/* ═══════════════════════════════════════════
   SEA-JC v2 — 全局样式
   ═══════════════════════════════════════════ */

:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #8888a0;
  --border: #e2e4ec;
  --primary: #4f46e5;
  --primary-light: #eef2ff;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --info: #3b82f6;
  --info-bg: #eff6ff;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.1);
}

* { margin:0; padding:0; box-sizing:border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* Nav */
nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 52px;
  gap: 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
nav .brand {
  font-weight: 700;
  font-size: 16px;
  color: var(--primary);
  text-decoration: none;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all .15s;
}
nav a:hover, nav a.active { color: var(--primary); background: var(--primary-light); }
nav .spacer { flex:1; }
nav .user-badge {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
}
nav .user-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 200;
}
nav .user-menu.show { display: block; }
nav .user-menu div {
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
}
nav .user-menu div:hover { background: var(--primary-light); }

/* Layout */
.container { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* Cards */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 16px; font-weight: 600; }
.card-header h3 { font-size: 14px; font-weight: 600; }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Stats */
.stat-card { text-align: center; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 12px; color: var(--muted); margin-top: 4px; }
.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning .stat-value { color: var(--warning); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #4338ca; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-outline { background: #fff; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-xs { padding: 2px 6px; font-size: 11px; }

/* Form */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* Table */
table { width: 100%; border-collapse: collapse; }
table th, table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
table th {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  background: var(--bg);
}
table tr:hover td { background: #fafafa; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-muted { background: #f3f4f6; color: var(--muted); }

/* Status badges */
.status-new { color: var(--muted); }
.status-assigned { color: var(--info); }
.status-accepted { color: var(--info); }
.status-in_progress { color: var(--primary); }
.status-pending_review { color: var(--warning); }
.status-done, .status-completed { color: var(--success); }
.status-closed, .status-cancelled { color: var(--muted); text-decoration: line-through; }
.status-blocked { color: var(--danger); }
.status-overdue { color: var(--danger); font-weight: 600; }
.status-at_risk { color: var(--warning); font-weight: 600; }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 300;
  align-items: center;
  justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 24px;
}
.modal h3 { font-size: 16px; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* Kanban */
.kanban { display: flex; gap: 16px; overflow-x: auto; }
.kanban-col {
  flex: 1;
  min-width: 250px;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 12px;
}
.kanban-col h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.kanban-card {
  background: var(--card);
  border-radius: 6px;
  padding: 12px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
  cursor: pointer;
  transition: all .15s;
}
.kanban-card:hover { box-shadow: var(--shadow-lg); }
.kanban-card .kc-title { font-weight: 500; font-size: 13px; }
.kanban-card .kc-meta { font-size: 11px; color: var(--muted); margin-top: 4px; }

/* Milestone bar */
.milestone-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 16px 0;
}
.milestone-node {
  flex: 1;
  text-align: center;
  position: relative;
}
.milestone-node .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
  margin: 0 auto 4px;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--border);
}
.milestone-node .dot.done { background: var(--success); box-shadow: 0 0 0 2px var(--success); }
.milestone-node .dot.at_risk { background: var(--warning); box-shadow: 0 0 0 2px var(--warning); }
.milestone-node .dot.overdue { background: var(--danger); box-shadow: 0 0 0 2px var(--danger); }
.milestone-node .label { font-size: 10px; color: var(--muted); margin-top: 2px; }
.milestone-node .date { font-size: 10px; color: var(--muted); }

.milestone-connector {
  flex: 0 0 30px;
  height: 3px;
  background: var(--border);
  margin-top: -12px;
}

/* Gantt */
.gantt { position: relative; overflow-x: auto; }
.gantt-row {
  display: flex;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  min-height: 36px;
}
.gantt-label { width: 200px; font-size: 12px; padding-right: 12px; flex-shrink: 0; }
.gantt-track { flex: 1; position: relative; height: 24px; }
.gantt-bar {
  position: absolute;
  height: 100%;
  border-radius: 4px;
  background: var(--primary);
  color: #fff;
  font-size: 10px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  white-space: nowrap;
  cursor: pointer;
}
.gantt-bar.overdue { background: var(--danger); }
.gantt-bar.done { background: var(--success); }
.gantt-bar.at_risk { background: var(--warning); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  box-shadow: var(--shadow-lg);
  z-index: 400;
  animation: slideIn .3s ease;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
@keyframes slideIn { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Empty state */
.empty { text-align: center; padding: 48px 16px; color: var(--muted); }
.empty .empty-icon { font-size: 40px; margin-bottom: 8px; }
.empty p { font-size: 13px; }

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .kanban { flex-direction: column; }
  nav { padding: 0 12px; gap: 10px; overflow-x: auto; }
}