/* ============================================================
   SQL JOIN FAN-OUT VISUALIZER — tool-specific styles
   Standalone page, not built on playground-core.css. Follows the
   same CSS-variable/theme convention used by the other /tools/*.php
   pages (see sql-joins-visualizer.css / sql-window-visualizer.css):
   a light-first :root palette with a [data-theme="dark"] override,
   the shared .hero/.hero-content/.hero-h1/.hero-para/.hero-stats
   block, and var(--bg-card)/var(--border)/var(--shadow) cards — so
   this tool matches the rest of /tools and follows the site-wide
   theme toggle instead of forcing its own always-dark look.
   ============================================================ */

* {
    box-sizing: border-box;
}

:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #10b981;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-faint: #9ca3af;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(180deg, #c8f65f, #a3e635);
    --code-bg: #0f172a;
    --code-text: #d4d4d4;
    --fo-coral: #e11d48;
    --fo-coral-bg: rgba(225, 29, 72, 0.08);
    --fo-coral-border: rgba(225, 29, 72, 0.28);
    --fo-lime: #4d7c0f;
    --fo-lime-bg: rgba(132, 204, 22, 0.12);
    --fo-lime-border: rgba(132, 204, 22, 0.35);
    --fo-violet-bg: rgba(139, 92, 246, 0.1);
    --fo-violet-border: rgba(139, 92, 246, 0.3);
    /*--navbar-height: 68px;*/
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-faint: #8b93a7;
    --border: #374151;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --code-bg: #0f172a;
    --code-text: #cbd5e1;
    --fo-coral: #fb7185;
    --fo-coral-bg: rgba(251, 113, 133, 0.14);
    --fo-coral-border: rgba(251, 113, 133, 0.35);
    --fo-lime: #a3e635;
    --fo-lime-bg: rgba(163, 230, 53, 0.12);
    --fo-lime-border: rgba(163, 230, 53, 0.32);
    --fo-violet-bg: rgba(139, 92, 246, 0.16);
    --fo-violet-border: rgba(139, 92, 246, 0.34);
}

body[data-page="sql-join-fanout-visualizer"] {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

/* ===========================
   HERO SECTION (matches other /tools/*.php pages)
   =========================== */

.hero {
    background: var(--gradient);
    padding: 4rem 2rem;
    text-align: center;
    color: #10210a;
    position: relative;
    overflow: hidden;
    border-bottom: 2px solid var(--border);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.hero-para {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.hero-stats span {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .hero {
    background: linear-gradient(to right, #111827, #1f2937);
}

[data-theme="dark"] .hero-h1,
[data-theme="dark"] .hero-para {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .hero-stats span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border: 1px solid #7c3aed;
}

/* ===========================
   PAGE WRAP + CARDS
   =========================== */

body[data-page="sql-join-fanout-visualizer"] .fo-wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: clamp(18px, 3vw, 32px) clamp(16px, 4vw, 28px) 60px;
}

.fo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 4px 15px var(--shadow);
    padding: 1.5rem;
    margin-bottom: 22px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.fo-card:hover {
    border-color: var(--primary);
}

.fo-card h2 {
    font-size: 1.05rem;
    font-weight: 800;
    margin: 0 0 14px;
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--text-primary);
}

.fo-card h2 i {
    color: var(--primary);
}

/* ---------- CONFIGURATOR ---------- */
.fo-order-row {
    display: grid;
    grid-template-columns: auto 1fr 1fr auto;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-secondary);
    margin-bottom: 10px;
}
.fo-order-row .fo-order-label {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.fo-order-field { display: flex; flex-direction: column; gap: 4px; }
.fo-order-field label {
    font-size: 0.68rem;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.fo-order-field input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 7px;
    color: var(--text-primary);
    padding: 7px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    width: 100%;
}
.fo-order-field input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.fo-remove-btn {
    background: var(--fo-coral-bg);
    border: 1px solid var(--fo-coral-border);
    color: var(--fo-coral);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease;
}
.fo-remove-btn:hover { background: var(--fo-coral-border); }
.fo-remove-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.fo-add-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 9px;
    border: 1px dashed var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.86rem;
    cursor: pointer;
    margin-top: 4px;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.fo-add-btn:hover { border-color: var(--primary); color: var(--primary); }
.fo-add-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- FAN-OUT DIAGRAM ---------- */
.fo-lanes { display: grid; gap: 14px; }
.fo-lane { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.fo-lane-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    color: var(--text-secondary);
    min-width: 92px;
}
.fo-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.fo-chip {
    padding: 7px 12px;
    border-radius: 8px;
    background: var(--fo-coral-bg);
    border: 1px solid var(--fo-coral-border);
    color: var(--fo-coral);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
}
.fo-lane-multiplier {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--fo-coral);
    font-weight: 700;
    white-space: nowrap;
}

/* ---------- STAT TILES ---------- */
.fo-stats {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 16px;
    align-items: stretch;
    margin-top: 8px;
}
.fo-stat { border-radius: 14px; padding: 18px 20px; border: 1px solid var(--border); }
.fo-stat.buggy { background: var(--fo-coral-bg); border-color: var(--fo-coral-border); }
.fo-stat.correct { background: var(--fo-lime-bg); border-color: var(--fo-lime-border); }
.fo-stat-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 6px;
}
.fo-stat.buggy .fo-stat-label { color: var(--fo-coral); }
.fo-stat.correct .fo-stat-label { color: var(--fo-lime); }
.fo-stat-value { font-family: 'JetBrains Mono', monospace; font-size: 1.9rem; font-weight: 800; }
.fo-stat.buggy .fo-stat-value { color: var(--fo-coral); }
.fo-stat.correct .fo-stat-value { color: var(--fo-lime); }
.fo-inflation {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 14px 20px;
    border-radius: 14px;
    background: var(--fo-violet-bg);
    border: 1px solid var(--fo-violet-border);
    min-width: 130px;
}
.fo-inflation-value { font-family: 'JetBrains Mono', monospace; font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.fo-inflation-label {
    font-size: 0.68rem;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: center;
}
@media (max-width: 720px) { .fo-stats { grid-template-columns: 1fr; } }

/* ---------- SQL PREVIEW / RUN-FOR-REAL ---------- */
.fo-sql-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 9px 15px;
    border-radius: 9px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.86rem;
    margin-top: 14px;
}
.fo-sql-toggle:hover { border-color: var(--primary); color: var(--primary); }
.fo-sql-panel { display: none; margin-top: 16px; }
.fo-sql-panel.is-open { display: block; }
.fo-sql-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.fo-sql-block { border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.fo-sql-block-head {
    padding: 8px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.fo-sql-block.wrong .fo-sql-block-head { background: var(--fo-coral-bg); color: var(--fo-coral); }
.fo-sql-block.correct .fo-sql-block-head { background: var(--fo-lime-bg); color: var(--fo-lime); }
.fo-sql-block pre {
    margin: 0;
    padding: 14px;
    background: var(--code-bg);
    color: var(--code-text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre;
}
@media (max-width: 720px) { .fo-sql-pair { grid-template-columns: 1fr; } }

.fo-run-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient);
    color: #10210a;
    font-weight: 800;
    padding: 11px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
}
.fo-run-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.fo-engine-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    color: var(--text-faint);
}
.fo-engine-status .dot { width: 7px; height: 7px; border-radius: 50%; background: #9ca3af; }
.fo-engine-status.st-loading .dot { background: #f59e0b; }
.fo-engine-status.st-ready .dot { background: #22c55e; }
.fo-real-results { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.fo-real-result {
    border-radius: 10px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    text-align: center;
}
.fo-real-result .lbl {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}
.fo-real-result .val { font-family: 'JetBrains Mono', monospace; font-size: 1.5rem; font-weight: 800; }
.fo-real-result.wrong .val { color: var(--fo-coral); }
.fo-real-result.correct .val { color: var(--fo-lime); }
@media (max-width: 720px) { .fo-real-results { grid-template-columns: 1fr; } }

.fo-note { color: var(--text-faint); font-size: 0.86rem; line-height: 1.6; margin-top: 10px; }
.fo-note a { color: var(--primary); }

@media (max-width: 1024px) {
    .hero-h1 { font-size: 2.8rem; }
}

@media (max-width: 820px) {
    .hero-h1 { font-size: 2.5rem; }
    .hero-para { font-size: 1.1rem; }
}

@media (max-width: 768px) {
    .hero-h1 { font-size: 2rem; flex-direction: column; gap: 0.5rem; }
    .hero-para { font-size: 1rem; }
    .hero-stats { gap: 1rem; }
    .hero-stats span { padding: 6px 15px; font-size: 0.9rem; }
    .fo-order-row { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero { padding: 3rem 1rem; }
    .hero-h1 { font-size: 1.8rem; }
    .hero-stats span { font-size: 0.8rem; padding: 5px 12px; }
}

/* ============================================================
   MODERN HERO (Studio v2) — TOOL SUB-PAGE VARIANT.
   Intentionally distinct from the main/hub heroes: left-aligned,
   slimmer, graphite bg + cyan glow + diagonal texture + left spine.
   Appended override, markup unchanged, scoped by data-page. Copied
   verbatim from sql-joins-visualizer.css / sql-window-visualizer.css /
   sql-query-formatter.css so this tool's hero matches theirs exactly.
   ============================================================ */
body[data-page="sql-join-fanout-visualizer"] .hero{
  position:relative; margin:clamp(14px,2.5vw,26px) clamp(12px,4vw,48px);
  padding:clamp(26px,4vw,44px) clamp(24px,4vw,46px);
  border-radius:20px; text-align:left; color:#fff; overflow:hidden;
  border:1px solid rgba(255,255,255,0.08);
  background:
    radial-gradient(85% 120% at 100% -12%, rgba(34,211,238,0.20), transparent 58%),
    linear-gradient(160deg,#151b2e 0%,#0f1422 60%,#0b0f1b 100%);
  box-shadow:0 26px 60px -34px rgba(10,13,26,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
}
body[data-page="sql-join-fanout-visualizer"] .hero::before{
  content:''; position:absolute; inset:0; opacity:1; pointer-events:none;
  background-image:repeating-linear-gradient(135deg, rgba(255,255,255,0.032) 0 1px, transparent 1px 22px);
  -webkit-mask-image:linear-gradient(90deg,#000, transparent 72%);
  mask-image:linear-gradient(90deg,#000, transparent 72%);
}
body[data-page="sql-join-fanout-visualizer"] .hero::after{
  content:''; position:absolute; left:0; top:15%; bottom:15%; width:3px; border-radius:0 4px 4px 0;
  background:linear-gradient(#a3e635,#22d3ee 55%,#7c5cff); pointer-events:none;
}
body[data-page="sql-join-fanout-visualizer"] .hero-content{position:relative;z-index:1;max-width:840px;margin:0;}
body[data-page="sql-join-fanout-visualizer"] .hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;padding:6px 13px;border-radius:8px;
  border:1px solid rgba(34,211,238,0.32); background:rgba(34,211,238,0.10);
  color:#a5f0fb; -webkit-text-fill-color:#a5f0fb; font-weight:600; font-size:0.72rem; letter-spacing:0.12em; text-transform:uppercase;
}
body[data-page="sql-join-fanout-visualizer"] .hero-eyebrow i{color:#22d3ee;-webkit-text-fill-color:#22d3ee;background:none;}
body[data-page="sql-join-fanout-visualizer"] .hero h1,
body[data-page="sql-join-fanout-visualizer"] .hero .hero-h1{
  font-family:'Plus Jakarta Sans',sans-serif; font-size:clamp(1.8rem,4vw,3.1rem);
  font-weight:800; letter-spacing:-0.03em; line-height:1.1; color:#fff;
  -webkit-text-fill-color:#fff; background:none; margin-bottom:14px;
  display:flex; align-items:center; justify-content:flex-start; gap:12px; flex-wrap:wrap; text-align:left; animation:none;
}
body[data-page="sql-join-fanout-visualizer"] .hero h1 i{
  background:linear-gradient(120deg,#22d3ee,#a3e635 60%,#7c5cff);
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
  transform:translateX(-3px); padding-right:4px;
}
body[data-page="sql-join-fanout-visualizer"] .hero p,
body[data-page="sql-join-fanout-visualizer"] .hero .hero-para{
  font-family:'Plus Jakarta Sans',sans-serif; color:rgba(226,232,240,0.80);
  -webkit-text-fill-color:rgba(226,232,240,0.80); background:none; opacity:1;
  font-size:clamp(0.98rem,1.4vw,1.14rem); line-height:1.65; max-width:660px; margin:0; text-align:left;
}
body[data-page="sql-join-fanout-visualizer"] .hero-stats{display:flex;justify-content:flex-start;flex-wrap:wrap;gap:10px;margin-top:24px;}
body[data-page="sql-join-fanout-visualizer"] .hero-stats span{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:10px;
  background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.12);
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px);
  color:#dfe4f0; -webkit-text-fill-color:#dfe4f0; font-weight:600; font-size:0.86rem;
  transition:transform .2s ease, border-color .2s ease, background .2s ease;
}
body[data-page="sql-join-fanout-visualizer"] .hero-stats span:hover{transform:translateY(-2px);border-color:rgba(34,211,238,0.5);background:rgba(34,211,238,0.12);}
body[data-page="sql-join-fanout-visualizer"] .hero-stats span i{color:#22d3ee;-webkit-text-fill-color:#22d3ee;background:none;}