:root {
  color-scheme: light;
  --bg: var(--tg-theme-bg-color, #f5efe5);
  --text: var(--tg-theme-text-color, #1d2424);
  --muted: var(--tg-theme-hint-color, #68716f);
  --surface: var(--tg-theme-secondary-bg-color, #fffaf2);
  --surface-strong: #ffffff;
  --control-bg: color-mix(in srgb, var(--bg) 10%, var(--surface-strong) 90%);
  --border: rgba(36, 45, 43, 0.12);
  --accent: #1f756f;
  --accent-text: #ffffff;
  --danger: #9d3a2f;
  --warning: #b56a2b;
  --shadow: 0 16px 42px rgba(41, 39, 31, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: var(--tg-theme-bg-color, #10161d);
  --text: var(--tg-theme-text-color, #f3eee4);
  --muted: var(--tg-theme-hint-color, #a6b0b0);
  --surface: #17222c;
  --surface-strong: #202d38;
  --control-bg: #202d38;
  --border: rgba(243, 238, 228, 0.14);
  --accent: #72d2c7;
  --accent-text: #071514;
  --danger: #ff8a7a;
  --warning: #e3bd73;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.36);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #10161d;
    --text: #f3eee4;
    --muted: #a6b0b0;
    --surface: #17222c;
    --surface-strong: #202d38;
    --control-bg: #202d38;
    --border: rgba(243, 238, 228, 0.14);
    --accent: #72d2c7;
    --accent-text: #071514;
    --danger: #ff8a7a;
    --warning: #e3bd73;
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.36);
  }
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  background:
    linear-gradient(90deg, rgba(31, 117, 111, 0.08) 0 1px, transparent 1px 72px),
    linear-gradient(180deg, rgba(157, 58, 47, 0.06) 0 1px, transparent 1px 72px),
    var(--bg);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

button {
  font: inherit;
  letter-spacing: 0;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(31, 117, 111, 0.32);
  outline-offset: 3px;
}

.app-shell {
  width: min(100%, 860px);
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: calc(16px + env(safe-area-inset-top)) 16px calc(28px + env(safe-area-inset-bottom));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  gap: 10px;
  align-items: center;
  margin: -16px -16px 16px;
  padding: calc(14px + env(safe-area-inset-top)) 16px 12px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.topbar h1 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 760;
}

.eyebrow,
.story-card__kicker,
.meta,
.option-index {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 680;
  text-transform: uppercase;
}

.icon-button {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  color: var(--text);
  cursor: pointer;
}

.icon-button[hidden] {
  visibility: hidden;
}

.icon-button span {
  font-size: 1.35rem;
  line-height: 1;
}

.content {
  display: grid;
  gap: 16px;
}

.state-panel,
.profile-panel,
.achievements-panel,
.story-card,
.story-view,
.feedback-view,
.completion-view {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 94%, #ffffff 6%);
  box-shadow: var(--shadow);
}

.state-panel {
  display: grid;
  min-height: 220px;
  place-items: center;
  padding: 28px;
  text-align: center;
}

.state-panel p {
  margin: 0;
  color: var(--muted);
}

.loader {
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border: 3px solid rgba(31, 117, 111, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.library-head {
  display: grid;
  gap: 12px;
  align-items: start;
  padding: 4px 2px 0;
}

.library-head h2,
.profile-panel h2,
.achievements-panel h2,
.story-view h2,
.feedback-view h2,
.completion-view h2 {
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.12;
}

.library-head p,
.story-lead,
.feedback-copy,
.completion-copy {
  margin: 0;
  color: var(--muted);
}

.profile-panel {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.achievements-panel {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.profile-head {
  display: grid;
  gap: 12px;
}

.profile-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  border-block: 1px solid var(--border);
  padding-block: 12px;
}

.profile-metric {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.profile-metric span,
.profile-details dt,
.profile-metric small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 720;
  text-transform: uppercase;
}

.profile-metric strong {
  font-size: 1.42rem;
  line-height: 1.05;
}

.profile-metric small {
  font-size: 0.72rem;
  font-weight: 640;
}

.profile-details {
  display: grid;
  gap: 12px;
  margin: 0;
}

.profile-details > div {
  display: grid;
  gap: 5px;
}

.profile-details dd {
  margin: 0;
}

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

.topic-chip {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  border: 1px solid rgba(31, 117, 111, 0.24);
  border-radius: 999px;
  padding: 3px 9px;
  background: rgba(31, 117, 111, 0.08);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
}

.continue-summary {
  display: grid;
  gap: 10px;
  padding-top: 2px;
}

.continue-summary strong {
  display: block;
  margin-top: 3px;
}

.mini-progress {
  overflow: hidden;
  height: 7px;
  border-radius: 999px;
  background: rgba(31, 117, 111, 0.14);
}

.mini-progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.achievements-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
}

.achievements-head strong {
  color: var(--accent);
  font-size: 1.28rem;
  line-height: 1;
}

.achievement-list {
  display: grid;
  gap: 10px;
}

.achievement-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px 12px;
  align-items: center;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

.achievement-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.achievement-item:last-child {
  padding-bottom: 0;
}

.achievement-marker {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(31, 117, 111, 0.24);
  border-radius: 50%;
  background: rgba(31, 117, 111, 0.1);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.achievement-item.is-locked .achievement-marker {
  border-color: var(--border);
  background: var(--surface-strong);
  color: var(--muted);
}

.achievement-copy {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.achievement-copy strong {
  line-height: 1.2;
}

.achievement-copy span,
.achievement-meta span {
  color: var(--muted);
  font-size: 0.84rem;
}

.achievement-meta {
  display: grid;
  grid-column: 2;
  gap: 6px;
}

.achievement-progress {
  overflow: hidden;
  height: 7px;
  border-radius: 999px;
  background: rgba(31, 117, 111, 0.12);
}

.achievement-progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--warning));
}

.library-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.story-grid {
  display: grid;
  gap: 12px;
}

.story-card {
  display: grid;
  gap: 18px;
  padding: 16px;
}

.story-card.is-completed {
  border-color: rgba(31, 117, 111, 0.32);
  background: color-mix(in srgb, var(--surface) 90%, rgba(31, 117, 111, 0.1) 10%);
}

.story-card__status {
  display: inline-flex;
  width: max-content;
  max-width: 100%;
  min-height: 26px;
  align-items: center;
  margin-top: 8px;
  padding: 3px 9px;
  border: 1px solid rgba(31, 117, 111, 0.24);
  border-radius: 999px;
  background: rgba(31, 117, 111, 0.1);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 760;
}

.story-card h2 {
  margin: 4px 0 8px;
  font-size: 1.05rem;
  line-height: 1.22;
}

.story-card p:last-child {
  margin: 0;
  color: var(--muted);
}

.primary-button,
.secondary-button,
.option-button {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
}

.primary-button {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 760;
}

.secondary-button {
  background: var(--control-bg);
  color: var(--text);
  border-color: var(--border);
  font-weight: 700;
}

.share-button {
  min-width: 0;
  width: 100%;
  padding: 10px 14px;
  line-height: 1.25;
  white-space: normal;
}

.option-button {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 12px;
  background: color-mix(in srgb, var(--bg) 74%, var(--control-bg) 26%);
  color: var(--text);
  border-color: var(--border);
  text-align: left;
}

:root[data-theme="dark"] .option-button {
  background: var(--control-bg);
}

.primary-button:active,
.secondary-button:active,
.option-button:active {
  transform: translateY(1px);
}

.story-view,
.feedback-view,
.completion-view {
  overflow: hidden;
}

.story-banner {
  position: relative;
  display: grid;
  gap: 10px;
  min-height: 138px;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(31, 117, 111, 0.18), transparent 42%),
    linear-gradient(45deg, rgba(157, 58, 47, 0.14), transparent 48%),
    color-mix(in srgb, var(--surface) 88%, #d9c6a5 12%);
}

.story-banner::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: 14px;
  width: 94px;
  height: 58px;
  border: 1px solid rgba(36, 45, 43, 0.18);
  background:
    linear-gradient(90deg, transparent 0 20%, rgba(36, 45, 43, 0.12) 20% 21%, transparent 21% 50%, rgba(36, 45, 43, 0.12) 50% 51%, transparent 51%),
    linear-gradient(180deg, transparent 0 48%, rgba(157, 58, 47, 0.24) 48% 52%, transparent 52%),
    rgba(255, 255, 255, 0.32);
  opacity: 0.88;
  transform: rotate(-3deg);
}

.story-banner > * {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.story-body,
.feedback-body,
.completion-body {
  display: grid;
  gap: 16px;
  padding: 18px;
}

.intro-note {
  padding: 14px;
  border-left: 4px solid var(--warning);
  background: rgba(181, 106, 43, 0.08);
  color: var(--text);
}

.intro-note p,
.step-text p {
  margin: 0;
}

.progress-wrap {
  display: grid;
  gap: 8px;
}

.progress-line {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.progress-track {
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: rgba(31, 117, 111, 0.14);
}

.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--danger));
}

.question-block {
  display: grid;
  gap: 12px;
}

.question-block h3 {
  margin: 0;
  font-size: 1rem;
}

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

.option-index {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: rgba(31, 117, 111, 0.12);
  color: var(--accent);
}

:root[data-theme="dark"] .option-button .option-index {
  background: var(--accent);
  color: var(--accent-text);
}

.feedback-view.is-correct {
  border-color: rgba(31, 117, 111, 0.34);
}

.feedback-view.is-wrong {
  border-color: rgba(157, 58, 47, 0.34);
}

.feedback-mark {
  display: grid;
  gap: 6px;
  padding: 18px;
  background: var(--surface-strong);
  border-bottom: 1px solid var(--border);
}

.feedback-pill {
  width: max-content;
  max-width: 100%;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(31, 117, 111, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 760;
}

.is-wrong .feedback-pill {
  background: rgba(157, 58, 47, 0.12);
  color: var(--danger);
}

.fact-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.fact-list div {
  display: grid;
  gap: 3px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-strong);
}

.fact-list dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
}

.fact-list dd {
  margin: 0;
}

.new-achievements {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid rgba(181, 106, 43, 0.28);
  border-radius: 8px;
  background: rgba(181, 106, 43, 0.08);
}

.new-achievement-list {
  display: grid;
  gap: 8px;
}

.new-achievement-item {
  display: grid;
  gap: 3px;
}

.new-achievement-item strong {
  line-height: 1.2;
}

.new-achievement-item span {
  color: var(--muted);
  font-size: 0.9rem;
}

.source-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.source-list a {
  display: block;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.action-row {
  display: grid;
  gap: 10px;
}

.error-text {
  color: var(--danger);
  font-weight: 680;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 680px) {
  .app-shell {
    padding-inline: 24px;
  }

  .topbar {
    margin-inline: -24px;
    padding-inline: 24px;
  }

  .library-head {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .profile-head {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .library-actions {
    grid-template-columns: auto auto;
  }

  .story-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .story-card {
    grid-template-rows: 1fr auto;
  }

  .action-row {
    grid-template-columns: auto auto;
    justify-content: start;
  }

  .share-button {
    width: auto;
    max-width: 380px;
  }
}