/* Nebula Studio v3 — dual-theme monochrome system.
   Mono (default): Geist-style dark neutrals, action carried by contrast, not hue.
   Stone: warm light stone neutrals, near-black action.
   One accent = none; color belongs to status only. Tokens encode intent. */

:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-2: #191919;
  --surface-3: #232323;
  --field: #0f0f0f;
  --line: #242424;
  --line-strong: #343434;
  --ink: #ededed;
  --ink-2: #a1a1a1;
  --ink-3: #8a8a8a;
  --action: #ededed;          /* primary button surface */
  --action-ink: #0a0a0a;      /* text on primary */
  --action-hover: #ffffff;
  --action-down: #d4d4d4;
  --focus: #ededed;
  --wash: rgba(255, 255, 255, 0.07);
  --ok: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --ok-wash: rgba(52, 211, 153, 0.12);
  --warn-wash: rgba(251, 191, 36, 0.1);
  --bad-wash: rgba(248, 113, 113, 0.12);
  --shadow-pop: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-dock: 0 12px 32px rgba(0, 0, 0, 0.55);
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, sans-serif;
  --r: 8px;
  --r-lg: 12px;
}

:root[data-theme="stone"] {
  color-scheme: light;
  --bg: #fafaf9;
  --surface: #ffffff;
  --surface-2: #f5f5f4;
  --surface-3: #e7e5e4;
  --field: #ffffff;
  --line: #e7e5e4;
  --line-strong: #d6d3d1;
  --ink: #1c1917;
  --ink-2: #57534e;
  --ink-3: #6f6a64;
  --action: #1c1917;
  --action-ink: #fafaf9;
  --action-hover: #292524;
  --action-down: #0c0a09;
  --focus: #44403c;
  --wash: rgba(28, 25, 23, 0.06);
  --ok: #15803d;
  --warn: #a16207;
  --bad: #dc2626;
  --ok-wash: rgba(21, 128, 61, 0.1);
  --warn-wash: rgba(161, 98, 7, 0.1);
  --bad-wash: rgba(220, 38, 38, 0.08);
  --shadow-pop: 0 8px 24px rgba(28, 25, 23, 0.14), 0 0 0 1px rgba(28, 25, 23, 0.04);
  --shadow-dock: 0 12px 32px rgba(28, 25, 23, 0.16), 0 0 0 1px rgba(28, 25, 23, 0.04);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 15px/1.55 var(--sans);
}
::selection { background: var(--wash); }

h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: 22px; letter-spacing: -0.01em; }
h2 { font-size: 16px; }
h3 { font-size: 15px; }
p { margin: 0; }
a { color: var(--ink); text-decoration: none; }
a:hover { text-decoration: underline; }
a.quiet { color: var(--ink-2); }
a.quiet:hover { color: var(--ink); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.data { font-family: var(--mono); font-size: 13px; }
.muted { color: var(--ink-2); }
.small { font-size: 13px; }

svg.icon { width: 16px; height: 16px; flex: none; display: block; }

/* ---- buttons ---- */
.btn {
  appearance: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  font: 500 14px/1 var(--sans);
  padding: 9px 14px;
  border-radius: var(--r);
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  transition: background 150ms ease-out, border-color 150ms ease-out, color 150ms ease-out, transform 100ms ease-out;
}
.btn:hover { background: var(--surface-3); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { color: var(--ink-3); background: var(--surface); cursor: not-allowed; transform: none; }
.btn-primary { background: var(--action); border-color: var(--action); color: var(--action-ink); }
.btn-primary:hover { background: var(--action-hover); border-color: var(--action-hover); }
.btn-primary:active { background: var(--action-down); }
.btn-primary:disabled { background: var(--surface-3); border-color: var(--surface-3); color: var(--ink-3); }
.btn.loading { color: transparent; position: relative; }
.btn.loading::after {
  content: "";
  position: absolute; inset: 0; margin: auto;
  width: 14px; height: 14px;
  border: 2px solid var(--wash);
  border-top-color: var(--action-ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn:not(.btn-primary).loading::after { border-top-color: var(--ink); }
@keyframes spin { to { transform: rotate(1turn); } }

.btn-icon { padding: 8px; }

/* ---- forms ---- */
label.field { display: block; }
label.field > span, .field-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 6px;
}
input[type="text"], input[type="password"], input[type="number"], select, textarea {
  width: 100%;
  font: 400 14px/1.4 var(--sans);
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  padding: 8px 10px;
  transition: border-color 150ms ease-out;
}
input::placeholder, textarea::placeholder { color: var(--ink-3); }
input:focus, select:focus, textarea:focus { border-color: var(--focus); outline: none; box-shadow: 0 0 0 1px var(--focus); }
textarea { resize: vertical; }
input[type="number"] { font-family: var(--mono); font-size: 13px; }
input[type="range"] { width: 100%; accent-color: var(--ink); background: transparent; border: 0; padding: 0; }
input[type="range"]:focus { box-shadow: none; }
input[type="file"] { font-size: 13px; color: var(--ink-2); border: 0; background: none; padding: 0; }

/* ---- panels ---- */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); }

.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; vertical-align: 1px; }
.status-dot.ok { background: var(--ok); }
.status-dot.warn { background: var(--warn); }
.status-dot.bad { background: var(--bad); }

.banner-error {
  background: var(--bad-wash);
  border: 1px solid color-mix(in srgb, var(--bad) 40%, transparent);
  color: var(--ink);
  border-radius: var(--r);
  padding: 10px 14px;
  font-size: 13px;
}
.banner-error strong { color: var(--bad); }

/* ---- popover menus ---- */
.pop {
  position: absolute;
  min-width: 220px;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-pop);
  padding: 6px;
  z-index: 40;
  animation: pop-rise 150ms cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes pop-rise {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.pop-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.04em;
  color: var(--ink-3);
  padding: 6px 10px 4px;
}
.pop-item {
  appearance: none; border: 0; background: none;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--r);
  font: 400 14px/1.3 var(--sans);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: background 120ms ease-out;
}
.pop-item:hover { background: var(--surface-3); }
.pop-item .hint { color: var(--ink-3); font-family: var(--mono); font-size: 12px; }
.pop-item .tick { color: var(--ink); visibility: hidden; }
.pop-item[aria-checked="true"] .tick { visibility: visible; }
.pop-section { border-top: 1px solid var(--line); margin: 6px 0 0; padding: 8px 10px 6px; display: flex; flex-direction: column; gap: 10px; }

/* skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 37%, var(--surface-2) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--r);
}
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* the one authored moment: images resolve blur -> sharp */
.resolve-in { animation: resolve 250ms cubic-bezier(0.16, 1, 0.3, 1); }
@keyframes resolve {
  from { filter: blur(14px); opacity: 0.4; }
  to { filter: blur(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}