:root {
  --blue: #0012ff;
  --blue-dark: #002e6a;
  --blue-light: #52c4f0;
  --blue-tint: #eef3ff;
  --bg: #ffffff;
  --ink: #1c2340;
  --ink-2: #5a6178;
  --ink-3: #9aa1b5;
  --line: #e6e8f0;
  --ok: #0c7a43;
  --ok-bg: #e7f6ee;
  --warn: #8a5a00;
  --warn-bg: #fdf3dd;
  --err: #b3261e;
  --err-bg: #fdecea;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(0, 18, 106, .07), 0 6px 18px rgba(0, 18, 106, .05);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.5;
}
a { color: var(--blue); text-decoration: none; }
h1, h2, h3 { color: var(--blue-dark); margin: 0 0 .35em; font-weight: 800; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; }

.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 232px; flex-shrink: 0; padding: 20px 14px;
  border-right: 1px solid var(--line); background: #fff;
  display: flex; flex-direction: column; gap: 18px;
  position: sticky; top: 0; height: 100vh;
}
.brand { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; padding: 4px 8px; }
.brand-logo { width: 128px; height: auto; }
.brand-sub { font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar nav a {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border-radius: 10px; color: var(--ink-2); font-weight: 700;
}
.sidebar nav a svg { width: 18px; height: 18px; fill: currentColor; opacity: .85; }
.sidebar nav a:hover { background: var(--blue-tint); color: var(--blue-dark); }
.sidebar nav a.on { background: var(--blue); color: #fff; }
.logout-form { margin-top: auto; }
.content { flex: 1; padding: 22px 28px 48px; max-width: 1180px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.hello { display: flex; align-items: center; gap: 10px; color: var(--blue-dark); font-size: 1.05rem; }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px; }
.grid-kpi { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin: 14px 0 18px; }
.kpi .kpi-label { font-size: .8rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); display: flex; gap: 6px; align-items: center; }
.kpi .kpi-value { font-size: 1.65rem; font-weight: 900; color: var(--blue-dark); margin-top: 2px; }
.kpi .kpi-note { font-size: .8rem; color: var(--ink-3); }
.kpi-accent { border-top: 3px solid var(--blue); }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px; font-size: .78rem; font-weight: 800; }
.chip-blue { background: var(--blue-tint); color: var(--blue); }
.chip-ok { background: var(--ok-bg); color: var(--ok); }
.chip-warn { background: var(--warn-bg); color: var(--warn); }
.chip-err { background: var(--err-bg); color: var(--err); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 16px; border-radius: 10px; border: 1px solid transparent;
  font: inherit; font-weight: 800; cursor: pointer; transition: .15s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #0010d6; }
.btn-ghost { background: #fff; color: var(--ink-2); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-block { width: 100%; }
.btn-sm { padding: 5px 10px; font-size: .82rem; border-radius: 8px; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }
.filters a {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--ink-2); font-weight: 700; font-size: .85rem;
}
.filters a.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.filters form { display: flex; gap: 6px; align-items: center; }
.filters input[type=date] { padding: 5px 8px; border: 1px solid var(--line); border-radius: 8px; font: inherit; font-size: .85rem; color: var(--ink-2); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { text-align: left; font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-2); padding: 8px 10px; border-bottom: 2px solid var(--line); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--line); }
tr:hover td { background: #fafbff; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
label.field { display: flex; flex-direction: column; gap: 5px; font-weight: 700; font-size: .85rem; color: var(--ink-2); }
label.field input, label.field select {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  font: inherit; color: var(--ink); background: #fff;
}
label.field input:focus, label.field select:focus { outline: 2px solid var(--blue-light); border-color: var(--blue); }

.alert { padding: 11px 14px; border-radius: 10px; margin-bottom: 14px; font-weight: 700; }
.alert-ok { background: var(--ok-bg); color: var(--ok); }
.alert-err { background: var(--err-bg); color: var(--err); }
.alert-info { background: var(--blue-tint); color: var(--blue-dark); }

.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, #ffffff 0%, #f2f7ff 100%);
  padding: 20px;
}
.login-card { width: 100%; max-width: 400px; text-align: center; padding: 34px 30px; }
.login-card .brand-logo { width: 170px; margin-bottom: 4px; }
.login-card h1 { font-size: 1.2rem; }
.login-card p.sub { color: var(--ink-2); margin-top: 0; }
.login-card form { display: flex; flex-direction: column; gap: 12px; margin-top: 18px; text-align: left; }

.coupon-hero {
  background: linear-gradient(135deg, var(--blue) 0%, #2338ff 70%, var(--blue-light) 160%);
  color: #fff; border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
}
.coupon-hero .code { font-size: 2.1rem; font-weight: 900; letter-spacing: .12em; }
.copy-row { display: flex; gap: 8px; align-items: center; background: #fff; border: 1px dashed var(--blue-light); border-radius: 10px; padding: 10px 12px; margin-top: 8px; }
.copy-row code { flex: 1; overflow-wrap: anywhere; color: var(--blue-dark); font-weight: 700; }

.muted { color: var(--ink-3); font-size: .85rem; }
.section { margin-top: 22px; }
.row-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; align-items: start; }
.chart-box { position: relative; height: 300px; }

@media (max-width: 860px) {
  .shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; flex-wrap: wrap; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; }
  .logout-form { margin: 0 0 0 auto; }
  .content { padding: 16px; }
  .row-2 { grid-template-columns: 1fr; }
}