:root {
  color-scheme: light;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f6f8;
  color: #1f2430;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f5f6f8;
}

body.auth-locked {
  overflow: hidden;
}

.hero {
  padding: 2.5rem 1.5rem 1.5rem;
  background: linear-gradient(135deg, #fefefe 0%, #eef1f6 100%);
  border-bottom: 1px solid #e1e4ea;
}

.hero h1 {
  margin: 0.4rem 0 0.8rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.eyebrow {
  font-size: 0.85rem;
  color: #5b6577;
}

.lead {
  margin: 0;
  max-width: 640px;
  color: #394153;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel {
  background: #ffffff;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 12px 30px rgba(36, 52, 86, 0.08);
}

.status {
  display: none;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: #fff3f3;
  color: #a31212;
  border: 1px solid #f1b2b2;
  font-size: 0.95rem;
}

.status.visible {
  display: block;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem;
  border: 1px dashed #ccd3e0;
  border-radius: 12px;
  background: #fafbfe;
}

.card input {
  margin-top: 0.4rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.field input[type="number"] {
  padding: 0.5rem 0.6rem;
  border-radius: 10px;
  border: 1px solid #ccd3e0;
  font-size: 0.95rem;
}

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

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.6rem;
  font-size: 0.95rem;
}

.hint {
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: #5b6577;
}

.stamp-preview {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.stamp-preview canvas {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  border: 1px solid #e1e4ea;
  background: repeating-linear-gradient(
    45deg,
    #f8f8f8,
    #f8f8f8 8px,
    #f1f1f1 8px,
    #f1f1f1 16px
  );
}

.caption {
  margin: 0;
  font-size: 0.85rem;
  color: #5b6577;
}

.preview {
  position: relative;
  width: 100%;
  min-height: 420px;
  border: 1px solid #e1e4ea;
  border-radius: 16px;
  background: #fdfdfd;
  overflow: hidden;
}

.preview canvas {
  display: block;
  width: 100%;
}

#overlayCanvas {
  position: absolute;
  inset: 0;
  cursor: grab;
  touch-action: none;
}

#overlayCanvas.dragging {
  cursor: grabbing;
}

.actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

button {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
  cursor: pointer;
}

button.primary {
  background: #d62222;
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(214, 34, 34, 0.3);
}

button.primary:disabled {
  background: #f1b2b2;
  cursor: not-allowed;
  box-shadow: none;
}

button.ghost {
  background: #eef1f6;
  color: #31394a;
}

.footer {
  padding: 2rem 1.5rem;
  text-align: center;
  color: #6a7486;
  font-size: 0.85rem;
}

.password-gate {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, #fff5f0, #f5f6f8 55%, #eef1f6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 9999;
}

.password-gate.hidden {
  display: none;
}

.password-card {
  width: min(420px, 92vw);
  background: #ffffff;
  border-radius: 18px;
  padding: 1.6rem;
  box-shadow: 0 16px 40px rgba(36, 52, 86, 0.15);
}

.password-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
}

.password-sub {
  margin: 0 0 1.2rem;
  color: #5b6577;
  font-size: 0.95rem;
}

.password-field {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.password-field input {
  flex: 1;
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
  border: 1px solid #ccd3e0;
  font-size: 1rem;
}

.password-field input:disabled {
  background: #f4f6f9;
}

.password-message {
  min-height: 1.2rem;
  margin: 0.8rem 0 0;
  color: #a31212;
  font-size: 0.92rem;
}

.password-remaining {
  margin: 0.4rem 0 0;
  color: #5b6577;
  font-size: 0.85rem;
}

@media (max-width: 720px) {
  .container {
    padding: 1rem;
  }

  .panel {
    padding: 1.2rem;
  }

  .preview {
    min-height: 320px;
  }
}