/* ── Reset & base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0d1117;
  --surface:    #161b22;
  --border:     #30363d;
  --border-lit: #21262d;
  --text:       #cdd9e5;
  --muted:      #8b949e;
  --anchor:     #f0883e;
  --token:      #1f6feb;
  --clue-order: #58a6ff;
  --clue-dep:   #a371f7;
  --success:    #238636;
  --danger:     #da3633;
  --satisfied:  #3fb950;
  --font-mono:  'Courier New', Courier, monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ── Screens ──────────────────────────────────────────────────────── */
.screen { padding: 24px; max-width: 960px; margin: 0 auto; }

/* ── App header (select screen) ──────────────────────────────────── */
.app-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.app-title  { font-size: 22px; font-weight: bold; color: #58a6ff; letter-spacing: 2px; }
.app-subtitle { font-size: 12px; color: var(--muted); letter-spacing: 1px; }

/* ── Puzzle list ──────────────────────────────────────────────────── */
.puzzle-list { display: flex; flex-direction: column; gap: 8px; }

.puzzle-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.15s;
}
.puzzle-card:hover { border-color: var(--clue-order); }

.puzzle-card-title { flex: 1; font-size: 14px; }
.puzzle-card-story { color: var(--muted); font-size: 11px; margin-top: 3px; }

.difficulty-badge {
  font-size: 10px;
  letter-spacing: 1px;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
}
.difficulty-badge.easy   { color: var(--satisfied); border: 1px solid var(--satisfied); }
.difficulty-badge.medium { color: var(--anchor);    border: 1px solid var(--anchor); }
.difficulty-badge.hard   { color: var(--danger);    border: 1px solid var(--danger); }

/* ── Game header ──────────────────────────────────────────────────── */
.game-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.btn-back {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
}
.btn-back:hover { border-color: var(--text); color: var(--text); }

.game-title-group { display: flex; align-items: baseline; gap: 10px; }
.game-title       { font-size: 16px; font-weight: bold; color: #58a6ff; }
.game-difficulty  { font-size: 11px; color: var(--muted); }

/* ── Story ────────────────────────────────────────────────────────── */
.game-story {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 20px;
  font-style: italic;
}

/* ── Game body layout ─────────────────────────────────────────────── */
.game-body {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.game-left  { flex: 1.3; display: flex; flex-direction: column; gap: 12px; }
.game-right { flex: 1;   display: flex; flex-direction: column; gap: 8px; }

.section-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--muted);
  margin-bottom: 6px;
}

/* ── Sequence slots ───────────────────────────────────────────────── */
.sequence { display: flex; flex-direction: column; gap: 5px; }

.slot-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.slot-number { color: var(--muted); font-size: 11px; width: 16px; text-align: right; }

.slot {
  flex: 1;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 7px 12px;
  font-size: 12px;
  color: var(--border);
  min-height: 34px;
  display: flex;
  align-items: center;
  transition: border-color 0.1s, background 0.1s;
}
.slot.filled        { border-style: solid; border-color: var(--border-lit); color: var(--text); }
.slot.anchor        { border-color: var(--anchor); color: var(--anchor); border-style: solid; }
.slot.drag-over     { border-color: var(--clue-order); background: #1f6feb11; }
.slot.selected-target { border-color: var(--clue-order); }

/* ── Token tray ───────────────────────────────────────────────────── */
.tray {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 40px;
}

.token {
  background: #1f6feb15;
  border: 1px solid var(--token);
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text);
  cursor: grab;
  transition: background 0.1s, border-color 0.1s;
  user-select: none;
}
.token:hover     { background: #1f6feb25; }
.token.selected  { background: #1f6feb35; border-color: #79c0ff; outline: 2px solid #1f6feb; }
.token.dragging  { opacity: 0.4; }

/* ── Game footer ──────────────────────────────────────────────────── */
.game-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}
.progress-text { font-size: 11px; color: var(--muted); }

.btn-submit {
  background: var(--success);
  border: none;
  color: white;
  padding: 6px 18px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  transition: opacity 0.15s;
}
.btn-submit:disabled { opacity: 0.3; cursor: default; }
.btn-submit:not(:disabled):hover { opacity: 0.85; }

/* ── Clues ────────────────────────────────────────────────────────── */
.clues { display: flex; flex-direction: column; gap: 5px; }

.clue {
  background: var(--surface);
  border-left: 3px solid var(--clue-order);
  border-radius: 0 4px 4px 0;
  padding: 6px 10px;
  font-size: 11px;
  color: var(--text);
  transition: opacity 0.2s, border-color 0.2s;
}
.clue.dep        { border-left-color: var(--clue-dep); }
.clue.satisfied  { opacity: 0.45; border-left-color: var(--satisfied); }
.clue.violated   { border-left-color: var(--danger); color: #ff7b72; }

/* ── Win screen ───────────────────────────────────────────────────── */
#screen-win {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
}
.win-box {
  background: var(--surface);
  border: 1px solid var(--success);
  border-radius: 8px;
  padding: 40px;
  max-width: 480px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.win-label      { font-size: 10px; letter-spacing: 3px; color: var(--satisfied); }
.win-title      { font-size: 20px; font-weight: bold; color: #58a6ff; }
.win-resolution { font-size: 13px; color: var(--muted); line-height: 1.6; font-style: italic; }

.message-banner {
  background: #5a2020;
  border: 1px solid #c0392b;
  color: #ff6b6b;
  border-radius: 6px;
  padding: 10px 16px;
  font-size: 13px;
  text-align: center;
  margin-bottom: 8px;
}

/* ── AI Refresh panel ─────────────────────────────────────────────── */
.refresh-panel {
  margin-top: 12px;
  padding: 18px 20px;
  border: 1px solid var(--satisfied);
  border-radius: 6px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.refresh-panel-label {
  font-size: 11px;
  color: var(--satisfied);
  letter-spacing: 1px;
}
.refresh-controls {
  display: flex;
  gap: 10px;
  align-items: center;
}
.refresh-topic-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 10px;
}
.refresh-topic-input:focus {
  outline: none;
  border-color: var(--clue-order);
}
.btn-ai-refresh {
  background: var(--token);
  border: none;
  color: white;
  padding: 6px 18px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  white-space: nowrap;
}
.btn-ai-refresh:disabled { opacity: 0.4; cursor: default; }
.btn-ai-refresh:not(:disabled):hover { opacity: 0.85; }
.refresh-status {
  font-size: 11px;
  color: var(--muted);
  font-style: italic;
}