:root {
  --bg: #f3ecdf;
  --ink: #1e2430;
  --muted: rgba(30, 36, 48, 0.68);
  --line: rgba(30, 36, 48, 0.12);
  --accent: #b95a31;
  --accent-soft: rgba(185, 90, 49, 0.14);
  --panel: rgba(255, 255, 255, 0.84);
  --danger: #8f3e2a;
  --success: #2f6942;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  background:
    radial-gradient(circle at top left, #fff8ef 0, transparent 30%),
    radial-gradient(circle at bottom right, #ffd9c9 0, transparent 24%),
    linear-gradient(135deg, #f5efe4, #ede2d0);
}

.shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 28px 20px 52px;
}

.topbar {
  display: grid;
  grid-template-columns: 1.4fr minmax(300px, 380px);
  gap: 20px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 12px;
  color: var(--accent);
}

h1, h2, h3 {
  margin: 0;
}

h1 {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  line-height: 0.95;
}

.subtitle {
  max-width: 64ch;
  margin: 10px 0 0;
  color: var(--muted);
}

.auth-form,
.sidebar,
.detail-panel,
.view,
.card,
.stack-item {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 36px rgba(30, 36, 48, 0.08);
}

.auth-form {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 24px;
}

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

.auth-ready {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.is-hidden {
  display: none !important;
}

.auth-form label,
.field {
  display: grid;
  gap: 6px;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  border: 1px solid rgba(30, 36, 48, 0.15);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.88);
}

.button,
.nav-button {
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  cursor: pointer;
}

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

.button.secondary {
  background: rgba(30, 36, 48, 0.08);
  color: var(--ink);
}

.feedback {
  min-height: 24px;
  margin: 18px 0;
  color: var(--success);
}

.feedback.error {
  color: var(--danger);
}

.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
}

.sidebar {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 24px;
  align-self: start;
  position: sticky;
  top: 20px;
}

.nav-button {
  background: rgba(30, 36, 48, 0.06);
  color: var(--ink);
  text-align: left;
}

.nav-button.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.content {
  display: grid;
  gap: 20px;
}

.view {
  display: none;
  padding: 20px;
  border-radius: 28px;
}

.view.is-active {
  display: block;
}

.section-head {
  margin-bottom: 18px;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1.6fr) repeat(2, minmax(180px, 0.8fr));
  gap: 14px;
  margin-bottom: 16px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.summary-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.6);
}

.summary-card h3 {
  margin-bottom: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card,
.stack-item {
  border-radius: 22px;
  padding: 16px 18px;
}

.card h3,
.stack-item h3 {
  margin-bottom: 8px;
}

.meta,
.stack-item small,
.card small {
  color: var(--muted);
}

.detail-copy {
  margin-top: 10px;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
}

.inline-link {
  color: var(--accent);
  text-decoration: none;
}

.inline-link:hover {
  text-decoration: underline;
}

.meta-row,
.card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(30, 36, 48, 0.08);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pill.success {
  background: rgba(47, 105, 66, 0.14);
  color: var(--success);
}

.pill.error {
  background: rgba(143, 62, 42, 0.12);
  color: var(--danger);
}

.detail-panel {
  margin-top: 18px;
  border-radius: 24px;
  padding: 18px;
}

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

.detail-block {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.6);
}

.stack {
  display: grid;
  gap: 12px;
}

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

@media (max-width: 1080px) {
  .topbar,
  .layout,
  .toolbar,
  .summary-grid,
  .card-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}