/* ─── Reset & tokens ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg:       #0a1628;
  --surface:  #121e33;
  --surface2: #1a2a44;
  --cyan:     #00e5cc;
  --cyan-dim: rgba(0,229,204,0.15);
  --text:     #e8edf5;
  --muted:    rgba(232,237,245,0.5);
  --border:   rgba(232,237,245,0.08);
  --err:      #f87171;
  --ok:       #4ade80;

  /* 6×6 board sizing:
     6 cells + 5 gaps (each gap = --gap6)
     Available width ≈ 100vw − 32px padding
     Cell = min(52px, (available − 5×gap) / 6)          */
  --gap6:  12px;
  --cell6: min(52px, (100vw - 32px - 60px) / 6);
  --r6:    8px;
}

html, body {
  height: 100%;
  background: var(--bg);
  overscroll-behavior: none;
}

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100dvh;
  -webkit-user-select: none;
  user-select: none;
}

a { color: inherit; text-decoration: none; }

/* ─── Page layout ─────────────────────────────────────────── */
.page {
  width: 100%;
  max-width: 480px;
  padding: 16px 16px env(safe-area-inset-bottom, 16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  flex: 1;
}

/* ─── Top bar ─────────────────────────────────────────────── */
.top-bar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-btn {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 8px;
  transition: color 0.15s;
}
.back-btn:hover { color: var(--text); }

/* ─── Header ──────────────────────────────────────────────── */
.header { text-align: center; }

.title {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.title-badge {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(167,139,250,0.15);
  border: 1px solid rgba(167,139,250,0.4);
  color: #a78bfa;
  letter-spacing: 0.02em;
  vertical-align: middle;
}

.subtitle {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 2px;
}

/* ─── 6×6 Board (CSS Grid) ────────────────────────────────── *
 *
 * 11 columns and 11 rows:
 *   col pattern: cell gap cell gap cell gap cell gap cell gap cell
 *   The grid-template uses var(--cell6) for cells and var(--gap6) for gaps.
 * ──────────────────────────────────────────────────────────── */
.board6 {
  display: grid;
  grid-template-columns:
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6);
  grid-template-rows:
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6) var(--gap6)
    var(--cell6);
}

/* ─── Cells ────────────────────────────────────────────────── */
.cell6 {
  width:  var(--cell6);
  height: var(--cell6);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r6);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.15s, background 0.15s;
  touch-action: manipulation;
}
.cell6:hover  { border-color: rgba(232,237,245,0.18); }
.cell6:active { background: var(--surface2); }

.cell6.prefilled {
  background: var(--surface2);
  cursor: default;
  opacity: 0.85;
}

.cell6 svg {
  width:  58%;
  height: 58%;
  color: var(--text);
}
.cell6.prefilled svg { color: var(--muted); }

/* ─── Gaps (clue containers) ──────────────────────────────── */
.gap6 {
  display: grid;
  place-items: center;
}

.gap6-corner { /* empty intersection spacer */ }

/* ─── Bridge-capsule clue marks ───────────────────────────── */
.clue6 { border-radius: 999px; }

/* Horizontal capsule */
.clue6-h { width: 42%; height: 4px; }

/* Vertical capsule */
.clue6-v { width: 4px; height: 42%; }

/* same-shape = outline */
.clue6-outline {
  background: transparent;
  border: 1.5px solid var(--cyan);
}

/* same-fill = solid */
.clue6-solid {
  background: var(--cyan);
  border: none;
}

/* ─── Actions ─────────────────────────────────────────────── */
.actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.status6 {
  font-size: 0.88rem;
  font-weight: 700;
  min-height: 1.4em;
  text-align: center;
}

.btn-row {
  display: flex;
  gap: 10px;
}

.btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 999px;
  border: 1px solid var(--cyan);
  background: var(--cyan-dim);
  color: var(--cyan);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
}
.btn:hover    { background: rgba(0,229,204,0.25); }
.btn:active   { transform: scale(0.97); }
.btn:disabled { opacity: 0.35; cursor: default; pointer-events: none; }

.btn-muted {
  border-color: var(--border);
  background: transparent;
  color: var(--muted);
}
.btn-muted:hover { background: var(--surface2); }

/* ─── Footer ──────────────────────────────────────────────── */
.footer6 {
  margin-top: auto;
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
  padding-bottom: 8px;
}

/* ─── Modal overlay ───────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: 16px;
}
.modal-overlay[hidden] { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  max-width: 380px;
  width: 100%;
  max-height: 82vh;
  overflow-y: auto;
}

.modal h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.modal p {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 8px;
}

.modal strong { color: var(--text); }

/* ─── Help modal: symbol legend ──────────────────────────── */
.sym-legend6 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 10px 0;
}

.sym-legend6-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  color: var(--text);
}

.sym6 {
  width: 22px; height: 22px;
  color: var(--cyan);
  flex-shrink: 0;
}

/* ─── Help modal: clue legend ─────────────────────────────── */
.clue-legend6 {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 12px 0;
}

.clue-legend6-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text);
}

.clue-sample6 {
  width: 26px;
  height: 5px;
  border-radius: 999px;
  flex-shrink: 0;
}
.clue-sample6.clue6-outline { border: 1.5px solid var(--cyan); background: transparent; }
.clue-sample6.clue6-solid   { background: var(--cyan); }

/* ─── Result modal ────────────────────────────────────────── */
.result-modal-inner { text-align: center; }

.result-tier {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: #a78bfa;
  margin-bottom: 4px;
}

.result-date {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.result-pill {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(167,139,250,0.35);
  color: #a78bfa;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 22px;
}

.result-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.result-stat-value {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
}

.result-stat-label {
  font-size: 0.67rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.result-btn-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.result-footer {
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.8;
}

/* ─── Win animation ───────────────────────────────────────── */
@keyframes win6-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(167,139,250,0.45); }
  70%  { box-shadow: 0 0 0 8px rgba(167,139,250,0); }
  100% { box-shadow: 0 0 0 8px rgba(167,139,250,0); }
}

.cell6.win6 {
  border-color: #a78bfa;
  animation: win6-pulse 0.6s ease-out;
}