static/styles.css

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Space+Mono:wght@400;700&display=swap');

:root {
  --bg-night: #090511;
  --bg-deep: #150b2e;
  --panel: rgba(18, 10, 38, 0.75);
  --panel-border: rgba(255, 67, 176, 0.4);
  --panel-glow: 0 0 42px rgba(255, 67, 176, 0.24);
  --text-main: #f4deff;
  --text-soft: #c89cff;
  --neon-pink: #ff3fb0;
  --neon-cyan: #3ef4ff;
  --neon-blue: #55a4ff;
  --neon-violet: #8b40ff;
  --neon-green: #8affc7;
  --danger: #ff5f7a;
  --keyboard-white-top: #fef0ff;
  --keyboard-white-bottom: #f1d6ff;
  --keyboard-black-top: #321355;
  --keyboard-black-bottom: #120727;
  --radius-l: 20px;
  --radius-m: 14px;
  --radius-s: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  max-width: 100%;
  overflow-x: clip;
  background-color: var(--bg-night);
}

gradio-app,
.gradio-container,
.gradio-container .main,
.gradio-container .contain,
.gradio-container .wrap {
  background: transparent !important;
}

.gradio-container {
  max-width: 100% !important;
}

body {
  margin: 0;
  min-height: 100vh;
  position: relative;
  overflow-x: clip;
  color: var(--text-main);
  font-family: 'Space Mono', monospace;
  background:
    radial-gradient(1000px 500px at 10% -5%, rgba(139, 64, 255, 0.35), transparent 60%),
    radial-gradient(800px 480px at 100% 0%, rgba(62, 244, 255, 0.2), transparent 60%),
    linear-gradient(175deg, var(--bg-night), var(--bg-deep));
}

body::before,
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

body::before {
  background:
    radial-gradient(circle at 50% 12%, rgba(255, 112, 190, 0.22) 0 18%, transparent 42%),
    repeating-linear-gradient(
      90deg,
      rgba(62, 244, 255, 0.06) 0 2px,
      transparent 2px 90px
    );
  opacity: 0.9;
  animation: skyPulse 7s ease-in-out infinite alternate;
}

body::after {
  top: 52%;
  height: 62%;
  background:
    linear-gradient(180deg, rgba(139, 64, 255, 0.08), rgba(9, 5, 17, 0.8)),
    repeating-linear-gradient(
      0deg,
      rgba(62, 244, 255, 0.15) 0 2px,
      transparent 2px 28px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(255, 63, 176, 0.18) 0 1px,
      transparent 1px 62px
    );
  transform-origin: top center;
  transform: perspective(650px) rotateX(62deg);
  animation: gridRush 9s linear infinite;
}

.app-shell {
  max-width: 1360px;
  margin: 0 auto;
  padding: 20px 18px 30px;
  position: relative;
  z-index: 1;
  overflow-x: clip;
}

.app-shell::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 118px;
  height: 120px;
  background:
    radial-gradient(closest-side, rgba(62, 244, 255, 0.42), transparent 72%),
    radial-gradient(closest-side, rgba(255, 63, 176, 0.36), transparent 76%);
  filter: blur(22px);
  opacity: 0.6;
  animation: waveDrift 6.5s ease-in-out infinite;
  transform: scaleX(1.15);
  pointer-events: none;
}

.welcome-header {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  position: relative;
}

.welcome-header h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin: 0 0 12px 0;
  letter-spacing: 3px;
  font-family: 'Orbitron', monospace;
}

.welcome-header .synth {
  color: var(--neon-cyan);
  text-shadow: 0 0 20px rgba(62, 244, 255, 0.8), 0 0 40px rgba(62, 244, 255, 0.5);
}

.welcome-header .ia {
  color: #da00ff;
  text-shadow: 0 0 20px rgba(218, 0, 255, 0.8), 0 0 40px rgba(218, 0, 255, 0.5);
  font-style: italic;
  font-weight: 700;
}

.welcome-header::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -14px;
  width: min(640px, 88%);
  height: 10px;
  transform: translateX(-50%);
  background:
    radial-gradient(circle at 10% 50%, rgba(62, 244, 255, 0.7), transparent 35%),
    radial-gradient(circle at 50% 50%, rgba(255, 63, 176, 0.65), transparent 34%),
    radial-gradient(circle at 90% 50%, rgba(139, 64, 255, 0.7), transparent 35%);
  filter: blur(8px);
  border-radius: 999px;
  animation: waveDrift 5.8s ease-in-out infinite;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 11px;
  color: var(--neon-cyan);
  text-shadow: 0 0 12px rgba(62, 244, 255, 0.7);
}

.logo-wrap {
  width: min(700px, 96%);
  margin: 0 auto 2px;
  padding: 0;
  border: 0;
  background: none;
  box-shadow: none;
}

.logo-image {
  display: block;
  width: 100%;
  max-height: 186px;
  object-fit: contain;
  filter:
    drop-shadow(0 0 8px rgba(255, 63, 176, 0.72))
    drop-shadow(0 0 26px rgba(62, 244, 255, 0.52))
    drop-shadow(0 0 50px rgba(139, 64, 255, 0.42));
  animation: logoFloat 4.2s ease-in-out infinite;
}

.welcome-text {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 20px;
  text-align: left;
}

.welcome-intro {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  color: var(--text-main);
  text-align: center;
  margin-bottom: 24px;
  line-height: 1.6;
}

.features-guide {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 63, 176, 0.2);
  border-radius: 12px;
  padding: 20px 24px;
  margin-top: 16px;
}

.features-guide h3 {
  margin: 0 0 14px 0;
  color: var(--neon-cyan);
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-shadow: 0 0 10px rgba(62, 244, 255, 0.6);
}

.features-list {
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
}

.features-list li {
  margin-bottom: 10px;
  color: var(--text-soft);
  font-size: clamp(0.88rem, 2vw, 0.98rem);
  line-height: 1.5;
  position: relative;
}

.features-list li::before {
  content: '▸';
  position: absolute;
  left: -20px;
  color: var(--neon-magenta);
  text-shadow: 0 0 8px rgba(255, 63, 176, 0.7);
}

.features-list li strong {
  color: var(--neon-magenta);
  font-weight: 600;
  text-shadow: 0 0 6px rgba(255, 63, 176, 0.4);
}

.sub-list {
  margin: 8px 0 0 20px;
  padding: 0 0 0 20px;
  list-style: none;
  color: var(--text-soft);
  font-size: 0.95em;
}

.sub-list li {
  margin-bottom: 5px;
  padding-left: 0;
}

.sub-list li::before {
  content: '○';
  position: absolute;
  left: -20px;
  color: var(--neon-cyan);
  text-shadow: 0 0 6px rgba(62, 244, 255, 0.5);
  font-weight: bold;
}

.sub-list li em {
  color: var(--neon-cyan);
  font-style: italic;
  text-shadow: 0 0 4px rgba(62, 244, 255, 0.3);
}

.subtitle {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: clamp(0.92rem, 2.2vw, 1.04rem);
}

#mainContainer {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-l);
  box-shadow:
    var(--panel-glow),
    inset 0 0 20px rgba(139, 64, 255, 0.17),
    0 0 0 1px rgba(62, 244, 255, 0.12);
  backdrop-filter: blur(6px);
}

.keyboard-section {
  padding: 18px;
}

#keyboard {
  display: flex;
  justify-content: center;
  width: 100%;
  padding: 20px 14px;
  border-radius: 16px;
  border: 1px solid rgba(62, 244, 255, 0.38);
  background:
    linear-gradient(180deg, rgba(21, 10, 43, 0.92), rgba(10, 4, 23, 0.92)),
    radial-gradient(circle at 50% 0, rgba(62, 244, 255, 0.14), transparent 60%);
  box-shadow:
    inset 0 0 20px rgba(62, 244, 255, 0.16),
    0 0 22px rgba(62, 244, 255, 0.2),
    0 0 34px rgba(255, 63, 176, 0.18);
  user-select: none;
  touch-action: none;
  overflow-x: auto;
}

.key {
  width: 44px;
  height: 190px;
  margin: 0 1px;
  border: 1px solid rgba(255, 63, 176, 0.45);
  border-bottom-width: 4px;
  border-radius: 0 0 11px 11px;
  background: linear-gradient(180deg, var(--keyboard-white-top), var(--keyboard-white-bottom));
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  cursor: pointer;
  color: #51176e;
  font-size: 11px;
  font-weight: 700;
  transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease;
}

.key:hover {
  transform: translateY(1px);
  box-shadow: inset 0 -5px 12px rgba(255, 63, 176, 0.16);
}

.key.black {
  width: 30px;
  height: 118px;
  margin-left: -15px;
  margin-right: -15px;
  z-index: 3;
  border-radius: 0 0 9px 9px;
  border-color: rgba(62, 244, 255, 0.55);
  border-bottom-width: 3px;
  background: linear-gradient(180deg, var(--keyboard-black-top), var(--keyboard-black-bottom));
  color: #bdf6ff;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.55);
}

.key.black:hover {
  box-shadow: 0 0 16px rgba(62, 244, 255, 0.4);
}

.key .shortcut-hint {
  display: block;
  opacity: 0;
  font-size: 10px;
  color: var(--neon-violet);
  text-shadow: 0 0 9px rgba(139, 64, 255, 0.8);
  transition: opacity 160ms ease;
}

.key.black .shortcut-hint {
  color: var(--neon-cyan);
  text-shadow: 0 0 9px rgba(62, 244, 255, 0.95);
}

.shortcuts-visible .key .shortcut-hint {
  opacity: 1;
}

.keyboard-toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  margin-bottom: 2px;
  gap: 12px;
}

.tooltip-display-area {
  padding: 8px 12px;
  margin-top: 8px;
  background: rgba(62, 244, 255, 0.1);
  border: 1px solid rgba(62, 244, 255, 0.4);
  border-radius: var(--radius-s);
  color: var(--neon-cyan);
  font-size: 12px;
  min-height: 20px;
  display: flex;
  align-items: center;
  text-shadow: 0 0 8px rgba(62, 244, 255, 0.5);
  box-shadow: 0 0 12px rgba(62, 244, 255, 0.15);
}

.keyboard-toggle-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(62, 244, 255, 0.36);
  background: linear-gradient(160deg, rgba(22, 10, 46, 0.9), rgba(10, 6, 26, 0.92));
  box-shadow:
    0 0 16px rgba(62, 244, 255, 0.16),
    inset 0 0 12px rgba(255, 63, 176, 0.12);
  cursor: pointer;
  user-select: none;
}

.keyboard-toggle-pill input[type='checkbox'] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
}

.toggle-track {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid rgba(255, 63, 176, 0.5);
  background: rgba(10, 8, 25, 0.95);
  box-shadow: inset 0 0 8px rgba(255, 63, 176, 0.22);
  transition: background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.toggle-track::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(180deg, #ff77d0, #ff3fb0);
  box-shadow: 0 0 10px rgba(255, 63, 176, 0.6);
  transition: transform 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.keyboard-toggle-pill input[type='checkbox']:checked + .toggle-track {
  border-color: rgba(62, 244, 255, 0.8);
  background: linear-gradient(90deg, rgba(255, 63, 176, 0.32), rgba(62, 244, 255, 0.38));
  box-shadow:
    inset 0 0 10px rgba(62, 244, 255, 0.3),
    0 0 14px rgba(62, 244, 255, 0.25);
}

.keyboard-toggle-pill input[type='checkbox']:checked + .toggle-track::before {
  transform: translateX(20px);
  background: linear-gradient(180deg, #9ffcff, #3ef4ff);
  box-shadow: 0 0 11px rgba(62, 244, 255, 0.8);
}

.keyboard-toggle-pill input[type='checkbox']:focus-visible + .toggle-track {
  outline: 2px solid rgba(62, 244, 255, 0.75);
  outline-offset: 2px;
}

.toggle-text {
  color: #d9e3ff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-shadow: 0 0 8px rgba(62, 244, 255, 0.25);
}

.controls {
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(62, 244, 255, 0.35);
  background: rgba(11, 6, 24, 0.72);
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
  gap: 10px;
}

.primary-control-grid {
  grid-template-columns: repeat(4, minmax(150px, 1fr));
}

.advanced-settings {
  margin-top: 12px;
  border-radius: var(--radius-s);
  border: 1px solid rgba(62, 244, 255, 0.34);
  background: linear-gradient(160deg, rgba(18, 11, 37, 0.85), rgba(10, 6, 24, 0.92));
  box-shadow:
    inset 0 0 12px rgba(62, 244, 255, 0.08),
    0 0 20px rgba(62, 244, 255, 0.12);
}

.advanced-settings > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
  padding: 11px 14px;
  color: var(--neon-cyan);
  font-family: 'Orbitron', sans-serif;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.advanced-settings > summary::-webkit-details-marker {
  display: none;
}

.advanced-settings > summary::after {
  content: '▾';
  color: #ff8fd5;
  font-size: 14px;
  transition: transform 120ms ease;
}

.advanced-settings[open] > summary::after {
  transform: rotate(180deg);
}

.advanced-settings-body {
  padding: 10px;
  border-top: 1px solid rgba(255, 63, 176, 0.25);
}

.advanced-control-grid {
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 10px;
  border-radius: var(--radius-s);
  border: 1px solid rgba(255, 63, 176, 0.32);
  background: linear-gradient(160deg, rgba(31, 15, 62, 0.88), rgba(16, 8, 34, 0.9));
  color: #f5d4ff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.01em;
  position: relative;
}

.control-item-toggle {
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  font-size: 13px;
}

.btn-tooltip-wrapper {
  position: relative;
  display: inline-block;
}

.btn-tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 6px;
  padding: 8px 12px;
  background: rgba(62, 244, 255, 0.15);
  border: 1px solid rgba(62, 244, 255, 0.6);
  border-radius: var(--radius-s);
  color: var(--neon-cyan);
  font-size: 12px;
  white-space: nowrap;
  z-index: 100;
  box-shadow: 0 0 20px rgba(62, 244, 255, 0.3);
  text-shadow: 0 0 8px rgba(62, 244, 255, 0.5);
  pointer-events: none;
}

.btn-tooltip-wrapper:hover .btn-tooltip {
  display: block;
  animation: tooltipAppear 0.2s ease-out;
}

.runtime-tooltip.show {
  display: block;
  animation: tooltipAppear 0.2s ease-out;
}

@keyframes tooltipAppear {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

select,
button {
  font-family: 'Space Mono', monospace;
}

select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid rgba(62, 244, 255, 0.42);
  border-radius: 9px;
  background: rgba(10, 6, 22, 0.92);
  color: var(--neon-cyan);
  font-size: 13px;
}

select:focus,
button:focus,
input[type='checkbox']:focus {
  outline: 2px solid rgba(62, 244, 255, 0.6);
  outline-offset: 1px;
}

input[type='checkbox'] {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  border: 2px solid var(--neon-pink);
  background: rgba(11, 6, 24, 0.95);
  position: relative;
  cursor: pointer;
  box-shadow: inset 0 0 8px rgba(255, 63, 176, 0.2);
}

input[type='checkbox']::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid var(--neon-cyan);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: transform 90ms ease;
  filter: drop-shadow(0 0 5px rgba(62, 244, 255, 0.8));
}

input[type='checkbox']:checked {
  background: rgba(255, 63, 176, 0.26);
  box-shadow:
    inset 0 0 10px rgba(255, 63, 176, 0.6),
    0 0 10px rgba(255, 63, 176, 0.45);
}

input[type='checkbox']:checked::after {
  transform: rotate(45deg) scale(1);
}

.action-row {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.45);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: saturate(1.1) brightness(1.08);
}

.btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(180deg, #ff4fbd, #d42f8e);
  box-shadow: 0 0 18px rgba(255, 79, 189, 0.45);
}

.btn-secondary {
  background: linear-gradient(180deg, #5464ff, #383fbc);
  box-shadow: 0 0 15px rgba(84, 100, 255, 0.38);
}

.btn-game {
  background: linear-gradient(180deg, #43d3ff, #2f9bff);
  color: #041322;
  text-shadow: none;
  box-shadow: 0 0 18px rgba(67, 211, 255, 0.45);
}

.btn-danger {
  background: linear-gradient(180deg, #ff6688, #e9385f);
  box-shadow: 0 0 18px rgba(255, 102, 136, 0.42);
}

#status {
  margin-left: auto;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(62, 244, 255, 0.6);
  background: rgba(10, 9, 28, 0.8);
  color: var(--neon-green);
  text-shadow: 0 0 8px rgba(138, 255, 199, 0.75);
  font-size: 12px;
  font-weight: 700;
}

.monitor-section {
  overflow: hidden;
}

.turn-grid-section {
  overflow: hidden;
}

.turn-grid-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255, 63, 176, 0.28);
  background:
    linear-gradient(180deg, rgba(40, 17, 78, 0.86), rgba(18, 8, 36, 0.78)),
    radial-gradient(circle at 14% 30%, rgba(62, 244, 255, 0.16), transparent 48%);
}

.turn-grid-header h4 {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
  text-shadow: 0 0 12px rgba(62, 244, 255, 0.75);
}

#gridPhaseBadge {
  border-radius: 999px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 63, 176, 0.5);
  background: rgba(10, 8, 23, 0.82);
  color: #f9d0ff;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow:
    inset 0 0 8px rgba(255, 63, 176, 0.16),
    0 0 12px rgba(255, 63, 176, 0.2);
}

.turn-grid-body {
  padding: 12px;
  display: grid;
  gap: 10px;
}

.turn-grid-lane {
  border-radius: 12px;
  border: 1px solid rgba(62, 244, 255, 0.24);
  background:
    linear-gradient(180deg, rgba(13, 8, 28, 0.92), rgba(8, 4, 20, 0.95)),
    repeating-linear-gradient(
      90deg,
      rgba(62, 244, 255, 0.04) 0 1px,
      transparent 1px 40px
    );
  box-shadow:
    inset 0 0 16px rgba(62, 244, 255, 0.08),
    inset 0 0 24px rgba(255, 63, 176, 0.06);
  padding: 8px 10px 10px;
}

.turn-grid-lane.user-lane {
  border-color: rgba(62, 244, 255, 0.32);
}

.turn-grid-lane.ai-lane {
  border-color: rgba(255, 63, 176, 0.36);
}

.turn-grid-lane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
}

.lane-label {
  font-family: 'Orbitron', sans-serif;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #ddf9ff;
}

.lane-meta {
  color: #c5d5ff;
  font-size: 11px;
}

.turn-grid-canvas {
  display: block;
  width: 100%;
  height: 124px;
  border-radius: 10px;
  border: 1px solid rgba(62, 244, 255, 0.2);
  background: rgba(5, 3, 15, 0.75);
}

#countdownOverlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(11, 7, 25, 0.2), rgba(4, 2, 12, 0.72));
  opacity: 0;
  pointer-events: none;
  z-index: 30;
  transition: opacity 220ms ease;
}

#countdownOverlay.active {
  opacity: 1;
}

#countdownText {
  min-width: 180px;
  padding: 20px 28px;
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  letter-spacing: 0.08em;
  font-size: clamp(2.8rem, 10vw, 6.2rem);
  color: #c2feff;
  text-shadow:
    0 0 20px rgba(62, 244, 255, 0.72),
    0 0 42px rgba(62, 244, 255, 0.45),
    0 0 76px rgba(139, 64, 255, 0.36);
  transform: scale(0.84);
  opacity: 0;
}

#countdownOverlay.active #countdownText.pulse {
  animation: countdownPulse 560ms ease both;
}

#countdownOverlay.active #countdownText.go {
  color: #ffd8f2;
  text-shadow:
    0 0 18px rgba(255, 63, 176, 0.88),
    0 0 44px rgba(255, 63, 176, 0.56),
    0 0 84px rgba(62, 244, 255, 0.35);
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(62, 244, 255, 0.28);
  background: linear-gradient(180deg, rgba(33, 16, 70, 0.85), rgba(20, 9, 40, 0.75));
}

.terminal-header h4 {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--neon-pink);
  text-shadow: 0 0 12px rgba(255, 63, 176, 0.8);
}

#terminal {
  margin: 0;
  min-height: 220px;
  max-height: 320px;
  overflow-y: auto;
  padding: 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
  background:
    radial-gradient(700px 220px at 100% 0, rgba(62, 244, 255, 0.18), transparent 62%),
    #07040f;
  color: #a5ffd2;
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  line-height: 1.35;
}

#terminal .note-on {
  color: #8affc7;
  text-shadow: 0 0 8px rgba(138, 255, 199, 0.75);
}

#terminal .note-off {
  color: #8dc5ff;
  text-shadow: 0 0 8px rgba(141, 197, 255, 0.7);
}

#terminal .timestamp {
  color: #ffdd84;
  text-shadow: 0 0 8px rgba(255, 221, 132, 0.7);
}

#terminal::-webkit-scrollbar {
  width: 10px;
}

#terminal::-webkit-scrollbar-track {
  background: rgba(8, 5, 18, 0.7);
}

#terminal::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background: linear-gradient(180deg, #ff3fb0, #8b40ff);
}

@keyframes logoFloat {
  0% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-4px) scale(1.01);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes waveDrift {
  0% {
    transform: translateX(-2%) translateY(0);
  }
  50% {
    transform: translateX(2%) translateY(6px);
  }
  100% {
    transform: translateX(-2%) translateY(0);
  }
}

@keyframes skyPulse {
  0% {
    opacity: 0.82;
    filter: hue-rotate(0deg);
  }
  100% {
    opacity: 1;
    filter: hue-rotate(12deg);
  }
}

@keyframes gridRush {
  0% {
    background-position: 0 0, 0 0, 0 0;
  }
  100% {
    background-position: 0 0, 0 220px, 62px 0;
  }
}

@keyframes countdownPulse {
  0% {
    opacity: 0;
    transform: translateY(8px) scale(0.78);
  }
  35% {
    opacity: 1;
    transform: translateY(0) scale(1.08);
  }
  100% {
    opacity: 0.2;
    transform: translateY(-2px) scale(0.98);
  }
}

@media (max-width: 980px) {
  .app-shell {
    padding: 16px 12px 24px;
  }

  .keyboard-section {
    padding: 12px;
  }

  .controls {
    padding: 12px;
  }

  .turn-grid-body {
    padding: 10px;
  }

  .key {
    width: 35px;
    height: 158px;
    font-size: 9px;
  }

  .key.black {
    width: 24px;
    height: 98px;
    margin-left: -12px;
    margin-right: -12px;
  }

  .control-grid {
    grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  }

  .primary-control-grid {
    grid-template-columns: repeat(2, minmax(145px, 1fr));
  }
}

@media (max-width: 640px) {
  .welcome-header {
    margin-bottom: 12px;
  }

  .logo-wrap {
    width: min(560px, 98%);
    padding: 0;
  }

  .logo-image {
    max-height: 132px;
  }

  .control-grid {
    grid-template-columns: 1fr 1fr;
  }

  .primary-control-grid {
    grid-template-columns: 1fr 1fr;
  }

  .keyboard-toggle-row {
    justify-content: center;
    margin-top: 12px;
  }

  #status {
    margin-left: 0;
    width: 100%;
    text-align: center;
  }

  #terminal {
    min-height: 180px;
    font-size: 11px;
  }

  .turn-grid-canvas {
    height: 108px;
  }
}

@media (max-width: 480px) {
  .app-shell::before {
    top: 90px;
    height: 80px;
  }

  .control-grid {
    grid-template-columns: 1fr;
  }

  .primary-control-grid {
    grid-template-columns: 1fr;
  }

  #keyboard {
    justify-content: flex-start;
  }

  .key {
    width: 27px;
    height: 126px;
    font-size: 8px;
  }

  .key.black {
    width: 18px;
    height: 76px;
    margin-left: -9px;
    margin-right: -9px;
  }
}

.welcome-header-inner { text-align: center; flex: 1; }

.synthia-logo {
  margin: 0 auto 4px;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 3.2rem;
  letter-spacing: 0.12em;
  color: var(--neon-pink);
  text-shadow:
    0 0 8px rgba(255, 63, 176, 0.72),
    0 0 26px rgba(62, 244, 255, 0.52),
    0 0 50px rgba(139, 64, 255, 0.42);
}
.synthia-logo em {
  font-style: italic;
  color: var(--neon-cyan);
}

/* Gear button */
.settings-toggle-btn {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(62,244,255,0.5);
  background: rgba(11,6,24,0.85); color: var(--neon-cyan); font-size: 22px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 14px rgba(62,244,255,0.25);
  transition: box-shadow 150ms, border-color 150ms, transform 150ms ease;
}
.settings-toggle-btn:hover {
  border-color: rgba(62,244,255,0.85); box-shadow: 0 0 22px rgba(62,244,255,0.5);
  transform: translateY(-50%) rotate(30deg);
}

/* Backdrop */
.settings-backdrop {
  position: fixed; inset: 0; background: rgba(4,2,12,0.55); z-index: 999;
  opacity: 0; pointer-events: none; transition: opacity 260ms ease;
  backdrop-filter: blur(2px);
}
.settings-backdrop.open { opacity: 1; pointer-events: auto; }

/* Settings panel */
.settings-panel {
  position: fixed; top: 0; right: 0; height: 100%; width: 320px; z-index: 1000;
  background: rgba(13,7,28,0.97);
  border-left: 1px solid rgba(255,67,176,0.45);
  box-shadow: -6px 0 42px rgba(255,63,176,0.2), -2px 0 12px rgba(62,244,255,0.1);
  backdrop-filter: blur(12px);
  transform: translateX(100%); transition: transform 280ms cubic-bezier(0.4,0,0.2,1);
  overflow-y: auto; display: flex; flex-direction: column;
}
.settings-panel.open { transform: translateX(0); }

.settings-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px; border-bottom: 1px solid rgba(62,244,255,0.28);
  background: linear-gradient(180deg, rgba(28,12,58,0.95), rgba(15,7,34,0.9));
  position: sticky; top: 0; z-index: 1; flex-shrink: 0;
}
.settings-panel-title {
  font-family: 'Orbitron', sans-serif; font-size: 13px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--neon-cyan);
  text-shadow: 0 0 12px rgba(62,244,255,0.65);
}
.settings-close-btn {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(255,63,176,0.45); background: rgba(14,7,30,0.9);
  color: var(--neon-pink); font-size: 20px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: box-shadow 140ms, border-color 140ms;
}
.settings-close-btn:hover { border-color: var(--neon-pink); box-shadow: 0 0 16px rgba(255,63,176,0.45); }

.settings-panel-body { padding: 16px; flex: 1; }
.settings-control-grid { display: flex; flex-direction: column; gap: 10px; }

/* Big game toggle button */
.game-btn-row { display: flex; justify-content: center; padding: 20px 0 8px; }
.btn-game-toggle {
  min-width: 200px; min-height: 56px; padding: 14px 36px;
  font-size: 16px; font-family: 'Orbitron', sans-serif; letter-spacing: 0.1em;
  border-radius: 14px;
  box-shadow: 0 0 24px rgba(67,211,255,0.5), 0 0 48px rgba(67,211,255,0.2);
  transition: transform 120ms ease, box-shadow 120ms ease, background 200ms ease;
}
.btn-game-toggle.active {
  background: linear-gradient(180deg, #ff6688, #e9385f); color: #fff;
  box-shadow: 0 0 24px rgba(255,102,136,0.55), 0 0 48px rgba(255,102,136,0.25);
}

@media (max-width: 640px) {
  .settings-panel { width: 100%; max-width: 320px; }
  .btn-game-toggle { min-width: 160px; width: 100%; max-width: 340px; font-size: 15px; }
  .game-btn-row { padding: 16px 0 6px; }
}
@media (max-width: 480px) {
  .settings-panel { max-width: 100%; }
}