:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --ok: #16a34a;
  --ok-dark: #15803d;
  --err: #dc2626;
  --err-dark: #b91c1c;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 10px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans Arabic", Tahoma, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

/* ── Persian font (Vazirmatn — self-hosted, clear and readable) ── */
@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ── Persian (FA) typography ───────────────────────── */
html[lang="fa"] body {
  font-family: "Vazirmatn", "B Yekan", "Yekan", "Noto Sans Arabic", Tahoma, sans-serif;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

/* ── two-column layout: sample questions (left) + ask panel ─────────── */
.layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  direction: ltr; /* keep the sidebar physically on the left in both LTR and RTL */
}

.sample-panel {
  width: 340px;
  flex-shrink: 0;
  position: sticky;
  top: 16px;
}

.main-panel {
  flex: 1;
  min-width: 0;
}

html[lang="fa"] .sample-panel,
html[lang="fa"] .main-panel {
  direction: rtl;
}

.sample-panel h2 { margin-top: 0; }
.sample-hint { margin: -8px 0 14px; font-size: 13px; }

.sample-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sample-btn {
  display: block;
  width: 100%;
  padding: 14px 16px;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  text-align: start;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s,
              transform 0.1s ease;
}

.sample-btn:hover {
  background: var(--bg);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.sample-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.sample-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

.sample-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

@media (prefers-reduced-motion: reduce) {
  .sample-btn { transition: none; }
  .sample-btn:hover, .sample-btn:active { transform: none; }
}

@media (max-width: 960px) {
  .layout { flex-direction: column; }
  .sample-panel { width: 100%; position: static; }
}

/* ── header ─────────────────────────────────────────── */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo {
  height: 120px;
  width: 120px;
}

nav { display: flex; align-items: center; gap: 12px; }
.user { color: var(--muted); font-size: 14px; }

.header-right { display: flex; align-items: center; gap: 14px; }

.lang-switch {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.lang-btn {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.lang-btn:hover { background: var(--bg); color: var(--text); }
.lang-btn.active { background: var(--primary); color: #fff; }

/* ── cards & forms ──────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.card h1, .card h2 { margin-top: 0; }
.muted { color: var(--muted); }

.auth-wrap {
  display: flex;
  justify-content: center;
  padding-top: 8vh;
}

.auth-card { width: 100%; max-width: 380px; }

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin: 14px 0 6px;
}

input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea { resize: vertical; min-height: 110px; }

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  margin: 0;
  cursor: pointer;
}

.check input { width: auto; }

/* ── buttons ────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 10px 18px;
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s,
              transform 0.1s ease;
}

.btn:hover {
  background: var(--bg);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

.btn-primary {
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: var(--primary-dark);
  color: #fff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-primary:active { box-shadow: 0 1px 3px rgba(37, 99, 235, 0.35); }

.btn-block { width: 100%; margin-top: 20px; }
.btn-small { padding: 6px 12px; font-size: 13px; }

.btn-group { display: flex; align-items: center; gap: 10px; }

/* Danger — used for logout / destructive actions */
.btn-danger {
  background: var(--err);
  border-color: var(--err);
  color: #fff;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.3);
}

.btn-danger:hover {
  background: var(--err-dark);
  border-color: var(--err-dark);
  color: #fff;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.35);
}

.btn-danger:active { box-shadow: 0 1px 3px rgba(220, 38, 38, 0.3); }

.btn-danger:focus-visible {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.3);
}

.btn-download {
  background: var(--ok-dark);
  border-color: var(--ok-dark);
  color: #fff;
  box-shadow: 0 2px 6px rgba(22, 163, 74, 0.3);
}

.btn-download:hover {
  background: var(--ok);
  border-color: var(--ok);
  color: #fff;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.35);
}

.btn-download:active { box-shadow: 0 1px 3px rgba(22, 163, 74, 0.3); }

.btn-download:focus-visible {
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.3);
}

.icon-dl {
  width: 16px;
  height: 16px;
  vertical-align: -3px;
  margin-inline-end: 6px;
}

/* ── icon-only download box at the bottom of the results card ────────── */
.results-download {
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
}

.btn-download-icon {
  padding: 10px 12px;
  line-height: 0;
}

.btn-download-icon .icon-dl {
  width: 18px;
  height: 18px;
  margin-inline-end: 0;
  vertical-align: 0;
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn:hover, .btn:active { transform: none; }
}

/* ── flash messages ─────────────────────────────────── */
.flash {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  border: 1px solid;
}

.flash-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* ── loading spinner ────────────────────────────────── */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 48px 24px;
  margin-bottom: 24px;
}

.loading[hidden] { display: none; }

.loading img { width: 224px; height: 224px; }

/* ── results ────────────────────────────────────────── */
.ask-card { margin-bottom: 24px; }

.results-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.results-head h2 { margin: 0; }
.results-head .meta { margin-left: auto; }

.badge {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.badge-ok  { background: #dcfce7; color: #166534; }
.badge-err { background: #fee2e2; color: #991b1b; }

.asked {
  margin: 14px 0 0;
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.sql-box {
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  background: #f8fafc;
}

.sql-box summary { cursor: pointer; font-weight: 600; font-size: 14px; }

.sql-body { text-align: left; }

.sql-body pre {
  margin: 10px 0 8px;
  overflow-x: auto;
  background: #0f172a;
  border-radius: 8px;
  padding: 12px 14px;
  font-family: Consolas, "Cascadia Code", monospace;
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── SQL keyword highlighting (dark code block) ─────────────── */
.sql-body code { color: #f8fafc; } /* plain identifiers stay white on the dark background */
.sql-body code .token.keyword     { color: #60a5fa; font-weight: 600; }
.sql-body code .token.string      { color: #fbbf24; }
.sql-body code .token.number      { color: #f472b6; }
.sql-body code .token.comment     { color: #64748b; font-style: italic; }
.sql-body code .token.function    { color: #c084fc; }
.sql-body code .token.operator    { color: #94a3b8; }
.sql-body code .token.punctuation { color: #94a3b8; }

.btn-copy { margin-top: 4px; }

.interpretation {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 14px 16px;
  margin: 16px 0;
}

/* ── table ──────────────────────────────────────────── */
.table-wrap {
  margin-top: 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

thead th {
  background: #f8fafc;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: #fafbfc; }

/* ── pagination ─────────────────────────────────────── */
tbody tr[hidden] { display: none; }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 14px;
}

.pagination[hidden] { display: none; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.page-info {
  font-size: 13px;
  color: var(--muted);
  min-width: 96px;
  text-align: center;
}

.meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.meta code {
  background: #f1f5f9;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
}