/*
  Dark theme stylesheet for Vulkan Vegas landing page
  - Uses CSS variables for colors and spacing
  - Fully responsive (mobile-first)
  - Accessibility: high contrast, focus states, readable tables on mobile
  - Components covered:
    * Layout container and typography
    * Header with navigation and CTA
    * Breadcrumbs
    * Hero banner with centered semi-transparent CTA overlay
    * Slots grid (12 items, 6 per row on desktop)
    * Article content and responsive tables
    * Footer with payment logos
*/

:root {
  /* Color tokens */
  --color-bg: #0c0f14;
  --color-surface: #121620;
  --color-overlay: rgba(0, 0, 0, 0.55);
  --color-text: #e6ecf2;
  --color-subtle: #a7b0bc;
  --color-primary: #ff2e6a;
  --color-primary-contrast: #0b0d12;
  --color-accent: #4dd2ff;
  --color-border: #2a3342;
  --color-focus: #ffd166;

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --size-1: 0.875rem;
  --size-2: 1rem;
  --size-3: 1.25rem;
  --size-4: 1.5rem;
  --size-5: 2rem;
  --size-6: 2.5rem;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;

  /* Layout */
  --container: 1200px;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(12, 15, 20, 0.8);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-1);
}

.brand img {
  height: 45px;
  width: auto;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.6));
}

.site-nav .nav-list {
  list-style: none;
  display: none;
  padding: 0;
  margin: 0;
  gap: var(--space-4);
}

.nav-link {
  color: var(--color-text);
}

.header-cta .btn {
  margin-left: var(--space-2);
  height: 34px;
  padding: 0 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .site-nav .nav-list { display: flex; }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 700;
  background: var(--color-surface);
  color: var(--color-text);
}

.btn:hover { filter: brightness(1.08); text-decoration: none; }

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

.btn-cta {
  background: linear-gradient(135deg, var(--color-primary), #ff6a88 60%);
  color: #0a0c10;
  border: none;
}

/* Breadcrumbs */
.breadcrumbs {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.breadcrumb-list {
  display: flex;
  gap: var(--space-2);
  padding-block: var(--space-2);
  list-style: none;
  margin: 0;
}

.breadcrumb-item { color: var(--color-subtle); }
.breadcrumb-item a { color: var(--color-text); }
.breadcrumb-item+.breadcrumb-item::before {
  content: "/";
  margin-inline: var(--space-1);
  color: var(--color-subtle);
}

/* Hero */
.hero {
  position: relative;
  isolation: isolate;
}

.hero-img {
  width: 100%;
  height: clamp(220px, 48vw, 540px);
  object-fit: cover;
  object-position: center;
  display: block;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(to bottom, transparent 30%, var(--color-overlay));
}

.hero-overlay-inner {
  background: rgba(0, 0, 0, 0.55);
  padding: var(--space-5);
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
}

.hero-title {
  margin: 0 0 var(--space-2) 0;
  font-size: clamp(var(--size-4), 3.5vw, var(--size-6));
}

.hero-subtitle {
  margin: 0 0 var(--space-3) 0;
  color: var(--color-subtle);
}

/* Sections */
.section {
  padding-block: var(--space-6);
}

/* Slots grid */
.slots-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

/* 6 per row on desktop */
@media (min-width: 1024px) {
  .slots-grid { grid-template-columns: repeat(6, 1fr); }
}

.slot-card {
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: #0e121a;
}

.slot-card img { display: block; border-radius: var(--radius); }

/* Article and content */
.article {
  padding-block: var(--space-6);
  display: grid;
  gap: var(--space-5);
}

.content-section h2 { margin-top: 0; }

.table-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
}

.responsive-table thead td {
  background: #0d121a;
  color: var(--color-subtle);
  font-weight: 700;
}

.responsive-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

/* Mobile table adaptation: stack rows with labels */
@media (max-width: 680px) {
  .responsive-table thead { display: none; }
  .responsive-table tr { display: block; padding: var(--space-2) var(--space-3); }
  .responsive-table tr + tr { border-top: 1px solid var(--color-border); }
  .responsive-table td { display: block; padding: var(--space-2) 0; border-bottom: none; }
  .responsive-table td::before {
    content: attr(data-label);
    display: block;
    color: var(--color-subtle);
    font-weight: 600;
    margin-bottom: 0.25rem;
  }
}

/* Footer */
.site-footer {
  background: #0b0e13;
  border-top: 1px solid var(--color-border);
}

.payments-list {
  list-style: none;
  padding: var(--space-4) 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  align-items: center;
}

@media (min-width: 768px) {
  .payments-list { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

.payments-list img {
  max-height: 28px;
  margin-inline: auto;
  filter: grayscale(0.1) contrast(1.05);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-5);
  border-top: 1px solid var(--color-border);
  color: var(--color-subtle);
}

.footer-link { margin-right: var(--space-3); color: var(--color-subtle); }
.footer-link:hover { color: var(--color-text); text-decoration: none; }

/* Screen lock hint: body overflow hidden can be toggled by JS when on mobile */
.lock-screen { overflow: hidden; height: 100vh; }

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