:root {
  --navy: #14213d;
  --navy-light: #1f3a63;
  --accent: #fca311;
  --bg: #f4f6f9;
  --border: #e1e5ea;
  --text: #1c1f26;
  --muted: #6b7280;
  --green: #1a7f37;
  --red: #c62828;
  --amber: #b06d00;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px;
  background: var(--navy);
  color: #fff;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  padding: 18px 0;
}
.sidebar .brand { font-weight: 700; font-size: 15px; padding: 0 18px 16px; border-bottom: 1px solid rgba(255,255,255,.1); margin-bottom: 8px; }
.sidebar nav { display: flex; flex-direction: column; }
.sidebar nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 9px 18px;
  font-size: 14px;
}
.sidebar nav a:hover { background: var(--navy-light); color: #fff; }
.sidebar .nav-section { color: #7c8aa5; font-size: 11px; text-transform: uppercase; padding: 14px 18px 4px; letter-spacing: .05em; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar h1 { font-size: 19px; margin: 0; }
.user-box { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--muted); }
.btn-link { color: var(--navy); text-decoration: none; font-weight: 600; }

.content { padding: 24px 26px; }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #e6f4ea; color: var(--green); border: 1px solid #b7dfc2; }
.alert-error { background: #fdecea; color: var(--red); border: 1px solid #f3c1bd; }
.alert-warning { background: #fff4e0; color: var(--amber); border: 1px solid #ffd98e; }

.card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 18px 20px; margin-bottom: 20px; }
.cards-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; }
.stat .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 6px; }

table { width: 100%; border-collapse: collapse; background: #fff; }
table th, table td { padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; text-align: left; }
table th { background: #fafbfc; font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
table tr:hover td { background: #fafcff; }
.table-wrap { background: #fff; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }

.btn {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--navy-light); }
.btn-accent { background: var(--accent); color: #14213d; font-weight: 600; }
.btn-secondary { background: #fff; color: var(--navy); border: 1px solid var(--border); }
.btn-danger { background: var(--red); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: var(--text); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: 11px; font-weight: 700; text-transform: uppercase; }
.badge-paid, .badge-confirmed, .badge-active { background: #e6f4ea; color: var(--green); }
.badge-unpaid, .badge-pending { background: #fff4e0; color: var(--amber); }
.badge-partial, .badge-invoiced { background: #e3edff; color: #2453ce; }
.badge-cancelled, .badge-disabled { background: #fdecea; color: var(--red); }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--navy); }
.login-box { background: #fff; padding: 34px 32px; border-radius: 10px; width: 340px; }
.login-box h2 { margin-top: 0; text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--muted); }
.mt-16 { margin-top: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }