:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light dark;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #18202a;
  --muted: #647184;
  --border: #dce1e8;
  --accent: #168acd;
  --success: #229a53;
  --danger: #c93f4d;
  --shadow: 0 12px 30px rgba(30, 45, 65, .08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1218;
    --panel: #171d26;
    --text: #edf2f8;
    --muted: #9ba8b7;
    --border: #303947;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

button, input, textarea, select { font: inherit; }

button, input, textarea, select {
  border: 1px solid var(--border);
  border-radius: 12px;
}

input, textarea, select {
  width: 100%;
  padding: 11px 12px;
  background: var(--panel);
  color: var(--text);
}

textarea { resize: vertical; line-height: 1.7; }

button {
  cursor: pointer;
  padding: 10px 14px;
  background: var(--panel);
  color: var(--text);
}

button:disabled { cursor: not-allowed; opacity: .55; }

button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
  outline-offset: 2px;
}

.shell {
  width: min(920px, calc(100% - 28px));
  margin: 28px auto 60px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: clamp(1.5rem, 4vw, 2.2rem); }
h2 { margin-bottom: 6px; font-size: 1.1rem; }

.eyebrow {
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  margin-bottom: 7px;
}

.muted { color: var(--muted); margin-bottom: 0; }

.identity {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  font-size: .85rem;
}

.identity a { color: var(--accent); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.grid {
  display: grid;
  gap: 14px;
}

.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.full { grid-column: 1 / -1; }

label > span {
  display: block;
  margin-bottom: 7px;
  font-size: .9rem;
  font-weight: 650;
}

.section-heading, .button-editor-head, .actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.secondary { color: var(--accent); }

.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  min-width: 180px;
  font-weight: 750;
}

.editor-list { display: grid; gap: 12px; }

.button-editor {
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 14px;
}

.button-editor-head { margin-bottom: 12px; }

.mini-actions { display: flex; gap: 7px; }
.mini-actions button { padding: 6px 9px; font-size: .84rem; }
.danger-text { color: var(--danger); }

.switch-row {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 15px;
}

.switch-row input { width: auto; }
.switch-row span { margin: 0; }

.preview { display: grid; gap: 8px; }

.preview-row {
  display: grid;
  gap: 8px;
}

.preview-button {
  padding: 11px;
  text-align: center;
  border-radius: 11px;
  border: 1px solid var(--border);
}

.preview-button[data-style="primary"] {
  background: color-mix(in srgb, var(--accent) 22%, var(--panel));
}

.preview-button[data-style="success"] {
  background: color-mix(in srgb, var(--success) 22%, var(--panel));
}

.preview-button[data-style="danger"] {
  background: color-mix(in srgb, var(--danger) 22%, var(--panel));
}

.actions {
  position: sticky;
  bottom: 12px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  padding: 12px;
  border-radius: 16px;
}

#status { color: var(--muted); font-size: .9rem; }
#status.success { color: var(--success); }
#status.error { color: var(--danger); }

@media (max-width: 680px) {
  .topbar, .section-heading, .actions { align-items: stretch; flex-direction: column; }
  .identity { align-items: flex-start; }
  .grid.two { grid-template-columns: 1fr; }
  .full { grid-column: auto; }
  .primary { width: 100%; }
}