:root {
  --bg: #f7f2eb;
  --panel: rgba(255, 251, 245, 0.78);
  --panel-strong: rgba(255, 251, 245, 0.94);
  --panel-soft: rgba(255, 255, 255, 0.5);
  --line: rgba(44, 34, 26, 0.12);
  --line-strong: rgba(44, 34, 26, 0.18);
  --ink: #201915;
  --muted: #635750;
  --accent: #cd4d4d;
  --accent-deep: #8c2f39;
  --sky: #4d7fd4;
  --leaf: #4d9154;
  --amber: #d7a634;
  --lavender: #8f6ad5;
  --shadow: 0 26px 70px rgba(88, 59, 34, 0.12);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 13px;
  --space-xs: 0.45rem;
  --space-sm: 0.8rem;
  --space-md: 1.2rem;
  --space-lg: 1.7rem;
  --space-xl: 2.5rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  line-height: 1.5;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), transparent 24%),
    linear-gradient(180deg, #f8f4ee 0%, #f2e8dc 100%);
  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;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.wash {
  position: absolute;
  border-radius: 50%;
  filter: blur(44px);
  opacity: 0.55;
}

.wash-red {
  width: 24rem;
  height: 24rem;
  top: -8rem;
  left: -6rem;
  background: rgba(205, 77, 77, 0.28);
}

.wash-blue {
  width: 26rem;
  height: 26rem;
  right: -7rem;
  top: 12rem;
  background: rgba(77, 127, 212, 0.24);
}

.wash-yellow {
  width: 22rem;
  height: 22rem;
  left: 28%;
  bottom: -7rem;
  background: rgba(215, 166, 52, 0.22);
}

.grain-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(44, 34, 26, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 34, 26, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 88%);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 18px;
  animation: rise-in 650ms 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(32, 25, 21, 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(32, 25, 21, 0.14);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  gap: 20px;
  padding: clamp(22px, 4vw, 36px);
}

.hero-copy h1,
.panel-heading h2,
.rule-card h2,
.coach-card h2,
.prompt-title {
  margin: 0;
  font-family: "Fraunces", serif;
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(2.55rem, 8vw, 5.35rem);
  max-width: 10ch;
}

.hero-copy h1 span {
  display: block;
  margin-top: 0.45rem;
  color: var(--sky);
  font-size: 0.6em;
  line-height: 1.12;
}

.eyebrow,
.section-kicker,
.sidebar-kicker,
.control-label,
.prompt-label {
  margin: 0 0 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-deep);
}

.lede,
.microcopy,
.sub-prompt,
.choice-nudge,
.hint-text,
.feedback-body,
.rule-card p,
.coach-card p,
.settings-note,
.phase-progress {
  color: var(--muted);
}

.lede {
  margin: 1rem 0 0;
  max-width: 64ch;
  font-size: 1.02rem;
}

.hero-side {
  display: grid;
  gap: 14px;
}

.control-card,
.prompt-card,
.sidebar-card,
.atlas-card {
  background: var(--panel-strong);
  border: 1px solid rgba(44, 34, 26, 0.08);
  border-radius: var(--radius-lg);
}

.control-card {
  padding: 16px;
}

.metrics-card {
  display: grid;
  gap: 0.75rem;
}

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

.metric-row strong {
  color: var(--ink);
  font-size: 1.03rem;
}

.spectrum-card {
  display: grid;
  gap: 0.85rem;
}

.spectrum-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.spectrum-chip {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 0.65rem 0.7rem;
  border-radius: 16px;
  background: rgba(32, 25, 21, 0.04);
  border: 1px solid rgba(44, 34, 26, 0.08);
}

.spectrum-swatch,
.atlas-swatch,
.swatch-chip,
.swatch-dot,
.option-swatch-surface,
.swatch-surface {
  background:
    radial-gradient(circle at 25% 20%, rgba(255, 255, 255, 0.52), transparent 32%),
    linear-gradient(145deg, var(--swatch), var(--swatch-deep));
}

.spectrum-swatch {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.spectrum-chip strong,
.mastery-header strong,
.atlas-copy h3,
.feedback-title,
.example-phrase,
.inline-ru {
  font-family: "Fraunces", serif;
}

.spectrum-chip strong {
  display: block;
  font-size: 1rem;
}

.spectrum-chip span {
  color: var(--muted);
  font-size: 0.82rem;
}

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

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

.note-stack,
.ending-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 1rem;
}

.note-chip,
.ending-pill,
.mode-chip,
.form-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(44, 34, 26, 0.08);
  background: rgba(32, 25, 21, 0.04);
}

.ending-pill {
  font-weight: 700;
}

.loop-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.loop-list li {
  margin: 0.65rem 0;
}

.note-banner {
  margin-top: 1.15rem;
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(205, 77, 77, 0.12), rgba(77, 127, 212, 0.12));
  border: 1px solid rgba(44, 34, 26, 0.08);
}

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

.phase-status,
.meta-stack,
.mode-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.toolbar-actions {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem;
}

.status-pill,
.mode-badge,
.timer-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0.42rem 0.8rem;
  border-radius: 999px;
  font-size: 0.84rem;
}

.status-pill {
  background: rgba(77, 145, 84, 0.12);
  color: var(--leaf);
}

.mode-badge {
  background: rgba(205, 77, 77, 0.12);
  color: var(--accent-deep);
}

.timer-pill {
  background: rgba(77, 127, 212, 0.1);
  color: var(--sky);
  font-weight: 700;
}

.timer-pill.is-paused {
  background: rgba(215, 166, 52, 0.18);
  color: #8a6411;
}

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

.prompt-card,
.sidebar-card {
  padding: 18px;
}

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

.prompt-body {
  display: grid;
  gap: 0.9rem;
}

.prompt-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
}

.prompt-stage {
  display: grid;
  gap: 0.95rem;
}

.swatch-stage,
.agreement-stage,
.audio-stage {
  padding: 18px;
  border-radius: 24px;
  border: 1px solid rgba(44, 34, 26, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.44), rgba(255, 255, 255, 0.18)),
    rgba(32, 25, 21, 0.02);
}

.swatch-stage,
.audio-stage {
  display: grid;
  gap: 0.95rem;
}

.swatch-surface {
  width: 100%;
  min-height: clamp(180px, 40vw, 250px);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.36),
    0 18px 30px rgba(32, 25, 21, 0.08);
}

.swatch-caption,
.stage-note {
  color: var(--muted);
  font-size: 0.95rem;
}

.agreement-stage {
  display: grid;
  gap: 1rem;
}

.agreement-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.swatch-chip {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.48);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

.sentence-blank {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  line-height: 1.08;
}

.sentence-blank .blank {
  display: inline-block;
  min-width: 3.8ch;
  padding-bottom: 0.06rem;
  border-bottom: 3px solid rgba(32, 25, 21, 0.16);
  text-align: center;
}

.stage-meta {
  margin: 0.15rem 0 0;
  color: var(--muted);
}

.audio-stage {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
}

.audio-disc {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.62) 0 20%, transparent 21%),
    radial-gradient(circle at center, rgba(77, 127, 212, 0.2) 22% 44%, transparent 45%),
    radial-gradient(circle at center, rgba(205, 77, 77, 0.18) 46% 70%, transparent 71%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(77, 127, 212, 0.2));
  border: 1px solid rgba(44, 34, 26, 0.08);
  box-shadow: 0 18px 30px rgba(77, 127, 212, 0.14);
}

.choice-nudge {
  margin: 0;
  font-weight: 700;
}

.practice-options {
  display: grid;
  gap: 0.6rem;
}

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

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

.options-grid[data-choice-type="swatch"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.option-button,
.primary-button,
.ghost-button,
.icon-button,
.settings-select {
  min-height: 48px;
  border-radius: 16px;
}

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

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

.option-text {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  padding: 0.9rem;
  text-align: left;
  background: #fffaf4;
  border: 1px solid rgba(44, 34, 26, 0.08);
  box-shadow: 0 10px 20px rgba(44, 34, 26, 0.05);
}

.option-text strong {
  font-family: "Fraunces", serif;
  font-size: 1.15rem;
}

.option-text span {
  color: var(--muted);
  font-size: 0.82rem;
}

.option-swatch {
  display: grid;
  gap: 0.65rem;
  width: 100%;
  padding: 10px;
  background: rgba(255, 251, 245, 0.92);
  border: 1px solid rgba(44, 34, 26, 0.08);
  box-shadow: 0 12px 24px rgba(44, 34, 26, 0.05);
}

.option-swatch-surface {
  width: 100%;
  min-height: 116px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.option-swatch-label {
  min-height: 1.1rem;
  font-size: 0.84rem;
  color: var(--muted);
  text-align: center;
}

.option-button.is-selected {
  outline: 2px solid rgba(77, 127, 212, 0.3);
}

.option-button.is-correct {
  background: rgba(77, 145, 84, 0.15);
  color: #173a1b;
}

.option-button.is-wrong {
  background: rgba(205, 77, 77, 0.15);
  color: var(--accent-deep);
}

.option-button:disabled,
.primary-button:disabled,
.ghost-button:disabled,
.icon-button:disabled {
  cursor: default;
  opacity: 0.48;
  transform: none;
}

.primary-button {
  padding: 0.92rem 1.2rem;
  background: var(--ink);
  color: #fffaf4;
  box-shadow: 0 14px 26px rgba(32, 25, 21, 0.18);
}

.ghost-button,
.icon-button {
  padding: 0.82rem 1rem;
  background: rgba(32, 25, 21, 0.05);
  color: var(--ink);
}

.pause-button {
  background: rgba(215, 166, 52, 0.14);
  color: #8a6411;
}

.pause-button.is-active {
  background: rgba(77, 145, 84, 0.14);
  color: var(--leaf);
}

.feedback-card {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: rgba(32, 25, 21, 0.04);
  border: 1px solid rgba(44, 34, 26, 0.08);
}

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

.feedback-card.is-correct {
  background: rgba(77, 145, 84, 0.1);
  border-color: rgba(77, 145, 84, 0.16);
}

.feedback-card.is-wrong {
  background: rgba(205, 77, 77, 0.1);
  border-color: rgba(205, 77, 77, 0.16);
}

.feedback-title {
  margin: 0 0 0.35rem;
  font-size: 1.12rem;
}

.feedback-body {
  margin: 0;
}

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

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

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

.mastery-tile {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(32, 25, 21, 0.04);
  border: 1px solid rgba(44, 34, 26, 0.08);
}

.mastery-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.swatch-dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  align-self: start;
  margin-top: 0.25rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.mastery-header strong {
  display: block;
  font-size: 1.12rem;
}

.mastery-header span,
.mastery-summary,
.weak-spot-item span,
.example-gloss {
  color: var(--muted);
}

.mastery-track {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(32, 25, 21, 0.08);
}

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

.mastery-summary {
  font-size: 0.84rem;
}

.mode-chip {
  min-height: 28px;
  padding: 0.3rem 0.55rem;
  font-size: 0.76rem;
  color: var(--muted);
}

.weak-spot-item {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: rgba(32, 25, 21, 0.04);
  border: 1px solid rgba(44, 34, 26, 0.08);
}

.weak-spot-item strong {
  font-family: "Fraunces", serif;
  font-size: 1.08rem;
}

.atlas-grid {
  margin-top: 1.4rem;
}

.atlas-card {
  display: grid;
  gap: 0.95rem;
  padding: 18px;
}

.atlas-head {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.atlas-swatch {
  width: 76px;
  height: 76px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.48);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

.atlas-copy h3 {
  margin: 0;
  font-size: 1.28rem;
}

.atlas-copy p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.forms-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.form-pill {
  font-family: "Fraunces", serif;
  font-size: 0.96rem;
}

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

.example-line {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 8px;
  border-top: 1px solid rgba(44, 34, 26, 0.08);
}

.example-line:first-child {
  padding-top: 0;
  border-top: 0;
}

.example-phrase {
  font-size: 1rem;
}

.example-gloss {
  text-align: right;
  font-size: 0.86rem;
}

.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-family: "Fraunces", serif;
  font-size: 1.25rem;
}

.settings-summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(32, 25, 21, 0.05);
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

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

.settings-label {
  font-size: 0.9rem;
  font-weight: 800;
}

.settings-select {
  border: 1px solid rgba(44, 34, 26, 0.12);
  background: rgba(255, 251, 245, 0.94);
  color: var(--ink);
  padding: 0.75rem 0.9rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

  .hero {
    grid-template-columns: 1.22fr 0.9fr;
    align-items: end;
  }

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

  .practice-grid {
    grid-template-columns: 1.25fr 0.95fr;
    align-items: start;
  }

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

  .options-grid[data-choice-type="swatch"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .settings-body {
    grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.9fr);
    align-items: end;
  }

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

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

@media (min-width: 980px) {
  .spectrum-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 719px) {
  .panel-heading,
  .prompt-toolbar,
  .hint-row,
  .action-row,
  .phase-status,
  .audio-stage,
  .example-line {
    flex-direction: column;
    align-items: flex-start;
  }

  .audio-stage {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: none;
  }

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

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

  .swatch-chip {
    width: 100%;
    max-width: 92px;
  }

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

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

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

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