:root {
  /* MCN brand: #0077C8 primary, #0060A8 dark, #3B9BDB mid, #E8F4FF light,
     #0A1628 / #030C18 navy. */
  --bg: #030C18;
  --bg-elev: #0A1628;
  --bg-elev-2: #12223a;
  --border: #1e3350;
  --text: #e8f0f8;
  --text-dim: #9fb2c6;
  --text-faint: #62788e;
  --accent: #3B9BDB;
  --accent-hover: #0077C8;
  --ok: #3fb950;
  --warn: #d29922;
  --err: #f85149;
  --radius: 10px;
  --radius-sm: 6px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) {
    --bg: #F5F8FC;
    --bg-elev: #ffffff;
    --bg-elev-2: #E8F4FF;
    --border: #D4DDE8;
    --text: #0A1628;
    --text-dim: #4a5f75;
    --text-faint: #7e93a8;
    --accent: #0077C8;
    --accent-hover: #0060A8;
    --ok: #1a7f37;
    --warn: #9a6700;
    --err: #cf222e;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ---------------------------------------------------------------- layout */

#app { height: 100%; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 52px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}

.topbar .brand {
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar .brand .logo { height: 22px; width: auto; display: block; }

/* The blue mark reads on light backgrounds, the white one on dark. Only one
   is ever shown; the other is hidden rather than loaded conditionally, so the
   theme can flip without a network round-trip. */
.logo-white { display: none; }
.logo-blue { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .logo-white { display: block; }
  :root:not([data-theme='light']) .logo-blue { display: none; }
}
:root[data-theme='dark'] .logo-white { display: block; }
:root[data-theme='dark'] .logo-blue { display: none; }

.brand-name {
  font-weight: 650;
  letter-spacing: 0.14em;
  font-size: 14px;
  color: var(--text-dim);
  border-left: 1px solid var(--border);
  padding-left: 10px;
  margin-left: 2px;
}

/* Logo lockup above the sign-in and setup forms. */
.auth-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.auth-mark .logo { height: 30px; width: auto; }
.auth-mark .brand-name { font-size: 15px; }

.topbar nav { display: flex; gap: 4px; }


/* --------------------------------------------------------------- buttons */

button, .btn {
  font: inherit;
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, opacity 0.12s;
  white-space: nowrap;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 550;
}
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

button.ghost { background: transparent; border-color: transparent; color: var(--text-dim); }
button.ghost:hover:not(:disabled) { background: var(--bg-elev-2); border-color: transparent; color: var(--text); }
button.ghost.active { background: var(--bg-elev-2); color: var(--text); }

button.danger { color: var(--err); border-color: transparent; background: transparent; }
button.danger:hover:not(:disabled) { background: color-mix(in srgb, var(--err) 14%, transparent); border-color: transparent; }

button.sm { padding: 4px 9px; font-size: 13px; }

/* ---------------------------------------------------------------- inputs */

input, select, textarea {
  font: inherit;
  font-size: 14px;
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: -1px;
  border-color: var(--accent);
}
textarea { resize: vertical; min-height: 70px; font-family: inherit; }
label { display: block; font-size: 13px; font-weight: 550; margin-bottom: 5px; }
.field { margin-bottom: 14px; }
.field .help { font-size: 12.5px; color: var(--text-faint); margin-top: 5px; line-height: 1.45; }
.field.inline { display: flex; align-items: center; gap: 9px; }
.field.inline input[type='checkbox'] { width: auto; margin: 0; }
.field.inline label { margin: 0; }

fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 4px;
  margin: 0 0 18px;
}
legend { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); padding: 0 6px; }

/* ----------------------------------------------------------------- cards */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 4px; font-size: 16px; }
.card h3 { margin: 0 0 10px; font-size: 14px; }
.card .sub { color: var(--text-dim); font-size: 13px; margin: 0 0 16px; }

/* ------------------------------------------------------------- centering */

.centered {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}
.centered .card { width: 100%; max-width: 420px; margin: 0; }

/* ------------------------------------------------------------ workspace */

.work { flex: 1; overflow-y: auto; padding: 22px 18px 60px; }
.work-inner { max-width: 760px; margin: 0 auto; }
.notebook-bar { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; font-size: 14px; }
.notebook-bar a { color: var(--accent); font-weight: 600; text-decoration: none; }
.notebook-bar a:hover { text-decoration: underline; }
.file-drop {
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  padding: 26px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  margin-bottom: 14px;
}
.file-drop.dragover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.notebook-select { width: auto; min-width: 220px; max-width: 100%; padding: 6px 10px; }
.check-list { display: flex; flex-direction: column; gap: 6px; max-height: 240px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; }
.check-row { display: flex; gap: 8px; align-items: center; font-weight: 400; cursor: pointer; margin: 0; }
.check-row input { width: auto; margin: 0; }
.history-head { font-size: 15px; margin: 26px 0 10px; }
#history { padding: 0; }
.sub-row { display: flex; gap: 12px; align-items: flex-start; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.sub-row:last-child { border-bottom: 0; }
.sub-row .kind { flex: 0 0 64px; font-size: 12px; color: var(--text-dim); padding-top: 2px; }
.sub-main { flex: 1; min-width: 0; }
.sub-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 550; }
.sub-error { color: var(--err); font-size: 12.5px; margin-top: 4px; word-break: break-word; }

/* ------------------------------------------------------- notebooklm panel */

table.kv { border-collapse: collapse; width: 100%; }
table.kv th { text-align: left; font-weight: 500; color: var(--text-dim); padding: 7px 14px 7px 0; width: 150px; vertical-align: middle; font-size: 13.5px; }
table.kv td { padding: 7px 0; }
pre.log {
  margin: 10px 0 0;
  max-height: 320px;
  overflow: auto;
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  white-space: pre-wrap;
  word-break: break-word;
}
iframe.vnc { width: 100%; height: 680px; border: 1px solid var(--border); border-radius: 8px; margin-top: 12px; background: #000; }

/* ----------------------------------------------------------------- admin */

.admin { flex: 1; overflow-y: auto; padding: 22px 18px 60px; }
.admin-inner { max-width: 980px; margin: 0 auto; }
.admin h1 { font-size: 20px; margin: 0 0 18px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; flex-wrap: wrap; }
.tabs button {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  color: var(--text-dim);
  padding: 9px 13px;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
.tabs button:hover:not(:disabled) { color: var(--text); border-color: transparent; border-bottom-color: var(--border); }
.tabs button.active:hover { border-bottom-color: var(--accent); }

table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  padding: 0 10px 8px;
  font-weight: 600;
}
table.data td { padding: 10px; border-top: 1px solid var(--border); vertical-align: middle; }
table.data tr:hover td { background: var(--bg-elev-2); }
table.data .actions { text-align: right; white-space: nowrap; }
.table-wrap { overflow-x: auto; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 99px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-faint); }
.badge.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.badge.ok .dot { background: var(--ok); }
.badge.err { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }
.badge.err .dot { background: var(--err); }
.badge.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.badge.warn .dot { background: var(--warn); }

.notice {
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 13.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  border: 1px solid;
}
.notice strong { display: block; margin-bottom: 5px; font-size: 13.5px; }
.notice.warning { background: color-mix(in srgb, var(--warn) 10%, transparent); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.notice.info { background: color-mix(in srgb, var(--accent) 9%, transparent); border-color: color-mix(in srgb, var(--accent) 32%, transparent); }
.notice.error { background: color-mix(in srgb, var(--err) 10%, transparent); border-color: color-mix(in srgb, var(--err) 40%, transparent); color: var(--err); }
.notice.success { background: color-mix(in srgb, var(--ok) 10%, transparent); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }

.kv-row { display: flex; gap: 8px; margin-bottom: 7px; }
.kv-row input { flex: 1; }

.test-steps { margin-top: 14px; }
.test-step {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  align-items: flex-start;
}
.test-step .icon { flex: 0 0 18px; font-weight: 700; }
.test-step.ok .icon { color: var(--ok); }
.test-step.fail .icon { color: var(--err); }
.test-step .name { flex: 0 0 190px; font-weight: 550; }
.test-step .detail { flex: 1; color: var(--text-dim); overflow-wrap: anywhere; }
.test-step .ms { color: var(--text-faint); font-variant-numeric: tabular-nums; }

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.row.between { justify-content: space-between; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

.mono { font-family: var(--mono); font-size: 13px; }
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.empty { text-align: center; color: var(--text-faint); padding: 44px 18px; font-size: 14px; }

/* ---------------------------------------------------------------- modal */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  overflow-y: auto;
  z-index: 50;
}
.modal {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 620px;
  padding: 20px;
}
.modal.wide { max-width: 820px; }
.modal h2 { margin: 0 0 16px; font-size: 17px; }

/* ---------------------------------------------------------------- toast */

#toasts { position: fixed; bottom: 18px; right: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 13.5px;
  max-width: 380px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
  animation: slidein 0.18s ease-out;
}
.toast.error { border-left-color: var(--err); }
.toast.success { border-left-color: var(--ok); }
@keyframes slidein { from { transform: translateX(14px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------------------------------------------------------------- mobile */

@media (max-width: 760px) {
  .topbar { padding: 0 12px; gap: 8px; }
  .topbar .brand span { display: none; }
  .work { padding: 16px 12px 50px; }
  .admin { padding: 16px 12px 50px; }
  .grid2 { grid-template-columns: 1fr; }
  .test-step { flex-wrap: wrap; }
  .test-step .name { flex: 1 1 100%; }
  #toasts { left: 12px; right: 12px; bottom: 12px; }
  .toast { max-width: none; }
}