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

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --border: #d1d1d6;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --error: #ff3b30;
  --success: #34c759;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2rem 1rem;
}

.container {
  max-width: 680px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

header p {
  color: var(--text-muted);
  margin-top: 0.4rem;
  font-size: 0.95rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.optional {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Drop zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 2rem;
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: #f0f7ff;
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

.drop-zone-content svg {
  color: var(--border);
  margin-bottom: 0.25rem;
}

.drop-zone-content p {
  font-size: 0.95rem;
}

.drop-zone-content span {
  font-size: 0.85rem;
}

.preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.preview-container img {
  max-width: 100%;
  max-height: 220px;
  border-radius: 6px;
  object-fit: contain;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.preview-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.btn-icon:hover { background: var(--bg); }

/* Fields */
.fields { display: flex; flex-direction: column; gap: 0.875rem; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
}

.field-group { display: flex; flex-direction: column; gap: 0.3rem; }

label {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-muted);
}

input[type="text"],
textarea {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s;
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: background 0.15s, opacity 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
}

.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--bg);
  color: var(--accent);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: #e8e8ed; }

/* Status */
.status {
  margin-top: 0.875rem;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  text-align: center;
}

.status.loading {
  background: #f0f7ff;
  color: var(--accent);
}

.status.error {
  background: #fff0ef;
  color: var(--error);
}

.status.success {
  background: #f0fff4;
  color: var(--success);
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

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

.required { color: var(--error); font-weight: 500; }

/* Checkbox */
.checkbox-group { margin: 0.25rem 0; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] { display: none; }

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border);
  border-radius: 5px;
  background: var(--bg);
  flex-shrink: 0;
  margin-top: 1px;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.checkbox-label input:checked + .checkbox-custom {
  background: var(--accent);
  border-color: var(--accent);
}

.checkbox-label input:checked + .checkbox-custom::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.field-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.meta-fixed {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.meta-fixed-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.meta-label {
  font-weight: 500;
  color: var(--text-muted);
  min-width: 80px;
  flex-shrink: 0;
}

.meta-value {
  color: var(--text);
}

@media (max-width: 500px) {
  .field-row { grid-template-columns: 1fr; }
  header h1 { font-size: 1.6rem; }
}