:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --card: rgba(255, 255, 255, 0.92);
  --card-strong: #ffffff;
  --text: #162033;
  --muted: #5d6880;
  --line: rgba(18, 32, 56, 0.1);
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --accent-strong: #312e81;
  --success-bg: #e8fff1;
  --success-text: #137a48;
  --shadow: 0 18px 48px rgba(44, 60, 112, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(79, 70, 229, 0.12), transparent 28%),
    linear-gradient(180deg, #eef3ff 0%, var(--bg) 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  padding: 18px 14px 28px;
}

.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
}

.hero {
  padding: 8px 4px 18px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 31px;
  line-height: 1.08;
}

.hero-copy {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.search-panel {
  position: sticky;
  top: 8px;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 22px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  border-radius: 16px;
  background: var(--card-strong);
  border: 1px solid var(--line);
  padding: 0 14px;
}

.search-icon {
  color: var(--muted);
  font-size: 18px;
}

.search-box input {
  width: 100%;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  padding: 15px 0;
}

.filter-row {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 0 4px;
  scrollbar-width: none;
}

.filter-row::-webkit-scrollbar {
  display: none;
}

.chip {
  flex: 0 0 auto;
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  background: rgba(18, 32, 56, 0.06);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.chip.active {
  background: var(--accent);
  color: #fff;
}

.meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.ghost-button {
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
}

.result-list {
  display: grid;
  gap: 14px;
  padding-top: 16px;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 24px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.card-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border-radius: 999px;
  padding: 6px 11px;
  font-size: 12px;
  font-weight: 700;
}

.badge-primary {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.badge-secondary {
  background: rgba(22, 32, 51, 0.06);
  color: var(--muted);
}

.question-title {
  margin: 0;
  font-size: 18px;
  line-height: 1.55;
}

.options {
  display: grid;
  gap: 8px;
  margin: 14px 0;
}

.option-item {
  border-radius: 14px;
  background: rgba(79, 70, 229, 0.05);
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.6;
}

.answer-box {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}

.answer-line {
  border-radius: 16px;
  padding: 12px 14px;
  background: var(--success-bg);
  color: var(--success-text);
  font-size: 15px;
  font-weight: 800;
}

.analysis {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

mark {
  background: rgba(255, 213, 79, 0.72);
  color: inherit;
  border-radius: 6px;
  padding: 0 2px;
}

.empty-state {
  border-radius: 24px;
  background: var(--card);
  padding: 26px 18px;
  text-align: center;
  box-shadow: var(--shadow);
}

.empty-state h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.empty-state p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

@media (min-width: 768px) {
  body {
    padding: 28px 24px 40px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .card {
    padding: 22px;
  }
}