:root {
  --surface-bg: var(--theme-surface-bg, #151020);
  --surface-ink: var(--theme-surface-bg, #151020);
  --surface-ink-2: var(--theme-surface-bg-deep, #0f0b18);
  --surface-panel: var(--theme-surface-bg-soft, #1d162a);
  --surface-panel-soft: var(--theme-surface-bg-soft-2, #241b34);
  --surface-text: var(--theme-surface-text, #fff5e4);
  --surface-muted: var(--theme-surface-muted, #d8c8b0);
  --surface-muted-2: var(--theme-surface-muted-2, #a38f7d);
  --surface-line: var(--theme-surface-line, rgba(255, 245, 228, 0.14));
  --surface-line-strong: var(--theme-surface-line-strong, rgba(255, 245, 228, 0.22));
  --surface-accent: var(--theme-surface-accent, #ff8b2f);
  --surface-accent-cool: var(--theme-surface-accent-cool, #8398eb);
  --surface-accent-rose: var(--theme-surface-accent-rose, #cb8ea0);
  --surface-success: var(--theme-surface-success, #93c489);
  --surface-danger: var(--theme-surface-danger, #db8372);
  --surface-shadow: var(--theme-surface-shadow, rgba(0, 0, 0, 0.34));
  --surface-page-background: var(
    --theme-surface-page-background,
    linear-gradient(180deg, #151020 0%, #100b18 100%)
  );
  --surface-stage-background:
    linear-gradient(180deg, rgba(255, 245, 228, 0.03), transparent 18%),
    linear-gradient(
      180deg,
      var(--theme-surface-stage-top, #171122) 0%,
      var(--theme-surface-stage-bottom, #0f0b18) 100%
    );
  --surface-font-display: var(
    --theme-surface-font-display,
    "P22 Typewriter",
    "American Typewriter",
    "IBM Plex Mono",
    "Courier New",
    serif
  );
  --surface-font-body: var(
    --theme-surface-font-body,
    "IBM Plex Mono",
    "Courier Prime",
    "Courier New",
    monospace
  );
  --surface-font-literary: var(
    --theme-surface-font-literary,
    "EB Garamond",
    "Iowan Old Style",
    Georgia,
    serif
  );
  --surface-page-width: var(--theme-surface-page-width, min(1560px, calc(100vw - 24px)));
  --surface-page-pad-y: var(--theme-surface-page-pad-y, 18px);
  --surface-gap: var(--theme-surface-gap, 18px);
  --surface-type-heading: calc(7 * var(--bb-shell-mm-scale));
  --surface-type-sub: calc(3 * var(--bb-shell-mm-scale));
  --surface-type-body: calc(2.5 * var(--bb-shell-mm-scale));
  --surface-type-kicker: calc(2.5 * var(--bb-shell-mm-scale));
  --surface-type-meta: calc(2 * var(--bb-shell-mm-scale));
}

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

body {
  background: var(--surface-page-background);
  color: var(--surface-text);
  font-family: var(--surface-font-body);
}

.surface-shell {
  width: var(--surface-page-width);
  margin: 0 auto;
  padding: var(--surface-page-pad-y) 0 28px;
}

.surface-section {
  position: relative;
  padding-top: 14px;
  border-top: 1px solid var(--surface-line);
}

.surface-section--dense {
  padding-top: 10px;
}

.surface-grid {
  display: grid;
  gap: var(--surface-gap);
}

.surface-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.surface-kicker {
  margin: 0 0 6px;
  color: var(--surface-accent-cool);
  font-family: var(--surface-font-display);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.surface-title {
  margin: 0;
  color: var(--surface-text);
  font-family: var(--surface-font-display);
  font-size: 1.12rem;
  line-height: 1.08;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.surface-title--literary {
  font-family: var(--surface-font-literary);
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 0.98;
  letter-spacing: 0;
  text-transform: none;
}

.surface-dek,
.surface-note {
  margin: 6px 0 0;
  color: var(--surface-muted);
  font-size: 14px;
  line-height: 1.5;
}

.surface-head--compact {
  gap: 8px;
}

.surface-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.surface-button,
.surface-pill,
.surface-chip,
.surface-stage,
.surface-panel,
.surface-field input,
.surface-field select,
.surface-field textarea {
  border: 1px solid var(--surface-line-strong);
  border-radius: 8px;
}

.surface-button {
  min-height: 42px;
  padding: 0 14px;
  background: rgba(255, 245, 228, 0.04);
  color: var(--surface-text);
  cursor: pointer;
  font-family: var(--surface-font-display);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

.surface-button:hover,
.surface-pill:hover,
.surface-chip:hover {
  transform: translateY(-1px);
}

.surface-button--primary {
  background:
    linear-gradient(180deg, rgba(255, 245, 228, 0.16), transparent 18%),
    linear-gradient(180deg, color-mix(in srgb, var(--surface-accent) 88%, #ffd1ac 12%), var(--surface-accent));
  border-color: color-mix(in srgb, var(--surface-accent) 68%, white 32%);
  color: #180f0f;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.22);
}

.surface-button--ghost {
  background: transparent;
}

.surface-button--danger {
  border-color: rgba(219, 131, 114, 0.4);
  background: rgba(219, 131, 114, 0.12);
  color: #ffe3dd;
}

.surface-button--bitbord {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 245, 228, 0.08), rgba(255, 245, 228, 0.02)),
    linear-gradient(160deg, rgba(131, 152, 235, 0.12), rgba(255, 139, 47, 0.14));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -2px 0 rgba(0, 0, 0, 0.28),
    0 8px 16px rgba(0, 0, 0, 0.18);
}

.surface-button--bitbord::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 26% 18%, rgba(255, 255, 255, 0.12), transparent 24%),
    linear-gradient(180deg, rgba(255, 245, 228, 0.08), transparent 48%);
  opacity: 0.92;
  pointer-events: none;
}

.surface-button--bitbord::after {
  content: "";
  position: absolute;
  left: 14%;
  right: 14%;
  bottom: 8%;
  height: 10%;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.28);
  filter: blur(7px);
  opacity: 0.8;
  pointer-events: none;
  transition: transform 120ms ease, opacity 120ms ease;
}

.surface-button--bitbord:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    inset 0 -2px 0 rgba(0, 0, 0, 0.32),
    0 12px 20px rgba(0, 0, 0, 0.24),
    0 0 12px rgba(255, 139, 47, 0.12);
}

.surface-button--bitbord:active,
.surface-button--bitbord.is-pressed,
.surface-button--bitbord.is-active {
  transform: translateY(1px) scale(0.985);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.12),
    inset 0 -1px 0 rgba(0, 0, 0, 0.18),
    0 4px 10px rgba(0, 0, 0, 0.18);
}

.surface-button--bitbord:active::after,
.surface-button--bitbord.is-pressed::after,
.surface-button--bitbord.is-active::after {
  transform: translateY(3px) scale(0.94);
  opacity: 0.52;
}

.surface-chip,
.surface-pill {
  padding: 5px 9px;
  background: #261f34;
  font-size: 12px;
}

.surface-panel {
  padding: 14px;
  background: #1c1629;
}

.surface-stage {
  overflow: auto;
  border-top: 1px solid rgba(255, 245, 228, 0.12);
  border-bottom: 1px solid rgba(255, 245, 228, 0.08);
  border-left: 0;
  border-right: 0;
  border-radius: 0;
  background: var(--surface-stage-background);
}

.surface-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.surface-field label,
.surface-field span {
  color: var(--surface-muted-2);
  font-family: var(--surface-font-display);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.surface-field input,
.surface-field select,
.surface-field textarea {
  width: 100%;
  min-height: 40px;
  padding: 9px 11px;
  background: rgba(7, 5, 12, 0.48);
  color: var(--surface-text);
}

.surface-field textarea {
  min-height: 92px;
  resize: vertical;
}

.surface-code {
  margin: 14px 0 0;
  padding: 16px;
  max-height: 420px;
  overflow: auto;
  border: 1px solid var(--surface-line);
  border-radius: 8px;
  background: #0c0912;
  color: #d9eee4;
  font-family: "IBM Plex Mono", "SF Mono", monospace;
  font-size: 12px;
  line-height: 1.5;
}

.surface-divider-left {
  border-left: 1px solid var(--surface-line);
}

.surface-meta {
  color: var(--surface-muted);
  font-size: 14px;
  line-height: 1.5;
}

.surface-kicker {
  margin: 0 0 8px;
  color: var(--surface-accent-cool);
  font-family: var(--surface-font-display);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.surface-title {
  margin: 0;
  font-family: var(--surface-font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.06;
  text-transform: uppercase;
}

.u-mono {
  font-family: "IBM Plex Mono", "SF Mono", monospace;
}