/* 全局样式 - 响应式设计 */

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --text-color: #1f2937;
  --bg-color: #f9fafb;
  --border-color: #e5e7eb;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

/* Header */
header {
  background: white;
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  box-shadow: var(--shadow);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Container */
.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Card */
.card {
  background: white;
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 2rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Button */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #6b7280;
  color: white;
}

.btn-secondary:hover {
  background-color: #4b5563;
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background-color: #dc2626;
}

.btn-block {
  display: block;
  width: 100%;
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-checkbox {
  width: auto;
  margin-right: 0.5rem;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.upload-area:hover {
  border-color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.05);
}

.upload-area.dragover {
  border-color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
}

/* Preview */
.preview-container {
  text-align: center;
  margin: 2rem 0;
}

.preview-image {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
}

/* Current QR Code */
.qrcode-display {
  text-align: center;
  padding: 2rem;
}

.qrcode-image {
  max-width: 100%;
  max-height: 500px;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform 0.2s;
}

.qrcode-image:hover {
  transform: scale(1.02);
}

.qrcode-info {
  margin-top: 1rem;
  color: #6b7280;
  font-size: 0.875rem;
}

/* Toast Notification */
.toast {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: white;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: slideIn 0.3s ease-out;
  max-width: 400px;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success {
  border-left: 4px solid var(--success-color);
}

.toast.error {
  border-left: 4px solid var(--danger-color);
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  font-weight: 600;
  background-color: var(--bg-color);
}

/* Loading */
.loading {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Alert */
.alert {
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.alert-warning {
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    margin: 1rem auto;
  }

  .card {
    padding: 1.5rem;
  }

  .header-container {
    flex-direction: column;
    gap: 1rem;
  }

  .toast {
    right: 1rem;
    left: 1rem;
    max-width: none;
  }

  .table {
    font-size: 0.875rem;
  }

  .table th,
  .table td {
    padding: 0.5rem;
  }
}

/* Login Page */
.login-container {
  max-width: 400px;
  margin: 4rem auto;
  padding: 0 1rem;
}

.login-card {
  background: white;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  padding: 2rem;
}

.login-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 2rem;
  color: var(--primary-color);
}