:root {
  --paper: #f6f0e5;
  --paper-strong: #ece1cf;
  --card: rgba(255, 252, 247, 0.9);
  --ink: #21493d;
  --ink-soft: #61776d;
  --line: rgba(33, 73, 61, 0.12);
  --accent: #cc8f48;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(236, 211, 182, 0.42), transparent 28%),
    radial-gradient(circle at bottom right, rgba(179, 212, 195, 0.34), transparent 24%),
    var(--paper);
}

button,
input,
textarea,
a {
  font: inherit;
}

.page {
  width: min(1200px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 18px 0 36px;
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr;
  gap: 18px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.toolbar,
.problem-overview,
.summary,
.card,
.group-section,
.dialog-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 12px 40px rgba(112, 90, 61, 0.08);
  backdrop-filter: blur(12px);
}

.hero-copy,
.hero-panel,
.toolbar,
.problem-overview,
.summary,
.dialog-card {
  padding: 22px;
}

.eyebrow,
.card-category,
.dialog-category,
.search span,
.copy-block span,
.card-scene,
.dialog-scene,
#resultSummary {
  color: var(--ink-soft);
}

h1,
h2,
p {
  margin: 0;
}

h2 {
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.18;
}

h1 {
  margin-top: 8px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.08;
  max-width: 11ch;
}

.intro {
  margin-top: 14px;
  max-width: 56ch;
  line-height: 1.75;
  color: var(--ink-soft);
}

.hero-actions,
.dialog-actions,
.card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 18px;
}

.hero-link,
.action,
.copy-btn,
.close-btn,
.chip {
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
}

.hero-link,
.action,
.copy-btn,
.close-btn {
  padding: 11px 16px;
}

.hero-link,
.action.secondary,
.copy-btn,
.close-btn,
.chip {
  background: rgba(33, 73, 61, 0.08);
  color: var(--ink);
}

.hero-link.primary,
.action.primary {
  background: var(--ink);
  color: #fffdf7;
}

.hero-panel {
  display: grid;
  gap: 12px;
}

.hero-stat {
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.56);
}

.hero-stat span {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.hero-stat strong {
  font-size: 20px;
}

.toolbar {
  margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 16px;
}

.problem-overview,
.showcase {
  margin-top: 18px;
}

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

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.problem-card {
  width: 100%;
  padding: 18px;
  border-radius: 22px;
  background:
    radial-gradient(circle at top right, rgba(204, 143, 72, 0.14), transparent 28%),
    rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(33, 73, 61, 0.1);
  text-align: left;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
}

.problem-card:hover,
.problem-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(112, 90, 61, 0.1);
  border-color: rgba(33, 73, 61, 0.22);
  outline: none;
}

.problem-card.active {
  background:
    radial-gradient(circle at top right, rgba(204, 143, 72, 0.2), transparent 28%),
    rgba(33, 73, 61, 0.08);
  border-color: rgba(33, 73, 61, 0.28);
  box-shadow: 0 14px 32px rgba(33, 73, 61, 0.08);
}

.problem-card strong {
  display: block;
  font-size: 22px;
  margin-bottom: 8px;
}

.problem-card span,
.group-meta,
.group-description {
  color: var(--ink-soft);
  line-height: 1.65;
}

.problem-dialog-card {
  width: min(760px, calc(100vw - 24px));
  padding: 26px;
}

.problem-dialog-copy {
  display: grid;
  gap: 16px;
}

.problem-dialog-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.problem-dialog-meta .hero-stat strong {
  font-size: 18px;
  line-height: 1.35;
}

.search {
  display: grid;
  gap: 8px;
}

.search input,
.copy-block textarea {
  width: 100%;
  border: 1px solid rgba(33, 73, 61, 0.18);
  border-radius: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink);
}

.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-content: start;
}

.chip {
  padding: 10px 14px;
}

.chip.active {
  background: var(--ink);
  color: #fffdf7;
}

.summary {
  margin-top: 14px;
}

.grouped-library {
  display: grid;
  gap: 18px;
}

.group-section {
  padding: 20px;
  border-radius: 28px;
}

.group-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 16px;
}

.group-copy {
  display: grid;
  gap: 8px;
}

.group-meta {
  font-size: 14px;
}

.group-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  overflow: hidden;
}

.cover-button {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.cover {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  background: var(--paper-strong);
}

.cover.is-broken,
.dialog-image-wrap img.is-broken {
  background:
    linear-gradient(135deg, rgba(236, 225, 207, 0.92), rgba(246, 240, 229, 0.98));
  min-height: 220px;
}

.card-body {
  padding: 16px;
}

.card-title {
  margin-top: 6px;
  font-size: 20px;
  line-height: 1.28;
}

.card-scene {
  margin-top: 10px;
  line-height: 1.6;
  min-height: 3.2em;
}

.card-actions {
  margin-top: 14px;
}

.dialog {
  width: min(1100px, calc(100vw - 20px));
  border: 0;
  padding: 0;
  background: transparent;
}

.dialog::backdrop {
  background: rgba(24, 35, 31, 0.55);
}

.dialog-card {
  position: relative;
}

.close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
}

.dialog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 18px;
  align-items: start;
}

.dialog-image-wrap {
  border-radius: 22px;
  overflow: hidden;
  background: var(--paper-strong);
}

.dialog-image-wrap img {
  display: block;
  width: 100%;
  height: auto;
}

.dialog-copy {
  display: grid;
  gap: 14px;
}

.copy-block {
  display: grid;
  gap: 8px;
}

.copy-block textarea {
  min-height: 110px;
  resize: vertical;
  line-height: 1.7;
}

@media (max-width: 920px) {
  .hero,
  .toolbar,
  .dialog-layout,
  .problem-grid,
  .group-grid,
  .problem-dialog-meta {
    grid-template-columns: 1fr;
  }

  .page {
    width: min(100vw - 18px, 1000px);
  }

  h1 {
    max-width: none;
  }

  .card-title {
    font-size: 18px;
  }
}

@media (max-width: 640px) {
  .page {
    width: calc(100vw - 14px);
    padding-top: 12px;
  }

  .hero-copy,
  .hero-panel,
  .toolbar,
  .summary,
  .dialog-card {
    padding: 18px;
    border-radius: 22px;
  }

  .grid {
    gap: 12px;
  }

  .card-body {
    padding: 14px;
  }

  .hero-link,
  .action,
  .copy-btn,
  .close-btn {
    width: 100%;
    text-align: center;
  }
}