:root {
  --bg: #f7f1e4;
  --panel: rgba(255, 251, 244, 0.82);
  --panel-strong: rgba(255, 251, 244, 0.94);
  --line: rgba(49, 37, 28, 0.12);
  --ink: #1f1a17;
  --muted: #5d5149;
  --accent: #bf5c39;
  --accent-deep: #8f391e;
  --accent-soft: #f1d6bc;
  --teal: #1a6f69;
  --teal-soft: #d6ece9;
  --gold: #d3a94c;
  --shadow: 0 22px 64px rgba(69, 45, 19, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --space-xs: 0.5rem;
  --space-sm: 0.875rem;
  --space-md: 1.25rem;
  --space-lg: 1.75rem;
  --space-xl: 2.5rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(191, 92, 57, 0.15), transparent 28%),
    radial-gradient(circle at top right, rgba(26, 111, 105, 0.14), transparent 30%),
    linear-gradient(180deg, #f8f2e8 0%, #f3ead7 100%);
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.45;
  padding: max(16px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
}

button,
input,
select {
  font: inherit;
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(28px);
  opacity: 0.7;
}

.orb-a {
  width: 22rem;
  height: 22rem;
  background: rgba(191, 92, 57, 0.18);
  top: -6rem;
  right: -5rem;
}

.orb-b {
  width: 18rem;
  height: 18rem;
  background: rgba(26, 111, 105, 0.14);
  bottom: 8rem;
  left: -4rem;
}

.grid-wash {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(49, 37, 28, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 37, 28, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 85%);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
  animation: rise-in 600ms ease both;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
}

.page-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  background: rgba(31, 26, 23, 0.05);
  color: var(--muted);
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.page-nav-link:hover {
  transform: translateY(-1px);
}

.page-nav-link.is-current {
  background: var(--ink);
  color: #fffaf4;
  box-shadow: 0 12px 24px rgba(31, 26, 23, 0.14);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  display: grid;
  gap: 24px;
  padding: clamp(22px, 4vw, 36px);
}

.eyebrow,
.section-kicker,
.sidebar-kicker,
.anchor-label,
.control-label {
  margin: 0 0 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  color: var(--accent-deep);
}

.hero h1,
.panel-heading h2,
.rule-card h2,
.coach-card h2 {
  margin: 0;
  line-height: 1;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.35rem, 8vw, 4.9rem);
  max-width: 12ch;
}

.hero h1 span {
  display: block;
  margin-top: 0.45rem;
  color: var(--teal);
  font-family: "Literata", serif;
  font-size: 0.62em;
  line-height: 1.15;
}

.lede {
  margin: 1rem 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-controls {
  display: grid;
  gap: 14px;
  align-content: start;
}

.control-card {
  background: var(--panel-strong);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(49, 37, 28, 0.08);
  padding: 16px;
}

.metrics-card {
  display: grid;
  gap: 0.65rem;
}

.metric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
}

.metric-row strong {
  color: var(--ink);
  font-size: 1.05rem;
}

.microcopy,
.sub-prompt,
.choice-nudge,
.sidebar-helper,
.hint-text,
.anchor-tip,
.feedback-body,
.rule-card p,
.coach-card p {
  color: var(--muted);
}

.choice-nudge,
.sidebar-helper {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
}

.choice-nudge {
  font-weight: 600;
}

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  background: rgba(31, 26, 23, 0.05);
  border-radius: 999px;
  padding: 6px;
}

.segment {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  min-height: 44px;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.segment.is-active {
  background: var(--accent);
  color: #fffaf4;
  box-shadow: 0 10px 24px rgba(191, 92, 57, 0.24);
}

.segment:active,
.primary-button:active,
.ghost-button:active,
.icon-button:active,
.option-button:active {
  transform: translateY(1px) scale(0.99);
}

.learn-grid {
  display: grid;
  gap: 18px;
}

.rule-card,
.coach-card,
.practice-panel,
.anchor-panel {
  padding: clamp(20px, 4vw, 28px);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 1rem 0 1.2rem;
}

.form-chip {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  min-width: 94px;
  padding: 0.8rem 0.9rem;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(49, 37, 28, 0.08);
  border-radius: var(--radius-md);
}

.form-chip strong {
  font-family: "Literata", serif;
  font-size: 1.22rem;
}

.form-chip span {
  color: var(--muted);
  font-size: 0.78rem;
}

.rule-list,
.loop-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.rule-list li,
.loop-list li {
  margin: 0.6rem 0;
}

.note-banner {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(211, 169, 76, 0.14), rgba(191, 92, 57, 0.12));
  border: 1px solid rgba(191, 92, 57, 0.12);
}

.panel-heading,
.action-row,
.hint-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.prompt-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 1rem;
}

.meta-stack {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.phase-status {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem;
}

.status-pill,
.mode-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.84rem;
}

.status-pill {
  background: rgba(26, 111, 105, 0.12);
  color: var(--teal);
}

.mode-badge {
  background: rgba(191, 92, 57, 0.12);
  color: var(--accent-deep);
}

.phase-progress {
  color: var(--muted);
}

.practice-grid {
  display: grid;
  gap: 18px;
  margin-top: 1.5rem;
}

.prompt-card,
.sidebar-card,
.anchor-card {
  background: var(--panel-strong);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(49, 37, 28, 0.08);
  padding: 18px;
}

.prompt-card {
  display: grid;
  gap: 1rem;
}

.prompt-label {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.7rem;
  color: var(--accent-deep);
}

.prompt-text {
  font-family: "Literata", serif;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.25;
}

.inline-ru,
.anchor-quote {
  font-family: "Literata", serif;
}

.prompt-text .blank {
  display: inline-block;
  min-width: 4.8ch;
  border-bottom: 3px solid rgba(31, 26, 23, 0.16);
  text-align: center;
  padding-bottom: 0.08rem;
}

.feedback-card {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: rgba(31, 26, 23, 0.04);
  border: 1px solid rgba(49, 37, 28, 0.08);
}

.feedback-card.is-hidden,
.action-row.is-hidden {
  display: none;
}

.feedback-card.is-correct {
  background: rgba(26, 111, 105, 0.09);
  border-color: rgba(26, 111, 105, 0.14);
}

.feedback-card.is-wrong {
  background: rgba(191, 92, 57, 0.09);
  border-color: rgba(191, 92, 57, 0.14);
}

.feedback-title {
  margin: 0 0 0.45rem;
  font-weight: 700;
}

.action-row {
  justify-content: flex-end;
}

.sidebar-stack,
.anchor-grid {
  display: grid;
  gap: 18px;
}

.mastery-grid,
.weak-spot-list,
.options-grid {
  display: grid;
  gap: 10px;
}

.practice-options {
  display: grid;
  gap: 0.55rem;
}

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

.mastery-tile {
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(31, 26, 23, 0.04);
  border: 1px solid rgba(49, 37, 28, 0.08);
}

.mastery-tile strong {
  display: block;
  font-family: "Literata", serif;
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.mastery-track {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: rgba(31, 26, 23, 0.08);
  overflow: hidden;
  margin: 0.55rem 0 0.35rem;
}

.mastery-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--gold), var(--teal));
  border-radius: inherit;
  transition: width 220ms ease;
}

.weak-spot-item {
  display: grid;
  gap: 0.25rem;
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(31, 26, 23, 0.04);
  border: 1px solid rgba(49, 37, 28, 0.08);
}

.weak-spot-item strong {
  font-family: "Literata", serif;
  font-size: 1.1rem;
}

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

.option-button,
.primary-button,
.ghost-button,
.icon-button {
  border: 0;
  min-height: 48px;
  border-radius: 16px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.option-button {
  padding: 0.95rem 0.9rem;
  background: #fffaf2;
  border: 1px solid rgba(49, 37, 28, 0.08);
  color: var(--ink);
  font-family: "Literata", serif;
  font-size: 1.18rem;
  box-shadow: 0 8px 18px rgba(49, 37, 28, 0.06);
}

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

.option-button.is-selected {
  outline: 2px solid rgba(191, 92, 57, 0.32);
}

.option-button.is-correct {
  background: var(--teal-soft);
  color: #0f403d;
}

.option-button.is-wrong {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.option-button:disabled {
  cursor: default;
}

.primary-button {
  background: var(--ink);
  color: #fffaf4;
  padding: 0.95rem 1.2rem;
  box-shadow: 0 12px 24px rgba(31, 26, 23, 0.18);
}

.ghost-button,
.icon-button {
  background: rgba(31, 26, 23, 0.05);
  color: var(--ink);
  padding: 0.85rem 1rem;
}

.ghost-button:disabled,
.primary-button:disabled,
.icon-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.anchor-grid {
  margin-top: 1.3rem;
}

.anchor-card {
  display: grid;
  gap: 0.65rem;
}

.anchor-quote {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.35;
}

.settings-panel {
  overflow: hidden;
  padding: 0;
}

.settings-details {
  background: transparent;
}

.settings-summary-row {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 18px 22px;
  cursor: pointer;
}

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

.settings-summary-row h2 {
  margin: 0;
  font-size: 1.2rem;
}

.settings-summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(31, 26, 23, 0.05);
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.settings-body {
  display: grid;
  gap: 0.8rem;
  padding: 0 22px 22px;
}

.settings-note {
  margin: 0;
  color: var(--muted);
}

.settings-label {
  font-size: 0.9rem;
  font-weight: 700;
}

.settings-select {
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid rgba(49, 37, 28, 0.12);
  background: rgba(255, 251, 244, 0.94);
  color: var(--ink);
  padding: 0.75rem 0.9rem;
}

@media (min-width: 720px) {
  body {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero {
    grid-template-columns: 1.35fr 0.9fr;
    align-items: end;
  }

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

  .hero-controls {
    grid-template-columns: 1fr;
  }

  .practice-grid {
    grid-template-columns: 1.28fr 0.92fr;
    align-items: start;
  }

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

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

  .practice-options-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .settings-body {
    grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.8fr);
    align-items: end;
  }

  .settings-label {
    grid-column: 2;
  }

  .settings-select {
    grid-column: 2;
    grid-row: 2;
  }
}

@media (max-width: 719px) {
  .panel-heading,
  .hint-row,
  .action-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .phase-status {
    justify-content: flex-start;
  }

  .hero h1 {
    max-width: none;
  }

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

  .prompt-card,
  .sidebar-card,
  .anchor-card {
    padding: 16px;
  }

  .prompt-text {
    font-size: clamp(1.55rem, 9vw, 2.1rem);
  }

  .sub-prompt,
  .choice-nudge {
    margin-top: 0.35rem;
  }

  .settings-summary-row {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
  }

  .app-shell,
  .segment,
  .primary-button,
  .ghost-button,
  .icon-button,
  .option-button,
  .mastery-fill {
    animation: none;
    transition: none;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}