:root {
  --bg: 243 244 248;
  --card: 255 255 255;
  --ink: 17 24 39;
  --muted: 107 114 128;
  --border: 226 229 235;
  --accent: 79 70 229;
  --accent-soft: 238 237 253;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  background: rgb(var(--bg));
  color: rgb(var(--ink));
  font-family: 'Inter', system-ui, sans-serif;
}

.page {
  width: 100%;
  max-width: 760px;
}

.page-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgb(var(--accent));
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.page-title {
  font-family: 'Sora', sans-serif;
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-lede {
  font-size: 0.88rem;
  color: rgb(var(--muted));
  margin-bottom: 1.75rem;
}

/* ---------- Layout ---------- */
.studio {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.preview-panel {
  position: sticky;
  top: 1.5rem;
}

.qr-card {
  position: relative;
  overflow: hidden;
  background: rgb(var(--card));
  border: 1px solid rgb(var(--border));
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px -28px rgb(15 23 42 / 0.25);
}

.qr-card canvas {
  width: 100%;
  height: auto;
  display: block;
}

.scan-sweep {
  position: absolute;
  left: 0;
  right: 0;
  height: 26%;
  top: -30%;
  background: linear-gradient(
    180deg,
    transparent,
    rgb(var(--accent) / 0.16) 45%,
    rgb(var(--accent) / 0.3) 50%,
    rgb(var(--accent) / 0.16) 55%,
    transparent
  );
  animation: sweep 3.2s linear infinite;
  pointer-events: none;
}

@keyframes sweep {
  0% {
    top: -30%;
  }
  100% {
    top: 104%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scan-sweep {
    display: none;
  }
}

.qr-hint {
  margin-top: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: rgb(var(--muted));
  text-align: center;
}

.export-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.export-btn {
  flex: 1;
  padding: 0.6rem 0.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgb(var(--ink));
  background: rgb(var(--card));
  border: 1px solid rgb(var(--border));
  border-radius: 8px;
  cursor: pointer;
  transition:
    border-color 150ms ease,
    transform 150ms var(--ease-out-quad);
}

.export-btn:hover {
  border-color: rgb(var(--accent) / 0.5);
  color: rgb(var(--accent));
}

.export-btn:active {
  transform: scale(0.97);
}

/* ---------- Controls panel ---------- */
.controls-panel {
  background: rgb(var(--card));
  border: 1px solid rgb(var(--border));
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: 0 20px 40px -28px rgb(15 23 42 / 0.2);
}

.control-group + .control-group {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgb(var(--border));
}

.control-group h2 {
  font-family: 'Sora', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.type-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.type-tab {
  padding: 0.4rem 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgb(var(--muted));
  background: rgb(var(--bg));
  border: 1px solid rgb(var(--border));
  border-radius: 999px;
  cursor: pointer;
  transition:
    background-color 150ms ease,
    color 150ms ease,
    border-color 150ms ease;
}

.type-tab.is-active {
  background: rgb(var(--accent-soft));
  border-color: rgb(var(--accent) / 0.4);
  color: rgb(var(--accent));
}

.type-fields {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.type-fields.is-hidden {
  display: none;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgb(var(--muted));
}

.field input,
.field select,
.field textarea {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  color: rgb(var(--ink));
  background: rgb(var(--bg));
  border: 1px solid rgb(var(--border));
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  outline: none;
  transition: border-color 150ms ease;
}

.field textarea {
  resize: vertical;
  min-height: 60px;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgb(var(--accent) / 0.6);
}

.style-row {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 0.85rem;
}

.color-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgb(var(--muted));
}

.color-field input[type='color'] {
  width: 44px;
  height: 30px;
  padding: 0;
  border: 1px solid rgb(var(--border));
  border-radius: 6px;
  cursor: pointer;
  background: none;
}

.logo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgb(var(--muted));
}

.logo-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-row input[type='file'] {
  font-size: 0.72rem;
  color: rgb(var(--muted));
  max-width: 130px;
}

.logo-clear {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgb(var(--accent));
  background: none;
  border: none;
  cursor: pointer;
}

.logo-clear.is-hidden {
  display: none;
}

@media (max-width: 640px) {
  .studio {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    position: static;
  }
}