:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2130;
  --muted: #667085;
  --border: #e4e7ec;
  --primary: #3b5bdb;
  --primary-hover: #2f4bc0;
  --danger: #d92d20;
  --success: #12b76a;
  --warn-bg: #fff6e5;
  --warn-text: #8a5a00;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #171b24;
    --text: #e6e8ee;
    --muted: #98a2b3;
    --border: #2a303c;
    --primary: #6a85f0;
    --primary-hover: #8198f3;
    --warn-bg: #3a2c0c;
    --warn-text: #f5c56b;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}
body.loading > *:not(.loader) { visibility: hidden; }
.loader { display: none; }
body.loading .loader {
  display: grid; place-items: center; position: fixed; inset: 0; color: var(--muted);
}
[hidden] { display: none !important; }
a { color: var(--primary); }
h1, h2, h3 { margin: 0 0 .5rem; line-height: 1.25; }

/* ---------- Forms & buttons ---------- */
label { display: block; font-size: 13px; font-weight: 600; margin: 0 0 4px; }
input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.field { margin-bottom: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px; border-radius: 8px; border: 1px solid transparent; cursor: pointer;
  font: inherit; font-weight: 600; background: var(--primary); color: #fff;
}
.btn:hover { background: var(--primary-hover); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn.block { width: 100%; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { background: var(--bg); }
.btn.small { padding: 6px 10px; font-size: 13px; }
.btn.danger { background: var(--danger); }
.link-btn { background: none; border: 0; color: var(--primary); cursor: pointer; font: inherit; padding: 0; }

/* ---------- Auth page ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.auth-card {
  width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; box-shadow: var(--shadow);
}
.brand { font-weight: 800; font-size: 20px; margin-bottom: 4px; }
.sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; background: var(--bg); border-radius: 8px; padding: 4px; margin-bottom: 20px; }
.tabs button { border: 0; background: none; padding: 8px; border-radius: 6px; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.tabs button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.divider { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; margin: 18px 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.msg { font-size: 14px; padding: 10px 12px; border-radius: 8px; margin-bottom: 14px; }
.msg.error { background: rgba(217, 45, 32, .1); color: var(--danger); }
.msg.ok { background: rgba(18, 183, 106, .12); color: var(--success); }
.row-between { display: flex; justify-content: space-between; align-items: center; margin: -4px 0 14px; font-size: 13px; }

/* ---------- App shell ---------- */
.shell { display: grid; grid-template-columns: 230px 1fr; min-height: 100vh; }
.sidebar { background: var(--surface); border-right: 1px solid var(--border); padding: 20px 14px; display: flex; flex-direction: column; gap: 4px; }
.sidebar .brand { padding: 0 10px 16px; }
.nav-item { display: block; padding: 9px 12px; border-radius: 8px; color: var(--text); text-decoration: none; cursor: pointer; border: 0; background: none; font: inherit; text-align: left; width: 100%; }
.nav-item:hover { background: var(--bg); }
.nav-item.active { background: var(--bg); font-weight: 600; color: var(--primary); }
.sidebar .spacer { flex: 1; }
.main { padding: 24px 28px; min-width: 0; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.user-chip { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 700; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--bg); border: 1px solid var(--border); }
.badge.super_admin { background: #fde7e9; color: #b42318; border-color: transparent; }
.badge.admin { background: #e8edff; color: #2f4bc0; border-color: transparent; }
.badge.user { background: #eaf7ef; color: #067647; border-color: transparent; }
.badge.client { background: #f2f4f7; color: #475467; border-color: transparent; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.card h3 { font-size: 15px; }
.stat { font-size: 28px; font-weight: 800; }
.muted { color: var(--muted); font-size: 13px; }
.placeholder { border-style: dashed; color: var(--muted); }
.banner { background: var(--warn-bg); color: var(--warn-text); padding: 10px 14px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.section { margin-top: 24px; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--bg); }
tr:last-child td { border-bottom: 0; }
td select { width: auto; padding: 5px 8px; }
.toolbar { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar input { max-width: 280px; }
.toolbar select { width: auto; }

/* ---------- Modal ---------- */
dialog { border: 1px solid var(--border); border-radius: 12px; padding: 22px; background: var(--surface); color: var(--text); width: min(440px, 92vw); }
dialog::backdrop { background: rgba(0, 0, 0, .4); }
.actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

/* ---------- Toast ---------- */
#toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px); background: #1c2130; color: #fff; padding: 10px 16px; border-radius: 8px; opacity: 0; transition: .2s; pointer-events: none; font-size: 14px; z-index: 50; }
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.error { background: var(--danger); }
#toast.success { background: #067647; }

/* ---------- Mobile ---------- */
.menu-btn { display: none; }
@media (max-width: 800px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: 240px; z-index: 20; transform: translateX(-100%); transition: .2s; }
  .sidebar.open { transform: none; box-shadow: 0 0 40px rgba(0,0,0,.3); }
  .menu-btn { display: inline-flex; }
  .main { padding: 18px 16px; }
}