:root {
  --bg: #fff8f0;
  --surface: #ffffff;
  --surface-soft: #fff0dc;
  --ink: #3b3027;
  --muted: #8c7969;
  --line: #ead9c5;
  --primary: #ff9f2e;
  --primary-dark: #9a5d17;
  --danger: #c75151;
  --green: #68ad86;
  --shadow: 0 18px 48px rgba(104, 70, 33, 0.11);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: radial-gradient(circle at top left, #ffe3ba 0, transparent 32rem), var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem clamp(1rem, 4vw, 3rem);
  background: rgba(255, 248, 240, 0.88);
  border-bottom: 1px solid rgba(234, 217, 197, 0.8);
  backdrop-filter: blur(18px);
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.8rem, 3vw, 2.6rem); }
h2 { margin-bottom: 0.45rem; }
.eyebrow { margin-bottom: 0.35rem; color: var(--primary-dark); font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }

main {
  width: min(1220px, calc(100% - 2rem));
  margin: 1.5rem auto 4rem;
}

.panel, .stat-card, .tab-panel {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.panel, .tab-panel { padding: 1.25rem; margin-bottom: 1rem; }
.panel-heading { margin-bottom: 1rem; }
.panel-heading p, .muted { color: var(--muted); line-height: 1.65; }
.panel-heading.inline { display: flex; align-items: end; justify-content: space-between; gap: 1rem; }

.grid-form, .form-panel {
  display: grid;
  gap: 0.9rem;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.78rem 0.85rem;
  color: var(--ink);
  background: #fffdfa;
  font: inherit;
}

textarea { min-height: 130px; resize: vertical; }

button {
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.05rem;
  color: #fff;
  background: var(--primary);
  font-weight: 900;
  cursor: pointer;
}

button:hover { filter: brightness(0.98); transform: translateY(-1px); }
button.ghost { color: var(--primary-dark); background: var(--surface-soft); }
button.danger, .danger { color: var(--danger); }
button.small { padding: 0.45rem 0.75rem; font-size: 0.85rem; }

.topbar-actions { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.session-label { color: var(--muted); font-weight: 800; }

.hidden { display: none !important; }

.module-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.module-preview span {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  color: var(--primary-dark);
  background: #fffdfa;
  font-weight: 900;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-card { padding: 1.1rem; }
.stat-card span { display: block; color: var(--muted); font-weight: 800; margin-bottom: 0.5rem; }
.stat-card strong { font-size: 2rem; }

.tabs {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.tab { color: var(--primary-dark); background: #fff2dc; }
.tab.active { color: #fff; background: var(--primary); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 0.85rem 0.75rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 0.85rem; }
td.content-cell { max-width: 420px; line-height: 1.55; }

.status {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: #fff0dc;
  color: var(--primary-dark);
  font-weight: 900;
  white-space: nowrap;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 420px) 1fr;
  gap: 1rem;
}

.stack { display: grid; gap: 0.75rem; }
.item {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem;
  background: #fffdfa;
}

.item-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.45rem;
}

.item-title { font-weight: 900; }
.item-meta { color: var(--muted); font-size: 0.86rem; }
.item-actions { display: flex; gap: 0.45rem; flex-wrap: wrap; margin-top: 0.7rem; }
.checkbox { display: flex; grid-template-columns: auto 1fr; align-items: center; gap: 0.5rem; }
.checkbox input { width: auto; }

.search { max-width: 340px; }

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

.link-card {
  display: block;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: inherit;
  background: #fffdfa;
  text-decoration: none;
}

.link-card strong { display: block; margin-bottom: 0.4rem; }
.link-card span { color: var(--muted); line-height: 1.5; }

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  max-width: min(420px, calc(100% - 2rem));
  padding: 0.9rem 1rem;
  border-radius: 14px;
  color: #fff;
  background: var(--ink);
  box-shadow: var(--shadow);
  z-index: 20;
}

@media (max-width: 860px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .stats-grid, .split, .links-grid { grid-template-columns: 1fr; }
  .panel-heading.inline { align-items: stretch; flex-direction: column; }
  .search { max-width: none; }
}