/* QR Code 生成器 - 左右布局 + 渐变配色 */

.qr-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.qr-left { display: flex; flex-direction: column; gap: 16px; }
.qr-right { position: sticky; top: 20px; }

/* 模式切换 */
.mode-tabs {
  display: flex; gap: 6px;
  background: var(--bg-card); padding: 4px;
  border-radius: 10px; border: 1px solid var(--border);
}

.mode-tab {
  flex: 1; padding: 10px 16px; border: none; border-radius: 8px;
  background: transparent; color: var(--text-secondary);
  font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.2s;
}

.mode-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.mode-tab.active { background: var(--accent); color: #000; font-weight: 600; }

/* 输入 */
.input-section label { display: block; color: var(--text-secondary); font-size: 13px; margin-bottom: 6px; }

.input-section textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-card); color: var(--text-primary);
  font-size: 14px; font-family: inherit; outline: none;
  resize: vertical; min-height: 80px; transition: border-color 0.2s;
}

.input-section textarea:focus { border-color: var(--accent); }
.input-section textarea::placeholder { color: var(--text-secondary); opacity: 0.5; }

/* 上传 */
.upload-area {
  border: 2px dashed var(--border); border-radius: 10px;
  padding: 24px; text-align: center; cursor: pointer; transition: all 0.3s;
}

.upload-area:hover, .upload-area.drag-over { border-color: var(--accent); background: rgba(251,191,36,0.05); }
.upload-icon { font-size: 32px; margin-bottom: 4px; }
.upload-content p { color: var(--text-secondary); margin-bottom: 2px; font-size: 14px; }
.upload-hint { font-size: 12px; }
.file-name { color: var(--accent); font-size: 13px; margin-top: 6px; text-align: center; }

/* 配色区 */
.style-section {
  background: var(--bg-card); padding: 16px;
  border-radius: 12px; border: 1px solid var(--border);
}

.section-label {
  display: block; color: var(--text-secondary);
  font-size: 13px; font-weight: 500; margin-bottom: 10px;
}

.preset-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 6px; margin-bottom: 14px;
}

.preset-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 6px; border: 2px solid var(--border); border-radius: 8px;
  background: var(--bg-primary); cursor: pointer; transition: all 0.2s;
}

.preset-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.preset-btn.active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

.preset-swatch { width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--border); }
.preset-label { font-size: 10px; color: var(--text-secondary); font-weight: 500; }
.preset-btn.active .preset-label { color: var(--accent); }

/* 渐变自定义 */
.gradient-custom { margin-bottom: 12px; }

.gradient-row { display: flex; gap: 12px; margin-bottom: 10px; }
.gradient-group { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.gradient-label { font-size: 12px; color: var(--text-secondary); }
.gradient-inputs { display: flex; align-items: center; gap: 6px; }

.gradient-inputs input[type="color"] {
  width: 30px; height: 30px; border: 2px solid var(--border);
  border-radius: 6px; cursor: pointer; background: none; padding: 2px;
}

.gradient-inputs input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.gradient-inputs input[type="color"]::-webkit-color-swatch { border: none; border-radius: 3px; }
.gradient-inputs span { color: var(--text-secondary); font-size: 12px; }

.option-row.compact { display: flex; gap: 12px; }
.option-group { flex: 1; }
.option-group label { display: block; color: var(--text-secondary); font-size: 12px; margin-bottom: 4px; }

select {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg-primary); color: var(--text-primary);
  font-size: 13px; outline: none; cursor: pointer;
}

select:focus { border-color: var(--accent); }

.btn-generate {
  width: 100%; padding: 12px; border: none; border-radius: 10px;
  background: var(--accent); color: #000; font-size: 15px;
  font-weight: 600; cursor: pointer; transition: all 0.2s; margin-top: 4px;
}

.btn-generate:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-generate:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* 结果预览 */
.result-card {
  background: var(--bg-card); border-radius: 16px; border: 1px solid var(--border);
  padding: 32px; text-align: center; min-height: 300px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}

.result-placeholder { color: var(--text-secondary); opacity: 0.5; }
.placeholder-icon { font-size: 64px; margin-bottom: 12px; }
.result-placeholder p { font-size: 14px; }

.qr-preview {
  display: inline-block; padding: 12px; background: #fff;
  border-radius: 12px; margin-bottom: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}

.qr-preview img { display: block; max-width: 100%; height: auto; border-radius: 8px; }

.result-actions { display: flex; gap: 10px; justify-content: center; margin-bottom: 10px; }

.btn-action {
  padding: 8px 20px; border: 1px solid var(--border); border-radius: 8px;
  background: transparent; color: var(--text-primary);
  font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.2s;
}

.btn-action:hover { border-color: var(--accent); color: var(--accent); }
.btn-download { border-color: var(--success); color: var(--success); }
.btn-download:hover { background: var(--success); color: #000; }
.result-info { color: var(--text-secondary); font-size: 12px; }

/* 头部 */
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 0; margin-bottom: 20px; border-bottom: 1px solid var(--border);
}

.header-left { display: flex; align-items: center; gap: 12px; }
.header-right { display: flex; align-items: center; gap: 12px; }
.brand-icon { font-size: 28px; }
header h1 { font-size: 18px; color: var(--accent); }

.btn-back {
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: transparent; color: var(--text-secondary); text-decoration: none;
  font-size: 13px; transition: all 0.2s;
}
.btn-back:hover { border-color: var(--accent); color: var(--accent); }

.btn-logout {
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: transparent; color: var(--text-secondary); cursor: pointer;
  font-size: 13px; transition: all 0.2s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* 通知 */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  padding: 10px 20px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text-primary); font-size: 13px;
  z-index: 2000; animation: fadeInUp 0.3s ease;
}
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error { border-color: var(--danger); color: var(--danger); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* 响应式 */
@media (max-width: 768px) {
  .qr-layout { grid-template-columns: 1fr; gap: 16px; }
  .qr-right { position: static; order: -1; }
  .result-card { min-height: 200px; padding: 20px; }
  .preset-grid { grid-template-columns: repeat(4, 1fr); }
  .gradient-row { flex-direction: column; gap: 8px; }
  header h1 { font-size: 16px; }
}