:root {
  --bg: #f4f7fb;
  --bg-soft: #ffffff;
  --panel: #ffffff;
  --panel-alt: #f8fbff;
  --text: #1d2a39;
  --muted: #68778b;
  --line: #d8e1ed;
  --primary: #4f7cff;
  --primary-dark: #3d68e6;
  --good: #d9f7e7;
  --good-line: #6ac792;
  --bad: #ffe2e5;
  --bad-line: #ef7a86;
  --selected: #e8f0ff;
  --selected-line: #7da0ff;
  --shadow: 0 14px 34px rgba(72, 96, 130, 0.12);
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --font-ui: "Trebuchet MS", "Segoe UI", sans-serif;
}

body[data-theme="dark"] {
  --bg: #181a1f;
  --bg-soft: #252830;
  --panel: #1e2128;
  --panel-alt: #242830;
  --text: #edf1f7;
  --muted: #b2bac8;
  --line: #373d48;
  --primary: #d8dee8;
  --primary-dark: #e6ebf3;
  --good: #1d3a29;
  --good-line: #63b27d;
  --bad: #47262b;
  --bad-line: #de737f;
  --selected: #313743;
  --selected-line: #8f98a8;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
}

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

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

body {
  font-family: var(--font-ui);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(95, 170, 255, 0.18), transparent 26%),
    linear-gradient(180deg, #f8fbff 0%, #eef4fb 100%);
}

body[data-theme="dark"] {
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 26%),
    linear-gradient(180deg, #24272f 0%, #14161b 100%);
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

.page-shell {
  width: min(720px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 10px 0 18px;
}

.site-header {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 8px;
}

.header-spacer {
  display: none;
}

.theme-toggle {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.theme-toggle__input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-toggle__track {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 92px;
  padding: 5px 7px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.theme-toggle__icon {
  width: 18px;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--muted);
}

.theme-toggle__thumb {
  position: relative;
  width: 36px;
  height: 20px;
  border-radius: 999px;
  background: var(--selected);
  border: 1px solid var(--selected-line);
  flex: 0 0 auto;
}

.theme-toggle__thumb::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  transition: transform 160ms ease;
}

.theme-toggle__input:checked + .theme-toggle__track .theme-toggle__thumb::after {
  transform: translateX(16px);
}

.logo-home {
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  width: min(300px, 72vw);
  height: 96px;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.site-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.screen-title,
.results-title {
  margin: 0;
}

.gate-card {
  max-width: 520px;
  margin: 0 auto;
}

.gate-field {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
}

.gate-input-wrap {
  position: relative;
  flex: 1 1 auto;
}

.gate-input {
  width: 100%;
  padding: 14px 48px 14px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  font: inherit;
}

.gate-input:focus {
  outline: 2px solid rgba(79, 124, 255, 0.18);
  border-color: var(--selected-line);
}

.gate-eye {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 4px;
}

.gate-error {
  min-height: 22px;
  margin-top: 10px;
  color: #d75c69;
  font-weight: 700;
}

.gate-help {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.gate-eye svg {
  width: 20px;
  height: 20px;
  display: block;
}

.screen-subtitle,
.mode-card p,
.feedback,
.results-subtitle,
.miss-list {
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--primary);
}

.app-shell {
  display: block;
}

.panel,
.game-card,
.results-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.panel,
.results-card {
  padding: 24px;
}

.home-intro {
  text-align: center;
}

.home-logo {
  display: none;
}

.screen-title {
  font-size: 2rem;
  margin-bottom: 8px;
}

.screen-subtitle {
  margin: 0 auto 20px;
  max-width: 520px;
}

.primary-button,
.secondary-button,
.answer-button,
.size-button,
.back-button {
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.primary-button,
.secondary-button,
.back-button,
.size-button,
.answer-button {
  border: 1px solid var(--line);
}

.primary-button {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.primary-button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.secondary-button,
.back-button,
.size-button,
.answer-button {
  background: var(--bg-soft);
  color: var(--text);
}

.secondary-button:hover,
.back-button:hover,
.size-button:hover,
.answer-button:hover {
  background: #f3f7fd;
  transform: translateY(-1px);
}

body[data-theme="dark"] .secondary-button,
body[data-theme="dark"] .back-button,
body[data-theme="dark"] .size-button,
body[data-theme="dark"] .answer-button,
body[data-theme="dark"] .gate-input {
  background: #252830;
  color: var(--text);
  border-color: var(--line);
}

body[data-theme="dark"] .secondary-button:hover,
body[data-theme="dark"] .back-button:hover,
body[data-theme="dark"] .size-button:hover,
body[data-theme="dark"] .answer-button:hover {
  background: #313641;
  transform: translateY(-1px);
}

body[data-theme="dark"] .primary-button {
  background: #d8dee8;
  border-color: #d8dee8;
  color: #17191e;
}

body[data-theme="dark"] .primary-button:hover {
  background: #e6ebf3;
}

.primary-button:disabled,
.answer-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.mode-list {
  display: grid;
  gap: 14px;
}

.mode-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-alt);
  padding: 18px;
}

.mode-card h3 {
  margin: 0 0 6px;
}

.size-row,
.action-row,
.top-bar,
.stats-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.top-bar {
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.stats-row {
  align-items: center;
}

.pill {
  padding: 7px 12px;
  border-radius: 999px;
  background: #edf3ff;
  color: #3556b7;
  font-weight: 700;
}

body[data-theme="dark"] .pill {
  background: #2c313b;
  color: #edf1f7;
}

.size-button.is-active,
.answer-button.is-selected {
  background: var(--selected);
  border-color: var(--selected-line);
}

body[data-theme="dark"] .size-button.is-active,
body[data-theme="dark"] .answer-button.is-selected {
  background: var(--selected);
  border-color: var(--selected-line);
  color: var(--text);
}

.game-card {
  padding: 22px;
}

.flag-wrap {
  background: linear-gradient(180deg, #fbfdff 0%, #f2f6fb 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  min-height: 180px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}

body[data-theme="dark"] .flag-wrap {
  background: linear-gradient(180deg, #2a2e37 0%, #20242b 100%);
}

.flag-emoji {
  font-size: clamp(4.8rem, 14vw, 8rem);
  line-height: 1;
}

.feedback-slot {
  min-height: 58px;
  margin-bottom: 12px;
}

.answers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.answer-button {
  min-height: 64px;
  font-weight: 700;
  text-align: left;
}

.answer-button.is-correct {
  background: var(--good);
  border-color: var(--good-line);
}

.answer-button.is-wrong {
  background: var(--bad);
  border-color: var(--bad-line);
}

body[data-theme="dark"] .answer-button.is-correct {
  background: var(--good);
  border-color: var(--good-line);
  color: #edf1f7;
}

body[data-theme="dark"] .answer-button.is-wrong {
  background: var(--bad);
  border-color: var(--bad-line);
  color: #edf1f7;
}

.action-row {
  justify-content: space-between;
  align-items: center;
  margin-top: 18px;
}

.feedback {
  margin-top: 0;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: #f8fbff;
  border: 1px solid var(--line);
}

body[data-theme="dark"] .feedback {
  background: #252830;
}

body[data-theme="dark"] .gate-eye {
  color: #c7d0de;
}

.feedback strong {
  display: block;
  color: var(--text);
  margin-bottom: 4px;
}

.results-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}

.stat-box {
  background: var(--panel-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px 14px;
  text-align: center;
}

.stat-box strong {
  display: block;
  font-size: 1.8rem;
  margin-bottom: 6px;
}

.miss-list {
  margin: 0 0 20px;
  padding-left: 18px;
}

.loading,
.error-box {
  text-align: center;
  padding: 36px 18px;
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 16px, 100%);
    padding-top: 8px;
  }

  .site-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .theme-toggle {
    position: static;
    transform: none;
  }

  .answers-grid,
  .results-stats {
    grid-template-columns: 1fr;
  }

  .top-bar,
  .action-row {
    flex-direction: column;
    align-items: stretch;
  }
}