:root {
  --bg: #f7fafb;
  --panel: #ffffff;
  --panel-soft: #f1f5f7;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe4ea;
  --primary: #0f9f8f;
  --primary-dark: #0f766e;
  --accent: #f5b841;
  --danger: #dc2626;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 18px 50px rgba(15, 23, 42, .08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d111a;
    --panel: #121823;
    --panel-soft: #182130;
    --text: #f8fafc;
    --muted: #a7b2c2;
    --border: #283445;
    --primary: #2dd4bf;
    --primary-dark: #14b8a6;
    --accent: #f4c95d;
    --danger: #f87171;
    --shadow: 0 1px 2px rgba(0, 0, 0, .2), 0 18px 50px rgba(0, 0, 0, .22);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top left, rgba(20,184,166,.14), transparent 32%), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: inherit; text-decoration: none; }
.app { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 250px;
  padding: 18px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  color: white; background: var(--primary-dark);
  font-weight: 800;
}
.brand-title { font-weight: 700; }
.brand-subtitle { color: var(--muted); font-size: 12px; margin-top: 2px; }
.nav { display: grid; gap: 4px; }
.nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.nav a:hover, .nav a.active { background: var(--panel-soft); color: var(--text); }
.logout { position: absolute; left: 18px; right: 18px; bottom: 18px; }
.main { margin-left: 250px; padding: 28px; }
.mobile-header { display: none; }
.page-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-end; margin-bottom: 22px; }
h1 { margin: 0; font-size: clamp(28px, 4vw, 42px); letter-spacing: 0; }
h2, h3, p { margin-top: 0; }
.muted { color: var(--muted); }
.badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.grid { display: grid; gap: 16px; }
.metrics { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.two { grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); }
.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.card-pad { padding: 18px; }
.metric-label { color: var(--muted); font-size: 13px; }
.metric-value { margin-top: 8px; font-size: 28px; font-weight: 750; }
.metric-delta { color: var(--primary); font-size: 13px; font-weight: 700; margin-top: 6px; }
.spark { display: flex; align-items: end; gap: 3px; height: 42px; margin-top: 15px; }
.spark span { flex: 1; border-radius: 3px; background: var(--primary); opacity: .75; }
.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 13px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary { background: var(--primary-dark); color: white; border-color: var(--primary-dark); }
.input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 12px;
  background: var(--panel);
  color: var(--text);
}
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th { text-align: left; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
td, th { padding: 13px 12px; border-bottom: 1px solid var(--border); }
.chart { width: 100%; height: 320px; }
.bar-chart {
  height: 260px;
  display: flex;
  gap: 6px;
  align-items: end;
  padding-top: 22px;
}
.bar { flex: 1; min-width: 5px; border-radius: 5px 5px 0 0; background: linear-gradient(180deg, var(--primary), color-mix(in srgb, var(--primary) 40%, transparent)); }
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}
.login-card { width: min(100%, 430px); }
.list { display: grid; gap: 10px; }
.list-item {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 14px;
  background: color-mix(in srgb, var(--panel) 88%, var(--panel-soft));
}
.split { display: flex; justify-content: space-between; gap: 14px; align-items: center; }
.error { color: var(--danger); font-size: 14px; }

@media (max-width: 920px) {
  .sidebar { display: none; }
  .mobile-header {
    position: sticky; top: 0; z-index: 20;
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 16px;
    background: color-mix(in srgb, var(--panel) 88%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
  }
  .main { margin-left: 0; padding: 18px; }
  .page-head { display: block; }
  .two, .three { grid-template-columns: 1fr; }
  .mobile-nav { display: flex; gap: 10px; overflow-x: auto; padding: 0 18px 12px; }
  .mobile-nav a { white-space: nowrap; font-size: 13px; color: var(--muted); }
}