* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f5f7fb;
  color: #1f2937;
}

a {
  text-decoration: none;
}

img {
  max-width: 100%;
}

.container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  max-width: 800px;
}

.topbar {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  padding: 16px 0;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin: 32px 0 24px;
}

.page-header h1 {
  margin: 0 0 5px;
}

.muted {
  color: #6b7280;
  margin: 0;
}

.btn {
  display: inline-block;
  border: 0;
  border-radius: 7px;
  padding: 10px 15px;
  font-size: 14px;
  cursor: pointer;
  transition: 0.2s;
}

.btn:hover {
  opacity: 0.85;
}

.btn-primary {
  background: #2563eb;
  color: #ffffff;
}

.btn-secondary {
  background: #e5e7eb;
  color: #111827;
}

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

.btn-small {
  background: #111827;
  color: #ffffff;
  padding: 8px 12px;
}

.btn-large {
  padding: 13px 20px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-bottom: 40px;
}

.image-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow: hidden;
}

.image-preview {
  height: 220px;
  background: #f3f4f6;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.image-content {
  padding: 16px;
}

.image-content h3 {
  margin: 0 0 8px;
  font-size: 17px;
  word-break: break-word;
}

.description {
  color: #4b5563;
  font-size: 14px;
}

.image-meta {
  color: #6b7280;
  font-size: 12px;
  margin: 12px 0;
}

.url-box {
  display: flex;
  gap: 6px;
  margin: 12px 0;
}

.url-box input {
  flex: 1;
  min-width: 0;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 8px;
  font-size: 12px;
  background: #f9fafb;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.card-actions form {
  display: inline;
}

.form-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 7px;
}

.form-group input[type='text'],
.form-group input[type='password'],
.form-group input[type='file'],
.form-group textarea {
  width: 100%;
  padding: 11px;
  border: 1px solid #d1d5db;
  border-radius: 7px;
  font-size: 15px;
  background: #ffffff;
}

.form-group textarea {
  resize: vertical;
}

.form-group small {
  display: block;
  margin-top: 6px;
  color: #6b7280;
}

.alert {
  padding: 14px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.alert-success {
  background: #dcfce7;
  color: #166534;
}

.alert-danger {
  background: #fee2e2;
  color: #991b1b;
}

.alert ul {
  margin-bottom: 0;
}

.empty-state {
  background: #ffffff;
  border: 1px dashed #d1d5db;
  border-radius: 12px;
  padding: 60px 20px;
  text-align: center;
}

.empty-state h2 {
  margin-top: 0;
}

.login-page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.login-card {
  background: #ffffff;
  width: 100%;
  max-width: 420px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 30px;
}

.login-logo {
  font-weight: bold;
  font-size: 20px;
  margin-bottom: 30px;
}

.login-card h1 {
  margin-top: 0;
}

.edit-preview {
  background: #f3f4f6;
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
}

.edit-preview img {
  max-height: 400px;
  object-fit: contain;
}

@media (max-width: 900px) {
  .image-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .container {
    width: min(100% - 20px, 1200px);
  }

  .topbar-inner,
  .page-header {
    flex-direction: column;
    align-items: stretch;
  }

  .image-grid {
    grid-template-columns: 1fr;
  }

  .card-actions .btn,
  .card-actions form {
    flex: 1;
  }

  .card-actions form button {
    width: 100%;
  }

  .url-box {
    flex-direction: column;
  }
}