:root{--pg:#f2f5f9;--card:#fff;--card2:#f6fafd;--brd:rgba(200,220,240,.6);--brd2:rgba(170,200,225,.8);--txt:#1a2e3d;--txt2:#2e4e66;--txt3:#496f89;--txt4:#6a8faa;--th:#1f3d51;--th-t:#fff;--even:#f5fafd;--hvr:#e8f4fd;--tr-b:rgba(200,220,240,.5);--pill:#dceef9;--pill-t:#0c5278;--pill-b:#aacfe8;--info:#e8f3fa;--info-b:#3d7ca3;--info-t:#0d3f5a;--warn:#fef9ec;--warn-b:#e6a017;--warn-t:#5f3f0e;--ok:#e8faf2;--ok-b:#1a9c5a;--ok-t:#0b4a28;--danger:#fde8e8;--danger-b:#d64545;--danger-t:#7a1f1f;--h1:linear-gradient(145deg,#0e3050,#1a527a);--sh:0 20px 40px -15px rgba(0,32,60,.18);--enc-body:#e2e8f0;--enc-stroke:#1a2e3d;--enc-dark:#94a3b8;}
[data-theme="dark"]{--pg:#0b1826;--card:#0f2035;--card2:#132843;--brd:rgba(255,255,255,.08);--brd2:rgba(255,255,255,.15);--txt:#ddeaf8;--txt2:#8fb8d8;--txt3:#5a8aaa;--txt4:#3d6a88;--th:#091b2c;--th-t:#7dc4f0;--even:#0d1e30;--hvr:#112540;--tr-b:rgba(255,255,255,.06);--pill:rgba(59,130,246,.18);--pill-t:#93c5fd;--pill-b:rgba(59,130,246,.35);--info:rgba(59,130,246,.1);--info-b:#3b82f6;--info-t:#bfdbfe;--warn:rgba(245,158,11,.1);--warn-b:#f59e0b;--warn-t:#fcd34d;--ok:rgba(16,185,129,.1);--ok-b:#10b981;--ok-t:#6ee7b7;--danger:rgba(239,68,68,.12);--danger-b:#ef4444;--danger-t:#fca5a5;--h1:linear-gradient(135deg,#2c7be5,#0ea5e9);--sh:0 20px 40px -15px rgba(0,0,0,.5);--enc-body:#1e293b;--enc-stroke:#8fb8d8;--enc-dark:#475569;}

*{margin:0;padding:0;box-sizing:border-box;}
body{background:var(--pg);font-family:'Inter',system-ui,sans-serif;color:var(--txt);min-height:100vh;}
.container{max-width:1300px;width:100%;background:var(--card);border-radius:1.8rem;box-shadow:var(--sh);padding:2.5rem 2.3rem;border:1px solid var(--brd);margin:0 auto;}

/* Shared */
table{width:100%;border-collapse:collapse;font-size:.95rem;}
thead th{background:var(--th);color:var(--th-t);font-weight:700;font-size:.85rem;letter-spacing:.4px;text-transform:uppercase;padding:1rem 1.2rem;text-align:left;white-space:nowrap;}
tbody td{padding:.9rem 1.2rem;border-bottom:1px solid var(--tr-b);vertical-align:middle;color:var(--txt2);}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td,tbody tr:hover{background:var(--hvr);}
tbody tr:nth-child(even) td{background:var(--even);}
tbody tr:nth-child(even):hover td{background:var(--hvr);}
.table-responsive{border-radius:1rem;overflow:hidden;border:1px solid var(--brd);overflow-x:auto;margin-bottom:2rem;}

.title-section{margin-bottom:2rem;}
.title-section h1{font-size:clamp(1.4rem,3vw,2.2rem);font-weight:800;background:var(--h1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.power-range{background:var(--pill);padding:.35rem 1.1rem;border-radius:60px;font-size:1rem;font-weight:700;color:var(--pill-t);border:1px solid var(--pill-b);white-space:nowrap;-webkit-text-fill-color:var(--pill-t);}
.subhead{font-size:1rem;color:var(--txt2);margin-top:.6rem;font-weight:400;border-left:4px solid var(--info-b);padding:.4rem 1.2rem;background:var(--info);border-radius:0 8px 8px 0;width:fit-content;max-width:100%;}

.section-heading{margin:2.5rem 0 1.2rem;display:flex;align-items:center;gap:.8rem;flex-wrap:wrap;}
.section-heading h2{font-size:clamp(1.15rem,2vw,1.55rem);font-weight:700;color:var(--txt);letter-spacing:-.01em;}
.section-heading .sec-nr{font-family:'JetBrains Mono',monospace;font-size:.8rem;color:var(--info-b);background:var(--info);padding:.25rem .7rem;border-radius:30px;border:1px solid var(--pill-b);font-weight:600;}
.section-sub{font-size:.92rem;color:var(--txt3);margin-bottom:1rem;max-width:900px;line-height:1.6;}
.category{font-weight:700;color:var(--txt);font-size:.95rem;}
.usage{font-size:.9rem;color:var(--txt2);line-height:1.4;}

/* Stats strip */
.stats-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:0;background:var(--card2);border:1px solid var(--brd);border-radius:1rem;overflow:hidden;margin-bottom:2rem;}
.stat-item{padding:1.1rem 1rem;text-align:center;border-right:1px solid var(--brd);}
.stat-item:last-child{border-right:none;}
.stat-num{font-size:1.7rem;font-weight:800;background:var(--h1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;letter-spacing:-.02em;}
.stat-label{font-family:'JetBrains Mono',monospace;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--txt3);margin-top:.35rem;}

/* IP CODE ANATOMY */
.anatomy-wrap{background:linear-gradient(135deg,var(--card2) 0%,var(--info) 100%);border:1px solid var(--brd);border-radius:1.5rem;padding:2.5rem 1.5rem 2rem;margin-bottom:2rem;position:relative;overflow:hidden;}
.anatomy-wrap::before{content:"";position:absolute;top:-50px;right:-50px;width:220px;height:220px;background:radial-gradient(circle,var(--info-b) 0%,transparent 70%);opacity:.1;}
.ip-big{display:flex;justify-content:center;gap:.4rem;font-family:'JetBrains Mono',monospace;font-weight:800;letter-spacing:-.04em;margin-bottom:2rem;position:relative;z-index:1;flex-wrap:wrap;}
.ip-char{font-size:clamp(3.5rem,10vw,6rem);background:var(--card);padding:.5rem 1.3rem;border-radius:1rem;border:2px solid var(--brd2);color:var(--txt);line-height:1;box-shadow:0 8px 24px -6px rgba(0,50,100,.15);position:relative;transition:all .3s ease;}
.ip-char:hover{transform:translateY(-6px);border-color:var(--info-b);box-shadow:0 14px 32px -6px rgba(59,130,246,.35);}
.ip-char.letters{color:var(--info-b);}
.ip-char.digit-solid{color:#c2410c;border-color:#f97316;}
.ip-char.digit-liquid{color:#0369a1;border-color:#3b82f6;}
.ip-char-label{position:absolute;top:-20px;left:50%;transform:translateX(-50%);font-size:.68rem;font-family:'JetBrains Mono',monospace;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--info-b);background:var(--card);padding:.25rem .6rem;border-radius:20px;border:1px solid var(--brd2);white-space:nowrap;}
.ip-legend-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;position:relative;z-index:1;}
.ip-leg{background:var(--card);border-radius:10px;padding:1rem 1.1rem;border:1px solid var(--brd);border-left:4px solid var(--info-b);}
.ip-leg.solid{border-left-color:#f97316;}
.ip-leg.liquid{border-left-color:#3b82f6;}
.ip-leg-title{font-weight:700;font-size:.95rem;color:var(--txt);margin-bottom:.3rem;}
.ip-leg-desc{font-size:.82rem;color:var(--txt2);line-height:1.5;}

/* IP digit cards */
.ip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.8rem;margin-bottom:2rem;}
.ip-card{background:var(--card2);border:1px solid var(--brd);border-radius:1rem;padding:1.2rem 1rem;text-align:center;transition:all .25s ease;position:relative;overflow:hidden;}
.ip-card:hover{transform:translateY(-3px);border-color:var(--info-b);box-shadow:0 10px 20px -6px rgba(0,0,0,.18);}
.ip-card-num{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:14px;font-family:'JetBrains Mono',monospace;font-size:1.6rem;font-weight:800;color:#fff;margin-bottom:.7rem;box-shadow:0 4px 10px -2px rgba(0,0,0,.2);}
.ip-card.solid .ip-card-num{background:linear-gradient(135deg,#f97316,#c2410c);}
.ip-card.liquid .ip-card-num{background:linear-gradient(135deg,#3b82f6,#0369a1);}
.ip-card-icon{width:70px;height:70px;margin:0 auto 1rem;display:block;}
.ip-card h4{font-size:.92rem;font-weight:700;color:var(--txt);margin-bottom:.3rem;line-height:1.2;}
.ip-card p{font-size:.78rem;color:var(--txt2);line-height:1.4;}

/* Common IP combinations */
.combo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-bottom:2rem;}
.combo-card{background:var(--card2);border:1px solid var(--brd);border-radius:1.1rem;padding:1.5rem 1.3rem;text-align:center;transition:all .3s ease;position:relative;overflow:hidden;}
.combo-card::after{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#f97316,#3b82f6);}
.combo-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px -8px rgba(0,0,0,.2);border-color:var(--info-b);}
.combo-code{font-family:'JetBrains Mono',monospace;font-size:2.4rem;font-weight:800;background:var(--h1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;letter-spacing:-.04em;margin-bottom:.3rem;}
.combo-scene{width:130px;height:110px;margin:.8rem auto;display:block;}
.combo-title{font-size:1rem;font-weight:700;color:var(--txt);margin-bottom:.3rem;}
.combo-desc{font-size:.82rem;color:var(--txt2);line-height:1.5;margin-bottom:.8rem;min-height:50px;}
.combo-app{font-family:'JetBrains Mono',monospace;font-size:.72rem;font-weight:600;color:var(--pill-t);background:var(--pill);padding:.35rem .8rem;border-radius:30px;border:1px solid var(--pill-b);display:inline-block;letter-spacing:.04em;}

/* IK levels */
.ik-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.9rem;margin-bottom:2rem;}
.ik-card{background:var(--card2);border:1px solid var(--brd);border-radius:1rem;padding:1.3rem 1.1rem;position:relative;transition:all .25s ease;}
.ik-card:hover{transform:translateY(-3px);border-color:var(--warn-b);}
.ik-code{font-family:'JetBrains Mono',monospace;font-size:1.6rem;font-weight:800;color:var(--warn-t);background:var(--warn);padding:.3rem .8rem;border-radius:10px;display:inline-block;border:1px solid var(--warn-b);margin-bottom:.7rem;letter-spacing:-.02em;}
.ik-visual{display:flex;align-items:flex-end;gap:.4rem;margin:.8rem 0;min-height:60px;}
.ik-weight-bar{flex:1;background:linear-gradient(to top,#dc2626,#f59e0b);border-radius:4px 4px 0 0;border:1px solid var(--brd2);position:relative;transition:all .3s ease;}
.ik-weight-label{position:absolute;top:-20px;left:50%;transform:translateX(-50%);font-family:'JetBrains Mono',monospace;font-size:.68rem;font-weight:700;color:var(--txt);white-space:nowrap;}
.ik-specs{display:grid;grid-template-columns:1fr 1fr;gap:.4rem;font-size:.78rem;margin-top:.7rem;}
.ik-spec-l{color:var(--txt3);font-family:'JetBrains Mono',monospace;}
.ik-spec-v{color:var(--txt);font-weight:700;text-align:right;font-family:'JetBrains Mono',monospace;}
.ik-desc{font-size:.82rem;color:var(--txt2);line-height:1.4;margin-top:.7rem;padding-top:.7rem;border-top:1px dashed var(--brd2);}

/* Electrical classes */
.eclass-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;margin-bottom:2rem;}
.eclass-card{background:var(--card2);border:2px solid var(--brd);border-radius:1.2rem;padding:1.5rem 1.4rem;position:relative;transition:all .3s ease;overflow:hidden;}
.eclass-card.c0{border-top:6px solid var(--danger-b);}
.eclass-card.c1{border-top:6px solid #f59e0b;}
.eclass-card.c2{border-top:6px solid #10b981;}
.eclass-card.c3{border-top:6px solid #3b82f6;}
.eclass-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px -8px rgba(0,0,0,.2);}
.eclass-head{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;}
.eclass-symbol{width:66px;height:66px;flex-shrink:0;background:var(--card);border-radius:14px;border:2px solid var(--brd2);display:flex;align-items:center;justify-content:center;padding:.4rem;}
.eclass-roman{font-family:'JetBrains Mono',monospace;font-size:1.5rem;font-weight:800;color:var(--txt);line-height:1;}
.eclass-roman.banned{text-decoration:line-through;text-decoration-thickness:3px;color:var(--danger-b);}
.eclass-card h3{font-size:1.1rem;font-weight:700;color:var(--txt);line-height:1.2;}
.eclass-card h3 small{display:block;font-size:.72rem;color:var(--txt3);text-transform:uppercase;letter-spacing:.08em;margin-top:.2rem;font-weight:600;}
.eclass-status{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:.68rem;font-weight:800;letter-spacing:.12em;padding:.25rem .7rem;border-radius:30px;text-transform:uppercase;margin-bottom:.7rem;}
.eclass-status.banned{background:var(--danger);color:var(--danger-t);border:1px solid var(--danger-b);}
.eclass-status.common{background:var(--ok);color:var(--ok-t);border:1px solid var(--ok-b);}
.eclass-status.low{background:var(--info);color:var(--info-t);border:1px solid var(--info-b);}
.eclass-card p{font-size:.88rem;color:var(--txt2);line-height:1.55;margin-bottom:.7rem;}
.eclass-feat{margin-top:.8rem;padding-top:.8rem;border-top:1px dashed var(--brd2);}
.eclass-feat li{list-style:none;font-size:.84rem;color:var(--txt2);padding:.25rem 0;display:flex;align-items:flex-start;gap:.5rem;}
.eclass-feat li::before{content:"•";color:var(--info-b);font-weight:700;flex-shrink:0;}
.eclass-examples{background:var(--card);padding:.7rem 1rem;border-radius:8px;border:1px solid var(--brd);margin-top:.8rem;font-size:.8rem;color:var(--txt2);}
.eclass-examples strong{color:var(--txt);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;display:block;margin-bottom:.3rem;}

/* Compare matrix */
.matrix-wrap{background:var(--card2);border:1px solid var(--brd);border-radius:1.2rem;padding:1.5rem;margin-bottom:2rem;overflow-x:auto;}
.matrix-wrap table{min-width:640px;}
.matrix-wrap td, .matrix-wrap th{font-size:.88rem;}
.matrix-wrap td.check{text-align:center;font-size:1.2rem;}
.matrix-wrap td.check.yes{color:var(--ok-b);}
.matrix-wrap td.check.no{color:var(--danger-b);}
.matrix-wrap td.check.partial{color:var(--warn-b);}

/* Scenario cards */
.scenario-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.2rem;margin-bottom:2rem;}
.scenario-card{background:var(--card2);border:1px solid var(--brd);border-radius:1.1rem;padding:1.5rem;transition:all .3s ease;position:relative;}
.scenario-card:hover{border-color:var(--info-b);transform:translateY(-3px);box-shadow:0 10px 22px -6px rgba(0,0,0,.18);}
.scenario-icon{width:54px;height:54px;margin-bottom:.8rem;}
.scenario-card h3{font-size:1.05rem;font-weight:700;color:var(--txt);margin-bottom:.3rem;}
.scenario-card p{font-size:.85rem;color:var(--txt2);line-height:1.5;margin-bottom:.9rem;}
.scenario-tags{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.8rem;padding-top:.8rem;border-top:1px dashed var(--brd2);}
.scenario-tag{font-family:'JetBrains Mono',monospace;font-size:.75rem;font-weight:700;padding:.25rem .7rem;border-radius:30px;background:var(--info);color:var(--info-t);border:1px solid var(--info-b);}
.scenario-tag.ip{background:#ffedd5;color:#9a3412;border-color:#f97316;}
.scenario-tag.ik{background:var(--warn);color:var(--warn-t);border-color:var(--warn-b);}
.scenario-tag.ec{background:var(--ok);color:var(--ok-t);border-color:var(--ok-b);}
[data-theme="dark"] .scenario-tag.ip{background:rgba(249,115,22,.15);color:#fb923c;}

/* Additional letters table */
.letters-wrap{background:var(--card2);border:1px solid var(--brd);border-radius:1.1rem;padding:1.3rem;margin-bottom:2rem;}
.letters-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:.8rem;}
.letter-item{display:flex;align-items:center;gap:.8rem;padding:.7rem .9rem;background:var(--card);border-radius:8px;border:1px solid var(--brd);transition:all .2s ease;}
.letter-item:hover{border-color:var(--info-b);transform:translateX(3px);}
.letter-tag{font-family:'JetBrains Mono',monospace;font-size:1.4rem;font-weight:800;color:var(--info-b);background:var(--info);padding:.3rem .8rem;border-radius:8px;border:1px solid var(--pill-b);flex-shrink:0;min-width:42px;text-align:center;}
.letter-desc{font-size:.85rem;color:var(--txt2);line-height:1.4;}
.letter-desc strong{color:var(--txt);}

/* Visual encapsulation */
.enc-svg{width:100%;height:100%;}
.enc-svg .enc-body-fill{fill:var(--enc-body);stroke:var(--enc-stroke);stroke-width:2;}
.enc-svg .enc-dark-fill{fill:var(--enc-dark);}
.enc-svg .water{fill:#3b82f6;opacity:.7;}
.enc-svg .dust{fill:#a78bfa;opacity:.6;}

/* Key insight box */
.insight-box{background:var(--info);border-left:4px solid var(--info-b);border-radius:10px;padding:1.1rem 1.3rem;margin-bottom:2rem;font-size:.92rem;color:var(--info-t);line-height:1.6;}
.insight-box strong{color:var(--txt);}
.insight-box code{font-family:'JetBrains Mono',monospace;background:var(--card);padding:.15rem .5rem;border-radius:5px;font-weight:700;color:var(--pill-t);border:1px solid var(--brd);}

@media(max-width:900px){
  .stat-item{border-right:none;border-bottom:1px solid var(--brd);}
  .stat-item:last-child{border-bottom:none;}
}
@media(max-width:700px){
  .container{padding:1.5rem 1rem;}
  .title-section h1{font-size:1.6rem;}
  .ip-char{font-size:2.8rem;padding:.4rem .9rem;}
  thead th,tbody td{padding:.65rem .7rem;font-size:.82rem;}
}