/* ── Landing screen, menu, buttons, expand-rows ────────────────── */
   LANDING SCREEN — editorial dark
   Hierarchy: wordmark → tagline → actions.
   No sparkles, no pixel art, no gradients.
═══════════════════════════════════════════ */
#landing {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 100;
  background: #09090e; /* solid fallback if CSS vars not loaded */
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(74,127,165,0.10) 0%, transparent 70%),
    var(--bg, #09090e);
  padding: var(--sp-4, 1.5rem);
  gap: var(--sp-6, 3rem);
}

/* ── Wordmark block ── */
.brand {
  text-align: center;
  animation: fadeUp 220ms ease both;
}

/* "CHESS" — massive Syne display type. No pixel art. */
.brand-title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 14vw, 9rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--text);
  /* Thin horizontal rule above — gives editorial weight */
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border-active);
}

/* "ARCADE" — small mono subtitle. Contrasts display above. */
.brand-sub {
  font-family: var(--font-mono);
  font-size: clamp(.55rem, 1.4vw, .7rem);
  font-weight: 400;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--warm);
  margin-top: var(--sp-2);
  /* Thin rule below — bookends the wordmark block */
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border);
}

/* ── Menu container ── */
.menu {
  display: flex; flex-direction: column;
  gap: var(--sp-2); align-items: stretch;
  width: min(280px, 86vw);
  animation: fadeUp 220ms 80ms ease both;
}

/* ── PRIMARY BUTTON — filled, single dominant action ──
   Only .btn-primary gets filled. Everything else is ghost.
   This is the hierarchy: one thing stands out, rest recede.
──────────────────────────────────────────────────────── */
.btn {
  font-family: var(--font-mono);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  width: 100%;
  padding: 13px var(--sp-4);
  cursor: pointer;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-active);
  background: transparent;
  color: var(--text);
  transition:
    background var(--ease),
    border-color var(--ease),
    color var(--ease),
    transform var(--ease);
  touch-action: manipulation;
  user-select: none;
  line-height: 1.5;
  text-align: center;
}
.btn:hover {
  background: rgba(232,228,220,0.06);
  border-color: rgba(232,228,220,.45);
}
.btn:active { transform: translateY(1px); }

/* Primary: VS AI — filled with accent */
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  letter-spacing: .1em;
}
.btn-primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
}

/* Online: ghost with accent tint */
.btn-online-ghost {
  border-color: rgba(74,127,165,.45);
  color: var(--accent-bright);
}
.btn-online-ghost:hover {
  background: rgba(74,127,165,.08);
  border-color: var(--accent);
}

/* Keep .btn-o and .btn-g aliases pointing to new intent */
.btn-o { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-o:hover { background: var(--accent-bright); border-color: var(--accent-bright); }
.btn-g { border-color: rgba(74,127,165,.45); color: var(--accent-bright); }
.btn-g:hover { background: rgba(74,127,165,.08); border-color: var(--accent); }

/* ── Expand panel ── */
.expand-row {
  display: none; flex-direction: column;
  align-items: stretch; gap: var(--sp-2);
  padding: var(--sp-3);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--r-md) var(--r-md);
  background: var(--surface);
  width: 100%;
}
.expand-row.open { display: flex; }

.row-label {
  font-family: var(--font-mono);
  font-size: .5rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: var(--sp-1);
}

.opt-row { display: flex; gap: var(--sp-1); width: 100%; }

/* Option toggle chips */
.obtn {
  font-family: var(--font-mono);
  font-size: .54rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-1);
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  flex: 1; text-align: center; cursor: pointer;
  transition: background var(--ease), border-color var(--ease), color var(--ease);
  touch-action: manipulation;
}
.obtn:hover  { background: rgba(232,228,220,.04); color: var(--text); }
/* All active states use accent — consistent, not rainbow */
.obtn.active    { border-color: var(--accent-bright); color: var(--accent-bright); background: rgba(74,127,165,.10); }
.obtn.de.active { border-color: var(--ok);            color: var(--ok);            background: rgba(74,154,122,.08); }
.obtn.dm.active { border-color: var(--warm);          color: var(--warm);          background: rgba(200,184,162,.08); }
.obtn.dh.active { border-color: var(--danger);        color: var(--danger);        background: rgba(192,68,76,.08); }

/* Custom time input */
#custom-time-row { display: none; align-items: center; gap: var(--sp-2); margin-top: var(--sp-1); }
#custom-time-row.visible { display: flex; }

.time-input {
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  width: 64px; padding: var(--sp-1) var(--sp-2);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  text-align: center; outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.time-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74,127,165,.15);
}


/* ═══════════════════════════════════════════

/* Theme chips — coloured dot accent */
.theme-chip[data-theme="classic"].active { color:#ddd090; border-color:#ddd090; background:rgba(221,208,144,.12); }
.theme-chip[data-theme="marble"].active  { color:#e8e0d4; border-color:#e8e0d4; background:rgba(232,224,212,.12); }
.theme-chip[data-theme="neon"].active    { color:#00ffcc; border-color:#00ffcc; background:rgba(0,255,204,.10); }