/* =========================================================
   Design tokens — supplied verbatim from CLAUDE.md
   The original game expected these from the artifact preview env.
   ========================================================= */
:root {
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;

  /* Text */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-text-success: #2d8659;
  --color-text-warning: #b87333;
  --color-text-danger: #c0392b;
  --color-text-info: #2c5f9e;

  /* Backgrounds */
  --color-background-primary: #ffffff;
  --color-background-secondary: #f5f4f0;
  --color-background-success: #e6f4ec;
  --color-background-warning: #fbf0e1;
  --color-background-danger: #fbe6e3;
  --color-background-info: #e3edf7;

  /* Borders */
  --color-border-primary: #1a1a1a;
  --color-border-secondary: #c4c2bc;
  --color-border-tertiary: #e5e3dd;

  /* Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
}

/* =========================================================
   Base reset + page wrapper
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-background-secondary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.55;
  font-size: 16px;
}

.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;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

@media (max-width: 600px) {
  .page { padding: 32px 16px 56px; }
}

/* Header */
.page-header {
  text-align: center;
  margin-bottom: 28px;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 500;
  letter-spacing: -0.5px;
  margin: 0 0 4px;
  color: var(--color-text-primary);
}

.page-header .tagline {
  margin: 0;
  font-size: 15px;
  color: var(--color-text-secondary);
  letter-spacing: 0.2px;
}

@media (max-width: 600px) {
  .page-header h1 { font-size: 32px; }
  .page-header .tagline { font-size: 14px; }
}

/* Section spacing */
.page > section,
.page > .ad-slot,
.page > .bmc-wrap {
  margin-top: 40px;
}

.page h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 12px;
  color: var(--color-text-primary);
  letter-spacing: -0.2px;
}

.page p {
  margin: 0 0 12px;
  color: var(--color-text-primary);
}

.page p:last-child { margin-bottom: 0; }

/* How to play list */
.how-to ul {
  margin: 0;
  padding: 0 0 0 20px;
  color: var(--color-text-primary);
}

.how-to li {
  margin: 0 0 6px;
  line-height: 1.5;
}

.how-to li:last-child { margin-bottom: 0; }

/* How it works prose */
.how-it-works p {
  color: var(--color-text-primary);
  font-size: 16px;
  line-height: 1.6;
}

/* =========================================================
   Joke ad slot (the bit)
   ========================================================= */
.ad-slot {
  position: relative;
  border: 1px dashed var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  background: var(--color-background-primary);
  padding: 28px 22px 22px;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.55;
}

.ad-slot::before {
  content: "Ad slot";
  position: absolute;
  top: 8px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  opacity: 0.7;
}

.ad-slot p {
  margin: 0 0 4px;
  color: var(--color-text-secondary);
}

.ad-slot p:last-child { margin-bottom: 0; }

.ad-slot a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-decoration-thickness: 0.5px;
  text-underline-offset: 2px;
}

/* =========================================================
   Buy Me a Coffee link
   ========================================================= */
.bmc-wrap {
  text-align: center;
}

.bmc-link {
  display: inline-block;
  padding: 10px 18px;
  background: var(--color-background-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.bmc-link:hover {
  border-color: var(--color-border-secondary);
  background: var(--color-background-secondary);
}

/* =========================================================
   Footer
   ========================================================= */
.page-footer {
  margin-top: 56px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.page-footer a {
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 0.5px solid var(--color-border-secondary);
  padding-bottom: 1px;
}

.page-footer a:hover {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-border-primary);
}

/* =========================================================
   Generic button reset for in-game buttons
   ========================================================= */
button {
  font-family: var(--font-sans);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: var(--border-radius-md);
  border: 0.5px solid var(--color-border-secondary);
  background: var(--color-background-primary);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

button:hover:not(:disabled) {
  background: var(--color-background-secondary);
  border-color: var(--color-border-primary);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* =========================================================
   Game styles — verbatim from caffeine_rush_game_v5.html
   (Source lines 1–54 of the original <style> block.)
   ========================================================= */
.cgame { padding: 1rem 0; font-family: var(--font-sans); }
.cgame-hud { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 13px; color: var(--color-text-secondary); flex-wrap: wrap; }
.cgame-hud strong { color: var(--color-text-primary); font-weight: 500; }
.cgame-bar { flex: 1; min-width: 80px; max-width: 170px; height: 8px; background: var(--color-background-secondary); border-radius: 4px; overflow: hidden; position: relative; }
.cgame-bar-fill { height: 100%; background: var(--color-text-success); transition: width 0.25s linear, background 0.3s; width: 100%; }
.cgame-bar-fill.low { background: var(--color-text-warning); }
.cgame-bar-fill.crit { background: var(--color-text-danger); }
.cgame-bar-threshold { position: absolute; left: 50%; top: -2px; bottom: -2px; width: 1px; background: var(--color-text-secondary); opacity: 0.6; pointer-events: none; }
.cgame-state { padding: 2px 10px; border-radius: var(--border-radius-md); font-size: 12px; font-weight: 500; background: var(--color-background-success); color: var(--color-text-success); transition: background 0.3s, color 0.3s; min-width: 110px; text-align: center; }
.cgame-state.drowsy { background: var(--color-background-info); color: var(--color-text-info); }
.cgame-state.crit { background: var(--color-background-danger); color: var(--color-text-danger); }
.cgame-arena { position: relative; }
.cgame-svg { background: var(--color-background-secondary); border-radius: var(--border-radius-lg); display: block; width: 100%; outline: 2px solid transparent; outline-offset: -2px; transition: outline-color 0.2s, background 0.6s ease; }

/* Time-of-day progression — playfield bg shifts to match each level's name. */
.cgame-svg.level-morning {
  background: linear-gradient(180deg, #f9f5e9 0%, #f5f4f0 100%);
}
.cgame-svg.level-afternoon {
  background: linear-gradient(180deg, #f7e8c5 0%, #ecd5a2 100%);
}
.cgame-svg.level-night {
  background: linear-gradient(180deg, #1f1c3a 0%, #2c2750 100%);
}
.cgame-svg.level-night .ts {
  fill: #b5b0d6;
}
/* Soften the membrane deco (drawn with literal hex) so it stays visible on dark bg */
.cgame-svg.level-night #cg-membrane-deco { opacity: 0.55; }
.cgame-svg.level-night rect[fill="#888780"] { fill: #6a6788; }
.cgame-svg.danger { animation: cgDanger 0.7s ease-in-out infinite; }
@keyframes cgDanger { 0%, 100% { outline-color: var(--color-text-danger); } 50% { outline-color: transparent; } }
.receptor[data-status="empty"] { cursor: pointer; }
.receptor[data-status="empty"]:hover .receptor-arm { stroke: var(--color-border-primary); stroke-width: 1; }
.receptor .bound-caffeine, .receptor .bound-adenosine { opacity: 0; transition: opacity 0.2s; }
.receptor[data-status="caffeine"] .bound-caffeine { opacity: 1; }
.receptor[data-status="adenosine"] .bound-adenosine { opacity: 1; }
.receptor[data-status="pending"] .bound-caffeine { opacity: 0.3; }
.receptor[data-status="pending"] .receptor-arm { stroke: #D85A30; stroke-width: 1; }
.receptor.expiring .bound-caffeine { animation: cgPulse 0.6s ease-in-out infinite; }
.receptor.entering { animation: cgEnter 0.5s ease-out both; }
@keyframes cgPulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes cgEnter { from { opacity: 0; } to { opacity: 1; } }
@keyframes bgD1 { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(14px, -10px); } }
@keyframes bgD2 { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-12px, 14px); } }
@keyframes bgD3 { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(10px, 12px); } }
@keyframes bgD4 { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-14px, -12px); } }
@keyframes bgPulse { 0%, 100% { opacity: 0.32; r: 6; } 50% { opacity: 0.55; r: 7; } }
@media (prefers-reduced-motion: no-preference) {
  .bg-drift-1 { animation: bgD1 3.4s ease-in-out infinite; transform-origin: center; }
  .bg-drift-2 { animation: bgD2 4.2s ease-in-out infinite; transform-origin: center; }
  .bg-drift-3 { animation: bgD3 3.8s ease-in-out infinite; transform-origin: center; }
  .bg-drift-4 { animation: bgD4 4.6s ease-in-out infinite; transform-origin: center; }
  #cg-dispenser-pulse { animation: bgPulse 1.6s ease-in-out infinite; }
}
.cgame-bottom { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 12px; padding: 0 4px; font-size: 13px; color: var(--color-text-secondary); flex-wrap: wrap; }
.cgame-mug-svg { flex-shrink: 0; color: var(--color-text-primary); }
.cgame-mug-liquid { transition: transform 0.4s ease; transform-origin: 0 0; }
.cgame-drink { /* centered with the rest */ }
.cgame-overlay { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.45); display: flex; align-items: center; justify-content: center; border-radius: var(--border-radius-lg); opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.cgame-overlay.show { opacity: 1; pointer-events: auto; }
.cgame-overlay-card { background: var(--color-background-primary); border-radius: var(--border-radius-lg); padding: 20px 28px; text-align: center; border: 0.5px solid var(--color-border-tertiary); min-width: 220px; }
.cgame-overlay-title { font-size: 18px; font-weight: 500; margin: 0 0 6px; color: var(--color-text-primary); }
.cgame-overlay-sub { font-size: 14px; color: var(--color-text-secondary); margin: 0 0 14px; }
.cgame-banner { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.92); background: rgba(20, 20, 20, 0.82); color: #fff; padding: 14px 36px; border-radius: var(--border-radius-lg); font-size: 22px; font-weight: 500; opacity: 0; pointer-events: none; transition: opacity 0.4s, transform 0.4s; letter-spacing: 0.3px; }
.cgame-banner.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.cgame-banner-sub { display: block; font-size: 13px; font-weight: 400; opacity: 0.8; margin-top: 4px; }
.cgame-warn { position: absolute; top: 14px; left: 50%; transform: translate(-50%, 0); background: var(--color-background-danger); color: var(--color-text-danger); padding: 4px 14px; border-radius: var(--border-radius-md); font-size: 12px; font-weight: 500; opacity: 0; pointer-events: none; white-space: nowrap; transition: opacity 0.2s; }
.cgame-warn.show { opacity: 1; }

/* The original game's <text class="ts"> labels did not have an explicit
   .ts rule in the source style block. Add a sane default so the labels
   actually render with the right size/color outside the artifact env. */
.cgame-svg .ts {
  font-family: var(--font-sans);
  font-size: 11px;
  fill: var(--color-text-secondary);
}

/* =========================================================
   Game-over score submit form (inside .cgame-overlay-card)
   ========================================================= */
.cgame-submit {
  display: flex;
  gap: 6px;
  margin: 14px 0 6px;
}

.cgame-name-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 6px 10px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  background: var(--color-background-primary);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color 0.15s;
}

.cgame-name-input:focus {
  border-color: var(--color-border-primary);
}

#cg-submit-btn {
  flex-shrink: 0;
  font-size: 13px;
}

.cgame-submit-status {
  font-size: 12px;
  min-height: 18px;
  margin: 4px 0 8px;
  color: var(--color-text-secondary);
}

.cgame-submit-status.success { color: var(--color-text-success); }
.cgame-submit-status.error   { color: var(--color-text-danger); }

.cgame-submit.hidden { display: none; }

.cgame-overlay-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  justify-content: center;
}

.cgame-share {
  font-size: 13px;
  background: var(--color-text-primary);
  color: var(--color-background-primary);
  border-color: var(--color-text-primary);
}
.cgame-share:hover:not(:disabled) {
  background: var(--color-text-primary);
  border-color: var(--color-text-primary);
  opacity: 0.85;
}
.cgame-share.copied {
  background: var(--color-text-success);
  border-color: var(--color-text-success);
}

.cgame-play-again {
  /* sits next to .cgame-share in the actions row */
}

/* =========================================================
   Leaderboard
   ========================================================= */
.leaderboard-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.leaderboard-head h2 {
  margin: 0;
}

.leaderboard-refresh {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  color: var(--color-text-secondary);
  background: transparent;
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.leaderboard-refresh:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border-secondary);
  background: var(--color-background-primary);
}

.leaderboard-refresh:disabled {
  opacity: 0.5;
  cursor: progress;
}

/* Filter tabs (All / Mobile / Desktop) */
.leaderboard-filter {
  display: inline-flex;
  margin: 0 0 10px;
  padding: 2px;
  background: var(--color-background-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
}

.lb-filter-btn {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.02em;
  padding: 5px 12px;
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.lb-filter-btn:hover:not(.active) {
  color: var(--color-text-primary);
}

.lb-filter-btn.active {
  background: var(--color-text-primary);
  color: var(--color-background-primary);
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
  background: var(--color-background-primary);
  overflow: hidden;
}

.leaderboard-list li {
  display: grid;
  grid-template-columns: 36px 1fr auto auto auto;
  gap: 12px;
  align-items: baseline;
  padding: 10px 14px;
  border-bottom: 0.5px solid var(--color-border-tertiary);
  font-size: 14px;
}

.leaderboard-list li:last-child { border-bottom: none; }

.leaderboard-rank {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.leaderboard-list li.top1 .leaderboard-rank,
.leaderboard-list li.top1 .leaderboard-name { color: var(--color-text-primary); font-weight: 500; }

.leaderboard-name {
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-level {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.leaderboard-score {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.leaderboard-empty,
.leaderboard-error {
  display: block !important;
  grid-template-columns: none !important;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 13px;
  padding: 20px 14px;
}

.leaderboard-error { color: var(--color-text-danger); }

.leaderboard-list li.you {
  background: var(--color-background-warning);
}

/* Platform pip — small mono letter pill ("M" for mobile, "D" for desktop) */
.leaderboard-platform {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 0.5px solid var(--color-border-tertiary);
  color: var(--color-text-secondary);
  background: var(--color-background-secondary);
}
.leaderboard-platform.pf-m {
  color: var(--color-text-info);
  background: var(--color-background-info);
  border-color: var(--color-background-info);
}
.leaderboard-platform.pf-d {
  color: var(--color-text-secondary);
  background: var(--color-background-secondary);
  border-color: var(--color-border-tertiary);
}
.leaderboard-platform.pf-unknown {
  /* legacy rows with no platform info — show a tiny dash so the cell isn't empty */
  border: none;
  background: transparent;
}
.leaderboard-platform.pf-unknown::after { content: "·"; color: var(--color-border-secondary); }

@media (max-width: 480px) {
  .leaderboard-list li {
    grid-template-columns: 28px 1fr auto auto;
    gap: 10px;
    padding: 9px 12px;
  }
  .leaderboard-level { display: none; }
}

/* =========================================================
   Welcome modal — full-page overlay shown on first visit
   ========================================================= */
.welcome-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 20, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
  animation: welcomeFade 0.25s ease-out both;
}

.welcome-overlay[hidden] { display: none; }

@keyframes welcomeFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.welcome-card {
  background: var(--color-background-primary);
  border-radius: var(--border-radius-lg);
  padding: 32px 28px 24px;
  max-width: 440px;
  width: 100%;
  border: 0.5px solid var(--color-border-tertiary);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}

.welcome-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 500;
  margin: 0 0 4px;
  color: var(--color-text-primary);
  letter-spacing: -0.4px;
}

.welcome-sub {
  margin: 0 0 18px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.welcome-list {
  margin: 0 0 22px;
  padding: 0 0 0 20px;
  color: var(--color-text-primary);
  font-size: 14.5px;
  line-height: 1.55;
}

.welcome-list li { margin-bottom: 8px; }
.welcome-list li:last-child { margin-bottom: 0; }

.welcome-list .caf-pip,
.welcome-list .aden-pip {
  font-weight: 500;
  border-radius: 3px;
  padding: 0 4px;
  color: var(--color-background-primary);
}
.welcome-list .caf-pip   { background: #D85A30; }
.welcome-list .aden-pip  { background: #7F77DD; }

.welcome-cta {
  width: 100%;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 16px;
  background: var(--color-text-primary);
  color: var(--color-background-primary);
  border: 0.5px solid var(--color-text-primary);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: opacity 0.15s;
}

.welcome-cta:hover { opacity: 0.85; }

/* =========================================================
   Tip prompt — kiosk POS-style "Leave a tip?"
   ========================================================= */
.tip-prompt {
  background: var(--color-background-primary);
  border: 1px solid var(--color-border-secondary);
  border-radius: var(--border-radius-lg);
  padding: 24px 22px 18px;
  text-align: center;
  box-shadow: 0 1px 0 var(--color-border-tertiary);
}

.tip-prompt-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin: 0 0 14px;
}

.tip-prompt-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

.tip-btn,
.tip-btn-custom {
  display: block;
  text-decoration: none;
  font-family: var(--font-sans);
  text-align: center;
  padding: 14px 8px;
  background: var(--color-text-info);
  color: #fff;
  border-radius: var(--border-radius-md);
  border: 0.5px solid var(--color-text-info);
  transition: background 0.15s, transform 0.05s;
  cursor: pointer;
  user-select: none;
}

.tip-btn:hover,
.tip-btn-custom:hover { background: #214c80; }

.tip-btn:active,
.tip-btn-custom:active { transform: translateY(1px); }

.tip-btn-pct {
  display: block;
  font-size: 22px;
  font-weight: 500;
  line-height: 1.1;
}
.tip-btn-amt {
  display: block;
  font-size: 12px;
  opacity: 0.85;
  margin-top: 2px;
}

.tip-btn-custom {
  font-size: 13px;
  font-weight: 500;
  padding: 10px 8px;
}

.tip-prompt-hint {
  margin: 14px 0 0;
  font-style: italic;
  font-size: 11px;
  color: var(--color-text-secondary);
  opacity: 0.75;
}

/* =========================================================
   Level countdown bar (in HUD area)
   ========================================================= */
.cgame-level-timer-wrap {
  height: 2px;
  background: var(--color-background-secondary);
  border-radius: 1px;
  overflow: hidden;
  margin: 0 0 10px;
  transition: opacity 0.2s;
}

.cgame-level-timer-wrap.hidden { opacity: 0; pointer-events: none; }

.cgame-level-timer {
  height: 100%;
  width: 0;
  background: var(--color-text-secondary);
  opacity: 0.4;
  transition: width 0.25s linear;
}

/* =========================================================
   Inter-level intermission overlay
   ========================================================= */
.cgame-intermission {
  /* extends .cgame-overlay - already positioned absolute, hidden */
}

.intermission-card {
  min-width: 280px;
  max-width: 420px;
}

.intermission-level {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.intermission-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.2px;
}

.intermission-fact {
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-text-primary);
  margin: 0 0 18px;
  font-style: italic;
}

.intermission-timer {
  height: 3px;
  background: var(--color-background-secondary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 14px;
}

.intermission-timer-fill {
  height: 100%;
  width: 100%;
  background: var(--color-text-primary);
  transition: width 0.1s linear;
}

.intermission-skip {
  font-size: 13px;
}

/* =========================================================
   Mini leaderboard (inside game-over overlay)
   ========================================================= */
.leaderboard-mini {
  background: var(--color-background-secondary);
  border-radius: var(--border-radius-md);
  padding: 10px 12px;
  margin: 10px 0 4px;
  text-align: left;
}

.leaderboard-mini-head {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.leaderboard-mini-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.leaderboard-mini-list li {
  display: grid;
  grid-template-columns: 22px 1fr auto auto;
  gap: 10px;
  align-items: baseline;
  padding: 4px 0;
  font-size: 13px;
}

.leaderboard-mini-list li + li {
  border-top: 0.5px solid var(--color-border-tertiary);
}

.leaderboard-mini-list .lm-rank {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-secondary);
}

.leaderboard-mini-list .lm-name {
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-mini-list .lm-score {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-text-primary);
  font-size: 13px;
}

.leaderboard-mini-empty {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 12px;
  padding: 6px 0;
  display: block !important;
  grid-template-columns: none !important;
}

.leaderboard-mini.hidden { display: none; }

/* =========================================================
   Collapsible "How to play" (replaces section.how-to)
   ========================================================= */
.how-to-details {
  border-top: 0.5px solid var(--color-border-tertiary);
  border-bottom: 0.5px solid var(--color-border-tertiary);
  padding: 14px 0;
  /* override default .page > section margin so it stays consistent */
  margin-top: 40px;
}

.how-to-details > summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}

.how-to-details > summary::-webkit-details-marker { display: none; }

.how-to-details > summary::before {
  content: "▶";
  display: inline-block;
  font-size: 10px;
  color: var(--color-text-secondary);
  transition: transform 0.2s;
}

.how-to-details[open] > summary::before {
  transform: rotate(90deg);
}

.how-to-details ul {
  margin: 12px 0 0;
  padding: 0 0 0 20px;
  color: var(--color-text-primary);
  font-size: 15px;
  line-height: 1.55;
}

.how-to-details li { margin-bottom: 6px; }
.how-to-details li:last-child { margin-bottom: 0; }

/* =========================================================
   Mobile tweaks
   ========================================================= */
@media (max-width: 480px) {
  .tip-prompt { padding: 20px 16px 14px; }
  .tip-btn { padding: 12px 4px; }
  .tip-btn-pct { font-size: 18px; }

  .welcome-card {
    padding: 24px 22px 20px;
  }
  .welcome-title { font-size: 24px; }
}