/* ==========================================================================
   SQLFarsi — Design System
   ========================================================================== */

:root {
  --bg: #f7f8fc;
  --bg-elevated: #ffffff;
  --bg-soft: #eef0f9;
  --text: #0f1524;
  --text-muted: #5b6478;
  --border: #e3e6f0;
  --border-strong: #d3d7e6;

  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef0fd;
  --accent: #06b6d4;
  --accent-soft: #e0f8fc;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;

  --sidebar-bg: #0b1023;
  --sidebar-text: #c7cbe0;
  --sidebar-border: #1c2340;

  --code-bg: #0d1117;
  --code-text: #e6edf3;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 21, 36, 0.06);
  --shadow: 0 8px 24px rgba(15, 21, 36, 0.08);
  --shadow-lg: 0 20px 48px rgba(15, 21, 36, 0.14);
  --font-fa: "Vazirmatn", Tahoma, sans-serif;
  --font-code: "Fira Code", ui-monospace, "Cascadia Code", Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #0a0e1a;
  --bg-elevated: #101627;
  --bg-soft: #131a2e;
  --text: #e7eaf4;
  --text-muted: #8b92ab;
  --border: #1e2740;
  --border-strong: #2a3454;

  --primary: #818cf8;
  --primary-dark: #a5b0fb;
  --primary-soft: #1a1f42;
  --accent: #22d3ee;
  --accent-soft: #0c2530;

  --sidebar-bg: #070a14;
  --sidebar-text: #a9aec6;
  --sidebar-border: #171d33;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-fa);
  background: var(--bg);
  color: var(--text);
  transition: background .25s ease, color .25s ease;
}

::selection { background: var(--primary); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

a { text-decoration: none; color: inherit; }
code, pre, .ltr, .code-font { direction: ltr; unicode-bidi: isolate; font-family: var(--font-code); }

.gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.text-muted-2 { color: var(--text-muted) !important; }

/* ------------------------------ Navbar ------------------------------ */
.navbar-sf {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background .25s ease, border-color .25s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.nav-link-sf {
  color: var(--text-muted);
  font-weight: 500;
  padding: .5rem .9rem !important;
  border-radius: var(--radius-sm);
  transition: color .15s ease, background .15s ease;
}
.nav-link-sf:hover, .nav-link-sf.active { color: var(--text); background: var(--bg-soft); }

.theme-toggle, .icon-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.theme-toggle:hover, .icon-btn:hover { border-color: var(--primary); transform: translateY(-1px); }

.btn-sf-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: .65rem 1.4rem;
  font-weight: 700;
  box-shadow: 0 8px 20px -6px color-mix(in srgb, var(--primary) 60%, transparent);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}
.btn-sf-primary:hover { transform: translateY(-2px); filter: brightness(1.06); color: #fff; }

.btn-sf-outline {
  border: 1.5px solid var(--border-strong);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: .62rem 1.4rem;
  font-weight: 700;
  background: transparent;
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
}
.btn-sf-outline:hover { border-color: var(--primary); background: var(--bg-soft); color: var(--text); transform: translateY(-2px); }

.btn-sf-ghost {
  color: var(--text-muted);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: .5rem 1rem;
  transition: background .15s ease, color .15s ease;
}
.btn-sf-ghost:hover { background: var(--bg-soft); color: var(--text); }

/* ------------------------------ Hero ------------------------------ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 5.5rem 0 4rem;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .35;
  z-index: 0;
  pointer-events: none;
}
.hero-blob.one { width: 480px; height: 480px; background: var(--primary); top: -180px; inset-inline-end: -120px; }
.hero-blob.two { width: 380px; height: 380px; background: var(--accent); bottom: -160px; inset-inline-start: -100px; }

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--border-strong) 55%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border-strong) 55%, transparent) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 40%, transparent 90%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 40%, transparent 90%);
  z-index: 0;
  opacity: .6;
}

.hero > .container { position: relative; z-index: 1; }

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: .82rem;
  padding: .4rem .9rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
}

.hero h1 { font-weight: 800; font-size: clamp(2.1rem, 4.2vw, 3.4rem); line-height: 1.35; }
.hero .lead { color: var(--text-muted); font-size: 1.15rem; max-width: 620px; }

.hero-stats { display: flex; flex-wrap: wrap; gap: 1.8rem; margin-top: 2.2rem; }
.hero-stats .stat b { font-size: 1.5rem; display: block; color: var(--text); }
.hero-stats .stat span { color: var(--text-muted); font-size: .88rem; }

.code-window {
  background: var(--code-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
}
.code-window .win-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .7rem 1rem;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-window .win-dot { width: 11px; height: 11px; border-radius: 50%; }
.code-window pre {
  margin: 0;
  padding: 1.3rem 1.4rem;
  color: var(--code-text);
  font-size: .88rem;
  line-height: 1.9;
  direction: ltr;
  text-align: left;
}
.code-window .out {
  border-top: 1px dashed rgba(255,255,255,0.1);
  padding: .9rem 1.4rem 1.2rem;
}

.sql-kw { color: #ff7b72; }
.sql-fn { color: #d2a8ff; }
.sql-str { color: #a5d6ff; }
.sql-cm { color: #8b949e; }
.sql-col { color: #79c0ff; }

.result-mini {
  width: 100%;
  border-collapse: collapse;
  font-size: .8rem;
  direction: ltr;
  text-align: left;
}
.result-mini th {
  color: var(--accent);
  text-align: left;
  padding: .25rem .6rem .25rem 0;
  font-weight: 600;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.result-mini td { padding: .3rem .6rem .3rem 0; color: #cdd6e3; }

/* ------------------------------ Sections ------------------------------ */
.section { padding: 5rem 0; }
.section-title-tag {
  color: var(--primary);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .02em;
}
.section-title { font-weight: 800; font-size: clamp(1.6rem, 3vw, 2.3rem); margin-top: .4rem; }
.section-sub { color: var(--text-muted); max-width: 640px; }

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  height: 100%;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}
.feature-card h5 { font-weight: 700; }
.feature-card p { color: var(--text-muted); font-size: .93rem; margin: 0; }

/* ------------------------------ Curriculum accordion ------------------------------ */
.curriculum-accordion .accordion-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius) !important;
  overflow: hidden;
  margin-bottom: .9rem;
}
.curriculum-accordion .accordion-button {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 700;
  padding: 1.1rem 1.4rem;
  box-shadow: none !important;
}
.curriculum-accordion .accordion-button:not(.collapsed) {
  color: var(--primary);
  background: var(--primary-soft);
}
.curriculum-accordion .accordion-button::after { margin-inline-start: 0; margin-inline-end: auto; }
.curriculum-accordion .accordion-body { padding: .6rem 1rem 1.1rem; }

.chapter-num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--primary);
  font-weight: 800;
  font-size: .85rem;
  margin-inline-end: .8rem;
  flex-shrink: 0;
}
.accordion-button:not(.collapsed) .chapter-num { background: var(--primary); color: #fff; }

.chapter-meta { font-size: .78rem; color: var(--text-muted); font-weight: 500; margin-inline-start: auto; margin-inline-end: 1rem; }

.lesson-row {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem .7rem;
  border-radius: var(--radius-sm);
  transition: background .15s ease;
}
.lesson-row:hover { background: var(--bg-soft); }
.lesson-row .form-check-input { flex-shrink: 0; cursor: pointer; }
.lesson-row a { flex: 1; font-weight: 500; color: var(--text); }
.lesson-row a:hover { color: var(--primary); }
.lesson-row .badge-soon {
  font-size: .68rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: .18rem .55rem;
  border-radius: 999px;
  font-weight: 600;
}
.lesson-row.done a { color: var(--text-muted); text-decoration: line-through; }

/* ------------------------------ CTA ------------------------------ */
.cta-band {
  background: linear-gradient(120deg, var(--primary), #7c3aed 60%, var(--accent));
  border-radius: var(--radius-lg);
  padding: 3.2rem 2rem;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-band h2 { font-weight: 800; }
.cta-band .btn-sf-light {
  background: #fff;
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  padding: .7rem 1.6rem;
  font-weight: 800;
  transition: transform .15s ease;
}
.cta-band .btn-sf-light:hover { transform: translateY(-2px); color: var(--primary-dark); }

/* ------------------------------ Footer ------------------------------ */
.footer-sf {
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.6rem;
  color: var(--text-muted);
}
.footer-sf h6 { color: var(--text); font-weight: 700; margin-bottom: 1rem; }
.footer-sf a { color: var(--text-muted); display: block; padding: .28rem 0; font-size: .92rem; transition: color .15s ease; }
.footer-sf a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 2rem; padding-top: 1.4rem; font-size: .85rem; }
.footer-bottom a { display: inline; padding: 0; color: var(--primary); font-weight: 600; }
.footer-bottom a:hover { text-decoration: underline; }

.mini-footer {
  border-top: 1px solid var(--border);
  padding: 1.1rem 1rem;
  text-align: center;
  font-size: .82rem;
  color: var(--text-muted);
}
.mini-footer a { color: var(--primary); font-weight: 600; }
.mini-footer a:hover { text-decoration: underline; }

/* ============================== Lesson page ============================== */
.lesson-shell { display: flex; align-items: flex-start; max-width: 1400px; margin: 0 auto; }

.lesson-sidebar {
  width: 300px;
  flex-shrink: 0;
  position: sticky;
  top: 66px;
  height: calc(100vh - 66px);
  overflow-y: auto;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 1.4rem 1rem 2rem;
  border-inline-end: 1px solid var(--sidebar-border);
}

.progress-box { padding: 0 .4rem 1.2rem; margin-bottom: 1rem; border-bottom: 1px solid var(--sidebar-border); }
.progress-box .p-label { display: flex; justify-content: space-between; font-size: .78rem; margin-bottom: .5rem; color: var(--sidebar-text); }
.progress-box .p-track { height: 7px; border-radius: 999px; background: rgba(255,255,255,0.08); overflow: hidden; }
.progress-box .p-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--primary)); border-radius: 999px; transition: width .4s ease; }

.side-chapter { margin-bottom: .3rem; }
.side-chapter-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: .6rem;
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  padding: .6rem .5rem;
  border-radius: var(--radius-sm);
  font-size: .86rem;
  font-weight: 700;
  cursor: pointer;
  text-align: right;
}
.side-chapter-btn:hover { background: rgba(255,255,255,0.05); }
.side-chapter-btn .num { font-size: .72rem; color: var(--accent); font-weight: 800; }
.side-chapter-btn .car { margin-inline-start: auto; transition: transform .2s ease; font-size: .7rem; opacity: .6; }
.side-chapter.open .side-chapter-btn .car { transform: rotate(180deg); }
.side-chapter.active .side-chapter-btn { color: #fff; }

.side-lessons { list-style: none; padding: 0; margin: 0 0 .4rem; display: none; }
.side-chapter.open .side-lessons { display: block; }
.side-lessons li {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding-inline-start: 1.4rem;
}
.side-lessons li input[type="checkbox"] {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  cursor: pointer;
  accent-color: var(--accent);
}
.side-lessons li a {
  flex: 1;
  min-width: 0;
  display: block;
  font-size: .82rem;
  padding: .42rem .6rem;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  border-inline-start: 2px solid transparent;
}
.side-lessons li a:hover { background: rgba(255,255,255,0.05); color: #fff; }
.side-lessons li a.current { color: var(--accent); border-inline-start-color: var(--accent); background: rgba(34,211,238,0.08); font-weight: 700; }
.side-lessons li a .bi { font-size: .7rem; margin-inline-end: .4rem; }
.side-lesson-soon {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .4rem;
  font-size: .82rem;
  padding: .42rem .6rem;
  color: var(--sidebar-text);
  opacity: .55;
}
.side-lesson-soon small { font-size: .66rem; border: 1px solid var(--sidebar-border); border-radius: 999px; padding: .05rem .45rem; flex-shrink: 0; }

.lesson-main { flex: 1; min-width: 0; padding: 2.6rem clamp(1.2rem, 4vw, 4rem); }
.lesson-crumb { font-size: .85rem; color: var(--text-muted); margin-bottom: .8rem; }
.lesson-crumb .sep { margin: 0 .35rem; }
.lesson-main h1 { font-weight: 800; margin-bottom: .3rem; }
.lesson-badges { display: flex; gap: .5rem; margin-bottom: 1.6rem; }
.lesson-badges .badge { font-weight: 600; font-size: .74rem; padding: .35rem .7rem; }

.prose { line-height: 2.1; font-size: 1.02rem; color: var(--text); }
.prose h2 { font-weight: 800; font-size: 1.35rem; margin-top: 2.6rem; margin-bottom: 1rem; padding-inline-start: .8rem; border-inline-start: 4px solid var(--primary); }
.prose h3 { font-weight: 700; font-size: 1.1rem; margin-top: 1.8rem; }
.prose p { color: var(--text); margin-bottom: 1.1rem; }
.prose ul, .prose ol { color: var(--text); padding-inline-start: 1.4rem; margin-bottom: 1.1rem; }
.prose li { margin-bottom: .4rem; }
.prose strong { color: var(--primary-dark); }

.callout {
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin: 1.4rem 0;
  border: 1px solid var(--border);
  display: flex;
  gap: .8rem;
  font-size: .93rem;
}
.callout i { font-size: 1.1rem; flex-shrink: 0; }
.callout.tip { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.callout.tip i { color: var(--accent); }
.callout.warn { background: color-mix(in srgb, var(--warning) 12%, transparent); border-color: color-mix(in srgb, var(--warning) 35%, transparent); }
.callout.warn i { color: var(--warning); }

.code-block { background: var(--code-bg); border-radius: var(--radius); margin: 1.3rem 0; overflow: hidden; box-shadow: var(--shadow-sm); }
.code-block .cb-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .55rem 1rem;
  background: rgba(255,255,255,0.04);
  font-size: .74rem;
  color: #9aa4b2;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-block pre { margin: 0; padding: 1.1rem 1.3rem; color: var(--code-text); font-size: .88rem; line-height: 1.85; overflow-x: auto; direction: ltr; text-align: left; }
.copy-btn { background: transparent; border: none; color: #9aa4b2; cursor: pointer; font-size: .85rem; display: flex; align-items: center; gap: .3rem; }
.copy-btn:hover { color: #fff; }

.static-table-wrap { overflow-x: auto; margin: 1rem 0 1.4rem; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.static-table { width: 100%; border-collapse: collapse; font-size: .88rem; direction: ltr; text-align: left; }
.static-table th { background: var(--bg-soft); color: var(--text); padding: .6rem .9rem; font-weight: 700; border-bottom: 1px solid var(--border); }
.static-table td { padding: .55rem .9rem; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.static-table tr:last-child td { border-bottom: none; }

.try-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 2rem 0;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.try-box .tb-head {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .9rem 1.2rem;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: .92rem;
}
.try-box .tb-head i { color: var(--primary); }
.try-editor { direction: ltr; }
.try-editor .CodeMirror { height: auto; min-height: 90px; font-family: var(--font-code); font-size: .88rem; padding: .4rem 0; }
.try-actions { display: flex; align-items: center; gap: .6rem; padding: .8rem 1.2rem; border-top: 1px solid var(--border); background: var(--bg-elevated); }
.try-result { padding: 0 1.2rem 1.2rem; }
.try-result .result-table-wrap { max-height: 260px; overflow: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); margin-top: .8rem; }

.lesson-footer-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--border); }
.nav-card {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  transition: border-color .15s ease, transform .15s ease;
  max-width: 300px;
}
.nav-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.nav-card.disabled { opacity: .5; pointer-events: none; }
.nav-card .dir-label { font-size: .74rem; color: var(--text-muted); }
.nav-card .dir-title { font-weight: 700; }
.nav-card.next { text-align: end; }

.mark-done-btn {
  border: 1.5px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: .55rem 1.1rem;
  font-weight: 700;
  font-size: .88rem;
  transition: all .15s ease;
}
.mark-done-btn.is-done { background: color-mix(in srgb, var(--success) 14%, transparent); border-color: var(--success); color: var(--success); }

.arch-flow {
  display: flex;
  align-items: stretch;
  gap: .7rem;
  margin: 1.6rem 0;
  flex-wrap: wrap;
  justify-content: center;
}
.arch-step {
  flex: 1 1 150px;
  min-width: 130px;
  max-width: 190px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem .8rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.arch-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  margin: 0 auto .7rem;
  font-size: 1.2rem;
}
.arch-title { font-weight: 700; font-size: .88rem; margin-bottom: .3rem; }
.arch-desc { font-size: .75rem; color: var(--text-muted); line-height: 1.5; }
.arch-arrow { display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 1.2rem; flex: 0 0 auto; }
@media (max-width: 767.98px) {
  .arch-flow { flex-direction: column; }
  .arch-step { max-width: 100%; }
  .arch-arrow { transform: rotate(-90deg); }
}

/* ============================== Playground ============================== */
.pg-shell { display: flex; height: calc(100vh - 65px); }

.pg-schema {
  width: 280px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 1.2rem 1rem;
  overflow-y: auto;
  border-inline-end: 1px solid var(--sidebar-border);
}
.pg-schema h6 { color: #fff; font-weight: 700; font-size: .85rem; margin-bottom: .3rem; }
.pg-schema .schema-sub { font-size: .76rem; color: var(--sidebar-text); margin-bottom: 1rem; }

.db-select {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--sidebar-border);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: .55rem .7rem;
  font-size: .85rem;
  margin-bottom: 1.2rem;
}

.table-card { border: 1px solid var(--sidebar-border); border-radius: var(--radius-sm); margin-bottom: .6rem; overflow: hidden; }
.table-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem .7rem;
  font-size: .84rem;
  font-weight: 700;
  color: #fff;
  background: rgba(255,255,255,0.04);
}
.table-card summary::-webkit-details-marker { display: none; }
.table-card summary i.bi-chevron-left { margin-inline-start: auto; font-size: .68rem; transition: transform .2s ease; color: var(--sidebar-text); }
.table-card[open] summary i.bi-chevron-left { transform: rotate(-90deg); }
.table-card summary .bi-table { color: var(--accent); }
.col-list { list-style: none; margin: 0; padding: .4rem .7rem .7rem 2rem; font-size: .78rem; }
.col-list li { display: flex; justify-content: space-between; padding: .22rem 0; color: var(--sidebar-text); }
.col-list li b { color: #dfe3f0; font-weight: 500; }
.col-list li span { color: var(--accent); font-size: .72rem; }
.col-list li .pk { color: #fbbf24; }

.sample-q-btn {
  display: block;
  width: 100%;
  text-align: right;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--sidebar-border);
  color: var(--sidebar-text);
  padding: .5rem .65rem;
  border-radius: var(--radius-sm);
  font-size: .78rem;
  margin-bottom: .45rem;
  transition: background .15s ease, color .15s ease;
}
.sample-q-btn:hover { background: rgba(255,255,255,0.07); color: #fff; }

.pg-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.pg-toolbar {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .7rem 1.1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  flex-wrap: wrap;
}
.pg-toolbar .spacer { flex: 1; }
.run-btn {
  background: linear-gradient(135deg, var(--success), #15803d);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: .55rem 1.3rem;
  font-weight: 700;
  font-size: .88rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  box-shadow: 0 6px 16px -6px rgba(22,163,74,.55);
  transition: transform .15s ease, filter .15s ease;
}
.run-btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.kbd-hint { font-size: .72rem; color: var(--text-muted); border: 1px solid var(--border); border-radius: 6px; padding: .1rem .4rem; }

.pg-editor-wrap { flex: 0 0 auto; border-bottom: 1px solid var(--border); }
.pg-editor-wrap .CodeMirror { height: 190px; font-family: var(--font-code); font-size: .92rem; direction: ltr; }

.pg-results { flex: 1; overflow: auto; padding: 1rem 1.1rem; background: var(--bg); }
.result-meta { display: flex; align-items: center; gap: .8rem; margin-bottom: .8rem; font-size: .8rem; color: var(--text-muted); }
.result-meta .ok { color: var(--success); font-weight: 700; }

.result-table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elevated); }
table.result-table { border-collapse: collapse; width: 100%; font-size: .84rem; direction: ltr; text-align: left; white-space: nowrap; }
table.result-table thead th {
  position: sticky; top: 0;
  background: var(--bg-soft);
  color: var(--text);
  padding: .6rem .9rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
}
table.result-table td { padding: .5rem .9rem; border-bottom: 1px solid var(--border); color: var(--text); }
table.result-table tr:hover td { background: var(--bg-soft); }
table.result-table tr:last-child td { border-bottom: none; }

.pg-error {
  direction: ltr;
  text-align: left;
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent);
  color: var(--danger);
  border-radius: var(--radius-sm);
  padding: .8rem 1rem;
  font-family: var(--font-code);
  font-size: .83rem;
  white-space: pre-wrap;
}

.pg-empty { text-align: center; color: var(--text-muted); padding: 3rem 1rem; }
.pg-empty i { font-size: 2.2rem; margin-bottom: .8rem; display: block; color: var(--border-strong); }

.loading-overlay {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 1rem;
  z-index: 2000; transition: opacity .3s ease;
}
.spinner-ring {
  width: 46px; height: 46px; border-radius: 50%;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Mobile */
@media (max-width: 991.98px) {
  .lesson-sidebar { position: fixed; inset-inline-start: 0; top: 0; height: 100vh; z-index: 1050; transform: translateX(100%); transition: transform .25s ease; }
  [dir="rtl"] .lesson-sidebar { transform: translateX(100%); }
  .lesson-sidebar.show { transform: translateX(0); }
  .sidebar-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1040; display: none; }
  .sidebar-backdrop.show { display: block; }
  .mobile-sidebar-toggle { display: inline-flex !important; }

  .pg-schema { position: fixed; inset-inline-start: 0; top: 0; height: 100vh; z-index: 1050; transform: translateX(100%); transition: transform .25s ease; width: 280px; }
  .pg-schema.show { transform: translateX(0); }
}
.mobile-sidebar-toggle { display: none !important; }

@media (max-width: 767.98px) {
  .pg-shell { height: auto; min-height: calc(100vh - 65px); flex-direction: column; }
  .pg-editor-wrap .CodeMirror { height: 150px; }
}