:root {
  color-scheme: light;
  --bg: #f4f1ea;
  --panel: #fffdf8;
  --ink: #2f2a24;
  --accent: #2f7f6d;
  --danger: #d94d3f;
  --line: #d8d2c8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Gill Sans", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 10%, #fffdf7 0%, var(--bg) 55%, #e6dfd1 100%);
}

.splash-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.splash-card {
  width: min(560px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.splash-card h1 {
  margin: 0;
  font-size: 1.5rem;
}

.splash-card p {
  margin: 12px 0 0;
}

.splash-start-link {
  display: inline-block;
  margin-top: 18px;
  border: 1px solid #2f7f6d;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 8px 14px;
  font-weight: 600;
  text-decoration: none;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
  padding: 12px;
}

.game-column,
.maze-panel,
.sentence-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.game-column {
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.top-bar h1 {
  margin: 0;
  font-size: 1.1rem;
}

button {
  border: 1px solid #2f7f6d;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 600;
  cursor: pointer;
}

.btn-danger {
  border-color: var(--danger);
  background: var(--danger);
}

.falling-field {
  position: relative;
  overflow: hidden;
  min-height: 320px;
  background: linear-gradient(180deg, #fbf8f1 0%, #f2ebdc 100%);
}

.word-card {
  position: absolute;
  top: -40px;
  min-width: 88px;
  text-align: center;
  background: #fff;
  border: 1px solid #bcb3a6;
  border-radius: 10px;
  padding: 8px 10px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
  user-select: none;
}

.word-card[draggable="true"] {
  cursor: grab;
}

.word-card.flash-wrong {
  animation: wrongFlash 0.4s ease;
  border-color: var(--danger);
  background: #ffe8e5;
}

@keyframes wrongFlash {
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

.sentence-panel {
  border-radius: 0;
  border-left: 0;
  border-right: 0;
  border-bottom: 0;
  padding: 12px;
}

.sentence-panel h2 {
  margin: 0;
  font-size: 1rem;
}

.instruction,
.progress-text,
.maze-note {
  margin: 8px 0 0;
  font-size: 0.9rem;
}

.sentence-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.slot {
  border: 1px dashed #8c8377;
  min-width: 88px;
  padding: 8px;
  border-radius: 8px;
  text-align: left;
  background: #f6f3ea;
}

.slot-target {
  font-weight: 700;
  font-size: 0.98rem;
}

.slot-answer {
  margin-top: 4px;
  min-height: 1.1rem;
  font-size: 0.84rem;
  color: #6e6458;
}

.slot.ready {
  border-color: #467f6f;
  background: #e8f3ef;
}

.slot.complete {
  border-style: solid;
  border-color: #2f7f6d;
  background: #dff1ec;
}

.slot.complete .slot-answer {
  color: #1f6758;
  font-weight: 700;
}

.maze-column {
  display: flex;
}

.maze-panel {
  width: 100%;
  padding: 10px;
}

.maze-panel h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

#mazeCanvas {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
  }

  .maze-column {
    min-height: 240px;
  }
}

/* ── Reward / completion screen ─────────────────────────────────────────── */

.reward-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 24px;
}

.reward-title {
  margin: 0;
  font-size: 1.8rem;
  color: var(--ink);
  text-align: center;
}

.reward-maze-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 2px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  width: min(560px, 100%);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.10);
}

.reward-maze-grid canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
}

.reward-message {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.reward-message.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Navigation bar ───────────────────────────────────────────────────────── */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 6px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

/* ── Navigate select ──────────────────────────────────────────────────────── */
.nav-select {
  padding: 4px 8px;
  font-size: 0.85rem;
  font-family: inherit;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: none;
  color: var(--ink);
  cursor: pointer;
}

/* ── Standalone nav bar actions (Reset Game, Log Out) ─────────────────────── */
.nav-action-form {
  margin: 0;
}

.nav-action-btn {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 500;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: none;
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.nav-action-btn:hover {
  background: var(--bg);
}

.nav-action-danger {
  color: var(--danger);
  border-color: var(--danger);
}

.nav-action-danger:hover {
  background: #fff0ee;
}

/* ── Story page ───────────────────────────────────────────────────────────── */
.story-grid {
  display: grid;
  gap: 8px;
  margin: 16px 0;
}

.story-grid img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
}

.story-grid .story-grid-blank {
  background: var(--bg);
  border-radius: 6px;
}

.story-notes {
  margin-top: 12px;
}

.story-note {
  font-style: italic;
  color: var(--line);
  font-size: 0.85rem;
  margin: 4px 0;
}

.story-lang-hint {
  font-size: 0.8rem;
  color: var(--line);
  margin-top: 20px;
}

/* ── Lightbox ─────────────────────────────────────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 1000;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.lightbox.open { display: flex; }

.lb-img {
  max-width: 90vw;
  max-height: 75vh;
  border-radius: 8px;
  object-fit: contain;
}

.lb-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

.lb-nav { display: flex; gap: 16px; }

.lb-btn {
  padding: 8px 20px;
  border: 1px solid #fff;
  border-radius: 6px;
  background: none;
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
}

.lb-btn:hover { background: rgba(255, 255, 255, 0.15); }
.lb-btn:disabled { opacity: 0.3; cursor: default; }
.lb-btn:disabled:hover { background: none; }