:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1b1b1b;
  --text-muted: #63645e;
  --border: #e3e2dd;
  --accent: #d3572e;
  --accent-contrast: #ffffff;
  --success-bg: #e6f4ea;
  --success-text: #1e6b34;
  --error-bg: #fdecea;
  --error-text: #a3271a;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15151a;
    --surface: #1f1f26;
    --text: #f1f1ee;
    --text-muted: #a3a3ab;
    --border: #34343e;
    --accent: #ff7a45;
    --accent-contrast: #15151a;
    --success-bg: #103c22;
    --success-text: #7cd99a;
    --error-bg: #3d1512;
    --error-text: #f3a79c;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

a {
  color: var(--accent);
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px 48px;
}

header.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px;
  max-width: 880px;
  margin: 0 auto;
  gap: 12px;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  text-align: center;
}

.btn:hover {
  filter: brightness(1.05);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.hero {
  text-align: center;
  padding: 28px 20px 8px;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.hero p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.board-grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.card-title {
  margin: 0 0 6px;
  font-size: 1.15rem;
}

.card-summary {
  margin: 0 0 12px;
  color: var(--text-muted);
}

.card-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px 16px;
  margin: 0 0 10px;
}

.card-meta div {
  display: flex;
  flex-direction: column;
}

.card-meta dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.card-meta dd {
  margin: 0;
  font-size: 0.95rem;
  word-break: break-word;
}

.card-details summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.card-details p {
  margin: 10px 0 4px;
}

.card-details ul {
  margin: 0 0 8px;
  padding-left: 20px;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 0;
}

.banner {
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 0.95rem;
}

.banner-success {
  background: var(--success-bg);
  color: var(--success-text);
}

.banner-error {
  background: var(--error-bg);
  color: var(--error-text);
}

form.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

input, textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  width: 100%;
}

textarea {
  min-height: 160px;
  resize: vertical;
}

.field-hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 520px) {
  .row-2 {
    grid-template-columns: 1fr;
  }
}

.spec-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
}

.spec-block h2 {
  margin-top: 0;
}

.spec-block h3 {
  margin-bottom: 4px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.spec-block ul {
  margin-top: 4px;
}

.pay-box {
  margin-top: 24px;
  text-align: center;
}

.pay-box .price {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-page {
  text-align: center;
  padding-top: 60px;
}

.loading {
  color: var(--text-muted);
  padding: 40px 0;
  text-align: center;
}

footer.site-footer {
  max-width: 880px;
  margin: 40px auto 0;
  padding: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  text-align: center;
}