:root {
  --bg: #f7f9fb;
  --surface: #ffffff;
  --surface-alt: #f1f4f7;
  --text: #1f2933;
  --muted: #6b7785;
  --border: #d7dee6;
  --accent: #429bb5;
  --danger: #b44d4d;
  --shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --surface: #1b2027;
    --surface-alt: #242b34;
    --text: #e5e9ee;
    --muted: #a2adba;
    --border: #364150;
    --accent: #56b4d3;
    --danger: #d76a6a;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}

.json-editor-page {
  max-width: 1300px;
  margin: 0 auto;
  padding: 72px 1rem 2rem;
}

.page-header h1 {
  margin: 0;
  color: var(--accent);
}

.page-header p {
  margin: 0.5rem 0 1rem;
  color: var(--muted);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.section-head {
  margin-bottom: 0.75rem;
}

.section-head h2 {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
}

.input-actions,
.table-actions,
.preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.input-actions {
  margin-bottom: 0.75rem;
}

.table-actions {
  margin: 0.75rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.preview-actions {
  margin: 0.25rem 0 0.75rem;
}

button,
.button-like {
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  font-size: 0.9rem;
  cursor: pointer;
}

button:disabled,
.button-like:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button:hover:not(:disabled),
.button-like:hover { filter: brightness(1.04); }

button.danger { border-color: color-mix(in oklab, var(--danger) 50%, var(--border)); }

.icon-button {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 1rem;
}

#fileInput { display: none; }

.selected-only-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.paste-wrap label {
  display: block;
  margin: 0.5rem 0;
  font-weight: 600;
}

textarea,
input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem;
  background: var(--surface);
  color: var(--text);
}

.message {
  min-height: 1.2rem;
  margin-top: 0.5rem;
  color: var(--muted);
}

.message.error { color: var(--danger); }

.summary {
  margin-top: 0.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--muted);
}

.table-wrap {
  overflow: auto;
  max-height: 60vh;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.table-empty {
  padding: 0.8rem;
  margin: 0;
  color: var(--muted);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}

th, td {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.4rem;
  vertical-align: top;
}

th:first-child, td:first-child,
th:nth-child(2), td:nth-child(2) {
  text-align: center;
  width: 48px;
}

.column-head {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.column-head input {
  min-width: 120px;
}

.column-remove {
  background: transparent;
  border-color: transparent;
  color: var(--danger);
  padding: 0.2rem;
}

.column-add-cell,
.column-action-cell {
  width: 42px;
  text-align: center;
}

.cell-input {
  width: 100%;
  min-height: 34px;
}

.table-footer-actions {
  margin-top: 0.75rem;
  display: flex;
  justify-content: flex-start;
}

.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.preview-head h2 {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
}

.preview-head-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.minify-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.preview-box {
  margin: 0;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem;
  min-height: 180px;
  max-height: 320px;
  overflow: auto;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 720px) {
  .json-editor-page { padding-top: 64px; }

  .panel {
    padding: 0.85rem;
  }

  .input-actions,
  .table-actions,
  .preview-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .input-actions button,
  .table-actions button,
  .preview-actions button,
  .button-like {
    min-height: 2.5rem;
    text-align: center;
  }

  .preview-head {
    align-items: flex-start;
  }

  .preview-head-controls {
    margin-left: auto;
  }

  .table-footer-actions button {
    width: 100%;
    min-height: 2.6rem;
  }
}