/* Aiducation Back Office — plain, fast, easy on the eyes. */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #F5F6F8;
  --card: #FFFFFF;
  --ink: #1E2530;
  --ink-2: #5A6472;
  --ink-3: #97A0AC;
  --line: #E3E6EB;
  --blue: #1F5FA8;
  --blue-dark: #174A80;
  --blue-soft: #EDF3FA;
  --green: #2E7D5B;
  --green-soft: #E8F4EE;
  --red: #B4442C;
  --red-soft: #FBEDE9;
  --gold: #9A7B24;
  --gold-soft: #FAF3DE;
}
html, body { height: 100%; }
body {
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg); color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; cursor: pointer; }

/* ---- Login ---- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 36px; width: 100%; max-width: 380px; box-shadow: 0 1px 3px rgba(20,30,40,0.06); }
.login-card .brand { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.login-card .brand img { width: 34px; height: 34px; }
.login-card .brand b { font-size: 17px; }
.login-card .sub { color: var(--ink-2); font-size: 13px; margin-bottom: 22px; }

/* ---- Shell ---- */
.shell { display: flex; min-height: 100vh; }
.side { width: 210px; background: var(--card); border-right: 1px solid var(--line); padding: 18px 12px; display: flex; flex-direction: column; gap: 2px; flex-shrink: 0; }
.side .brand { display: flex; align-items: center; gap: 9px; padding: 4px 10px 16px; }
.side .brand img { width: 28px; height: 28px; }
.side .brand b { font-size: 15px; }
.side .brand span { font-size: 11px; color: var(--ink-3); display: block; }
.nav-link { display: flex; align-items: center; gap: 9px; padding: 9px 12px; border: none; background: none; border-radius: 7px; color: var(--ink-2); font-weight: 500; text-align: left; width: 100%; }
.nav-link:hover { background: var(--bg); color: var(--ink); }
.nav-link.on { background: var(--blue-soft); color: var(--blue-dark); font-weight: 600; }
.side .foot { margin-top: auto; padding: 10px 12px; font-size: 12px; color: var(--ink-3); }
.side .foot button { border: none; background: none; color: var(--ink-2); padding: 0; font-size: 12.5px; }
.side .foot button:hover { color: var(--red); }

.main { flex: 1; padding: 26px 32px; min-width: 0; }
.page-title { font-size: 21px; font-weight: 650; margin-bottom: 4px; }
.page-sub { color: var(--ink-2); font-size: 13px; margin-bottom: 22px; }

/* ---- Cards / stats ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 9px; padding: 16px 18px; }
.stat .k { font-size: 12px; color: var(--ink-2); margin-bottom: 4px; }
.stat .v { font-size: 24px; font-weight: 650; letter-spacing: -0.3px; }
.stat .d { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

.panel { background: var(--card); border: 1px solid var(--line); border-radius: 9px; padding: 18px 20px; margin-bottom: 18px; }
.panel h2 { font-size: 15px; margin-bottom: 12px; }

/* ---- Table ---- */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.toolbar .grow { flex: 1; }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
thead th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); padding: 10px 12px; border-bottom: 1px solid var(--line); background: #FAFBFC; cursor: pointer; user-select: none; white-space: nowrap; }
tbody td { padding: 11px 12px; border-bottom: 1px solid var(--line); font-size: 13.5px; vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #F8FAFC; }
.muted { color: var(--ink-3); font-size: 12.5px; }
.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 12px; font-size: 13px; color: var(--ink-2); }

/* ---- Bits ---- */
.input, select.input, textarea.input {
  border: 1px solid var(--line); border-radius: 7px; padding: 8px 11px; font: inherit;
  background: var(--card); color: var(--ink); outline: none; min-width: 0;
}
.input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
label { font-size: 12.5px; font-weight: 600; color: var(--ink-2); display: block; margin-bottom: 5px; }
.field { margin-bottom: 14px; }
.btn { border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 7px; padding: 8px 14px; font-weight: 550; }
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-dark); }
.btn.danger { color: var(--red); border-color: #E8C9C0; }
.btn.danger:hover { background: var(--red-soft); }
.btn.small { padding: 5px 10px; font-size: 12.5px; }
.btn:disabled { opacity: 0.55; cursor: default; }

.tag { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.tag.free { background: var(--bg); color: var(--ink-2); }
.tag.starter { background: var(--blue-soft); color: var(--blue-dark); }
.tag.plus { background: var(--gold-soft); color: var(--gold); }
.tag.pro { background: var(--green-soft); color: var(--green); }
.tag.off { background: var(--red-soft); color: var(--red); }
.tag.on { background: var(--green-soft); color: var(--green); }

.bar { height: 6px; background: var(--bg); border-radius: 999px; overflow: hidden; min-width: 60px; }
.bar i { display: block; height: 100%; background: var(--blue); border-radius: 999px; }

.err { background: var(--red-soft); color: var(--red); border-radius: 7px; padding: 9px 12px; font-size: 13px; margin-bottom: 12px; display: none; }
.err.show { display: block; }

/* ---- Detail layout ---- */
.detail-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 980px) { .detail-grid { grid-template-columns: 1fr; } }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.kv:last-child { border-bottom: none; }
.kv b { text-align: right; }
.note { border-bottom: 1px solid var(--line); padding: 9px 0; font-size: 13px; }
.note .when { color: var(--ink-3); font-size: 11.5px; }
.actions-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }

/* ---- Toasts ---- */
#toasts { position: fixed; bottom: 18px; right: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 50; }
.toast { background: var(--ink); color: #fff; border-radius: 8px; padding: 10px 16px; font-size: 13px; box-shadow: 0 4px 14px rgba(0,0,0,0.18); }
.toast.err { background: var(--red); }

@media (max-width: 760px) {
  .side { width: 60px; padding: 14px 6px; }
  .side .brand b, .side .brand span, .nav-link em, .side .foot { display: none; }
  .main { padding: 18px 14px; }
}