:root {
  color-scheme: dark;
  --bg: #0f1117;
  --panel: #171a23;
  --border: #2a2f3d;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #7c3aed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

h1 {
  margin: 0;
  font-size: 1.25rem;
}

main {
  display: grid;
  grid-template-columns: minmax(320px, 480px) 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.controls,
.preview-pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.field > span {
  font-size: 0.85rem;
  color: var(--muted);
}

.row {
  display: flex;
  gap: 1rem;
}

.row .field {
  flex: 1;
}

textarea,
select,
input[type="range"] {
  width: 100%;
}

textarea,
select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font: inherit;
}

textarea {
  resize: vertical;
}

input[type="color"] {
  width: 100%;
  height: 2.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  padding: 0.15rem;
}

input[type="file"] {
  font-size: 0.8rem;
  color: var(--muted);
}

.mode-toggle {
  display: flex;
  gap: 1.25rem;
}

.mode-toggle label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin: 0;
}

legend {
  padding: 0 0.4rem;
  color: var(--muted);
  font-size: 0.85rem;
}

fieldset.disabled {
  opacity: 0.45;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.1rem;
  font: inherit;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.15);
}

#clear-logo {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  align-self: flex-end;
}

.preview-pane {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

#preview {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  line-height: 0;
  max-width: 100%;
  overflow: hidden;
}

#preview canvas,
#preview svg {
  max-width: 100%;
  height: auto !important;
}

.downloads {
  display: flex;
  gap: 0.75rem;
}

@media (max-width: 800px) {
  main {
    grid-template-columns: 1fr;
  }
}