:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #dcdfe4;
  --text: #1f2430;
  --text-dim: #6b7280;
  --accent: #3b6fe0;
  --accent-hover: #2f5cc4;
  --danger: #d64545;
  --danger-hover: #b93636;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

/* 로그인 화면 */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
  width: 320px;
  text-align: center;
}
.login-box h1 { font-size: 18px; margin: 0 0 8px; }
.login-box p { color: var(--text-dim); font-size: 13px; margin: 0 0 16px; }
.login-box input {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 12px;
  font-size: 14px;
}
.login-box button {
  width: 100%;
}
.error-text { color: var(--danger); font-size: 12px; min-height: 16px; }

/* 앱 레이아웃 */
.app { display: flex; flex-direction: column; height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 16px; margin: 0; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.status-text { font-size: 12px; color: var(--text-dim); min-width: 160px; text-align: right; }

button {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}
button:hover { background: #eef1f5; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-hover); }
button.danger { background: #fff; border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: var(--danger); color: #fff; }

.domain-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 20px 0;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.domain-tab {
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  padding: 8px 14px;
  color: var(--text-dim);
  font-weight: 600;
}
.domain-tab:hover { background: #eef1f5; }
.domain-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.layout { flex: 1; display: flex; min-height: 0; }

.item-list-pane {
  width: 280px;
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  padding: 12px;
}
.item-list-pane input {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 13px;
}
.item-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.item-list li {
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.item-list li:hover { background: #eef1f5; }
.item-list li.selected { background: var(--accent); color: #fff; }
.item-list li .item-id { color: var(--text-dim); font-size: 11px; }
.item-list li.selected .item-id { color: #dce6fb; }
.grade-badge {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid currentColor;
}

.detail-pane { flex: 1; overflow-y: auto; padding: 20px; }
.empty-state { color: var(--text-dim); font-size: 13px; margin-top: 40px; text-align: center; }

.item-form { max-width: 720px; margin: 0 auto 60px; }
.field-group {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 14px;
}
.field-group h3 {
  font-size: 13px;
  margin: 0 0 12px;
  color: var(--text-dim);
  font-weight: 600;
}
.field-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.field-row:last-child { margin-bottom: 0; }
.field-row label { width: 180px; font-size: 12px; color: var(--text-dim); flex-shrink: 0; }
.field-row input[type="text"],
.field-row input[type="number"],
.field-row textarea,
.field-row select {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  font-family: inherit;
}
.field-row textarea { resize: vertical; min-height: 50px; }
.field-row input[readonly] { background: #f0f1f3; color: var(--text-dim); }
.field-row input[type="checkbox"] { width: auto; flex: none; }

.array-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  flex: 1;
}
.array-grid input { width: 100%; padding: 4px 6px; border: 1px solid var(--border); border-radius: 4px; font-size: 12px; }

.reward-list { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.reward-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 0.8fr 0.8fr auto;
  gap: 6px;
  align-items: center;
}
.reward-row input, .reward-row select { padding: 4px 6px; border: 1px solid var(--border); border-radius: 4px; font-size: 12px; }
.reward-row button { padding: 4px 8px; font-size: 11px; }
.add-row-btn { align-self: flex-start; font-size: 12px; padding: 4px 10px; }

.drop-row {
  display: grid;
  grid-template-columns: 0.7fr 1.6fr 0.8fr auto;
  gap: 6px;
  align-items: center;
}
.drop-row input { padding: 4px 6px; border: 1px solid var(--border); border-radius: 4px; font-size: 12px; }
.drop-row button { padding: 4px 8px; font-size: 11px; }
.drop-item-name { font-size: 12px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.form-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
}

.readonly-note { font-size: 11px; color: var(--text-dim); margin: -4px 0 10px; }

.sprite-preview-wrap { flex: 1; display: flex; align-items: center; gap: 10px; }
.sprite-preview-wrap input { flex: 1; }
.sprite-preview {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 4px;
  background:
    linear-gradient(45deg, #e5e7eb 25%, transparent 25%, transparent 75%, #e5e7eb 75%),
    linear-gradient(45deg, #e5e7eb 25%, transparent 25%, transparent 75%, #e5e7eb 75%);
  background-size: 10px 10px;
  background-position: 0 0, 5px 5px;
  flex-shrink: 0;
}
.sprite-preview-status { font-size: 11px; color: var(--text-dim); flex-shrink: 0; }