:root {
  color-scheme: dark;
  font-family: Inter, Roboto, "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --bg: #061112;
  --bg-alt: #071617;
  --text: #f4fbfa;
  --text-soft: #c5d4d1;
  --text-faint: #8aa09c;
  --surface: #0d2021;
  --surface-alt: #132d2e;
  --glass: rgba(16, 39, 41, 0.82);
  --line: #284042;
  --primary: #7ce4dc;
  --primary-strong: #26d6d2;
  --primary-soft: #143e40;
  --green: #78e2ac;
  --green-soft: #153c2e;
  --rose: #ff91aa;
  --rose-soft: #42222c;
  --amber: #f4bf63;
  --amber-soft: #422f13;
  --blue: #94beff;
  --violet: #b4aaff;
  --shadow: rgba(0, 0, 0, 0.32);
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #f8f7f2;
  --bg-alt: #eff8f5;
  --text: #101816;
  --text-soft: #53615e;
  --text-faint: #7c8a86;
  --surface: #fffefa;
  --surface-alt: #f3f6f1;
  --glass: rgba(255, 255, 251, 0.92);
  --line: #e0dcd2;
  --primary: #00a1aa;
  --primary-strong: #00aeb8;
  --primary-soft: #ddf8f4;
  --green: #16845d;
  --green-soft: #e0f5e9;
  --rose: #c94a64;
  --rose-soft: #ffe7ec;
  --amber: #b87510;
  --amber-soft: #f7e8c8;
  --blue: #2f73b7;
  --violet: #7469dd;
  --shadow: rgba(44, 54, 50, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 82% -8%, color-mix(in srgb, var(--primary) 18%, transparent), transparent 38rem),
    linear-gradient(145deg, var(--bg-alt), var(--bg) 52%, var(--bg));
  color: var(--text);
}

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 54%, transparent);
  outline-offset: 3px;
}

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

.app-shell {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px clamp(14px, 4vw, 28px) 36px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.brand {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--text-faint);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand h1,
.brand h2,
.screen-title h1,
.result-title {
  margin: 0;
  color: var(--text);
  font-weight: 950;
  letter-spacing: 0;
  line-height: 1.05;
}

.brand h1 {
  font-size: clamp(26px, 6vw, 48px);
}

.brand h2,
.screen-title h1 {
  font-size: clamp(25px, 5vw, 42px);
}

.subtitle {
  max-width: 620px;
  margin: 8px 0 0;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.45;
}

.theme-picker {
  position: relative;
  flex: 0 0 auto;
  z-index: 20;
}

.theme-button,
.icon-button,
.ghost-button,
.primary-button,
.answer-button,
.ticket-cell,
.pill-button {
  border: 0;
  cursor: pointer;
}

.theme-button {
  min-width: 132px;
  min-height: 44px;
  padding: 0 13px 0 15px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 18px;
  background: var(--glass);
  color: var(--text);
  box-shadow: 0 14px 34px var(--shadow);
  font-weight: 900;
}

.theme-button span {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 10px;
}

.chevron {
  display: inline-block;
  translate: 0 -1px;
  color: var(--primary);
  font-size: 14px;
}

.theme-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 148px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 18px 42px var(--shadow);
}

.theme-menu[hidden] {
  display: none;
}

.theme-option {
  width: 100%;
  padding: 11px 12px;
  border: 0;
  border-radius: 13px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  text-align: left;
  font-weight: 850;
}

.theme-option.active,
.theme-option:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 292px;
  gap: 18px;
  align-items: start;
}

.panel,
.promo-panel,
.question-card,
.result-card,
.rules-card,
.review-card {
  border: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  border-radius: 28px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--surface) 96%, white 4%), var(--surface)),
    var(--surface);
  box-shadow: 0 20px 48px var(--shadow);
}

.panel {
  padding: clamp(14px, 3.2vw, 24px);
}

.ticket-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  grid-auto-rows: auto;
  gap: 8px;
  align-content: start;
  align-items: start;
}

.ticket-cell {
  position: relative;
  align-self: start;
  width: 100%;
  min-height: 0;
  aspect-ratio: 1;
  padding: 7px 6px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 17px;
  background: color-mix(in srgb, var(--surface-alt) 86%, transparent);
  color: var(--text);
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 8%, transparent);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.ticket-cell:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--primary) 66%, var(--line));
}

.ticket-cell strong {
  display: block;
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
}

.ticket-cell small {
  position: absolute;
  right: 6px;
  bottom: 5px;
  display: block;
  margin-top: 0;
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 850;
}

.ticket-cell.done {
  background: color-mix(in srgb, var(--green-soft) 68%, var(--surface));
  border-color: color-mix(in srgb, var(--green) 58%, var(--line));
}

.ticket-cell.error {
  background: color-mix(in srgb, var(--rose-soft) 62%, var(--surface));
  border-color: color-mix(in srgb, var(--rose) 58%, var(--line));
}

.home-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.home-actions .ghost-button:last-child {
  grid-column: 1 / -1;
}

.primary-button,
.ghost-button,
.pill-button {
  min-height: 52px;
  padding: 0 18px;
  border-radius: 18px;
  font-weight: 950;
  transition: transform 160ms ease, filter 160ms ease, background 160ms ease;
}

.primary-button {
  background: linear-gradient(135deg, var(--primary-strong), var(--violet));
  color: #061112;
}

body[data-theme="light"] .primary-button {
  color: white;
}

.ghost-button,
.pill-button {
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  background: color-mix(in srgb, var(--surface-alt) 82%, transparent);
  color: var(--text);
}

.primary-button:hover,
.ghost-button:hover,
.pill-button:hover,
.answer-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.promo-panel {
  overflow: hidden;
  padding: 18px;
  background:
    radial-gradient(circle at 84% 12%, color-mix(in srgb, var(--primary) 26%, transparent), transparent 8rem),
    linear-gradient(145deg, color-mix(in srgb, var(--primary-soft) 58%, var(--surface)), var(--surface));
}

.promo-panel h3,
.panel h3,
.rules-card h3,
.review-card h3 {
  margin: 0;
  color: var(--text);
  font-size: 20px;
  font-weight: 950;
  line-height: 1.15;
}

.promo-panel p,
.panel-copy,
.rules-card p,
.review-card p {
  margin: 9px 0 0;
  color: var(--text-soft);
  font-weight: 650;
  line-height: 1.42;
}

.download-button {
  width: 100%;
  margin-top: 16px;
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.mini-stat {
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--line) 68%, transparent);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface-alt) 74%, transparent);
}

.mini-stat strong {
  display: block;
  color: var(--primary);
  font-size: 21px;
  font-weight: 950;
}

.mini-stat span {
  color: var(--text-faint);
  font-size: 12px;
  font-weight: 850;
}

.screen-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.quiz-screen {
  width: min(760px, 100%);
  margin: 0 auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
}

.quiz-top-panel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
  padding: 8px;
  border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  border-radius: 26px;
  background: var(--glass);
  box-shadow: 0 18px 42px var(--shadow);
}

.quiz-top-text {
  min-width: 0;
}

.quiz-top-text h1 {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  font-size: clamp(20px, 4.8vw, 30px);
  font-weight: 950;
  line-height: 1.08;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.quiz-top-text p {
  margin: 2px 0 0;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 750;
}

.quiz-toolbar {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.round-tool {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 0;
  border-radius: 17px;
  background: var(--primary-soft);
  color: var(--primary);
  cursor: pointer;
  font-size: 22px;
  font-weight: 950;
}

.round-tool:disabled {
  cursor: default;
  opacity: 0.42;
}

.screen-title {
  min-width: 0;
}

.screen-actions {
  display: flex;
  gap: 9px;
}

.icon-button {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 21px;
  font-weight: 950;
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-alt) 84%, transparent);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 900;
}

.timer-pill {
  color: var(--amber);
  background: color-mix(in srgb, var(--amber-soft) 80%, transparent);
}

.stepper {
  display: flex;
  gap: 7px;
  margin: 0 -16px 14px;
  overflow-x: auto;
  padding: 0 16px 4px;
  overscroll-behavior-x: contain;
  scroll-anchor: none;
  scrollbar-width: none;
  touch-action: pan-x;
}

.stepper::-webkit-scrollbar {
  display: none;
}

.step-dot {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-alt);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 900;
}

.step-dot.current {
  background: var(--primary);
  color: #041313;
  border-color: var(--primary);
}

.step-dot.answered:not(.current) {
  background: color-mix(in srgb, var(--primary-soft) 72%, var(--surface-alt));
  color: var(--text);
  border-color: color-mix(in srgb, var(--primary) 34%, var(--line));
}

.step-dot.right {
  background: color-mix(in srgb, var(--green-soft) 82%, var(--surface));
  color: var(--green);
  border-color: color-mix(in srgb, var(--green) 64%, var(--line));
}

.step-dot.wrong {
  background: color-mix(in srgb, var(--rose-soft) 82%, var(--surface));
  color: var(--rose);
  border-color: color-mix(in srgb, var(--rose) 64%, var(--line));
}

.question-card {
  overflow: hidden;
  border-radius: 30px;
}

.question-image {
  width: 100%;
  max-height: min(34vh, 310px);
  object-fit: contain;
  background: #f4f6f6;
  border-bottom: 1px solid var(--line);
}

.question-body {
  padding: clamp(14px, 3.4vw, 22px);
}

.topic-chip {
  display: inline-flex;
  max-width: 100%;
  margin-bottom: 12px;
  padding: 7px 10px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--primary-soft) 82%, transparent);
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
}

.question-text {
  margin: 0;
  color: var(--text);
  font-size: clamp(18px, 4.4vw, 25px);
  font-weight: 950;
  line-height: 1.24;
}

.answers {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.answer-button {
  width: 100%;
  min-height: 68px;
  padding: 13px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 20px;
  background: color-mix(in srgb, var(--surface-alt) 72%, transparent);
  color: var(--text);
  text-align: left;
}

.answer-content {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: center;
}

.answer-letter {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 14px;
  color: var(--text-faint);
  font-weight: 950;
}

.answer-text {
  font-weight: 850;
  line-height: 1.3;
}

.answer-button.correct {
  border-color: var(--green);
  background: color-mix(in srgb, var(--green-soft) 82%, var(--surface));
  color: var(--green);
}

.answer-button.wrong {
  border-color: var(--rose);
  background: color-mix(in srgb, var(--rose-soft) 82%, var(--surface));
  color: var(--rose);
}

.answer-button.exam-selected {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary-soft) 82%, var(--surface));
  color: var(--primary);
}

.answer-button.dimmed {
  opacity: 0.72;
}

.side-panel {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--glass);
  box-shadow: 0 18px 40px var(--shadow);
}

.side-panel h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 950;
}

.side-panel p {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 650;
  line-height: 1.38;
}

.bottom-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.bottom-actions > * {
  flex: 1;
}

.result-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  align-items: start;
}

.result-card {
  padding: clamp(18px, 4vw, 28px);
}

.result-title {
  font-size: clamp(28px, 6vw, 48px);
}

.result-title.pass {
  color: var(--green);
}

.result-title.fail {
  color: var(--rose);
}

.score-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.score-box {
  min-height: 86px;
  padding: 14px;
  border-radius: 20px;
  background: var(--surface-alt);
}

.score-box strong {
  display: block;
  color: var(--primary);
  font-size: 30px;
  font-weight: 950;
}

.score-box span {
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 850;
}

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

.review-card {
  overflow: hidden;
}

.review-card .question-image {
  max-height: 250px;
}

.review-body {
  padding: 16px;
}

.explain {
  margin-top: 12px;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--primary-soft) 65%, transparent);
  color: var(--text);
  font-weight: 650;
  line-height: 1.42;
}

.rules-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 18px;
}

.rules-search {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface);
  color: var(--text);
  font-weight: 750;
}

.rules-list {
  display: grid;
  gap: 12px;
}

.rules-card {
  padding: clamp(15px, 2.6vw, 22px);
}

.rule-card-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.rule-point {
  display: inline-flex;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 950;
}

.rule-category {
  color: var(--text-faint);
  font-size: 12px;
  font-weight: 850;
}

.rules-paragraphs {
  display: grid;
  gap: 9px;
  margin-top: 12px;
}

.rules-paragraphs p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.48;
}

.rules-meta {
  display: grid;
  gap: 2px;
  margin-top: 14px;
  padding: 12px;
  border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-alt) 72%, transparent);
}

.rules-meta strong {
  color: var(--primary);
  font-size: 22px;
  font-weight: 950;
}

.rules-meta span,
.rules-warning {
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 800;
}

.source-link {
  display: block;
  margin-top: 12px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 850;
  text-decoration: none;
}

.source-link:hover {
  text-decoration: underline;
}

.empty {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: 24px;
  color: var(--text-soft);
  text-align: center;
  font-weight: 800;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(0, 0, 0, 0.46);
}

.modal {
  width: min(420px, 100%);
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
}

.modal h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 950;
}

.modal p {
  margin: 10px 0 0;
  color: var(--text-soft);
  font-weight: 650;
  line-height: 1.42;
}

.modal-actions {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .home-layout,
  .result-grid,
  .rules-layout {
    grid-template-columns: 1fr;
  }

  .ticket-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .home-layout aside {
    display: none;
  }
}

@media (max-width: 560px) {
  .app-shell {
    padding: 14px 14px 34px;
  }

  .topbar,
  .screen-head {
    align-items: flex-start;
  }

  .topbar {
    margin-bottom: 14px;
  }

  .brand h1 {
    font-size: 28px;
  }

  .subtitle {
    max-width: 230px;
    font-size: 14px;
    line-height: 1.32;
  }

  .theme-button {
    min-width: 112px;
  }

  .ticket-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 6px;
  }

  .ticket-cell {
    min-height: 0;
    border-radius: 13px;
  }

  .ticket-cell strong {
    font-size: 15px;
  }

  .ticket-cell small {
    right: 4px;
    bottom: 3px;
    font-size: 8px;
  }

  .home-actions {
    grid-template-columns: 1fr;
  }

  .home-actions .ghost-button:last-child {
    grid-column: auto;
  }

  .quiz-top-panel {
    gap: 8px;
    border-radius: 24px;
  }

  .round-tool {
    width: 42px;
    height: 42px;
    border-radius: 16px;
  }

  .score-row {
    grid-template-columns: 1fr;
  }

  .bottom-actions {
    flex-direction: column;
  }
}