/* =============================================================
   KD2754 Rules - dark gaming theme
   -------------------------------------------------------------
   Design tokens live in :root so the whole palette can be tuned
   from a single place. Components are written mobile-first and
   progressively enhanced with media queries.
   ============================================================= */

:root {
  --color-bg:            #0b0d12;
  --color-bg-elevated:   #11141c;
  --color-bg-soft:       #161a24;
  --color-surface:       rgba(22, 26, 36, 0.85);
  --color-surface-hover: rgba(32, 38, 52, 0.95);
  --color-border:        rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text:          #e8ecf3;
  --color-text-muted:    #9aa3b2;
  --color-text-faint:    #6b7280;

  --color-accent:        #f6c453;
  --color-accent-soft:   rgba(246, 196, 83, 0.12);
  --color-accent-strong: #ffd97a;
  --color-danger:        #ef4444;
  --color-warning:       #f59e0b;
  --color-success:       #22c55e;

  --gradient-hero:
    radial-gradient(800px 400px at 80% -10%, rgba(246, 196, 83, 0.18), transparent 60%),
    radial-gradient(600px 300px at 0% 0%, rgba(80, 130, 255, 0.10), transparent 60%);

  --shadow-elev-1: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-elev-2: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-glow:   0 0 0 1px rgba(246, 196, 83, 0.35), 0 0 24px rgba(246, 196, 83, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --font-sans:    'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Orbitron', var(--font-sans);

  --container-max: 1100px;
  --header-height: 72px;

  --transition-fast: 0.18s ease;
  --transition-med:  0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background: var(--color-bg);
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-text);
  background:
    var(--gradient-hero),
    var(--color-bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: transparent;
}

input {
  font: inherit;
  color: inherit;
}

ol, ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  padding: 10px 16px;
  background: var(--color-accent);
  color: #1a1304;
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 12px;
}

/* ---------------------------------------------------------------
   Header + sticky language switcher
   --------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 13, 18, 0.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  text-decoration: none;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(246, 196, 83, 0.12), rgba(246, 196, 83, 0));
  border: 1px solid var(--color-border-strong);
}

.brand-mark svg {
  width: 28px;
  height: 28px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--color-accent-strong);
}

.brand-tagline {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* Language switcher */

.lang-switcher {
  position: relative;
}

.lang-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  color: var(--color-text);
  font-weight: 500;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.lang-button:hover,
.lang-button:focus-visible {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
  outline: none;
}

.lang-button .flag {
  width: 22px;
  height: 16px;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4);
  display: inline-block;
}

.lang-button .flag svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lang-button .caret {
  width: 16px;
  height: 16px;
  fill: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.lang-button[aria-expanded="true"] .caret {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  padding: 6px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elev-2);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.lang-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-align: left;
  color: var(--color-text);
  transition: background var(--transition-fast);
}

.lang-option:hover,
.lang-option:focus-visible {
  background: var(--color-surface);
  outline: none;
}

.lang-option.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.lang-option .flag {
  width: 22px;
  height: 16px;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4);
}

/* ---------------------------------------------------------------
   Hero
   --------------------------------------------------------------- */

.main-content {
  padding: 56px 20px 80px;
}

.hero {
  margin-bottom: 36px;
  text-align: left;
  max-width: 760px;
}

.hero-eyebrow {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-family: var(--font-display);
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid rgba(246, 196, 83, 0.3);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.5vw, 2.8rem);
  line-height: 1.15;
  margin: 18px 0 14px;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, #fff 10%, #f6c453 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0;
}

/* ---------------------------------------------------------------
   Banner (translation pending)
   --------------------------------------------------------------- */

.banner {
  margin-bottom: 24px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: 0.92rem;
}

.banner-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fcd998;
}

.banner strong {
  color: var(--color-warning);
  margin-right: 6px;
}

/* ---------------------------------------------------------------
   Toolbar (search + expand all)
   --------------------------------------------------------------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.search {
  position: relative;
  flex: 1 1 280px;
  min-width: 0;
}

.search-icon {
  position: absolute;
  top: 50%;
  left: 14px;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  fill: var(--color-text-faint);
  pointer-events: none;
  z-index: 1;
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.search-input::placeholder {
  color: var(--color-text-faint);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface-hover);
}

.ghost-button {
  padding: 10px 18px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-weight: 500;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.ghost-button:hover,
.ghost-button:focus-visible {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
  outline: none;
}

/* ---------------------------------------------------------------
   Accordion
   --------------------------------------------------------------- */

.accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 120px;
  padding: 24px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  font-weight: 500;
}

.accordion-loading-spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--color-border-strong);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.accordion-error {
  margin: 0;
  padding: 20px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.4);
  border-radius: var(--radius-md);
  color: #fecaca;
}

.category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.category:hover {
  border-color: var(--color-border-strong);
}

.category.is-hidden {
  display: none;
}

.category-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  transition: background var(--transition-fast);
}

.category-header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.category-header[aria-expanded="true"] {
  background: rgba(246, 196, 83, 0.04);
}

.category-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(246, 196, 83, 0.16), rgba(246, 196, 83, 0));
  border: 1px solid rgba(246, 196, 83, 0.3);
  color: var(--color-accent);
}

.category-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.category-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.category-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.category-description {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.category-meta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.category-count {
  display: inline-grid;
  place-items: center;
  min-width: 32px;
  height: 28px;
  padding: 0 10px;
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  border: 1px solid rgba(246, 196, 83, 0.3);
}

.chevron {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-muted);
  transition: transform var(--transition-med), background var(--transition-fast), color var(--transition-fast);
}

.chevron svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.category-header[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.category-panel {
  padding: 4px 20px 22px;
  border-top: 1px solid var(--color-border);
  animation: panelIn var(--transition-med);
}

@keyframes panelIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.rules {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.rule {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 16px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.rule:hover {
  border-color: rgba(246, 196, 83, 0.35);
  background: rgba(28, 32, 44, 0.95);
}

.rule.is-hidden {
  display: none;
}

.rule-index {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  align-self: start;
  padding-top: 2px;
}

.rule-body {
  min-width: 0;
}

.rule-title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.rule-description {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---------------------------------------------------------------
   Empty state + footer
   --------------------------------------------------------------- */

.empty-state {
  margin-top: 24px;
  padding: 30px;
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
}

.site-footer {
  margin-top: 60px;
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  background: rgba(11, 13, 18, 0.6);
}

.site-footer-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
}

.footer-credits {
  margin: 0;
  color: var(--color-text);
  font-weight: 500;
}

.footer-note {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ---------------------------------------------------------------
   Responsive tuning
   --------------------------------------------------------------- */

@media (max-width: 720px) {
  .main-content {
    padding: 36px 16px 60px;
  }

  .container {
    padding: 0 16px;
  }

  .brand-tagline {
    display: none;
  }

  .lang-button {
    padding: 8px 12px;
  }

  .lang-button .lang-current {
    display: none;
  }

  .lang-menu {
    right: 0;
    left: auto;
  }

  .category-header {
    padding: 16px;
    gap: 12px;
    grid-template-columns: auto 1fr auto;
  }

  .category-icon {
    width: 38px;
    height: 38px;
  }

  .category-icon svg {
    width: 20px;
    height: 20px;
  }

  .category-description {
    display: none;
  }

  .category-panel {
    padding: 4px 14px 18px;
  }

  .rule {
    padding: 14px;
    gap: 12px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  /*
   * In column flex, flex-basis applies to HEIGHT. A basis of 280px on .search was
   * stretching the wrapper to ~280px tall while the input stayed one line tall,
   * so the lens icon (position: absolute; top: 50%) floated in empty space.
   */
  .search {
    flex: 0 0 auto;
    width: 100%;
    min-width: 0;
    align-self: stretch;
  }

  .search-icon {
    left: 12px;
  }

  .search-input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px 12px 40px;
    font-size: 16px;
    /* iOS: 16px+ avoids zoom-on-focus; keeps tap target readable */
    -webkit-appearance: none;
    appearance: none;
  }

  .search-input::-webkit-search-decoration,
  .search-input::-webkit-search-cancel-button,
  .search-input::-webkit-search-results-button,
  .search-input::-webkit-search-results-decoration {
    -webkit-appearance: none;
    appearance: none;
  }

  .ghost-button {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .hero-title {
    font-size: 1.7rem;
  }

  .category-count {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}