:root {
  --bg: #0a0c10;
  --bg2: #111318;
  --bg3: #181c24;
  --bg4: #1e2330;
  --border: #252b3a;
  --border2: #2e3547;
  --text: #e8eaf0;
  --text2: #9ba3ba;
  --text3: #636b82;
  --accent: #4f8ef7;
  --accent2: #7c5cfc;
  --accent3: #00d4aa;
  --accent4: #f7a84f;
  --accent5: #f75f5f;
  --accent6: #a8e063;
  --gold: #f5c842;
  --card-bg: #13171f;
  --card-hover: #181e2a;
  --nav-h: 60px;
  --radius: 12px;
  --radius2: 8px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--border2) var(--bg)}
body{background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;font-size:15px;line-height:1.65;min-height:100vh;overflow-x:hidden}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:'Syne',sans-serif;font-weight:700;line-height:1.2}
code,kbd{font-family:'JetBrains Mono',monospace;font-size:.85em}

/* ── NAV ── */
#nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);background:rgba(10,12,16,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:1000;display:flex;align-items:center;gap:0;padding:0 20px}
.nav-logo{font-family:'Syne',sans-serif;font-weight:800;font-size:1.1rem;color:var(--accent);white-space:nowrap;margin-right:24px;letter-spacing:-.5px}
.nav-logo span{color:var(--gold)}
.nav-links{display:flex;gap:2px;overflow-x:auto;flex:1;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{padding:6px 12px;border-radius:6px;color:var(--text2);font-size:.8rem;font-weight:500;white-space:nowrap;transition:all .2s;letter-spacing:.3px}
.nav-links a:hover,.nav-links a.active{color:var(--accent);background:rgba(79,142,247,.1)}
.nav-search{margin-left:16px;position:relative;flex-shrink:0}
.nav-search input{background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--text);padding:7px 14px 7px 34px;font-size:.83rem;width:200px;outline:none;transition:all .2s;font-family:'DM Sans',sans-serif}
.nav-search input:focus{border-color:var(--accent);width:260px;background:var(--bg4)}
.nav-search svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);opacity:.5;pointer-events:none}
#search-results{position:absolute;top:calc(100% + 6px);right:0;width:340px;background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius);max-height:400px;overflow-y:auto;z-index:2000;display:none;box-shadow:0 20px 60px rgba(0,0,0,.6)}
#search-results.open{display:block}
.sr-item{padding:10px 16px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .15s}
.sr-item:hover{background:var(--bg4)}
.sr-item h5{font-size:.85rem;color:var(--text);font-family:'Syne',sans-serif;font-weight:600}
.sr-item p{font-size:.75rem;color:var(--text3);margin-top:2px}
.sr-tag{display:inline-block;font-size:.65rem;padding:1px 6px;border-radius:4px;background:rgba(79,142,247,.15);color:var(--accent);margin-right:4px;margin-top:4px}

/* ── HERO ── */
#hero{padding:120px 24px 60px;text-align:center;position:relative;overflow:hidden}
#hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(79,142,247,.12) 0%,transparent 70%)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(245,200,66,.1);border:1px solid rgba(245,200,66,.3);border-radius:20px;padding:6px 16px;font-size:.78rem;color:var(--gold);font-weight:600;margin-bottom:24px;letter-spacing:.5px}
.hero-badge::before{content:'★';font-size:.9rem}
#hero h1{font-size:clamp(2rem,5vw,3.8rem);font-weight:800;line-height:1.05;letter-spacing:-1.5px;margin-bottom:16px}
#hero h1 .g1{background:linear-gradient(135deg,#4f8ef7,#7c5cfc);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
#hero h1 .g2{background:linear-gradient(135deg,#f5c842,#f7a84f);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
#hero p{color:var(--text2);font-size:1.05rem;max-width:600px;margin:0 auto 36px;line-height:1.7}
.hero-stats{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;margin-bottom:48px}
.stat{text-align:center}
.stat-n{font-family:'Syne',sans-serif;font-size:2rem;font-weight:800;color:var(--accent)}
.stat-l{font-size:.75rem;color:var(--text3);text-transform:uppercase;letter-spacing:.8px;margin-top:2px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.hero-tag{padding:6px 14px;border-radius:20px;border:1px solid var(--border2);font-size:.78rem;color:var(--text2);transition:all .2s;cursor:pointer}
.hero-tag:hover{border-color:var(--accent);color:var(--accent);background:rgba(79,142,247,.08)}

/* ── QUICK TOOLS ── */
.quick-tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;max-width:1100px;margin:0 auto 60px;padding:0 24px}
.qt-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;cursor:pointer;transition:all .25s;position:relative;overflow:hidden}
.qt-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px}
.qt-card.c1::before{background:linear-gradient(90deg,var(--accent),var(--accent2))}
.qt-card.c2::before{background:linear-gradient(90deg,var(--accent3),var(--accent))}
.qt-card.c3::before{background:linear-gradient(90deg,var(--gold),var(--accent4))}
.qt-card.c4::before{background:linear-gradient(90deg,var(--accent5),#ff9f7f)}
.qt-card.c5::before{background:linear-gradient(90deg,var(--accent6),var(--accent3))}
.qt-card.c6::before{background:linear-gradient(90deg,var(--accent2),var(--accent5))}
.qt-card:hover{transform:translateY(-3px);border-color:var(--border2);background:var(--card-hover);box-shadow:0 12px 40px rgba(0,0,0,.4)}
.qt-icon{font-size:1.6rem;margin-bottom:10px}
.qt-card h4{font-size:.88rem;font-weight:700;color:var(--text);margin-bottom:4px}
.qt-card p{font-size:.75rem;color:var(--text3);line-height:1.4}

/* ── SECTION ── */
.section{padding:48px 24px;max-width:1100px;margin:0 auto}
.section-header{display:flex;align-items:baseline;gap:16px;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.section-header h2{font-size:1.6rem;letter-spacing:-.5px}
.section-num{font-family:'JetBrains Mono',monospace;font-size:.75rem;color:var(--accent);background:rgba(79,142,247,.1);padding:3px 10px;border-radius:4px;border:1px solid rgba(79,142,247,.2)}
.section-desc{color:var(--text3);font-size:.85rem;margin-top:4px;margin-bottom:20px}

/* ── ACCORDION ── */
.acc{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:border-color .2s}
.acc:hover{border-color:var(--border2)}
.acc.open{border-color:var(--accent);box-shadow:0 0 0 1px rgba(79,142,247,.15)}
.acc-head{display:flex;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;background:var(--card-bg);transition:background .2s;user-select:none}
.acc.open .acc-head{background:var(--bg3)}
.acc-head:hover{background:var(--bg3)}
.acc-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}
.acc-head h3{flex:1;font-size:.95rem;font-weight:700;color:var(--text)}
.acc-meta{display:flex;gap:6px;align-items:center;flex-shrink:0}
.badge{display:inline-block;font-size:.65rem;padding:2px 8px;border-radius:4px;font-weight:600;letter-spacing:.3px}
.badge-hot{background:rgba(247,95,95,.15);color:var(--accent5);border:1px solid rgba(247,95,95,.25)}
.badge-core{background:rgba(79,142,247,.12);color:var(--accent);border:1px solid rgba(79,142,247,.2)}
.badge-calc{background:rgba(0,212,170,.1);color:var(--accent3);border:1px solid rgba(0,212,170,.2)}
.badge-new{background:rgba(168,224,99,.1);color:var(--accent6);border:1px solid rgba(168,224,99,.2)}
.acc-arrow{color:var(--text3);transition:transform .3s;flex-shrink:0;margin-left:8px}
.acc.open .acc-arrow{transform:rotate(180deg)}
.acc-body{display:none;padding:0 20px 20px;background:var(--card-bg);animation:fadeIn .25s ease}
.acc.open .acc-body{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}

/* ── TABS ── */
.tabs{margin-top:16px}
.tab-nav{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:16px;overflow-x:auto;scrollbar-width:none}
.tab-nav::-webkit-scrollbar{display:none}
.tab-btn{padding:8px 14px;border:none;background:none;color:var(--text3);font-size:.8rem;font-family:'Syne',sans-serif;font-weight:600;cursor:pointer;border-bottom:2px solid transparent;transition:all .2s;white-space:nowrap;margin-bottom:-1px}
.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}
.tab-btn:hover{color:var(--text)}
.tab-panel{display:none}.tab-panel.active{display:block}

/* ── CARDS INSIDE CONTENT ── */
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:16px 0}
.info-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius2);padding:14px 16px}
.info-card h5{font-size:.8rem;font-weight:700;margin-bottom:8px;color:var(--text)}
.info-card ul{list-style:none;padding:0}
.info-card ul li{font-size:.8rem;color:var(--text2);padding:3px 0;border-bottom:1px solid var(--border);display:flex;gap:6px;align-items:flex-start}
.info-card ul li::before{content:'›';color:var(--accent);flex-shrink:0}
.info-card ul li:last-child{border-bottom:none}

/* ── CALLOUT BOXES ── */
.callout{border-radius:var(--radius2);padding:14px 16px;margin:14px 0;font-size:.83rem;border-left:3px solid}
.callout-trap{background:rgba(247,95,95,.06);border-color:var(--accent5);color:var(--text2)}
.callout-trap strong{color:var(--accent5)}
.callout-tip{background:rgba(0,212,170,.06);border-color:var(--accent3);color:var(--text2)}
.callout-tip strong{color:var(--accent3)}
.callout-exam{background:rgba(79,142,247,.06);border-color:var(--accent);color:var(--text2)}
.callout-exam strong{color:var(--accent)}
.callout-gold{background:rgba(245,200,66,.06);border-color:var(--gold);color:var(--text2)}
.callout-gold strong{color:var(--gold)}
.callout-warn{background:rgba(247,168,79,.06);border-color:var(--accent4);color:var(--text2)}
.callout-warn strong{color:var(--accent4)}

/* ── EXAMPLE BOXES ── */
.example-box{background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius2);padding:16px;margin:14px 0}
.example-box .ex-label{font-size:.7rem;font-weight:700;color:var(--accent4);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}
.example-box p,.example-box li{font-size:.83rem;color:var(--text2);line-height:1.6}
.scenario-box{background:linear-gradient(135deg,rgba(79,142,247,.04),rgba(124,92,252,.04));border:1px solid rgba(79,142,247,.2);border-radius:var(--radius2);padding:16px;margin:14px 0}
.scenario-box .sc-label{font-size:.7rem;font-weight:700;color:var(--accent2);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}
.answer-box{background:rgba(0,212,170,.04);border:1px solid rgba(0,212,170,.2);border-radius:var(--radius2);padding:16px;margin:14px 0}
.answer-box .ans-label{font-size:.7rem;font-weight:700;color:var(--accent3);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}

/* ── TABLES ── */
.tbl{width:100%;border-collapse:collapse;margin:14px 0;font-size:.8rem}
.tbl th{background:var(--bg4);color:var(--text2);padding:8px 12px;text-align:left;font-weight:600;font-family:'Syne',sans-serif;border-bottom:1px solid var(--border2);font-size:.75rem;text-transform:uppercase;letter-spacing:.5px}
.tbl td{padding:8px 12px;border-bottom:1px solid var(--border);color:var(--text2);vertical-align:top;line-height:1.5}
.tbl tr:hover td{background:rgba(255,255,255,.02)}
.tbl td:first-child{color:var(--text);font-weight:500}

/* ── FORMULA BOXES ── */
.formula{background:var(--bg4);border:1px solid var(--border2);border-radius:var(--radius2);padding:14px 18px;margin:14px 0;font-family:'JetBrains Mono',monospace;font-size:.85rem;color:var(--accent3);line-height:1.8}
.formula span{color:var(--text3);font-size:.75rem}

/* ── KPI GRID ── */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin:14px 0}
.kpi-item{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius2);padding:10px 12px;text-align:center}
.kpi-item .ki-val{font-family:'Syne',sans-serif;font-size:.85rem;font-weight:700;color:var(--accent3);margin-bottom:4px}
.kpi-item .ki-lbl{font-size:.7rem;color:var(--text3);line-height:1.3}

/* ── BSC VISUAL ── */
.bsc-map{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}
.bsc-quad{border-radius:var(--radius2);padding:14px;border:1px solid}
.bsc-q1{background:rgba(79,142,247,.06);border-color:rgba(79,142,247,.25)}
.bsc-q2{background:rgba(0,212,170,.06);border-color:rgba(0,212,170,.25)}
.bsc-q3{background:rgba(124,92,252,.06);border-color:rgba(124,92,252,.25)}
.bsc-q4{background:rgba(245,200,66,.06);border-color:rgba(245,200,66,.25)}
.bsc-quad h5{font-size:.8rem;font-weight:700;margin-bottom:8px}
.bsc-q1 h5{color:var(--accent)}
.bsc-q2 h5{color:var(--accent3)}
.bsc-q3 h5{color:var(--accent2)}
.bsc-q4 h5{color:var(--gold)}
.bsc-quad ul{list-style:none;padding:0}
.bsc-quad ul li{font-size:.75rem;color:var(--text2);padding:2px 0;padding-left:12px;position:relative}
.bsc-quad ul li::before{content:'•';position:absolute;left:0;opacity:.5}
.bsc-center{grid-column:1/-1;background:rgba(247,168,79,.06);border:1px solid rgba(247,168,79,.25);border-radius:var(--radius2);padding:10px 14px;text-align:center;font-size:.8rem;color:var(--accent4);font-weight:700}

/* ── MIND MAP ── */
.mind-map{position:relative;margin:20px 0;min-height:200px;background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px}
.mm-center{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-radius:var(--radius2);padding:10px 18px;font-family:'Syne',sans-serif;font-size:.85rem;font-weight:700;text-align:center;z-index:2;position:relative}
.mm-branch{background:var(--bg4);border:1px solid var(--border2);border-radius:var(--radius2);padding:8px 14px;font-size:.75rem;color:var(--text2);text-align:center;position:relative}
.mm-branch::before{content:'—';color:var(--text3);margin-right:4px}

/* ── DECISION TREE ── */
.dtree{margin:16px 0}
.dt-node{background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius2);padding:10px 14px;font-size:.8rem;color:var(--text2);margin-bottom:8px;position:relative;padding-left:20px}
.dt-node::before{content:'▶';color:var(--accent);position:absolute;left:6px;top:50%;transform:translateY(-50%);font-size:.7rem}
.dt-node.q{border-color:var(--accent);color:var(--text);font-weight:600;background:rgba(79,142,247,.06)}
.dt-node.q::before{content:'?';font-weight:800}
.dt-yes{border-color:var(--accent3);color:var(--accent3)}
.dt-yes::before{content:'✓';color:var(--accent3)}
.dt-no{border-color:var(--accent5);color:var(--accent5)}
.dt-no::before{content:'✗';color:var(--accent5)}
.dt-indent{margin-left:20px}

/* ── MODAL ── */
#modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:3000;align-items:center;justify-content:center;padding:20px}
#modal-overlay.open{display:flex}
#modal{background:var(--bg2);border:1px solid var(--border2);border-radius:var(--radius);max-width:700px;width:100%;max-height:85vh;overflow-y:auto;position:relative}
.modal-head{padding:20px 24px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:var(--bg2)}
.modal-head h2{font-size:1.15rem}
.modal-close{background:var(--bg3);border:1px solid var(--border);border-radius:6px;color:var(--text3);width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1rem;flex-shrink:0}
.modal-close:hover{color:var(--text);border-color:var(--border2)}
.modal-body{padding:20px 24px}

/* ── COMMAND VERBS ── */
.cv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;margin:16px 0}
.cv-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius2);padding:14px}
.cv-card .cv-verb{font-family:'Syne',sans-serif;font-size:1rem;font-weight:800;color:var(--accent);margin-bottom:6px}
.cv-card .cv-desc{font-size:.75rem;color:var(--text2);line-height:1.5}
.cv-card .cv-depth{font-size:.7rem;color:var(--accent3);margin-top:6px;font-weight:600}

/* ── PROGRESS DOTS ── */
.difficulty{display:flex;gap:3px;align-items:center;margin-left:auto}
.d-dot{width:6px;height:6px;border-radius:50%;background:var(--border2)}
.d-dot.on{background:var(--accent4)}

/* ── RESPONSIVE ── */
@media(max-width:768px){
  .nav-links{display:none}
  #hero h1{font-size:2rem}
  .bsc-map{grid-template-columns:1fr}
  .info-grid{grid-template-columns:1fr}
  .hero-stats{gap:20px}
  .nav-search input{width:160px}
  .nav-search input:focus{width:200px}
  .cv-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .cv-grid{grid-template-columns:1fr}
  .quick-tools{grid-template-columns:1fr 1fr}
}

/* ── UTILITIES ── */
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt20{margin-top:20px}
.text-accent{color:var(--accent)}.text-gold{color:var(--gold)}.text-green{color:var(--accent3)}.text-red{color:var(--accent5)}
.small{font-size:.78rem;color:var(--text3)}
.tag-pill{display:inline-block;font-size:.65rem;padding:2px 8px;border-radius:12px;background:var(--bg4);border:1px solid var(--border);color:var(--text3);margin:2px}
ul.styled{list-style:none;padding:0}ul.styled li{padding:4px 0;border-bottom:1px solid var(--border);color:var(--text2);font-size:.83rem;padding-left:14px;position:relative}ul.styled li::before{content:'›';color:var(--accent);position:absolute;left:0}ul.styled li:last-child{border-bottom:none}
ol.styled{padding-left:20px}ol.styled li{color:var(--text2);font-size:.83rem;margin-bottom:6px;line-height:1.5}
p.body{color:var(--text2);font-size:.85rem;line-height:1.7;margin-bottom:10px}
strong{color:var(--text);font-weight:600}
hr.divider{border:none;border-top:1px solid var(--border);margin:16px 0}

/* ── STICKY SIDEBAR SCROLL INDICATOR ── */
#progress-bar{position:fixed;top:var(--nav-h);left:0;right:0;height:2px;background:var(--border);z-index:999}
#progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));width:0%;transition:width .1s}

/* ANIMATIONS */
.fade-up{opacity:0;transform:translateY(20px);animation:fadeUp .5s ease forwards}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.section{animation:fadeUp .4s ease}