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

:root {
  --bg: #f4ede0;
  --bg-card: #fffaf3;
  --bg-card-hover: #fffcf7;
  --bg-code: #f3ecdf;
  --border: #deceb4;
  --border-hover: #cbb594;
  --text: #31261d;
  --text-dim: #6f5d49;
  --text-muted: #9a856d;
  --accent: #1b8d6e;
  --accent-dim: #146f58;
  --accent-glow: rgba(27, 141, 110, 0.14);
  --amber: #ca8d36;
  --blue: #4e82bf;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  font-family: var(--font);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  background: var(--bg);
  background-image:
    radial-gradient(circle at top left, rgba(78, 130, 191, 0.11), transparent 26%),
    radial-gradient(circle at top right, rgba(202, 141, 54, 0.16), transparent 24%),
    linear-gradient(180deg, #fbf8f2 0%, var(--bg) 42%, #efe4d3 100%);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
}

/* ── Site Header ── */
.site-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.9rem 0 0.85rem;
  margin-bottom: 1.6rem;
  border-bottom: 1px solid var(--border);
}

.header-meta {
  margin-left: auto;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  align-items: center;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  line-height: 1;
}

.meta-chip-label {
  padding: 0.22rem 0.42rem;
  background: rgba(27, 141, 110, 0.08);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-right: 1px solid var(--border);
}

.meta-chip-value {
  padding: 0.22rem 0.48rem;
  color: var(--text-dim);
  background: rgba(251, 248, 242, 0.6);
}

.site-logo {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.site-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.2rem 0.55rem;
  background: rgba(27, 141, 110, 0.08);
  border: 1px solid rgba(27, 141, 110, 0.2);
  border-radius: 20px;
  letter-spacing: 0.04em;
}

/* ── Labels ── */
label {
  display: block;
  margin: 0.6rem 0 0.22rem;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

/* ── Inputs & Selects ── */
input, select {
  background: rgba(251, 248, 242, 0.88);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.42rem 0.6rem;
  border-radius: var(--radius-sm);
  width: 100%;
  font-family: var(--font);
  font-size: 0.85rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

select { cursor: pointer; }

/* ── Buttons ── */
.btn-row {
  display: flex;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

button {
  padding: 0.48rem 1.15rem;
  background: linear-gradient(135deg, var(--accent), #2ea89d);
  color: #fff;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
  font-family: var(--font);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px var(--accent-glow);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-muted);
  cursor: default;
  transform: none;
  box-shadow: none;
}

button.secondary {
  background: rgba(78, 130, 191, 0.08);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

button.secondary:hover {
  background: rgba(78, 130, 191, 0.14);
  border-color: var(--border-hover);
  box-shadow: none;
}

/* ── Status line ── */
#status {
  margin-top: 0.55rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--amber);
  min-height: 1.2em;
}

/* ── Form card ── */
#form-area {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  box-shadow: 0 18px 44px rgba(2, 8, 23, 0.32);
  transition: border-color var(--transition);
}

#form-area:focus-within {
  border-color: rgba(148, 163, 184, 0.32);
}

#form-cols {
  display: flex;
  gap: 1.6rem;
}

#col-left { flex: 1; min-width: 0; }
#col-right { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* ── SQL display ── */
.sql-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

#sql-preview {
  white-space: pre;
  overflow-x: auto;
  overflow-y: scroll;
  scrollbar-gutter: stable;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background: linear-gradient(180deg, rgba(248, 241, 229, 0.98), rgba(241, 232, 218, 0.98));
  padding: 0.8rem;
  border: 1px solid rgba(202, 141, 54, 0.14);
  border-radius: var(--radius-sm);
  margin: 0;
  flex: 1;
  min-height: 280px;
  max-height: 520px;
  line-height: 1.55;
}

#sql-scroll-hint {
  margin-top: 0.35rem;
  min-height: 1.1em;
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity var(--transition);
  user-select: none;
}

#sql-scroll-hint.visible {
  opacity: 1;
}

/* ── Engine checkboxes ── */
.engine-row {
  display: flex;
  gap: 1.4rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.cb-label {
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: none;
  letter-spacing: 0;
  margin: 0;
}

.cb-label input[type=checkbox] {
  width: auto;
  cursor: pointer;
  accent-color: var(--accent);
}

/* ── Form bottom ── */
#form-bottom {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
}

/* ── Engine result sections ── */
.engine-section {
  margin-top: 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  transition: border-color var(--transition);
}

.engine-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.55rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
}

/* ── Output area ── */
#output {
  margin-top: 1.2rem;
  overflow-x: auto;
}

/* ── Data tables ── */
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.81rem;
  font-family: var(--font-mono);
}

th {
  background: rgba(27, 141, 110, 0.1);
  color: var(--accent);
  text-align: left;
  padding: 0.38rem 0.65rem;
  border: 1px solid rgba(27, 141, 110, 0.15);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

td {
  padding: 0.3rem 0.65rem;
  border: 1px solid rgba(222, 206, 180, 0.5);
  color: var(--text-dim);
}

tr:nth-child(even) td {
  background: rgba(241, 232, 218, 0.45);
}

tr:hover td {
  background: rgba(27, 141, 110, 0.05);
  color: var(--text);
}

/* ── Raw/pre output ── */
#raw {
  white-space: pre;
  overflow: auto;
  font-size: 0.79rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  max-height: 400px;
  background: var(--bg-code);
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  line-height: 1.55;
}

/* ── Progress ── */
#progress {
  margin-top: 1rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* ── Chart wrapper ── */
#chart {
  margin-top: 1rem;
}