:root {
  --bg: #f5f6f4;
  --surface: #ffffff;
  --border: #e1e4df;
  --text-primary: #1f2620;
  --text-secondary: #5b6359;
  --text-muted: #8b9387;

  --sidebar-bg: #18231f;
  --sidebar-text: #c7d0c3;
  --sidebar-active: #24332c;

  --teal: #0f6e56;
  --teal-bg: #e1f5ee;
  --purple: #534ab7;
  --purple-bg: #eeedfe;
  --coral: #993c1d;
  --coral-bg: #faece7;
  --gray-bg: #f1efe8;
  --gray-text: #5f5e5a;

  --radius: 10px;
  --font-sans: "Inter", -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; }

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 20px 12px;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 16px; color: #fff;
  padding: 4px 10px 20px;
}
.sidebar-brand i { font-size: 20px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 8px; font-size: 14px;
  color: var(--sidebar-text);
}
.sidebar-nav a:hover { background: var(--sidebar-active); color: #fff; }
.sidebar-nav a.active { background: var(--teal); color: #fff; }
.sidebar-nav a i { font-size: 17px; width: 18px; text-align: center; }
.sidebar-divider {
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-muted); padding: 16px 10px 6px;
}
.sidebar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 10px 4px; border-top: 1px solid rgba(255,255,255,.08); margin-top: 8px;
}
.avatar {
  width: 32px; height: 32px; border-radius: 50%; background: var(--teal);
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 600;
  flex-shrink: 0;
}
.sidebar-user .meta { flex: 1; min-width: 0; }
.sidebar-user .name { font-size: 13px; color: #fff; font-weight: 500; }
.sidebar-user .role { font-size: 11px; color: var(--text-muted); }
.sidebar-user a { color: var(--text-muted); font-size: 16px; }
.sidebar-user a:hover { color: #fff; }

.content { flex: 1; padding: 28px 36px; max-width: 1180px; }

h1, h2, h3 { font-weight: 600; margin: 0 0 4px; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 22px; gap: 16px; flex-wrap: wrap; }
.page-header h1 { font-size: 21px; }
.page-subtitle { color: var(--text-secondary); font-size: 13px; margin-top: 2px; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 18px;
}
.card-title { font-size: 14px; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between; }

.btn-app {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--teal); color: #fff; border: none; border-radius: 8px;
  padding: 8px 14px; font-size: 13px; font-weight: 500; cursor: pointer;
}
.btn-app:hover { background: #0c5946; color: #fff; }
.btn-app.secondary { background: var(--gray-bg); color: var(--text-primary); }
.btn-app.secondary:hover { background: #e6e3d9; }
.btn-app.danger { background: var(--coral-bg); color: var(--coral); }

input.form-control, select.form-select, textarea.form-control {
  border-radius: 8px; border: 1px solid var(--border); font-size: 14px;
}
input.form-control:focus, select.form-select:focus, textarea.form-control:focus {
  border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-bg);
}
label { font-size: 12.5px; color: var(--text-secondary); font-weight: 500; margin-bottom: 4px; display: block; }

table.app-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.app-table th {
  text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em;
  color: var(--text-muted); border-bottom: 1px solid var(--border); padding: 8px 10px;
}
table.app-table td { padding: 10px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.app-table tr:hover td { background: #fafbf9; }

.badge-stage {
  display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 500; white-space: nowrap;
}
.badge-lead { background: var(--gray-bg); color: var(--gray-text); }
.badge-contacting { background: var(--purple-bg); color: var(--purple); }
.badge-sampled { background: var(--purple-bg); color: var(--purple); }
.badge-cooperating { background: var(--teal-bg); color: var(--teal); }
.badge-paused { background: var(--coral-bg); color: var(--coral); }

.stat-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.stat-box {
  flex: 1; min-width: 140px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
}
.stat-box .label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.stat-box .value { font-size: 24px; font-weight: 600; }

.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline-item { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.timeline-item:last-child { border-bottom: none; }
.timeline-icon {
  width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 14px; margin-top: 1px;
}
.timeline-icon.followup { background: var(--purple-bg); color: var(--purple); }
.timeline-icon.shipment { background: var(--teal-bg); color: var(--teal); }
.timeline-icon.stage { background: var(--gray-bg); color: var(--gray-text); }
.timeline-meta { font-size: 11.5px; color: var(--text-muted); margin-top: 2px; }

.flash-stack { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.flash { padding: 10px 14px; border-radius: 8px; font-size: 13.5px; }
.flash-success { background: var(--teal-bg); color: var(--teal); }
.flash-error { background: var(--coral-bg); color: var(--coral); }
.flash-info { background: var(--gray-bg); color: var(--gray-text); }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state i { font-size: 28px; margin-bottom: 8px; display: block; }

.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg);
}
.login-card {
  width: 360px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 32px;
}
.login-card h1 { font-size: 18px; margin-bottom: 4px; }
.login-card p { color: var(--text-secondary); font-size: 13px; margin-bottom: 24px; }