:root {
  --bg: #f5f6fa;
  --panel: #ffffff;
  --panel-2: #f0f2f7;
  --border: #e3e6ee;
  --text: #1c2030;
  --muted: #6b7286;
  --primary: #5b5bd6;
  --primary-text: #ffffff;
  --up: #16a34a;
  --down: #dc2626;
  --warn: #d97706;
  --unknown: #9ca3af;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --radius: 12px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --panel: #171a23;
    --panel-2: #1f2330;
    --border: #2a2f3d;
    --text: #e6e8ef;
    --muted: #9198ab;
    --primary: #7c7cf0;
    --up: #22c55e;
    --down: #ef4444;
    --warn: #f59e0b;
    --unknown: #6b7280;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: Vazirmatn, Tahoma, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.6;
}
a { color: var(--primary); }
.ltr { direction: ltr; unicode-bidi: isolate; display: inline-block; }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 13px; }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 14px 24px; background: var(--panel); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--primary); }
.brand span { color: var(--text); }
.summary { display: flex; gap: 8px; flex-wrap: wrap; margin-inline-start: auto; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px;
  background: var(--panel-2); font-size: 13px; white-space: nowrap;
}
.pill b { font-weight: 700; }

.tabs { display: flex; gap: 4px; padding: 0 24px; background: var(--panel); border-bottom: 1px solid var(--border); overflow-x: auto; }
.tabs button {
  background: none; border: 0; padding: 12px 16px; font: inherit; color: var(--muted); cursor: pointer;
  border-bottom: 2px solid transparent; white-space: nowrap;
}
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 500; }

main { max-width: 1280px; margin: 0 auto; padding: 20px 24px 60px; }

/* ---------- buttons & inputs ---------- */
.btn {
  font: inherit; border: 1px solid var(--border); background: var(--panel); color: var(--text);
  padding: 7px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--down); }
.btn.small { padding: 3px 10px; font-size: 13px; }
.btn:disabled { opacity: .6; cursor: wait; }

input, select, textarea {
  font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 10px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--primary) 35%, transparent); border-color: var(--primary); }
textarea { resize: vertical; min-height: 70px; }
input[type=color] { padding: 2px; width: 42px; height: 34px; }
input[type=checkbox] { width: auto; }
label { display: block; font-size: 13px; color: var(--muted); }
label > input, label > select, label > textarea { margin-top: 4px; }

/* ---------- toolbar & chips ---------- */
.toolbar { display: flex; gap: 10px; margin-bottom: 12px; }
.toolbar input { flex: 1; }
.toolbar select { width: 180px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 18px; }
.chip {
  border: 1px solid var(--border); background: var(--panel); color: var(--text); font: inherit; font-size: 13px;
  padding: 4px 12px; border-radius: 999px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
}
.chip.active { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 12%, var(--panel)); color: var(--primary); }
.swatch { width: 10px; height: 10px; border-radius: 3px; background: var(--c, var(--unknown)); display: inline-block; }

/* ---------- server cards ---------- */
.group { margin-bottom: 26px; }
.group-title { display: flex; align-items: center; gap: 8px; font-weight: 700; margin: 0 0 10px; font-size: 15px; }
.group-title .count { color: var(--muted); font-weight: 400; font-size: 13px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px;
  box-shadow: var(--shadow);
}
.server-card { cursor: pointer; transition: border-color .15s, transform .15s; position: relative; overflow: hidden; }
.server-card:hover { border-color: var(--primary); }
.server-card::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 0; width: 4px; background: var(--st); }
.card-head { display: flex; align-items: center; gap: 8px; }
.card-head .name { font-weight: 700; font-size: 15px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.server-card .host { color: var(--muted); margin: 2px 0 8px; }
.stats { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); }
.stats b { color: var(--text); font-weight: 500; }
.services-preview { margin-top: 8px; font-size: 12.5px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.due-line { margin-top: 10px; display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; border-top: 1px dashed var(--border); padding-top: 8px; }

.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--st); flex: none; }
.st-up { --st: var(--up); }
.st-down { --st: var(--down); }
.st-unknown { --st: var(--unknown); }
.st-paused { --st: var(--border); }
.st-down .dot, .dot.st-down { box-shadow: 0 0 0 0 var(--down); animation: pulse 1.6s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--down) 60%, transparent); } 100% { box-shadow: 0 0 0 8px transparent; } }

.tag { font-size: 12px; padding: 1px 8px; border-radius: 6px; background: color-mix(in srgb, var(--c) 15%, transparent); color: var(--c); white-space: nowrap; }
.badge { font-size: 12px; padding: 1px 8px; border-radius: 6px; background: var(--panel-2); white-space: nowrap; }
.badge.overdue { background: color-mix(in srgb, var(--down) 15%, transparent); color: var(--down); font-weight: 700; }
.badge.soon { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); font-weight: 700; }
.badge.near { background: color-mix(in srgb, var(--warn) 9%, transparent); color: var(--warn); }
.status-label { font-size: 12px; color: var(--st); font-weight: 500; }

.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty .btn { margin-top: 12px; }

/* ---------- tables ---------- */
.table-wrap { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 12px; text-align: start; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-weight: 500; color: var(--muted); font-size: 13px; background: var(--panel-2); }
tr:last-child td { border-bottom: 0; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--panel-2); }

/* ---------- events ---------- */
.event { display: flex; gap: 12px; align-items: flex-start; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.event:last-child { border-bottom: 0; }
.event .dot { margin-top: 7px; }
.event .when { margin-inline-start: auto; color: var(--muted); font-size: 12.5px; white-space: nowrap; }

/* ---------- modal ---------- */
.backdrop {
  position: fixed; inset: 0; background: rgba(10, 12, 20, .45); z-index: 50;
  display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto;
  animation: fade .12s ease-out;
}
@keyframes fade { from { opacity: 0; } }
.modal {
  background: var(--panel); border-radius: 14px; width: 100%; max-width: 720px; box-shadow: 0 20px 50px rgba(0,0,0,.25);
  border: 1px solid var(--border);
}
.modal.narrow { max-width: 460px; }
.modal-head { display: flex; align-items: center; gap: 10px; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-head h2 { margin: 0; font-size: 17px; flex: 1; }
.modal-body { padding: 18px 20px; }
.modal-foot { display: flex; gap: 8px; justify-content: flex-end; padding: 14px 20px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.x { background: none; border: 0; font-size: 22px; color: var(--muted); cursor: pointer; line-height: 1; padding: 4px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.form-grid .full { grid-column: 1 / -1; }
.form-section { grid-column: 1 / -1; font-weight: 700; font-size: 13.5px; margin-top: 8px; padding-top: 10px; border-top: 1px solid var(--border); color: var(--text); }
.form-section:first-child { border-top: 0; margin-top: 0; padding-top: 0; }
.hint { font-size: 12px; color: var(--muted); margin-top: 3px; }
.check-row { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

/* detail view */
.detail-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 12px; margin-bottom: 16px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }
.block-title { font-weight: 700; margin: 18px 0 8px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.prewrap { white-space: pre-wrap; background: var(--panel-2); padding: 10px 12px; border-radius: 8px; margin: 0; font-family: inherit; word-break: break-word; }
.history { display: flex; gap: 2px; height: 34px; align-items: stretch; }
.history span { flex: 1; border-radius: 2px; background: var(--panel-2); }
.history span.ok { background: var(--up); }
.history span.partial { background: var(--warn); }
.history span.bad { background: var(--down); }
.history-legend { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-top: 4px; }

/* settings */
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 16px; align-items: start; }
.settings-grid .card h3 { margin: 0 0 12px; font-size: 15px; }
.settings-grid .card .field { margin-bottom: 12px; }
.steps { margin: 0 0 14px; padding-inline-start: 18px; color: var(--muted); font-size: 13px; }
.cat-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.cat-row input[type=text] { flex: 1; }

/* toasts */
#toasts { position: fixed; bottom: 20px; left: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast { background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; box-shadow: 0 6px 20px rgba(0,0,0,.2); max-width: 360px; animation: fade .15s; }
.toast.error { background: var(--down); color: #fff; }

/* login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: 340px; display: flex; flex-direction: column; gap: 14px; box-shadow: var(--shadow); }
.login-card h1 { margin: 0; font-size: 20px; }
.login-card .err { color: var(--down); min-height: 1em; font-size: 13px; }

@media (max-width: 640px) {
  .topbar, .tabs { padding-inline: 16px; }
  main { padding: 16px; }
  .summary { order: 3; width: 100%; margin: 0; }
  .toolbar { flex-direction: column; }
  .toolbar select { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 110px 1fr; }
  .backdrop { padding: 0; }
  .modal { border-radius: 0; min-height: 100vh; }
}