:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #647089;
  --border: #d8deea;
  --accent: #1746a2;
  --accent-strong: #0e3278;
  --surface: #eef3fb;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.app {
  min-height: 100vh;
  padding: 24px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  gap: 24px;
  max-width: 1440px;
  margin: 0 auto;
}

.controls,
.preview {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 18px 45px rgba(23, 32, 51, 0.08);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-height: calc(100vh - 48px);
  padding: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.02;
  letter-spacing: 0;
}

.dropzone {
  display: grid;
  place-items: center;
  min-height: 150px;
  padding: 22px;
  border: 2px dashed #9aabc9;
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: #e7effc;
  transform: translateY(-1px);
}

.dropzone input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.drop-title {
  display: block;
  color: var(--ink);
  font-weight: 800;
}

.drop-subtitle {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.settings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.settings label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.settings input[type="number"],
.settings input[type="color"],
.settings select {
  width: 100%;
  height: 42px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  padding: 8px 10px;
}

.settings input[type="color"] {
  padding: 4px;
}

.settings .checkbox {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 42px;
  color: var(--ink);
}

.settings .checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button {
  min-height: 44px;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--accent-strong);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

#copySvg {
  background: #ffffff;
  border-color: var(--border);
  color: var(--ink);
}

#copySvg:hover:not(:disabled) {
  background: #f4f7fc;
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0;
}

.stats div {
  border: 1px solid var(--border);
  background: #fbfcff;
  padding: 12px;
}

.stats dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.stats dd {
  margin: 5px 0 0;
  font-size: 18px;
  font-weight: 850;
}

.message {
  min-height: 22px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.message.error {
  color: var(--danger);
}

.preview {
  display: grid;
  min-height: calc(100vh - 48px);
  padding: 24px;
  align-items: center;
}

.svg-preview {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 360px;
  overflow: auto;
  border: 1px solid var(--border);
  background:
    linear-gradient(45deg, #f2f5fa 25%, transparent 25%),
    linear-gradient(-45deg, #f2f5fa 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f2f5fa 75%),
    linear-gradient(-45deg, transparent 75%, #f2f5fa 75%);
  background-color: #fff;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
}

.svg-preview p {
  color: var(--muted);
  font-weight: 700;
}

.svg-preview svg {
  display: block;
  width: min(100%, 1200px);
  height: auto;
}

@media (max-width: 860px) {
  .app {
    padding: 14px;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .controls,
  .preview {
    min-height: auto;
    padding: 18px;
  }
}

@media (max-width: 520px) {
  .settings,
  .actions,
  .stats {
    grid-template-columns: 1fr;
  }
}