:root {
  color-scheme: dark;
  /* Monotone palette */
  --bg: #f6f7f8;
  --panel: #ffffff;
  --panel-2: #f2f2f4;
  --text: #0b0b0b;
  --muted: #6b6b6b;
  --line: #e1e1e1;
  /* Two accent colors for clarity */
  --accent: #1f6feb; /* blue */
  --accent-2: #f59e0b; /* amber */
  --danger: #b00020;
  --success: #2e7d32;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar,
.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  padding: 28px 0 16px;
  gap: 16px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-size: 0.74rem;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 2.5vw, 3rem);
}

.navlinks {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.navlinks a,
a,
button,
.button-link {
  color: var(--text);
}

.navlinks a,
a,
.button-link {
  text-decoration: none;
}

.shell {
  padding: 0 0 40px;
}

.panel,
.card,
.question-card {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

.panel {
  border-radius: 20px;
  padding: 22px;
  margin-bottom: 18px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: start;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

label,
fieldset {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

input,
select,
textarea,
button,
.button-link {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

textarea {
  resize: vertical;
}

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
}

button.secondary {
  background: var(--accent-2);
  color: #111;
}

button.danger {
  background: var(--danger);
  color: white;
}

.inline-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.card-list,
.question-stack {
  display: grid;
  gap: 14px;
}

.card,
.question-card {
  border-radius: 18px;
  padding: 16px;
}

.card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: #f4f4f4;
  color: var(--accent);
  border: 1px solid var(--line);
  font-size: 0.84rem;
}

.flash-stack {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.flash {
  border-radius: 14px;
  padding: 12px 14px;
  border: 1px solid transparent;
}

.flash.success {
  background: rgba(46, 125, 50, 0.06);
  border-color: rgba(46, 125, 50, 0.12);
}

.flash.error {
  background: rgba(176, 0, 32, 0.06);
  border-color: rgba(176, 0, 32, 0.12);
}

.flash.info {
  background: rgba(31, 111, 235, 0.06);
  border-color: rgba(31, 111, 235, 0.12);
}

.choice-grid {
  border: 0;
  padding: 0;
  margin: 0;
}

.choice-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.03);
}

.ordering-grid {
  display: grid;
  gap: 10px;
}

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

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--panel-2);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid var(--line);
}

ul {
  margin-top: 0;
}

@media (max-width: 860px) {
  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: start;
    flex-direction: column;
  }

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