:root {
  --ink: #111722;
  --ink-soft: #566072;
  --paper: #f7f2ea;
  --paper-strong: #fffdf8;
  --line: rgba(18, 28, 45, 0.12);
  --accent: #a61b29;
  --accent-deep: #7a0f1b;
  --accent-soft: rgba(166, 27, 41, 0.1);
  --gold: #e4b660;
  --teal: #0f6466;
  --shadow: 0 24px 48px rgba(17, 23, 34, 0.08);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(228, 182, 96, 0.32), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 100, 102, 0.18), transparent 30%),
    linear-gradient(180deg, #fbf8f1 0%, #f3ecdf 100%);
  min-height: 100vh;
}

button,
select,
input {
  font: inherit;
}

.page-shell {
  width: min(1120px, calc(100% - 24px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(166, 27, 41, 0.96), rgba(122, 15, 27, 0.9)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent);
  color: white;
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -40px -70px auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(228, 182, 96, 0.55), transparent 65%);
}

.hero__badge,
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero__eyebrow {
  margin: 16px 0 10px;
  color: rgba(255, 255, 255, 0.72);
}

.hero h1,
.panel h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  letter-spacing: 0.01em;
}

.hero h1 {
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  line-height: 0.98;
  max-width: 10ch;
}

.hero__lead {
  max-width: 44rem;
  margin: 16px 0 0;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.84);
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.status-card,
.panel,
.news-card,
.theme-card,
.flashcard,
.sentence-card,
.argument-card,
.dictation-card,
.mistake-card,
.speed-drill-card,
.framework-card {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.status-card {
  position: relative;
  z-index: 1;
  padding: 14px 16px;
  border-radius: 20px;
  color: var(--ink);
}

.status-card span {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.status-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1rem;
}

.dashboard,
.panel {
  padding: 22px;
  border-radius: var(--radius);
}

.dashboard {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
}

.dashboard p {
  margin: 8px 0 0;
  line-height: 1.7;
}

.module-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 20px 0 16px;
}

.module-tab {
  padding: 14px 12px;
  border: 1px solid rgba(166, 27, 41, 0.22);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font-weight: 600;
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.module-tab:hover,
.module-tab:focus-visible {
  transform: translateY(-1px);
}

.module-tab.is-active {
  background: var(--accent);
  color: white;
}

.module-section {
  display: none;
  gap: 16px;
}

.module-section.is-active {
  display: grid;
}

.section-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-copy {
  max-width: 32rem;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.stack {
  display: grid;
  gap: 14px;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.news-card,
.theme-card,
.flashcard,
.sentence-card,
.argument-card,
.quiz-card {
  padding: 18px;
  border-radius: 22px;
}

.news-card {
  display: grid;
  gap: 12px;
}

.news-card__meta,
.theme-card__meta,
.chip-row,
.argument-points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.82rem;
}

.chip--teal {
  background: rgba(15, 100, 102, 0.12);
  color: var(--teal);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.source-link,
.inline-link {
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(166, 27, 41, 0.24);
}

.source-link:hover,
.inline-link:hover {
  border-bottom-color: var(--accent-deep);
}

.theme-card h3,
.news-card h3,
.flashcard h3,
.sentence-card h3,
.argument-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.theme-card p,
.news-card p,
.flashcard p,
.sentence-card p,
.argument-card p,
.quiz-card p {
  margin: 0;
  line-height: 1.75;
}

.theme-card {
  display: grid;
  gap: 12px;
}

.theme-card__facts {
  display: grid;
  gap: 10px;
}

.fact-item {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(17, 23, 34, 0.04);
}

.fact-item strong {
  display: block;
  margin-bottom: 4px;
}

.flashcard-stage {
  display: grid;
  gap: 14px;
}

.flashcard {
  display: grid;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(228, 182, 96, 0.14), rgba(255, 255, 255, 0.9)),
    var(--paper-strong);
}

.flashcard__prompt {
  font-size: 1.08rem;
  font-weight: 700;
}

.flashcard__answer {
  padding: 14px;
  border-radius: 18px;
  background: rgba(166, 27, 41, 0.06);
}

.flashcard__answer[hidden] {
  display: none;
}

.card-actions,
.quiz-actions,
.generator-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.primary-button,
.ghost-button,
.mark-button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease;
}

.primary-button:hover,
.ghost-button:hover,
.mark-button:hover,
.primary-button:focus-visible,
.ghost-button:focus-visible,
.mark-button:focus-visible {
  transform: translateY(-1px);
}

.primary-button {
  padding: 12px 16px;
  background: var(--accent);
  color: white;
}

.ghost-button,
.mark-button {
  padding: 11px 15px;
  background: rgba(17, 23, 34, 0.06);
  color: var(--ink);
}

.mark-button.is-selected {
  background: var(--teal);
  color: white;
}

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

.quiz-card {
  border: 1px solid var(--line);
  background: rgba(17, 23, 34, 0.02);
}

.option-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.option-item {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  background: white;
}

.quiz-result {
  color: var(--ink-soft);
  line-height: 1.7;
}

.dictation-card,
.mistake-card {
  padding: 18px;
  border-radius: 22px;
  background: rgba(17, 23, 34, 0.03);
}

.speed-drill-card,
.framework-card {
  padding: 18px;
  border-radius: 22px;
}

.speed-drill-card {
  display: grid;
  gap: 12px;
  background:
    linear-gradient(180deg, rgba(15, 100, 102, 0.08), rgba(255, 255, 255, 0.92)),
    var(--paper-strong);
}

.dictation-card {
  display: grid;
  gap: 12px;
}

.field-label {
  display: block;
  margin: 14px 0 8px;
  font-weight: 700;
}

.study-textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: white;
  color: var(--ink);
  resize: vertical;
}

.study-textarea:focus-visible,
.generator-bar select:focus-visible {
  outline: 2px solid rgba(166, 27, 41, 0.22);
  outline-offset: 2px;
}

.study-textarea--essay {
  min-height: 260px;
  font-family: "Georgia", "Times New Roman", serif;
  line-height: 1.7;
}

.study-feedback {
  min-height: 24px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.mistake-card {
  display: grid;
  gap: 10px;
}

.mistake-card__title {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.timer-strip,
.essay-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.timer-display {
  min-width: 132px;
  padding: 12px 16px;
  border-radius: 18px;
  background: rgba(166, 27, 41, 0.08);
  color: var(--accent-deep);
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
}

.essay-meta {
  color: var(--ink-soft);
}

.essay-framework {
  margin-top: 18px;
}

.essay-framework h3 {
  margin: 0 0 12px;
}

.framework-card {
  display: grid;
  gap: 10px;
  background: rgba(17, 23, 34, 0.03);
}

.sentence-card {
  display: grid;
  gap: 12px;
}

.sentence-card__prompt {
  font-weight: 700;
}

.sentence-card details {
  border-top: 1px dashed rgba(17, 23, 34, 0.18);
  padding-top: 12px;
}

.sentence-card summary {
  cursor: pointer;
  color: var(--accent-deep);
}

.generator-bar select {
  flex: 1;
  min-width: 240px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
}

.argument-output {
  margin-top: 18px;
}

.argument-card {
  display: grid;
  gap: 16px;
  background:
    radial-gradient(circle at top right, rgba(15, 100, 102, 0.1), transparent 34%),
    var(--paper-strong);
}

.argument-block {
  padding: 14px;
  border-radius: 18px;
  background: rgba(17, 23, 34, 0.04);
}

.argument-block h4 {
  margin: 0 0 10px;
}

.argument-list {
  display: grid;
  gap: 10px;
  padding-left: 18px;
  margin: 0;
}

@media (max-width: 920px) {
  .hero__meta,
  .grid-cards,
  .module-nav {
    grid-template-columns: 1fr;
  }

  .section-head,
  .dashboard {
    flex-direction: column;
    align-items: stretch;
  }
}

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

  .hero,
  .dashboard,
  .panel {
    padding: 18px;
    border-radius: 24px;
  }

  .module-tab {
    text-align: left;
  }
}