/* Theme colours are injected as CSS variables by src/ui.js from src/config.js.
   The values below are the Neon defaults so the first paint is already on-brand. */
:root {
  --bg1: #07081a;
  --bg2: #1b0838;
  --text: #eaeeff;
  --muted: #9aa1d4;
  --accent: #00f5d4;
  --accent2: #ff3df2;
  --danger: #ff4d6d;
  --panel: rgba(255, 255, 255, 0.07);
  --panel-border: rgba(255, 255, 255, 0.14);
  --glow: 1;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", sans-serif;
  --font-display: "Segoe UI Black", "Arial Black", system-ui, sans-serif;
  --radius: 16px;
  --gutter: max(16px, env(safe-area-inset-left));
  color-scheme: dark;
}

[data-theme="light"],
[data-theme="retro"] {
  color-scheme: light;
}

[data-theme="retro"] {
  --font: "Courier New", ui-monospace, monospace;
  --font-display: "Courier New", ui-monospace, monospace;
  --radius: 4px;
}

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

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg1);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ------------------------------------------------ animated background */
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(160deg, var(--bg1), var(--bg2));
}

.bg::before,
.bg::after {
  content: "";
  position: absolute;
  width: 70vmax;
  height: 70vmax;
  border-radius: 50%;
  filter: blur(80px);
  opacity: calc(0.28 * var(--glow));
  will-change: transform;
}

.bg::before {
  background: var(--accent);
  top: -25vmax;
  left: -20vmax;
  animation: drift-a 26s ease-in-out infinite alternate;
}

.bg::after {
  background: var(--accent2);
  bottom: -30vmax;
  right: -25vmax;
  animation: drift-b 32s ease-in-out infinite alternate;
}

@keyframes drift-a {
  to { transform: translate(28vmax, 22vmax) scale(1.15); }
}

@keyframes drift-b {
  to { transform: translate(-30vmax, -18vmax) scale(0.9); }
}

/* ----------------------------------------------------------- layout */
.app {
  height: 100vh;
  height: 100dvh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 10px;
  padding: max(12px, env(safe-area-inset-top)) var(--gutter) max(12px, env(safe-area-inset-bottom));
  max-width: 1100px;
  margin: 0 auto;
}

.stage {
  container-type: size;
  display: grid;
  place-items: center;
  min-height: 0;
  min-width: 0;
}

.board-wrap {
  width: min(100vw - 32px, 100vh - 190px);
  width: min(100cqw, 100cqh);
  aspect-ratio: 1;
  touch-action: none;
}

#board {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* ------------------------------------------------------------- HUD */
.hud {
  display: flex;
  align-items: stretch;
  gap: 10px;
  flex-wrap: wrap;
}

.cards {
  display: flex;
  gap: 8px;
  flex: 1 1 auto;
}

.card {
  flex: 1 1 0;
  min-width: 64px;
  display: flex;
  flex-direction: column;
  padding: 7px 12px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
}

.label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.value {
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}

.hud-actions {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.icon-btn {
  width: 46px;
  display: grid;
  place-items: center;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  cursor: pointer;
  transition: transform 0.12s, background 0.15s;
}

.icon-btn:hover {
  background: color-mix(in srgb, var(--accent) 20%, var(--panel));
}

.icon-btn:active {
  transform: scale(0.94);
}

#btn-mute .slash {
  display: none;
}

#btn-mute[aria-pressed="true"] .slash {
  display: block;
}

#btn-mute[aria-pressed="true"] .wave {
  display: none;
}

.effects {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1 1 100%;
  /* Always reserve the row so chips appearing never resize the board. */
  min-height: 34px;
  order: 3;
}

.chip {
  --c: var(--accent);
  --p: 100;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 5px;
  font-size: 0.82rem;
  font-weight: 700;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: chip-in 0.25s ease-out;
}

.chip .ring {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: conic-gradient(var(--c) calc(var(--p) * 1%), rgba(128, 128, 160, 0.3) 0);
  display: grid;
  place-items: center;
}

.chip .ring::after {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--bg1) 85%, #000);
}

.chip .time {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-weight: 600;
}

@keyframes chip-in {
  from { transform: scale(0.7); opacity: 0; }
}

/* ------------------------------------------------------------ D-pad */
.dpad {
  display: grid;
  grid-template-columns: repeat(3, 64px);
  grid-template-rows: repeat(3, 64px);
  gap: 6px;
  justify-content: center;
  padding-bottom: 4px;
  touch-action: none;
}

.dpad button {
  display: grid;
  place-items: center;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  touch-action: none;
  cursor: pointer;
}

.dpad button:active {
  background: color-mix(in srgb, var(--accent) 35%, var(--panel));
}

.d-up { grid-area: 1 / 2; }
.d-left { grid-area: 2 / 1; }
.d-right { grid-area: 2 / 3; }
.d-down { grid-area: 3 / 2; }

/* Landscape phones: HUD left, board centre, D-pad right. */
@media (orientation: landscape) and (max-height: 560px) {
  .app {
    grid-template-columns: minmax(130px, 20vw) minmax(0, 1fr) auto;
    grid-template-rows: minmax(0, 1fr);
    max-width: none;
    gap: 14px;
  }

  .hud {
    flex-direction: column;
    flex-wrap: nowrap;
    align-content: start;
    overflow: auto;
  }

  .cards {
    flex-direction: column;
    flex: 0 0 auto;
  }

  .hud-actions {
    order: 4;
  }

  .effects {
    flex: 0 0 auto;
    flex-direction: column;
    min-height: 0;
  }

  .board-wrap {
    width: min(100cqw, 100cqh);
  }

  .dpad {
    align-self: center;
    grid-template-columns: repeat(3, 54px);
    grid-template-rows: repeat(3, 54px);
  }
}

/* ---------------------------------------------------------- overlays */
.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 16px;
  background: color-mix(in srgb, var(--bg1) 55%, transparent);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  overflow: auto;
  animation: fade-in 0.2s ease-out;
}

.screen.over-board {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

@keyframes fade-in {
  from { opacity: 0; }
}

.panel {
  width: min(100%, 400px);
  max-height: calc(100dvh - 32px);
  overflow: auto;
  padding: 26px 24px;
  text-align: center;
  background: color-mix(in srgb, var(--bg1) 62%, var(--panel));
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--radius) + 6px);
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  animation: pop-in 0.28s cubic-bezier(0.2, 1.1, 0.3, 1);
}

.panel.wide {
  width: min(100%, 640px);
  text-align: left;
  /* Heading and action row stay put; the middle scrolls on short screens. */
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel.wide .scroll {
  min-height: 0;
  overflow: auto;
  padding: 2px 4px 2px 2px;
  margin: 0 -4px 0 -2px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}

.panel.wide .row {
  flex: none;
}

@keyframes pop-in {
  from { transform: translateY(14px) scale(0.96); opacity: 0; }
}

.panel h2 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: 0.02em;
}

.panel.wide h2 {
  margin-bottom: 16px;
}

.panel h3 {
  margin: 20px 0 8px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.logo {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 14vw, 4.6rem);
  line-height: 1;
  letter-spacing: 0.04em;
}

.logo span:first-child {
  color: var(--accent);
  text-shadow: 0 0 calc(24px * var(--glow)) var(--accent);
}

.logo span:last-child {
  color: var(--accent2);
  text-shadow: 0 0 calc(24px * var(--glow)) var(--accent2);
}

.tagline {
  margin: 6px 0 20px;
  color: var(--muted);
}

.hint {
  margin: 18px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

kbd {
  font: inherit;
  font-size: 0.85em;
  padding: 1px 6px;
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  background: var(--panel);
}

.menu {
  display: grid;
  gap: 10px;
}

.row {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.row.end {
  justify-content: flex-end;
}

.btn {
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  padding: 13px 18px;
  min-height: 48px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.12s, background 0.15s, box-shadow 0.2s;
}

.btn:hover {
  background: color-mix(in srgb, var(--accent) 18%, var(--panel));
}

.btn:active {
  transform: scale(0.97);
}

.btn small {
  margin-left: 8px;
  font-weight: 600;
  opacity: 0.7;
}

.btn.primary {
  color: var(--bg1);
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent2)));
  border-color: transparent;
  box-shadow: 0 0 calc(26px * var(--glow)) color-mix(in srgb, var(--accent) 45%, transparent);
}

[data-theme="retro"] .btn.primary,
[data-theme="contrast"] .btn.primary {
  background: var(--accent);
  color: var(--bg1);
}

[data-theme="retro"] .btn.primary {
  color: #9bbc0f;
}

/* -------------------------------------------------------- mode cards */
.mode-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.mode-card {
  font: inherit;
  text-align: left;
  color: var(--text);
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  cursor: pointer;
  display: grid;
  gap: 4px;
  transition: transform 0.12s, background 0.15s, border-color 0.15s;
}

.mode-card:hover {
  background: color-mix(in srgb, var(--accent) 16%, var(--panel));
  border-color: var(--accent);
}

.mode-card:active {
  transform: scale(0.98);
}

.mode-card b {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.mode-card span {
  color: var(--muted);
  font-size: 0.85rem;
}

.mode-card .best {
  margin-top: 4px;
  color: var(--accent);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------ settings */
.settings {
  display: grid;
  gap: 14px;
}

.field {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.field legend {
  padding: 0;
  margin-bottom: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.field legend small {
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.8;
}

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.seg label {
  flex: 1 1 auto;
  position: relative;
}

.seg input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
}

.seg span {
  display: block;
  text-align: center;
  padding: 9px 12px;
  min-height: 42px;
  font-weight: 600;
  font-size: 0.92rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--radius) - 4px);
  transition: background 0.15s, color 0.15s;
}

.seg input:checked + span {
  background: var(--accent);
  color: var(--bg1);
  border-color: transparent;
}

[data-theme="retro"] .seg input:checked + span {
  color: #9bbc0f;
}

.seg input:focus-visible + span {
  outline: 3px solid var(--accent2);
  outline-offset: 2px;
}

.toggles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 8px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  cursor: pointer;
  position: relative;
}

.toggle input {
  position: absolute;
  opacity: 0;
  width: 44px;
  height: 26px;
  margin: 0;
  cursor: pointer;
}

.toggle .sw {
  flex: none;
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  position: relative;
  transition: background 0.2s;
}

.toggle .sw::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text);
  transition: transform 0.2s;
}

.toggle input:checked + .sw {
  background: var(--accent);
}

.toggle input:checked + .sw::after {
  transform: translateX(18px);
  background: var(--bg1);
}

.toggle input:focus-visible + .sw {
  outline: 3px solid var(--accent2);
  outline-offset: 2px;
}

.sliders {
  display: grid;
  gap: 10px;
}

.slider {
  display: grid;
  grid-template-columns: 130px 1fr;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
}

.slider input {
  width: 100%;
  accent-color: var(--accent);
  min-height: 28px;
}

/* --------------------------------------------------------------- stats */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0;
}

.stat-tiles div {
  padding: 12px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}

.stat-tiles dt {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat-tiles dd {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-variant-numeric: tabular-nums;
}

.ach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.ach-list li {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--radius) - 4px);
  font-size: 0.9rem;
}

.ach-list li .tick {
  flex: none;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 2px solid var(--muted);
  font-size: 0.8rem;
  font-weight: 900;
}

.ach-list li.done .tick {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg1);
}

.ach-list li:not(.done) {
  opacity: 0.65;
}

.ach-list small {
  display: block;
  color: var(--muted);
}

/* ---------------------------------------------------------- game over */
.final {
  display: grid;
  justify-items: center;
  gap: 2px;
  margin-bottom: 14px;
}

.final-score {
  font-family: var(--font-display);
  font-size: 3.4rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  text-shadow: 0 0 calc(22px * var(--glow)) color-mix(in srgb, var(--accent) 60%, transparent);
}

.new-best {
  margin-top: 6px;
  padding: 3px 14px;
  font-weight: 900;
  letter-spacing: 0.14em;
  color: var(--bg1);
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 999px;
  animation: flourish 0.9s cubic-bezier(0.2, 1.4, 0.3, 1) both, shimmer 1.6s ease-in-out 0.9s infinite alternate;
}

[data-theme="retro"] .new-best {
  color: #9bbc0f;
  background: var(--accent);
}

@keyframes flourish {
  from { transform: scale(0.2) rotate(-12deg); opacity: 0; }
  60% { transform: scale(1.25) rotate(3deg); }
}

@keyframes shimmer {
  to { filter: brightness(1.25); transform: scale(1.04); }
}

.over-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 14px;
  margin: 0 0 18px;
  text-align: left;
  font-size: 0.9rem;
}

.over-details div {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 0;
  border-bottom: 1px solid var(--panel-border);
}

.over-details dt {
  color: var(--muted);
}

.over-details dd {
  margin: 0;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ----------------------------------------------- countdown and toasts */
.countdown {
  position: fixed;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  pointer-events: none;
  font-family: var(--font-display);
  font-size: clamp(5rem, 26vmin, 11rem);
  color: var(--text);
  text-shadow: 0 0 calc(40px * var(--glow)) var(--accent), 0 6px 30px rgba(0, 0, 0, 0.5);
  opacity: 0;
}

.countdown.tick {
  animation: count 0.8s ease-out both;
}

@keyframes count {
  0% { transform: scale(1.7); opacity: 0; }
  25% { transform: scale(1); opacity: 1; }
  80% { opacity: 1; }
  100% { transform: scale(0.85); opacity: 0; }
}

.toasts {
  position: fixed;
  z-index: 20;
  top: calc(max(12px, env(safe-area-inset-top)) + 70px); /* below the HUD cards */
  left: 50%;
  transform: translateX(-50%);
  display: grid;
  gap: 8px;
  justify-items: center;
  pointer-events: none;
}

.toast {
  padding: 9px 18px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text);
  background: color-mix(in srgb, var(--bg1) 70%, var(--panel));
  border: 1px solid var(--accent);
  border-radius: 999px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  animation: toast 3.2s ease both;
}

@keyframes toast {
  0% { transform: translateY(-18px); opacity: 0; }
  8%, 85% { transform: none; opacity: 1; }
  100% { transform: translateY(-10px); opacity: 0; }
}

/* ------------------------------------------------------ reduced motion */
html.reduce-motion *,
html.reduce-motion *::before,
html.reduce-motion *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}

html.reduce-motion .countdown.tick {
  animation: none;
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .bg::before,
  .bg::after {
    animation: none;
  }
}

@media (max-width: 420px) {
  .value {
    font-size: 1.25rem;
  }

  .slider {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .panel {
    padding: 20px 16px;
  }

  .over-details {
    grid-template-columns: 1fr;
  }
}