:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #e3e7ee;
  --text: #1c2333;
  --muted: #6b7280;
  --primary: #2f6fed;
  --primary-dark: #1f56c2;
  --danger: #e0483e;
  --danger-bg: #fdecea;
  --success: #1e9e6b;
  --success-bg: #e8f8f0;
  --warning: #b8790a;
  --warning-bg: #fdf3e2;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
  width: 232px;
  flex-shrink: 0;
  background: #161b2e;
  color: #d9def0;
  padding: 20px 0;
}
.sidebar .brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  padding: 0 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 12px;
}
.sidebar .brand span { color: var(--primary); }
.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: #b7bede;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { color: #fff; text-decoration: none; background: rgba(255,255,255,0.04); }
.sidebar nav a.active {
  color: #fff;
  background: rgba(47,111,237,0.18);
  border-left-color: var(--primary);
  font-weight: 600;
}
.sidebar .badge-count {
  display: inline-block;
  min-width: 18px;
  padding: 0 5px;
  margin-left: 6px;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  line-height: 18px;
  border-radius: 9px;
  text-align: center;
}

.main { flex: 1; min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar .user { font-size: 13px; color: var(--muted); }
.topbar .user a { margin-left: 12px; }

.content { padding: 24px 28px 48px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.card h2 { margin-top: 0; font-size: 16px; }

.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.stat-tile .value { font-size: 26px; font-weight: 700; }
.stat-tile .label { font-size: 13px; color: var(--muted); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
table th, table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
table tr:hover td { background: #fafbfd; }

.btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
.btn:hover { text-decoration: none; border-color: #c9d0dd; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger-bg); border-color: #f2c6c2; color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-muted { background: #eef0f4; color: var(--muted); }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; }
.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=password],
.form-row input[type=date],
.form-row input[type=number],
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.form-row textarea { min-height: 120px; resize: vertical; }
.form-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.flash { padding: 12px 14px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.flash-success { background: var(--success-bg); color: var(--success); }
.flash-error { background: var(--danger-bg); color: var(--danger); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #161b2e, #2f6fed);
}
.login-box {
  width: 340px;
  background: #fff;
  border-radius: 14px;
  padding: 32px 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.login-box h1 { font-size: 20px; margin: 0 0 4px; }
.login-box .sub { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.login-box .btn-primary { width: 100%; padding: 11px; font-size: 14px; margin-top: 6px; }

.empty-state { padding: 30px; text-align: center; color: var(--muted); }

.tag-row { display: flex; gap: 6px; flex-wrap: wrap; }

.chat-thread { border: 1px solid var(--border); border-radius: var(--radius); max-height: 420px; overflow-y: auto; padding: 14px; background: #fafbfd; }
.chat-msg { margin-bottom: 12px; max-width: 75%; }
.chat-msg .meta { font-size: 11px; color: var(--muted); margin-bottom: 2px; }
.chat-msg .bubble { padding: 8px 12px; border-radius: 10px; background: #fff; border: 1px solid var(--border); display: inline-block; }
.chat-msg.mine { margin-left: auto; text-align: right; }
.chat-msg.mine .bubble { background: var(--primary); color: #fff; border-color: var(--primary); }

.bars { display: flex; align-items: flex-end; gap: 4px; height: 140px; }
.bars .bar { flex: 1; background: var(--primary); border-radius: 3px 3px 0 0; position: relative; min-height: 2px; }
.bars .bar span { position: absolute; top: -18px; left: 0; right: 0; text-align: center; font-size: 10px; color: var(--muted); }