/*
 * ribbit.css — site chrome and game styling for The Ribbit Game.
 * Built entirely on the gamekit design tokens (--gk-*) defined in gamekit.css,
 * so light/dark mode follow the shared palette automatically. Mobile-first.
 */

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

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

body {
  margin: 0;
  font-family: var(--gk-font-sans);
  font-size: var(--gk-fs-md);
  line-height: 1.55;
  color: var(--gk-ink);
  background: var(--gk-bg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

h1,
h2,
h3 {
  font-family: var(--gk-font-display);
  line-height: 1.2;
  color: var(--gk-ink);
}

h1 {
  font-size: var(--gk-fs-2xl);
  margin: 0 0 var(--gk-space-3);
}

h2 {
  font-size: var(--gk-fs-xl);
  margin: var(--gk-space-6) 0 var(--gk-space-3);
}

a {
  color: var(--gk-accent);
}

a:hover {
  color: var(--gk-accent-strong);
}

main {
  flex: 1 0 auto;
  width: 100%;
}

.wrap {
  width: 100%;
  max-width: var(--gk-maxw);
  margin: 0 auto;
  padding-left: max(var(--gk-space-4), env(safe-area-inset-left));
  padding-right: max(var(--gk-space-4), env(safe-area-inset-right));
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gk-accent);
  color: var(--gk-accent-contrast);
  padding: var(--gk-space-2) var(--gk-space-4);
  border-radius: var(--gk-radius-sm);
  z-index: 100;
}

.skip-link:focus {
  left: var(--gk-space-3);
  top: var(--gk-space-3);
}

/* ----- buttons ----- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--gk-tap);
  padding: 0 var(--gk-space-5);
  border-radius: var(--gk-radius-pill);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--gk-transition), border-color var(--gk-transition), color var(--gk-transition);
}

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

.btn-primary:hover {
  background: var(--gk-accent-strong);
  color: var(--gk-accent-contrast);
}

.btn-ghost {
  background: var(--gk-surface);
  border-color: var(--gk-line-strong);
  color: var(--gk-ink);
}

.btn-ghost:hover {
  background: var(--gk-surface-2);
  color: var(--gk-ink);
}

.btn:focus-visible {
  outline: 3px solid var(--gk-accent);
  outline-offset: 2px;
}

/* ----- header / nav ----- */

.site-header {
  background: var(--gk-surface);
  border-bottom: 1px solid var(--gk-line);
  position: sticky;
  top: 0;
  z-index: 40;
  padding-top: env(safe-area-inset-top);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--gk-space-3);
  min-height: 60px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--gk-space-2);
  text-decoration: none;
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: 700;
  margin-right: auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--gk-radius-sm);
  background: var(--gk-accent);
  color: var(--gk-accent-contrast);
  font-weight: 800;
}

.brand-name {
  font-size: var(--gk-fs-lg);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: var(--gk-tap);
  height: var(--gk-tap);
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--gk-ink);
  border-radius: 2px;
}

.site-nav {
  display: none;
  width: 100%;
  flex-direction: column;
  gap: var(--gk-space-1);
  padding-bottom: var(--gk-space-3);
}

.site-nav.open {
  display: flex;
}

.site-nav a {
  padding: var(--gk-space-3);
  border-radius: var(--gk-radius-sm);
  text-decoration: none;
  color: var(--gk-ink);
  font-weight: 600;
}

.site-nav a:hover {
  background: var(--gk-surface-2);
}

.site-nav a.active {
  color: var(--gk-accent);
}

.header-account {
  margin-left: auto;
}

.header-account[hidden] {
  display: none;
}

@media (min-width: 820px) {
  .nav-toggle {
    display: none;
  }
  .site-nav {
    display: flex;
    flex-direction: row;
    width: auto;
    align-items: center;
    gap: var(--gk-space-1);
    padding-bottom: 0;
  }
  .header-account {
    margin-left: var(--gk-space-3);
  }
}

/* ----- sections ----- */

.hero {
  padding: var(--gk-space-7) 0 var(--gk-space-4);
  text-align: center;
}

.hero-sub {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-lg);
  max-width: 62ch;
  margin: 0 auto;
}

.copy-section {
  padding: var(--gk-space-5) 0 var(--gk-space-6);
  max-width: 78ch;
}

.copy-section p {
  color: var(--gk-ink);
}

.cta-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-3);
  margin: var(--gk-space-4) 0;
}

.feature-list,
.howto-steps,
.rank-list,
.tip-list {
  padding-left: var(--gk-space-5);
}

.feature-list li,
.howto-steps li,
.rank-list li,
.tip-list li {
  margin: var(--gk-space-2) 0;
}

.disclaimer {
  background: var(--gk-surface-2);
  border-left: 3px solid var(--gk-accent);
  padding: var(--gk-space-3) var(--gk-space-4);
  border-radius: var(--gk-radius-sm);
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

/* ----- FAQ ----- */

.faq-item {
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius);
  padding: var(--gk-space-3) var(--gk-space-4);
  margin: var(--gk-space-3) 0;
  background: var(--gk-surface);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-family: var(--gk-font-display);
}

.faq-answer {
  color: var(--gk-ink-soft);
  margin-top: var(--gk-space-2);
}

/* ----- comparison table ----- */

.compare-wrap {
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--gk-space-3) 0;
  min-width: 480px;
}

.compare-table th,
.compare-table td {
  border: 1px solid var(--gk-line);
  padding: var(--gk-space-3);
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  background: var(--gk-surface-2);
  font-family: var(--gk-font-display);
}

.compare-table th[scope="row"] {
  font-weight: 600;
}

/* ----- archive + library lists ----- */

.archive-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--gk-space-2);
}

.archive-list a {
  display: block;
  padding: var(--gk-space-3);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  text-decoration: none;
  text-align: center;
  color: var(--gk-ink);
}

.archive-list a:hover {
  border-color: var(--gk-accent);
  color: var(--gk-accent);
}

.lib-grid {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: var(--gk-space-2);
}

.lib-grid a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--gk-tap);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  text-decoration: none;
  color: var(--gk-ink);
  font-weight: 600;
}

.lib-grid a:hover {
  border-color: var(--gk-accent);
  color: var(--gk-accent);
}

.archive-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  margin-top: var(--gk-space-4);
  align-items: center;
}

/* ----- play sections ----- */

.play-section {
  padding: var(--gk-space-5) 0 var(--gk-space-6);
}

.play-head {
  text-align: center;
  max-width: 64ch;
  margin: 0 auto var(--gk-space-4);
}

.play-intro {
  color: var(--gk-ink-soft);
}

.play-switch {
  text-align: center;
  margin-top: var(--gk-space-4);
}

/* ----- board shell ----- */

.ribbit {
  max-width: 640px;
  margin: 0 auto;
  background: var(--gk-surface);
  border: 1px solid var(--gk-line);
  border-radius: var(--gk-radius-lg);
  box-shadow: var(--gk-shadow);
  padding: var(--gk-space-4);
}

.rb-toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--gk-space-3);
  margin-bottom: var(--gk-space-4);
}

.rb-stats {
  display: flex;
  gap: var(--gk-space-5);
}

.rb-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rb-stat-label {
  font-size: var(--gk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gk-ink-soft);
}

.rb-stat-val {
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-lg);
  font-variant-numeric: tabular-nums;
}

/* ----- the pond (SVG graph) ----- */

.rb-boardwrap {
  position: relative;
  background: var(--gk-surface-2);
  border-radius: var(--gk-radius);
  padding: var(--gk-space-3);
}

.rb-board {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  touch-action: none; /* pointer drag traces a path; never scroll the page */
  -webkit-user-select: none;
  user-select: none;
}

.rb-edge {
  stroke: var(--gk-line-strong);
  stroke-width: 1.1;
  stroke-linecap: round;
  transition: stroke var(--gk-transition-fast);
}

.rb-edge.active {
  stroke: var(--gk-accent);
  stroke-width: 1.8;
}

.rb-node {
  cursor: pointer;
}

.rb-pad {
  fill: var(--gk-surface);
  stroke: var(--gk-line-strong);
  stroke-width: 0.8;
  transition: fill var(--gk-transition-fast), stroke var(--gk-transition-fast);
}

/* Deterministic frog-tint per node color 0-3 (soft rims, letters stay legible). */
.rb-node[data-color="0"] .rb-pad { stroke: #4c9f70; }
.rb-node[data-color="1"] .rb-pad { stroke: #d79b3c; }
.rb-node[data-color="2"] .rb-pad { stroke: #3f8fb0; }
.rb-node[data-color="3"] .rb-pad { stroke: #b06a9c; }

.rb-letter {
  fill: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}

.rb-node:hover .rb-pad {
  stroke: var(--gk-accent);
}

.rb-node.in-path .rb-pad {
  fill: var(--gk-accent-soft);
  stroke: var(--gk-accent);
  stroke-width: 1.4;
}

.rb-node.hint .rb-pad {
  stroke: var(--gk-warn);
  stroke-width: 1.6;
  animation: rb-pulse 1s ease infinite;
}

.rb-node.cleared {
  cursor: default;
}

.rb-node.cleared .rb-pad {
  fill: var(--gk-surface-2);
  stroke: var(--gk-line);
  opacity: 0.35;
}

.rb-node.cleared .rb-letter {
  opacity: 0.25;
}

.rb-node.just-cleared .rb-pad {
  animation: rb-pop var(--gk-transition) ease;
}

/* current traced letters, floating at the base of the pond */
.rb-trace {
  position: absolute;
  left: 50%;
  bottom: var(--gk-space-3);
  transform: translateX(-50%);
  min-height: 1.6em;
  padding: 2px var(--gk-space-3);
  border-radius: var(--gk-radius-pill);
  background: var(--gk-accent);
  color: var(--gk-accent-contrast);
  font-family: var(--gk-font-display);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--gk-transition-fast);
}

.rb-trace.show {
  opacity: 1;
}

.rb-trace.bad {
  background: var(--gk-danger);
}

/* ----- word list ----- */

.rb-wordbar {
  margin-top: var(--gk-space-4);
}

.rb-words {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  justify-content: center;
}

.rb-word {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  padding: 4px var(--gk-space-2);
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  font-variant-numeric: tabular-nums;
}

.rb-word .rb-slot {
  display: inline-block;
  width: 0.62em;
  text-align: center;
  font-family: var(--gk-font-display);
  font-weight: 700;
  color: var(--gk-ink-soft);
  border-bottom: 2px solid var(--gk-line-strong);
  text-transform: uppercase;
}

.rb-word.found {
  border-color: var(--gk-ok);
  background: var(--gk-accent-soft);
}

.rb-word.found .rb-slot {
  color: var(--gk-ink);
  border-bottom-color: transparent;
}

.rb-word.star {
  border-color: var(--gk-warn);
}

.rb-word.star .rb-star {
  color: var(--gk-warn);
  margin-left: 3px;
  font-size: var(--gk-fs-sm);
}

.rb-word.just-found {
  animation: rb-pop var(--gk-transition) ease;
}

/* ----- actions + message ----- */

.rb-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  justify-content: center;
  margin-top: var(--gk-space-4);
}

.rb-message {
  text-align: center;
  min-height: 1.5em;
  margin: var(--gk-space-3) 0 0;
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

.rb-message.bad {
  color: var(--gk-danger);
}

.rb-message.good {
  color: var(--gk-ok);
}

.rb-noscript {
  color: var(--gk-ink-soft);
  text-align: center;
}

/* ----- win overlay ----- */

.rb-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gk-space-4);
  background: rgba(8, 20, 19, 0.55);
  z-index: 60;
}

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

.rb-overlay-card {
  background: var(--gk-surface);
  border-radius: var(--gk-radius-lg);
  box-shadow: var(--gk-shadow-lg);
  padding: var(--gk-space-6);
  max-width: 440px;
  width: 100%;
  text-align: center;
  max-height: calc(100dvh - 2 * var(--gk-space-4));
  overflow-y: auto;
}

.rb-cheer {
  font-size: var(--gk-fs-3xl);
  line-height: 1;
}

.rb-overlay-sub {
  color: var(--gk-ink-soft);
}

.rb-overlay-fact {
  font-style: italic;
  color: var(--gk-ink);
  background: var(--gk-surface-2);
  border-radius: var(--gk-radius-sm);
  padding: var(--gk-space-3);
}

.rb-overlay-stats {
  display: flex;
  justify-content: center;
  gap: var(--gk-space-5);
  margin: var(--gk-space-4) 0;
}

.rb-overlay-stats div {
  display: flex;
  flex-direction: column;
}

.rb-overlay-stats dt {
  font-size: var(--gk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gk-ink-soft);
}

.rb-overlay-stats dd {
  margin: 0;
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-lg);
  font-variant-numeric: tabular-nums;
}

.rb-overlay-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-space-2);
  justify-content: center;
  margin-top: var(--gk-space-4);
}

.rb-share-status {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
  min-height: 1.2em;
}

/* ----- leaderboard panel + page ----- */

.rb-lb-panel {
  margin-top: var(--gk-space-4);
  text-align: left;
}

.rb-lb-title {
  font-size: var(--gk-fs-lg);
  margin: 0 0 var(--gk-space-2);
}

.rb-lb-signin {
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

.lb-page {
  margin-top: var(--gk-space-4);
}

.lb-controls {
  margin-bottom: var(--gk-space-4);
}

.lb-date-label {
  display: inline-flex;
  flex-direction: column;
  gap: var(--gk-space-1);
  font-size: var(--gk-fs-sm);
  color: var(--gk-ink-soft);
}

.lb-date {
  min-height: var(--gk-tap);
  padding: 0 var(--gk-space-3);
  border: 1px solid var(--gk-line-strong);
  border-radius: var(--gk-radius-sm);
  background: var(--gk-surface);
  color: var(--gk-ink);
  font: inherit;
}

/* ----- footer ----- */

.site-footer {
  flex-shrink: 0;
  background: var(--gk-surface);
  border-top: 1px solid var(--gk-line);
  margin-top: var(--gk-space-7);
  padding: var(--gk-space-6) 0 calc(var(--gk-space-6) + env(safe-area-inset-bottom));
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gk-space-5);
}

.footer-col h2 {
  font-size: var(--gk-fs-md);
  margin: 0 0 var(--gk-space-2);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin: var(--gk-space-1) 0;
}

.footer-col a {
  color: var(--gk-ink-soft);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--gk-accent);
}

.footer-note {
  margin-top: var(--gk-space-5);
  color: var(--gk-ink-soft);
  font-size: var(--gk-fs-sm);
}

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

/* ----- animations ----- */

@keyframes rb-pop {
  0% { transform: scale(0.9); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes rb-pulse {
  0%, 100% { stroke-opacity: 1; }
  50% { stroke-opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ----- fullscreen board layout (ribbit-specific, media-independent) -----
 * The generic fullscreen shell lives in gamekit.css. .ribbit, .rb-wordbar, and
 * .rb-words carry data-gk-fs-fit. The SVG pond keeps its aspect ratio inside a
 * flexing .rb-boardwrap; the word bar scrolls when the list overflows. */
html.gk-fullscreen .ribbit { display: flex; flex-direction: column; flex: 1; min-height: 0; max-width: none; }
html.gk-fullscreen .rb-boardwrap {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
html.gk-fullscreen .rb-board {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: 1 / 1;
}
html.gk-fullscreen .rb-wordbar { flex: 0 1 auto; min-height: 0; max-height: 28%; overflow-y: auto; margin-top: var(--gk-space-2); }
html.gk-fullscreen .rb-words { overflow-y: auto; }
html.gk-fullscreen .play-section > *:not(.ribbit) { display: none; }
html.gk-fullscreen.gk-fs-tight .rb-toolbar { margin-bottom: var(--gk-space-2); }
html.gk-fullscreen.gk-fs-tight .rb-stat-val { font-size: var(--gk-fs-md); }
html.gk-fullscreen.gk-fs-tight .rb-boardwrap { padding: var(--gk-space-2); }
html.gk-fullscreen.gk-fs-tight .rb-wordbar { max-height: 24%; margin-top: var(--gk-space-1); }
html.gk-fullscreen.gk-fs-tight .rb-actions .btn { min-height: 34px; padding: 4px 14px; font-size: var(--gk-fs-sm); }
html.gk-fullscreen.gk-fs-tight .ribbit { padding: var(--gk-space-3); }
html.gk-fullscreen.gk-fs-tight .rb-word { padding: 2px var(--gk-space-2); font-size: var(--gk-fs-sm); }