:root {
  --system-bg: #f3f6f5;
  --system-surface: #ffffff;
  --system-surface-subtle: #f7faf9;
  --system-line: #dfe8e5;
  --system-line-strong: #cbd9d5;
  --system-text: #172321;
  --system-muted: #667672;
  --system-primary: #087f72;
  --system-primary-hover: #066a60;
  --system-primary-soft: #e7f5f2;
  --system-primary-border: #a9d9d2;
  --system-nav: #182b2d;
  --system-nav-deep: #102123;
  --system-info: #2f6fb3;
  --system-info-soft: #eaf2fb;
  --system-success: #21884b;
  --system-success-soft: #eaf7ef;
  --system-warning: #b9770e;
  --system-warning-soft: #fff5df;
  --system-danger: #c83d4b;
  --system-danger-soft: #fcedef;
  --system-shadow: 0 8px 24px rgba(22, 48, 46, .07);
  --system-shadow-raised: 0 14px 36px rgba(22, 48, 46, .11);

  --ui-bg: var(--system-bg);
  --ui-panel: var(--system-surface);
  --ui-border: var(--system-line);
  --ui-text: var(--system-text);
  --ui-muted: var(--system-muted);
  --ui-primary: var(--system-primary);
  --ui-primary-soft: var(--system-primary-soft);
  --ui-success: var(--system-success);
  --ui-danger: var(--system-danger);
  --ui-warning: var(--system-warning);
  --ui-shadow: var(--system-shadow);
  --brand: var(--system-primary);
  --brand-dark: var(--system-primary-hover);
  --brand-soft: var(--system-primary-soft);
  --canvas: var(--system-bg);
  --surface: var(--system-surface);
  --ink: var(--system-text);
  --muted: var(--system-muted);
  --line: var(--system-line);
  --nav: var(--system-nav);
  --bs-primary: var(--system-primary);
  --bs-primary-rgb: 8, 127, 114;
  --bs-link-color: var(--system-primary);
  --bs-link-hover-color: var(--system-primary-hover);
}

html { color-scheme: light; }

body {
  background: var(--system-bg) !important;
  color: var(--system-text) !important;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

.sidebar {
  background: linear-gradient(180deg, var(--system-nav), var(--system-nav-deep)) !important;
  box-shadow: 4px 0 24px rgba(16, 33, 35, .18) !important;
}

.sidebar .logo {
  min-height: 66px;
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, .08) !important;
}

.sidebar .logo i {
  color: #58c7b8 !important;
}

.sidebar .nav-section {
  color: rgba(255, 255, 255, .42) !important;
  letter-spacing: 0;
}

.sidebar .nav-link {
  border: 0 !important;
  border-radius: 7px !important;
  color: rgba(255, 255, 255, .7) !important;
}

.sidebar .nav-link:hover {
  color: #fff !important;
  background: rgba(255, 255, 255, .08) !important;
}

.sidebar .nav-link.active {
  color: #fff !important;
  background: rgba(45, 181, 164, .17) !important;
  box-shadow: inset 3px 0 0 #58c7b8 !important;
}

/* Keep the application shell identical between legacy and newly designed pages. */
@media (min-width: 769px) {
  .sidebar {
    inset: 0 auto 0 0 !important;
    width: 220px !important;
    min-height: 100vh !important;
    height: auto !important;
  }

  .sidebar .logo {
    box-sizing: border-box !important;
    display: flex !important;
    align-items: center !important;
    height: 66px !important;
    min-height: 66px !important;
    padding: 0 20px !important;
  }

  .sidebar .nav {
    margin-top: 0 !important;
    padding: 8px 0 !important;
  }

  .sidebar .nav-section {
    box-sizing: border-box !important;
    height: 29px !important;
    padding: 8px 20px 6px !important;
  }

  .sidebar .nav-item {
    min-height: 42px !important;
  }

  .sidebar .nav-link {
    box-sizing: border-box !important;
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    height: 38px !important;
    margin: 2px 10px !important;
    padding: 9px 12px !important;
    white-space: nowrap !important;
  }

  .sidebar .nav-link i {
    flex: 0 0 20px !important;
    width: 20px !important;
    margin-right: 0 !important;
    text-align: center !important;
  }

  .main {
    margin-left: 220px !important;
  }

  .topbar {
    box-sizing: border-box !important;
    height: 66px !important;
    min-height: 66px !important;
  }
}

.topbar {
  background: rgba(255, 255, 255, .97) !important;
  border-bottom: 1px solid var(--system-line) !important;
  box-shadow: 0 4px 18px rgba(22, 48, 46, .04) !important;
}

.topbar h1,
.topbar h2,
.topbar h4 { color: var(--system-text) !important; }

.topbar h1 i,
.topbar h2 i,
.topbar h4 i,
.card-header > i,
.panel-header > i { color: var(--system-primary) !important; }

.content,
.shell { width: 100%; }

.card,
.panel,
.stage-card,
.proj-card,
.project-card,
.search-panel,
.stat-card,
.metric-card,
.summary-card {
  border-color: var(--system-line) !important;
  border-radius: 8px !important;
  background: var(--system-surface) !important;
  box-shadow: var(--system-shadow) !important;
}

.card:hover,
.project-card:hover,
.proj-card:hover {
  border-color: var(--system-primary-border) !important;
  box-shadow: var(--system-shadow-raised) !important;
}

.card-header,
.panel-header {
  background: var(--system-surface-subtle) !important;
  border-bottom-color: var(--system-line) !important;
  color: var(--system-text) !important;
}

.btn {
  border-radius: 7px !important;
  font-weight: 600;
  letter-spacing: 0;
}

.btn-primary {
  color: #fff !important;
  background: var(--system-primary) !important;
  border-color: var(--system-primary) !important;
  box-shadow: 0 6px 14px rgba(8, 127, 114, .18) !important;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--system-primary-hover) !important;
  border-color: var(--system-primary-hover) !important;
}

.btn-outline-primary {
  color: var(--system-primary) !important;
  border-color: var(--system-primary-border) !important;
  background: #fff !important;
}

.btn-outline-primary:hover {
  color: var(--system-primary-hover) !important;
  border-color: var(--system-primary) !important;
  background: var(--system-primary-soft) !important;
}

.btn-outline-secondary {
  color: #53635f !important;
  border-color: var(--system-line-strong) !important;
  background: #fff !important;
}

.btn-outline-secondary:hover {
  color: var(--system-text) !important;
  border-color: #aebfba !important;
  background: var(--system-surface-subtle) !important;
}

.btn-outline-danger {
  color: var(--system-danger) !important;
  border-color: #e6b8be !important;
  background: #fff !important;
}

.btn-outline-danger:hover {
  color: #fff !important;
  border-color: var(--system-danger) !important;
  background: var(--system-danger) !important;
}

.form-control,
.form-select,
.input-group-text {
  min-height: 40px;
  border-color: var(--system-line-strong) !important;
  border-radius: 7px;
  color: var(--system-text);
}

.input-group > .form-control:not(:last-child),
.input-group > .form-select:not(:last-child) { border-radius: 7px 0 0 7px; }

.input-group > .btn:last-child { border-radius: 0 7px 7px 0 !important; }

.form-control:focus,
.form-select:focus {
  border-color: #62b7ad !important;
  box-shadow: 0 0 0 .2rem rgba(8, 127, 114, .12) !important;
}

.form-label { color: #41524e; font-weight: 600; }

.table { color: var(--system-text); }

.table thead th,
.table-data thead th {
  background: #f3f7f6 !important;
  color: #53635f !important;
  border-bottom-color: var(--system-line) !important;
}

.table tbody td,
.table-data tbody td { border-color: #edf2f0 !important; }

.table-hover tbody tr:hover > * { background: #f4faf8 !important; }

.modal-content {
  border: 1px solid var(--system-line) !important;
  border-radius: 10px !important;
  box-shadow: 0 24px 70px rgba(20, 46, 44, .22) !important;
}

.modal-header,
.modal-footer {
  background: var(--system-surface-subtle) !important;
  border-color: var(--system-line) !important;
}

.user-pill,
.role-pill {
  color: var(--system-primary-hover) !important;
  background: var(--system-primary-soft) !important;
  border: 1px solid var(--system-primary-border) !important;
  border-radius: 999px !important;
}

.text-primary { color: var(--system-primary) !important; }
.bg-primary { background-color: var(--system-primary) !important; }
.border-primary { border-color: var(--system-primary) !important; }
.text-muted { color: var(--system-muted) !important; }
.badge.bg-success { background: var(--system-success-soft) !important; color: var(--system-success) !important; }
.badge.bg-warning { background: var(--system-warning-soft) !important; color: var(--system-warning) !important; }
.badge.bg-danger { background: var(--system-danger-soft) !important; color: var(--system-danger) !important; }
.badge.bg-primary { background: var(--system-info-soft) !important; color: var(--system-info) !important; }
.badge.bg-secondary { background: #eef2f1 !important; color: #5e6d69 !important; }

.nav-tabs .nav-link { color: var(--system-muted) !important; }
.nav-tabs .nav-link:hover { color: var(--system-primary) !important; background: var(--system-primary-soft) !important; }
.nav-tabs .nav-link.active {
  color: var(--system-primary) !important;
  border-bottom-color: var(--system-primary) !important;
}

.refresh-btn,
.icon-button {
  color: #52625e !important;
  border-color: var(--system-line-strong) !important;
  background: #fff !important;
}

.refresh-btn:hover,
.icon-button:hover {
  color: var(--system-primary) !important;
  border-color: var(--system-primary-border) !important;
  background: var(--system-primary-soft) !important;
}

body.login-page {
  display: flex;
  align-items: center;
  min-height: 100vh;
  background: #edf3f1 !important;
}

.login-page::before {
  content: "";
  position: fixed;
  inset: 0 0 0 50%;
  background: var(--system-nav);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.login-page .container { position: relative; z-index: 1; }
.login-page .login-card { max-width: 420px; }
.login-page .card { border: 1px solid rgba(255, 255, 255, .7) !important; box-shadow: 0 24px 64px rgba(16, 33, 35, .18) !important; }
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; }
.login-mark { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 8px; background: var(--system-primary); color: #fff; font-size: 24px; font-weight: 800; }
.login-brand h1 { margin: 0; color: var(--system-text); font-size: 24px; font-weight: 800; }
.login-brand p { margin: 3px 0 0; color: var(--system-muted); font-size: 13px; }

@media (max-width: 768px) {
  body { background: var(--system-bg) !important; }

  .sidebar {
    inset: auto 0 0 !important;
    width: 100% !important;
    height: 64px !important;
    min-height: 64px !important;
    background: #fff !important;
    border-top: 1px solid var(--system-line) !important;
    box-shadow: 0 -8px 26px rgba(22, 48, 46, .12) !important;
  }

  .sidebar .nav {
    height: 100% !important;
    margin: 0 !important;
    padding: 0 4px !important;
  }

  .sidebar .nav-item {
    flex: 0 0 74px !important;
    min-width: 74px !important;
    height: 100% !important;
  }

  .sidebar .nav-link {
    box-sizing: border-box !important;
    height: 56px !important;
    margin: 4px 0 !important;
    padding: 6px 2px !important;
    font-size: 10px !important;
  }

  .main {
    margin-left: 0 !important;
  }

  .sidebar .nav-link { color: var(--system-muted) !important; }
  .sidebar .nav-link:hover { color: var(--system-primary) !important; background: var(--system-primary-soft) !important; }
  .sidebar .nav-link.active {
    color: var(--system-primary) !important;
    background: var(--system-primary-soft) !important;
    box-shadow: none !important;
  }

  .card,
  .panel,
  .stage-card,
  .proj-card,
  .project-card { box-shadow: 0 5px 18px rgba(22, 48, 46, .06) !important; }

  .login-page::before { display: none; }
  .login-page .container { padding: 18px; }
  .login-page .card-body { padding: 24px !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}