:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --editor: #fbfcfe;
  --text: #1d2430;
  --muted: #687386;
  --border: #d9dee7;
  --accent: #1f6feb;
  --accent-dark: #1958b7;
  --error-bg: #fff0f0;
  --error-text: #a42020;
  --ok-text: #26733b;
  --warning-bg: #fff8df;
  --warning-text: #765004;
}

:root[data-theme="dark"] {
  --bg: #111418;
  --surface: #1a1f25;
  --editor: #14191f;
  --text: #e7edf5;
  --muted: #9aa6b5;
  --border: #303844;
  --accent: #6aa6ff;
  --accent-dark: #8bbaff;
  --error-bg: #2a1719;
  --error-text: #ff9c9c;
  --ok-text: #87d99c;
  --warning-bg: #2a2414;
  --warning-text: #e5c45c;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--text);
  background: var(--bg);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

body {
  margin: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  min-height: 2.25rem;
  padding: 0.45rem 0.8rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

button:hover,
button:focus,
input:focus,
textarea:focus {
  border-color: var(--accent);
  outline: none;
}

input,
select,
textarea {
  width: 100%;
  color: var(--text);
  background: var(--editor);
  border: 1px solid var(--border);
  border-radius: 6px;
}

input,
select {
  min-height: 2.35rem;
  padding: 0.45rem 0.6rem;
}

textarea {
  display: block;
  min-height: 12rem;
  padding: 0.75rem;
  resize: vertical;
  font-family: Consolas, Monaco, "Liberation Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.45;
  tab-size: 2;
}

.primary-button,
.toolbar button:first-child {
  color: #ffffff;
  background: var(--accent);
  border-color: var(--accent);
}

.primary-button:hover,
.primary-button:focus,
.toolbar button:first-child:hover,
.toolbar button:first-child:focus {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.plain-button {
  min-height: 1.8rem;
  padding: 0.2rem 0.45rem;
  color: var(--accent);
  background: transparent;
  border-color: transparent;
  font-size: 0.86rem;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.2;
}

.topbar p {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.home-link {
  color: var(--accent);
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
}

.home-link:hover,
.home-link:focus {
  color: var(--accent-dark);
  text-decoration: underline;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: flex-end;
}

.theme-toggle {
  min-height: 1.9rem;
  padding: 0.25rem 0.55rem;
  color: var(--accent);
  background: transparent;
  border-color: var(--border);
  font-size: 0.86rem;
  white-space: nowrap;
}

.app {
  width: min(1500px, 100%);
  margin: 0 auto;
  padding: 1rem clamp(0.75rem, 2vw, 1.5rem) 2rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.panel,
.changes-panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 2.6rem;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.panel-header h2 {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.2;
}

.editor-grid,
.result-grid,
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.status,
.summary {
  margin-bottom: 0.75rem;
  padding: 0.7rem 0.8rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 6px;
}

.status.ok,
.summary.ok {
  color: var(--ok-text);
  border-left-color: var(--ok-text);
}

.status.error,
.summary.error {
  color: var(--error-text);
  background: var(--error-bg);
  border-left-color: var(--error-text);
}

.status.changed,
.summary.changed,
.status.warning,
.summary.warning {
  color: var(--warning-text);
  background: var(--warning-bg);
  border-left-color: var(--warning-text);
}

.field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.field label {
  color: var(--muted);
  font-size: 0.86rem;
}

.inline-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: end;
}

.value-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0.75rem;
}

.value-row {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
}

.value-label {
  color: var(--muted);
  font-size: 0.86rem;
}

.value-output,
.mono {
  font-family: Consolas, Monaco, "Liberation Mono", monospace;
}

.value-output {
  min-width: 0;
  overflow-wrap: anywhere;
}

.muted {
  color: var(--muted);
}

@media (max-width: 850px) {
  .topbar {
    display: block;
  }

  .home-link {
    display: inline-block;
  }

  .topbar-actions {
    justify-content: flex-start;
    margin-top: 0.5rem;
  }

  .editor-grid,
  .result-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .toolbar button {
    flex: 1 1 calc(50% - 0.5rem);
  }

  .toolbar button:first-child {
    flex-basis: 100%;
  }

  .inline-form,
  .value-row {
    grid-template-columns: 1fr;
  }

  .value-row .plain-button {
    justify-self: start;
  }
}