:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --border: #d8deea;
  --text: #172033;
  --muted: #667085;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #b42318;
  --success: #027a48;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  padding: 10px 14px;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.app-header {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 30px min(5vw, 48px);
}

.app-header h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  margin: 4px 0 8px;
}

.eyebrow,
.subtitle {
  margin: 0;
}

.eyebrow {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.subtitle {
  color: #dbeafe;
}

.layout {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(280px, 0.9fr) minmax(380px, 1.1fr) minmax(360px, 1fr);
  padding: 22px min(5vw, 48px) 42px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  min-width: 0;
  padding: 18px;
}

.panel-heading {
  align-items: center;
  display: flex;
  gap: 14px;
  justify-content: space-between;
  margin-bottom: 16px;
}

.panel h2 {
  font-size: 18px;
  margin: 0;
}

label {
  color: var(--muted);
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin: 14px 0 6px;
}

input,
textarea {
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  outline: none;
  padding: 11px 12px;
  width: 100%;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

textarea {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  min-height: 430px;
  resize: vertical;
}

.muted {
  color: var(--muted);
  font-size: 13px;
  margin: 4px 0 0;
}

.messages {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.message {
  border-radius: 10px;
  font-size: 13px;
  padding: 10px 12px;
}

.message.error {
  background: #fef3f2;
  color: var(--danger);
}

.message.info {
  background: #eff6ff;
  color: #1e40af;
}

.message.success {
  background: #ecfdf3;
  color: var(--success);
}

.table-wrap {
  overflow: auto;
}

table {
  border-collapse: collapse;
  min-width: 650px;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  text-align: left;
  vertical-align: middle;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

td code,
.badge {
  border-radius: 999px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
  padding: 4px 8px;
}

td code {
  background: #f2f4f7;
}

.badge {
  background: #ecfdf3;
  color: var(--success);
  display: inline-block;
  font-weight: 700;
}

.badge.off {
  background: #f2f4f7;
  color: var(--muted);
}

.table-input {
  min-width: 150px;
  padding: 8px 10px;
}

.empty-state {
  color: var(--muted);
  padding: 28px;
  text-align: center;
}

.code-preview {
  background: var(--code-bg);
  border-radius: 14px;
  color: var(--code-text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  min-height: 560px;
  overflow: auto;
  padding: 18px;
  white-space: pre;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr 1fr;
  }

  .preview-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
    padding-inline: 14px;
  }

  .panel-heading {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}