:root {
  --mono: #e8e8e8;
  --muted: #9a9a9a;
  --line: #2a2a2a;
  --panel: #141414;
  --accent: #d0d0d0;
  --template-active: #2c2c2c;
}

body {
  background: #0d0d0d;
  color: var(--mono);
  min-height: 100vh;
}

.navbar {
  background: #111 !important;
}

.navbar-brand {
  color: var(--mono) !important;
  letter-spacing: 0.02em;
}

.letter-space {
  letter-spacing: 0.08em;
  font-size: 0.72rem !important;
}

.tracking-tight {
  letter-spacing: -0.01em;
}

.template-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.85rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  height: 100%;
  user-select: none;
}

.template-card:hover {
  border-color: #444;
  background: #181818;
}

.template-card.active {
  border-color: #777;
  background: var(--template-active);
}

.template-card .tpl-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.template-card .tpl-meta {
  color: var(--muted);
  font-size: 0.78rem;
}

.section-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 0.9rem 1rem 1rem;
}

.section-block .section-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.form-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.form-control,
.form-select {
  background-color: #0f0f0f;
  border-color: #333;
  color: var(--mono);
}

.form-control:focus,
.form-select:focus {
  background-color: #0f0f0f;
  border-color: #666;
  color: var(--mono);
  box-shadow: 0 0 0 0.2rem rgba(180, 180, 180, 0.15);
}

.form-control::placeholder {
  color: #555;
}

.preview-shell {
  background: #111;
  position: sticky;
  top: 0.75rem;
}

.preview-area {
  position: relative;
  height: min(78vh, 920px);
  background: #1a1a1a;
}

.preview-area iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: #1a1a1a;
}

.preview-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

kbd {
  background: #222;
  border: 1px solid #444;
  border-radius: 0.25rem;
  padding: 0.05rem 0.35rem;
  font-size: 0.75rem;
  color: #ccc;
}

.btn-light {
  --bs-btn-bg: #e4e4e4;
  --bs-btn-border-color: #e4e4e4;
  --bs-btn-hover-bg: #fff;
  --bs-btn-hover-border-color: #fff;
  --bs-btn-color: #111;
  --bs-btn-hover-color: #111;
}

.form-check-input:checked {
  background-color: #888;
  border-color: #888;
}

@media (max-width: 1199.98px) {
  .preview-shell {
    position: static;
  }

  .preview-area {
    height: 70vh;
  }
}