:root {
  --bg: #f4f7f8;
  --panel: #ffffff;
  --panel-soft: #f8fbfc;
  --line: #d8e3e8;
  --text: #12212b;
  --muted: #667784;
  --brand: #2f8b8f;
  --brand-soft: #dff1f1;
  --green: #1f8f5f;
  --yellow: #b58500;
  --red: #bb3d3d;
  --blue: #296fcb;
  --shadow: 0 16px 40px rgba(11, 36, 49, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #f6fafb 0%, #eef4f6 100%);
  color: var(--text);
}

button,
select,
textarea,
input {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #102029;
  color: #eef6f7;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
}

.brand h1,
.brand p {
  margin: 0;
}

.brand p {
  color: rgba(238, 246, 247, 0.72);
  margin-top: 4px;
  font-size: 14px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #6bc6c9, #2d767a);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-item {
  border: none;
  border-radius: 14px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.06);
  color: #eef6f7;
  cursor: pointer;
  text-align: left;
}

.nav-item.active,
.nav-item:hover {
  background: rgba(107, 198, 201, 0.18);
}

.sidebar-note {
  margin-top: auto;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.sidebar-note h3 {
  margin-top: 0;
}

.sidebar-note p {
  margin-bottom: 0;
  color: rgba(238, 246, 247, 0.78);
  line-height: 1.6;
}

.main {
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.topbar h2,
.topbar p {
  margin: 0;
}

.topbar p {
  margin-top: 6px;
  color: var(--muted);
}

.ghost-btn {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.metrics-grid,
.grid.two-col,
.projects-layout {
  display: grid;
  gap: 18px;
}

.metrics-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 18px;
}

.grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 18px;
}

.projects-layout {
  grid-template-columns: 1.1fr 1fr;
}

.card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 18px;
}

.metric-card {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.metric-label {
  color: var(--muted);
  font-size: 14px;
}

.metric-value {
  font-size: 34px;
  font-weight: 700;
  margin: 10px 0 6px;
}

.metric-footnote {
  color: var(--muted);
  font-size: 13px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.card-header h3 {
  margin: 0;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.stack-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item-card {
  padding: 14px;
  border-radius: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.item-title-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.item-title {
  margin: 0;
  font-size: 16px;
}

.item-meta,
.item-desc {
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.6;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge.green { background: rgba(31, 143, 95, 0.12); color: var(--green); }
.badge.yellow { background: rgba(181, 133, 0, 0.12); color: var(--yellow); }
.badge.red { background: rgba(187, 61, 61, 0.12); color: var(--red); }
.badge.blue { background: rgba(41, 111, 203, 0.12); color: var(--blue); }
.badge.gray { background: rgba(102, 119, 132, 0.12); color: var(--muted); }

.status-breakdown {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.status-tile {
  border-radius: 14px;
  padding: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.status-tile strong {
  display: block;
  font-size: 28px;
  margin-top: 8px;
}

.kpi-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.kpi-row {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.kpi-name {
  font-weight: 600;
}

.kpi-trend.up { color: var(--green); }
.kpi-trend.flat { color: var(--yellow); }
.kpi-trend.down { color: var(--red); }

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

.filters label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 180px;
  color: var(--muted);
}

select,
textarea {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: white;
  color: var(--text);
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 72vh;
  overflow: auto;
}

.project-row {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  background: var(--panel-soft);
}

.project-row h4 {
  margin: 0 0 10px;
}

.project-row .row-top,
.project-row .row-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.project-row .row-bottom {
  margin-top: 12px;
}

.meta-inline {
  color: var(--muted);
  font-size: 13px;
}

.link-btn,
.primary-btn {
  border: none;
  cursor: pointer;
  border-radius: 12px;
  padding: 10px 14px;
}

.link-btn {
  background: rgba(47, 139, 143, 0.12);
  color: var(--brand);
}

.primary-btn {
  background: var(--brand);
  color: white;
}

.project-detail.hidden {
  display: none;
}

.empty-state {
  color: var(--muted);
  min-height: 320px;
  display: grid;
  place-items: center;
  text-align: center;
}

.detail-section + .detail-section {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.detail-grid .field {
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}

.field-label {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
}

.timeline-list,
.actions-list,
.update-history {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-grid {
  display: grid;
  gap: 12px;
}

textarea {
  resize: vertical;
  min-height: 84px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-check input {
  width: 18px;
  height: 18px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

@media (max-width: 1100px) {
  .app-shell,
  .projects-layout,
  .metrics-grid,
  .grid.two-col {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .main {
    padding: 18px;
  }
}