*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0d0d1a;
  --surface: #13132a;
  --panel:   #1a1a35;
  --border:  #2a2a55;
  --accent:  #5c6bc0;
  --accent2: #7986cb;
  --text:    #e8e8f4;
  --muted:   #6868a0;
  --red:     #e63946;
  --blue:    #4895ef;
  --green:   #2ec4b6;
  --yellow:  #ffd166;
  /* current palette colors — updated by JS when color scheme changes */
  --pal-1:   #e63946;
  --pal-2:   #4895ef;
  --pal-3:   #2ec4b6;
  --pal-4:   #ffd166;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ── Header ── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

h1 {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--pal-1), var(--pal-2), var(--pal-3), var(--pal-4), var(--pal-1));
  background-size: 400px 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: logo-scroll 2s linear infinite;
  flex-shrink: 0;
  user-select: none;
}

nav {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  overflow: visible;
  padding-bottom: 2px;
}

#play-menu {
  position: relative;
}

#play-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 500;
  min-width: 140px;
  overflow: hidden;
}
#play-dropdown.open { display: block; }

.play-item {
  display: block;
  width: 100%;
  background: transparent;
  color: var(--text);
  border: none;
  padding: 9px 14px;
  text-align: left;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  transition: background 0.1s;
}
.play-item:hover { background: var(--panel); }

.mode-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
}
.mode-btn:hover { color: var(--text); border-color: var(--accent2); }
.mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

#player-info {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
  flex-shrink: 0;
  margin-left: auto;
}

#header-username {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

#player-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

#btn-settings {
  background: rgba(92,107,192,0.15);
  border: 1px solid var(--accent);
  color: var(--accent2);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}
#btn-settings:hover { background: var(--accent); color: #fff; }

/* ── Main layout ── */
main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 16px;
  gap: 24px;
  min-height: 0;
  overflow-y: auto;
}

/* ── Game area ── */
#game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  position: relative;
  flex-shrink: 0;
}

/* ── Board ── */
#board-wrap {
  /* fill viewport: limited by width, by remaining height after chrome, capped at 900px */
  width: min(calc(100vw - 32px), calc(100dvh - 250px), 900px);
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 0 2px var(--border), 0 12px 40px rgba(0,0,0,0.6);
  flex-shrink: 0;
}

canvas#board {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
}

/* ── Stats ── */
#stats {
  display: flex;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--muted);
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
#stats strong { color: var(--yellow); font-size: 0.95rem; }
#seed-display { font-size: 0.78rem; color: var(--muted); }

/* ── Controls ── */
#controls {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  width: 520px;
  max-width: 100%;
}

#dpad {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  order: 1;
}
#controls.swapped #dpad { order: 2; }

.dpad-row { display: flex; gap: 4px; align-items: center; }
.dpad-gap { width: 62px; height: 62px; }

#rotate-btns {
  display: flex;
  flex-direction: row;
  gap: 8px;
  align-items: center;
  order: 2;
}
#controls.swapped #rotate-btns { order: 1; }

#controls button {
  width: 62px;
  height: 62px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.2rem;
  border-radius: 10px;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.12s, transform 0.08s;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
}
#controls button:hover  { background: var(--accent); border-color: var(--accent); }
#controls button:active { transform: scale(0.88); }

#btn-cw, #btn-ccw {
  font-size: 1.8rem;
  color: var(--yellow);
  width: 70px;
  height: 70px;
  background: rgba(255,209,102,0.08);
  border-color: rgba(255,209,102,0.5);
}
#btn-cw:hover, #btn-ccw:hover {
  background: var(--yellow);
  color: var(--bg);
  border-color: var(--yellow);
}

/* ── Mode controls ── */
#mode-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

#btn-new-game {
  padding: 7px 18px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.15s;
}
#btn-new-game:hover { background: var(--accent2); }

#seed-input {
  padding: 6px 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  width: 140px;
  font-size: 0.85rem;
}
#seed-input:focus { outline: none; border-color: var(--accent2); }

/* ── Replay controls ── */
#replay-controls {
  display: none;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

#btn-stop-replay {
  padding: 5px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}
#btn-stop-replay:hover { background: var(--accent); border-color: var(--accent); }

/* ── Multiplayer overlay ── */
#mp-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 20, 0.9);
  backdrop-filter: blur(6px);
  z-index: 10;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: 10px;
}

#mp-status {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  padding: 0 16px;
}

#mp-players {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 0.88rem;
  padding: 0 16px;
}

#btn-mp-ready {
  display: none;
  font-size: 1rem;
  padding: 10px 36px;
  background: var(--green);
  border: none;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: filter 0.15s;
}
#btn-mp-ready:hover { filter: brightness(1.12); }
#btn-mp-ready:disabled { opacity: 0.6; cursor: default; filter: none; }

#btn-mp-leave {
  font-size: 0.82rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s;
}
#btn-mp-leave:hover { color: var(--text); }

/* ── Lobby actions ── */
#mp-lobby-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

#btn-mp-create {
  font-size: 1rem;
  padding: 10px 32px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: background 0.15s;
}
#btn-mp-create:hover { background: var(--accent2); }

#mp-join-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

#mp-code-input {
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-family: monospace;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  width: 120px;
}
#mp-code-input:focus { outline: none; border-color: var(--accent2); }
#mp-code-input::placeholder { color: var(--muted); letter-spacing: 1px; font-weight: 400; }

#btn-mp-join {
  padding: 8px 18px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  transition: background 0.15s;
}
#btn-mp-join:hover { background: var(--accent2); }

#mp-lobby-error {
  font-size: 0.8rem;
  color: var(--red);
  min-height: 1em;
  text-align: center;
}

#mp-lobby-code {
  font-size: 0.88rem;
  color: var(--muted);
  text-align: center;
}

#mp-code-display {
  font-family: monospace;
  font-size: 2rem;
  color: var(--yellow);
  letter-spacing: 6px;
  font-weight: 900;
  display: inline-block;
  margin-top: 4px;
}

#btn-mp-copy {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 2px 7px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  margin-left: 10px;
  vertical-align: middle;
  transition: color 0.15s, border-color 0.15s;
}
#btn-mp-copy:hover { color: var(--yellow); border-color: var(--yellow); }

/* ── Leaderboard ── */
#leaderboard-area {
  display: none;
  min-width: 280px;
  max-width: 480px;
  width: 100%;
}

#lb-kind-tabs { display: flex; gap: 6px; margin-bottom: 10px; }
#lb-tabs { display: flex; gap: 6px; margin-bottom: 12px; }

.lb-kind-tab, .lb-tab {
  padding: 5px 14px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.15s;
}
.lb-kind-tab.active, .lb-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

#lb-table { width: 100%; border-collapse: collapse; font-size: 0.83rem; }
#lb-table th, #lb-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
#lb-table th { color: var(--yellow); font-weight: 600; }
#lb-table tr:hover td { background: var(--panel); }

.replay-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent2);
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: background 0.15s;
}
.replay-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── FAQ ── */
#faq-area {
  display: none;
  min-width: 280px;
  max-width: 560px;
  width: 100%;
}

.faq-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 14px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.faq-item:last-child { border-bottom: none; }

.faq-q {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.faq-a {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}

.faq-a code {
  font-family: monospace;
  font-size: 0.8rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--yellow);
}

/* ── Mode picker ── */
#mode-picker {
  display: none;
  width: 100%;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px;
  overflow-y: auto;
}
#mode-picker.visible { display: flex; }

#mode-picker-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  max-width: 440px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.mode-picker-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--yellow);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.mode-picker-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mode-pick-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}
.mode-pick-btn:hover { border-color: var(--accent); background: rgba(92,107,192,0.1); }

.mode-pick-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}
.mode-pick-desc {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.4;
}

#mode-picker-feedback {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: color 0.15s, border-color 0.15s;
  align-self: flex-start;
}
#mode-picker-feedback:hover { color: var(--text); border-color: var(--accent2); }

/* ── Splash IP note ── */
.splash-ip-note {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.4;
  opacity: 0.7;
}

/* ── Hour sub-tabs ── */
#lb-hour-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.lb-hour-tab {
  padding: 4px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 600;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.3;
}
.lb-hour-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.lb-hour-tab .lb-hour-seed {
  font-size: 0.62rem;
  opacity: 0.7;
  font-weight: 400;
  font-family: monospace;
}

/* ── Feedback panel ── */
#feedback-panel {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.78);
  align-items: center;
  justify-content: center;
  z-index: 200;
}

#feedback-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  max-width: 400px;
  width: calc(100% - 32px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100dvh - 48px);
  overflow-y: auto;
}

.feedback-ip-note {
  font-size: 0.72rem;
  color: var(--yellow);
  opacity: 0.8;
  line-height: 1.4;
  padding: 6px 10px;
  background: rgba(255, 209, 102, 0.06);
  border-radius: 6px;
  border: 1px solid rgba(255, 209, 102, 0.2);
}

#feedback-msg {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.88rem;
  font-family: inherit;
  resize: vertical;
  min-height: 100px;
}
#feedback-msg:focus { outline: none; border-color: var(--accent2); }
#feedback-msg::placeholder { color: var(--muted); }

#feedback-email {
  width: 100%;
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.88rem;
}
#feedback-email:focus { outline: none; border-color: var(--accent2); }
#feedback-email::placeholder { color: var(--muted); }

#feedback-send {
  padding: 9px 24px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s;
  align-self: flex-start;
}
#feedback-send:hover { background: var(--accent2); }

#feedback-status {
  font-size: 0.82rem;
  color: var(--green);
  min-height: 1em;
}

#feedback-close {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  line-height: 1;
  border-radius: 4px;
}
#feedback-close:hover { color: var(--text); }

#btn-feedback {
  background: rgba(92,107,192,0.15);
  border: 1px solid var(--accent);
  color: var(--accent2);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}
#btn-feedback:hover { background: var(--accent); color: #fff; }

/* ── Settings panel ── */
#settings-panel {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.78);
  align-items: center;
  justify-content: center;
  z-index: 200;
}

#settings-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  max-width: 400px;
  width: calc(100% - 32px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100dvh - 48px);
  overflow-y: auto;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.settings-header h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--yellow);
  text-transform: uppercase;
  letter-spacing: 2px;
}

#settings-close {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  line-height: 1;
  border-radius: 4px;
}
#settings-close:hover { color: var(--text); }

.settings-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.settings-section:last-child { border-bottom: none; padding-bottom: 0; }

.settings-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.settings-row {
  display: flex;
  gap: 8px;
}
.settings-row input {
  flex: 1;
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.88rem;
  min-width: 0;
}
.settings-row input:focus { outline: none; border-color: var(--accent2); }
.settings-row input::placeholder { color: var(--muted); }
.settings-row button {
  padding: 8px 14px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s;
}
.settings-row button:hover { background: var(--accent2); }

#settings-colorscheme {
  padding: 8px 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.88rem;
  cursor: pointer;
}
#settings-colorscheme:focus { outline: none; border-color: var(--accent2); }

#settings-account-id {
  font-family: monospace;
  font-size: 0.78rem;
  color: var(--muted);
}

#settings-account-status {
  font-size: 0.8rem;
  min-height: 1em;
  color: var(--green);
}
#settings-account-status.error { color: var(--red); }

#color-swatches {
  display: flex;
  gap: 18px;
}
.swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.swatch-dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.12);
  transition: background 0.2s;
}
.swatch span {
  font-size: 0.68rem;
  color: var(--muted);
}

.toggle-group {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  width: fit-content;
}
.toggle-btn {
  padding: 8px 22px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.15s;
}
.toggle-btn + .toggle-btn { border-left: 1px solid var(--border); }
.toggle-btn.active { background: var(--accent); color: #fff; }
.toggle-btn:hover:not(.active) { color: var(--text); background: var(--panel); }

.settings-hint {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
  min-height: 1.2em;
}

/* ── Modal ── */
#modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.78);
  align-items: center;
  justify-content: center;
  z-index: 200;
}

#modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  max-width: 360px;
  width: calc(100% - 32px);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

#modal-title { font-size: 1.4rem; margin-bottom: 10px; color: var(--yellow); }
#modal-body  { margin-bottom: 22px; line-height: 1.6; color: var(--muted); }

#modal-close {
  padding: 9px 30px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.15s;
}
#modal-close:hover { background: var(--accent2); }

/* ── Splash / onboarding ── */
#splash {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg);
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 16px;
}

#splash-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

#splash-box h1 {
  font-size: 2rem;
  letter-spacing: 4px;
  display: block;
}

.splash-sub {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: -10px;
}

.splash-rules {
  display: flex;
  flex-direction: column;
  gap: 9px;
  text-align: left;
  background: var(--panel);
  border-radius: 8px;
  padding: 14px 16px;
}

.rule { font-size: 0.88rem; line-height: 1.5; }

.splash-name {
  display: flex;
  gap: 8px;
}

.splash-name input {
  flex: 1;
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.9rem;
  min-width: 0;
}
.splash-name input:focus { outline: none; border-color: var(--accent2); }
.splash-name input::placeholder { color: var(--muted); }

.splash-name button {
  padding: 9px 16px;
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: background 0.15s;
}
.splash-name button:hover { background: var(--accent2); }

#splash-play {
  padding: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 1px;
  transition: filter 0.15s;
}
#splash-play:hover { filter: brightness(1.1); }

/* ── BMC links ── */
#bmc-header {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  padding: 6px 14px;
  transition: color 0.15s;
}
#bmc-header:hover { color: var(--yellow); }

.bmc-btn-splash {
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s;
}
.bmc-btn-splash:hover { color: var(--yellow); }

/* ── Beta badge ── */
.beta-badge {
  font-size: 0.62rem;
  background: var(--accent);
  color: #fff;
  border-radius: 3px;
  padding: 0 4px;
  vertical-align: middle;
  margin-left: 3px;
}

/* ── Splash options (color mode + controls) ── */
.splash-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  background: var(--panel);
  border-radius: 8px;
  padding: 14px 16px;
}
.splash-option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.splash-option-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}
.splash-options select {
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
}
#splash-color-swatches {
  display: flex;
  justify-content: space-around;
}

/* ── Drag demo animation ── */
.drag-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px;
  background: var(--surface);
  border-radius: 8px;
  position: relative;
}
.drag-demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  width: 60px;
  height: 60px;
  animation: demo-spin 2.6s ease-in-out infinite;
  transform-origin: center;
}
.drag-demo-cell {
  background: var(--c);
  border-radius: 4px;
}
.drag-demo-cursor {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255,255,255,0.9);
  border-radius: 50%;
  top: 28px;
  left: calc(50% - 6px);
  animation: demo-cursor 2.6s ease-in-out infinite;
}
.drag-demo-label {
  font-size: 0.7rem;
  color: var(--muted);
}
@keyframes logo-scroll {
  from { background-position-x: 0px; }
  to   { background-position-x: -400px; }
}

@keyframes demo-spin {
  0%, 25%  { transform: rotate(0deg); }
  65%, 100% { transform: rotate(90deg); }
}
@keyframes demo-cursor {
  0%   { opacity: 0; transform: translateX(-18px); }
  15%  { opacity: 1; transform: translateX(-18px); }
  55%  { opacity: 1; transform: translateX(18px); }
  70%  { opacity: 0; transform: translateX(18px); }
  100% { opacity: 0; transform: translateX(-18px); }
}

/* ── Responsive ── */

/* Small phones: tighten padding and controls */
@media (max-width: 480px) {
  header { padding: 8px 12px; }
  h1 { font-size: 1.05rem; letter-spacing: 2px; }
  .mode-btn { padding: 5px 10px; font-size: 0.9rem; }
  main { padding: 8px; }
  #controls { width: 100%; }
  #controls button { width: 52px; height: 52px; }
  #btn-cw, #btn-ccw { width: 58px; height: 58px; font-size: 1.5rem; }
  .dpad-gap { width: 52px; height: 52px; }
  #seed-input { display: none; } /* seed entry not practical on small screens */
}

/* Landscape mobile: shrink board so controls fit in viewport height */
@media (orientation: landscape) and (max-height: 520px) {
  header { padding: 6px 14px; }
  main { padding: 6px 10px; }
  #game-area { gap: 6px; }
  #board-wrap {
    width: min(calc(100dvh - 120px), calc(100vw - 32px), 900px);
  }
  #mode-controls { display: none; }
}

/* Large screens: allow board to breathe more */
@media (min-width: 1200px) {
  main { padding: 24px; }
  #game-area { gap: 14px; }
}