:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --bg-accent: #eef2f7;
  --surface: #ffffff;
  --surface-strong: #f8fafc;
  --text: #202124;
  --muted: #5f6368;
  --accent: #1a73e8;
  --accent-strong: #185abc;
  --accent-soft: #e8f0fe;
  --warning: #c87b00;
  --success: #1f8a4c;
  --error: #c2493f;
  --border: #dfe3eb;
  --shadow: 0 2px 8px rgba(32, 33, 36, 0.08);
  --radius: 20px;
  --radius-small: 14px;
  --tap: 56px;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: linear-gradient(180deg, var(--bg), var(--bg-accent));
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
}

body.high-contrast {
  --bg: #fffdf5;
  --surface: #ffffff;
  --surface-strong: #fff6d8;
  --text: #111111;
  --muted: #2a2a2a;
  --accent: #0f5a47;
  --accent-strong: #093f32;
  --accent-soft: #e6f4ef;
  --border: rgba(17, 17, 17, 0.32);
  --shadow: 0 0 0 rgba(0, 0, 0, 0);
}

button,
select,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

#app {
  display: block;
  min-height: 100vh;
}

.app-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 12px 14px 30px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 10px 0 8px;
}

.brand {
  text-align: center;
  flex: 1;
}

.brand h1,
.hero h2,
.settings-card h2,
.game-card h2 {
  margin: 0;
  line-height: 1.05;
}

.brand h1 {
  font-size: clamp(1.45rem, 4vw, 2.2rem);
  letter-spacing: -0.03em;
}

.eyebrow {
  margin: 0 0 4px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.icon-button,
.primary-button,
.secondary-button,
.ghost-button {
  border-radius: 999px;
  transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease, border-color 120ms ease;
}

.icon-button {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: #ffffff;
  color: var(--text);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.mode-card:hover {
  transform: translateY(-1px);
}

.screen-area {
  display: grid;
  gap: 14px;
}

.screen {
  display: none;
  gap: 16px;
}

.screen.active {
  display: grid;
  animation: fadeIn 220ms ease;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.score-chip {
  min-width: 86px;
  padding: 8px 12px;
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.score-chip__label {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.score-chip__value {
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--accent);
}

.round-meter {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
}

.round-meter__track {
  height: 14px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(23, 49, 43, 0.08);
  border: 1px solid rgba(23, 49, 43, 0.08);
}

.round-meter__fill {
  width: 100%;
  height: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: inherit;
}

.round-meter__fill[data-tone="warning"] {
  background: linear-gradient(90deg, var(--accent), var(--warning));
}

.round-meter__fill[data-tone="error"] {
  background: linear-gradient(90deg, var(--accent), var(--error));
}

.round-meter__fill[data-tone="success"] {
  background: linear-gradient(90deg, var(--accent), var(--success));
}

.round-meter__label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted);
  text-align: center;
}

.hero,
.settings-card,
.game-card,
.compact-card,
.stats-card {
  padding: 20px;
}

.stats-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: #ffffff;
}

.stats-score {
  min-width: 88px;
  padding: 16px 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: white;
  text-align: center;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 900;
  box-shadow: 0 12px 24px rgba(21, 106, 120, 0.22);
}

.hero p,
.compact-card p,
.settings-card p,
.game-card p,
.support-message,
.hint {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.hero {
  overflow: visible;
}

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

.mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.mode-card {
  min-height: 196px;
  padding: 24px 22px;
  display: grid;
  gap: 16px;
  align-content: center;
  justify-items: center;
  text-align: center;
  border-radius: 28px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 10px 22px rgba(32, 33, 36, 0.14);
}

.mode-card#readingModeButton {
  background: linear-gradient(145deg, #e8f0fe, #d2e3fc);
}

.mode-card#findingModeButton {
  background: linear-gradient(145deg, #e6f4ea, #ceead6);
}

.mode-icon {
  font-size: 3.1rem;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.mode-title {
  font-size: clamp(1.55rem, 5vw, 2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: #1f1f1f;
}

.compact-row,
.button-row,
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.button-row {
  margin-top: 8px;
}

.button-row.wrap {
  flex-wrap: wrap;
  justify-content: flex-start;
}

.primary-button,
.secondary-button,
.ghost-button {
  min-height: var(--tap);
  padding: 0 20px;
  font-weight: 800;
  box-shadow: none;
}

.primary-button {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: white;
  box-shadow: 0 6px 14px rgba(26, 115, 232, 0.28);
}

.secondary-button {
  background: white;
  color: var(--accent-strong);
  border: 1px solid var(--border);
}

.ghost-button {
  background: transparent;
  color: var(--text);
  border: 1px dashed var(--border);
}

.number-display {
  display: grid;
  place-items: center;
  min-height: 196px;
  margin: 14px 0;
  padding: 16px;
  border-radius: 24px;
  background:
    radial-gradient(circle at top, rgba(255,255,255,0.98), transparent 36%),
    linear-gradient(180deg, #ffffff, #f8fafc);
  border: 1px solid var(--border);
  font-size: clamp(4rem, 18vw, 8.2rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--accent-strong);
  text-shadow: 0 4px 0 rgba(255,255,255,0.6);
}

.status-message {
  min-height: 1.5em;
  font-size: 1.05rem;
  font-weight: 700;
}

.verdict {
  min-height: 68px;
  padding: 16px 18px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  border: 2px solid transparent;
  font-size: 1.15rem;
  font-weight: 900;
  text-align: center;
  letter-spacing: 0.01em;
}

.verdict--neutral {
  background: #f5f8f7;
  color: var(--muted);
  border-color: rgba(23, 49, 43, 0.08);
}

.verdict--success {
  background: #e7f8ee;
  color: var(--success);
  border-color: rgba(31, 138, 76, 0.24);
}

.verdict--error {
  background: #fff0ed;
  color: var(--error);
  border-color: rgba(194, 73, 63, 0.24);
}

.verdict--warning {
  background: #fff5e5;
  color: var(--warning);
  border-color: rgba(200, 123, 0, 0.24);
}

.support-message {
  font-size: 0.95rem;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.option-card {
  min-height: 92px;
  padding: 16px;
  border-radius: 16px;
  background: #ffffff;
  border: 2px solid var(--border);
  box-shadow: var(--shadow);
  font-size: clamp(1.35rem, 5vw, 2rem);
  font-weight: 900;
  color: var(--accent-strong);
}

.option-card.correct {
  border-color: rgba(31, 138, 76, 0.85);
  background: linear-gradient(180deg, #effbf3, #dff6e7);
  color: var(--success);
}

.option-card.wrong {
  border-color: rgba(194, 73, 63, 0.82);
  background: linear-gradient(180deg, #fff6f4, #fde7e4);
  color: var(--error);
}

.settings-form {
  display: grid;
  gap: 16px;
  margin-top: 14px;
}

.settings-form label {
  display: grid;
  gap: 8px;
}

.settings-form span,
.settings-form select {
  font-weight: 700;
}

.settings-form select,
.settings-form input[type="checkbox"] {
  min-height: var(--tap);
}

.settings-form select {
  width: 100%;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: white;
  color: var(--text);
}

.toggle-row {
  padding: 10px 0;
  border-bottom: 1px solid rgba(22, 49, 38, 0.08);
}

.toggle-row input {
  width: 28px;
  height: 28px;
}

.floating-status {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  max-width: min(92vw, 620px);
  width: max-content;
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(22, 49, 38, 0.92);
  color: white;
  font-weight: 800;
  text-align: center;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.floating-status.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

.floating-status.success {
  background: rgba(31, 138, 76, 0.96);
}

.floating-status.error {
  background: rgba(194, 73, 63, 0.96);
}

.floating-status.info {
  background: rgba(26, 115, 232, 0.95);
}

.success-flash {
  animation: successPulse 480ms ease;
}

.error-flash {
  animation: errorPulse 360ms ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes successPulse {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.015);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes errorPulse {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

@media (min-width: 720px) {
  .mode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .options-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .screen.active {
    gap: 20px;
  }

  .options-grid {
    gap: 14px;
  }
}

@media (max-width: 500px) {
  .topbar {
    align-items: flex-start;
  }

  .brand {
    text-align: left;
  }

  .score-chip {
    display: none;
  }

  .stats-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}