:root {
  --bg: #0d1117;
  --bg-2: #161b22;
  --bg-3: #1f2630;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #00b3ff;
  --accent-2: #0090cc;
  --success: #00ff99;
  --danger: #ff4d4d;
  --warn: #ffcc00;
  --sidebar: 230px;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }

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

.sidebar {
  width: var(--sidebar);
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  padding: 20px 12px;
  flex-shrink: 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 10px 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.brand-logo {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #004d80);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
}
.brand-name { font-weight: 700; font-size: 15px; color: var(--accent); }
.brand-sub { font-size: 11px; color: var(--muted); }

.nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px;
  color: var(--muted); font-size: 14px;
  margin-bottom: 2px; transition: background .15s;
}
.nav a:hover { background: var(--bg-3); color: var(--text); }
.nav a.active { background: var(--bg-3); color: var(--accent); font-weight: 600; }

.main {
  margin-left: var(--sidebar);
  flex: 1;
  padding: 24px 30px;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.topbar h1 { font-size: 22px; }
.topbar .sub { color: var(--muted); font-size: 13px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; position: relative; overflow: hidden;
}
.card .val { font-size: 28px; font-weight: 700; }
.card .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; }
.card .icon { position: absolute; right: 14px; top: 14px; font-size: 22px; opacity: .4; }

.panel { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.panel h2 { font-size: 16px; margin-bottom: 14px; color: var(--accent); }
.panel p.desc { color: var(--muted); font-size: 13px; margin-bottom: 14px; }

label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 5px; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 12px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 14px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; min-height: 70px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0 20px; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: none;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: opacity .15s; color: #fff;
}
.btn:hover { opacity: .85; }
.btn.primary { background: var(--accent); }
.btn.success { background: var(--success); color: #053; }
.btn.danger { background: var(--danger); }
.btn.warn { background: var(--warn); color: #3a2e00; }
.btn.ghost { background: var(--bg-3); color: var(--text); border: 1px solid var(--border); }
.btn.small { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; margin-top: 14px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; color: var(--muted); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--border); }
td { padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:hover td { background: var(--bg-3); }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
}
.badge.green { background: rgba(0,255,153,.15); color: var(--success); }
.badge.red { background: rgba(255,77,77,.15); color: var(--danger); }
.badge.yellow { background: rgba(255,204,0,.15); color: var(--warn); }
.badge.gray { background: var(--bg-3); color: var(--muted); }

.empty { color: var(--muted); text-align: center; padding: 24px; font-size: 13px; }

.logout {
  position: absolute; bottom: 16px; left: 12px; right: 12px;
  padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-3); color: var(--danger); cursor: pointer; font-size: 13px;
}

.toast {
  position: fixed; top: 20px; right: 20px; z-index: 100;
  padding: 12px 18px; border-radius: 8px; background: var(--bg-2);
  border: 1px solid var(--border); box-shadow: 0 4px 20px rgba(0,0,0,.4);
  font-size: 14px; opacity: 0; transform: translateY(-10px); transition: all .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.ok { border-color: var(--success); }
.toast.err { border-color: var(--danger); }

/* login */
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-box {
  width: 340px; background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 14px; padding: 30px; text-align: center;
}
.login-box .logo {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #004d80);
  display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 700;
}
.login-box h1 { font-size: 20px; margin-bottom: 4px; }
.login-box .sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 12px; }

.mt { margin-top: 12px; }
.mb { margin-bottom: 12px; }
.flex { display: flex; gap: 8px; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

.chart-box { position: relative; height: 300px; margin-top: 10px; }

.save-bar { position: sticky; bottom: 0; background: var(--bg-2); border-top: 1px solid var(--border); padding: 12px 20px; display: flex; justify-content: flex-end; gap: 10px; margin: 20px -20px -20px; }