:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #f9fafb;
  --text: #1c2430;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --accent-soft: #e8f0fe;
  --ok: #157f3b;
  --ok-soft: #e3f4e8;
  --warn: #b54708;
  --warn-soft: #fef0e1;
  --danger: #c4320a;
  --danger-soft: #fdecea;
  --pro: #6941c6;
  --pro-soft: #f0ebfd;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1318; --panel: #171c23; --panel-2: #1c222b; --text: #e6e9ee; --muted: #98a2b3; --line: #2a313c;
    --accent: #4d8dff; --accent-ink: #0b1220; --accent-soft: #16243d;
    --ok: #4ccb7a; --ok-soft: #12291b; --warn: #f5a35c; --warn-soft: #2d1f10;
    --danger: #ff7b61; --danger-soft: #331a14; --pro: #b49cff; --pro-soft: #221b38;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1318; --panel: #171c23; --panel-2: #1c222b; --text: #e6e9ee; --muted: #98a2b3; --line: #2a313c;
  --accent: #4d8dff; --accent-ink: #0b1220; --accent-soft: #16243d;
  --ok: #4ccb7a; --ok-soft: #12291b; --warn: #f5a35c; --warn-soft: #2d1f10;
  --danger: #ff7b61; --danger-soft: #331a14; --pro: #b49cff; --pro-soft: #221b38;
  --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
[hidden] { display: none !important; }
h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 15px; margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: Consolas, "Cascadia Mono", monospace; font-size: 12px; }

/* nút & ô nhập */
.btn {
  border: 1px solid var(--line); background: var(--panel); color: var(--text); border-radius: 8px;
  padding: 7px 14px; font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.07); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn:disabled { opacity: .55; cursor: default; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; width: 100%;
}
input:focus, select:focus, textarea:focus, .btn:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 1px;
}
label { display: grid; gap: 4px; font-weight: 600; font-size: 13px; }
.form-error { color: var(--danger); min-height: 1.2em; margin: 4px 0; font-size: 13px; }

/* đăng nhập */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: min(380px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 28px; box-shadow: var(--shadow); display: grid; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 16px; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); font-weight: 800; font-size: 13px; letter-spacing: .5px;
}

/* khung ứng dụng */
.app { display: grid; grid-template-columns: 232px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  background: var(--panel); border-right: 1px solid var(--line); padding: 18px 12px;
  display: flex; flex-direction: column; gap: 18px; position: sticky; top: 0; height: 100vh;
}
.sidebar .brand { padding: 0 8px; }
#nav { display: grid; gap: 2px; }
#nav a {
  color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; font-weight: 500;
}
#nav a:hover { background: var(--panel-2); }
#nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.sidebar-foot { margin-top: auto; display: grid; gap: 6px; padding: 0 8px; word-break: break-all; justify-items: start; }
.sidebar-foot .btn { padding-left: 0; }
.content { padding: 24px 28px 48px; max-width: 1200px; width: 100%; outline: none; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }

/* thẻ & bảng */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 22px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px;
  box-shadow: var(--shadow);
}
.card .num { font-size: 26px; font-weight: 700; line-height: 1.2; }
.card .lbl { color: var(--muted); font-size: 13px; }
.card.warn { border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); background: var(--warn-soft); }
.card.warn .num { color: var(--warn); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 16px 10px; flex-wrap: wrap; }
.panel-head h2 { margin: 0; }
.panel-head a { color: var(--accent); font-weight: 600; text-decoration: none; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }
tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover { background: var(--panel-2); }
.empty { padding: 28px 16px; text-align: center; color: var(--muted); }
.toolbar { display: flex; gap: 10px; padding: 14px 16px; flex-wrap: wrap; align-items: center; }
.toolbar input[type="search"] { max-width: 340px; }
.toolbar select { width: auto; }
.cell-sub { color: var(--muted); font-size: 12px; }

/* nhãn */
.badge {
  display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--panel-2); color: var(--muted); border: 1px solid var(--line); white-space: nowrap;
}
.badge.pro { background: var(--pro-soft); color: var(--pro); border-color: transparent; }
.badge.basic { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }

/* hộp thoại */
.modal {
  border: 1px solid var(--line); border-radius: 14px; padding: 0; width: min(720px, calc(100vw - 32px));
  background: var(--panel); color: var(--text); box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
}
.modal::backdrop { background: rgba(15, 19, 24, .45); }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-body { padding: 18px 20px; display: grid; gap: 16px; max-height: 70vh; overflow-y: auto; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--line); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.kv { display: grid; grid-template-columns: 150px 1fr; gap: 6px 12px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.section-title { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 0 0 8px; }

/* thông báo */
.toasts { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 50; }
.toast {
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px; max-width: 380px;
  box-shadow: var(--shadow); font-weight: 500;
}
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 760px) {
  .app { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto 1fr; }
  .sidebar {
    position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center;
    align-content: flex-start; padding: 10px 16px; gap: 10px; border-right: none; border-bottom: 1px solid var(--line);
  }
  #nav { grid-auto-flow: column; justify-content: start; overflow-x: auto; flex: 1 1 100%; min-width: 0; order: 3; }
  #nav a { white-space: nowrap; }
  .sidebar-foot { margin: 0 0 0 auto; grid-auto-flow: column; align-items: center; }
  .content { padding: 18px 16px 40px; }
  .form-grid, .kv { grid-template-columns: 1fr; }
  th, td { padding: 9px 10px; }
  .table-wrap table { min-width: 620px; }  /* cuộn ngang trong khung thay vì bóp cột */
}

.version { margin: 8px 0; }
.skill-view pre { white-space: pre-wrap; font-size: 12px; background: var(--bg, #f6f7f9); padding: 8px; border-radius: 6px; margin: 4px 0 8px; }
label.check { display: flex; align-items: center; gap: 8px; }
label.check input { width: auto; }
.temp-pw { font-size: 22px; letter-spacing: .08em; padding: 12px 16px; background: var(--panel-2); border: 1px dashed var(--line);
  border-radius: 8px; text-align: center; user-select: all; }