* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  height: 100%;
}
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #f5f0ff 0, #f5fbff 45%, #f0f4ff 100%);
  color: #111827;
}
.page {
  min-height: 100vh;
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-image {
  width: 32px;
  height: 32px;
}
.title-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.title {
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}
.subtitle {
  font-size: 0.9rem;
  color: #6b7280;
}
.badge {
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.08);
  color: #1d4ed8;
}
.main {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: flex-start;
}
.card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.2);
  padding: 18px 18px 20px;
  backdrop-filter: blur(14px);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.card-title {
  font-size: 0.98rem;
  font-weight: 600;
}
.card-subtitle {
  font-size: 0.8rem;
  color: #6b7280;
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}
.control {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.control-label {
  font-size: 0.82rem;
  color: #4b5563;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.control-label span {
  font-size: 0.7rem;
  color: #9ca3af;
}
select,
input[type="color"] {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  padding: 6px 9px;
  font-size: 0.82rem;
  color: #111827;
  background: #f9fafb;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
select:focus,
input[type="color"]:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
  background: #ffffff;
}
input[type="color"] {
  padding: 0;
  height: 32px;
}
.control-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.control-row input[type="color"] {
  flex: 0 0 32px;
}
.control-row select {
  flex: 1;
}
.buttons-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.btn {
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.82rem;
  border: 1px solid transparent;
  background: #e5e7eb;
  color: #111827;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.16s, box-shadow 0.16s, transform 0.08s, border-color 0.16s;
}
.btn-primary {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: #f9fafb;
  border-color: transparent;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.4);
}
.btn-ghost {
  background: rgba(249, 250, 251, 0.9);
  border-color: rgba(156, 163, 175, 0.5);
}
.btn:active {
  transform: translateY(1px);
  box-shadow: none;
}
.btn:hover {
  filter: brightness(1.02);
}
.btn-icon {
  font-size: 1rem;
}
.hint {
  font-size: 0.75rem;
  color: #9ca3af;
  margin-top: 8px;
}
.preview-wrapper {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
.preview-inner {
  background: radial-gradient(circle at top, #f9fafb 0, #e5e7eb 100%);
  border-radius: 20px;
  padding: 18px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7), 0 20px 40px rgba(15, 23, 42, 0.28);
}
.preview-canvas-shell {
  width: 256px;
  height: 256px;
  border-radius: 18px;
  overflow: hidden;
  background: #e5e7eb;
}
canvas {
  display: block;
  width: 256px;
  height: 256px;
}
.preview-size {
  font-size: 0.8rem;
  color: #6b7280;
}
.footer {
  margin-top: auto;
  font-size: 0.74rem;
  color: #9ca3af;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer a {
  color: #6b7280;
  text-decoration: none;
}
.footer a:hover {
  text-decoration: underline;
}
@media (max-width: 840px) {
  .page {
    padding-top: 18px;
  }
  .main {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 560px) {
  .card {
    padding: 14px 14px 16px;
  }
  .controls-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .preview-inner {
    padding: 14px;
  }
  .preview-canvas-shell {
    width: 220px;
    height: 220px;
  }
  canvas {
    width: 220px;
    height: 220px;
  }
}