 87, 0.15);

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.65);
  --color-text-muted: rgba(255, 255, 255, 0.4);
  --color-text-accent: var(--color-accent-primary);

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-accent: rgba(201, 168, 87, 0.2);

  /* Shadows - Minimal */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-glow: none;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.75rem;
  --text-4xl: 2rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Border Radius - Subtle */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;

  /* Transitions - Snappy */
  --transition-fast: 100ms ease;
  --transition-base: 150ms ease;
  --transition-slow: 250ms ease;

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
  --z-max: 999;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography - Clean */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.3;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--text-4xl);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.8;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--color-text-accent);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Buttons - Minimal */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

.btn-primary:hover {
  background: var(--color-accent-secondary);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.btn-icon:hover {
  border-color: var(--color-accent-primary);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Cards - Clean */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--color-border-accent);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.card-body {
  padding: var(--space-4);
}

.card-title {
  font-size: var(--text-base);
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.card-subtitle {
  font-size: var(--text-xs);
  color: var(--color-accent-primary);
  margin-bottom: var(--space-2);
}

.card-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {

  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* Animations - Minimal */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease forwards;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Scrollbar - Hidden */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
}

/* Selection */
::selection {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

/* Focus States */
:focus-visible {
  outline: 1px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* Landing Header - Minimal */
.landing-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
}

.landing-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--color-accent-primary);
}

/* Hero - Minimal */
.hero {
  min-height: 40vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-4);
  padding-top: calc(var(--space-16) + 60px);
}

.hero h1 {
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.hero p {
  max-width: 480px;
  font-size: var(--text-base);
  margin-bottom: var(--space-6);
}

/* Sites Section */
.sites-section {
  padding: var(--space-12) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-8);
  font-weight: 400;
}

.section-title span {
  color: var(--color-accent-primary);
}

/* Tour Card */
.tour-card {
  cursor: pointer;
}

.tour-card .card-image {
  position: relative;
}

.tour-card .panorama-count {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  z-index: 1;
  background: var(--color-bg-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-6) 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --text-4xl: 1.75rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.25rem;
  }

  .hero {
    min-height: 35vh;
    padding: var(--space-10) var(--space-4);
    padding-top: calc(var(--space-10) + 50px);
  }

  .btn {
    width: 100%;
  }
}