:root{
  --ink:#071426;--text:#132238;--muted:#64758a;--line:#dbe7ef;--soft:#f5f9fc;--paper:#ffffff;
  --green:#08b884;--green2:#30d79d;--cyan:#13a9df;--blue:#155b9d;--navy:#071426;
  --yellow:#f6b73c;--violet:#8a5bb7;--red:#e84c3d;--grid:#253547;
  --shadow:0 24px 70px rgba(18,37,58,.12);--small-shadow:0 14px 38px rgba(18,37,58,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:#f7fbff;min-height:100vh;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;background:radial-gradient(circle at 6% 8%,rgba(8,184,132,.18),transparent 30%),radial-gradient(circle at 92% 4%,rgba(19,169,223,.18),transparent 28%),linear-gradient(115deg,transparent 0 47%,rgba(8,184,132,.10) 47% 48.3%,transparent 48.3% 100%)}
body:after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:linear-gradient(rgba(8,19,32,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(8,19,32,.045) 1px,transparent 1px);background-size:38px 38px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.55),transparent 82%)}
button,input,select,textarea{font:inherit}
.site-header{height:86px;padding:0 clamp(18px,4vw,44px);display:flex;align-items:center;gap:34px;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid rgba(217,229,238,.92);position:sticky;top:0;z-index:30}
.brand-logo{display:flex;align-items:center;line-height:0;flex:0 0 auto}.brand-logo img{display:block;width:260px;height:auto;object-fit:contain}.main-nav{display:flex;align-items:center;gap:28px;margin-left:16px;flex:1}.main-nav a{font-size:14px;color:#172438;text-decoration:none;font-weight:850}.main-nav a:hover{color:var(--green)}
.header-actions{display:flex;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}.header-actions button{border:0;background:#fff;color:#587086;font-weight:850;padding:13px 18px;cursor:pointer}.header-actions button.active{background:var(--ink);color:#fff}
main{width:min(1340px,calc(100% - 44px));margin:0 auto;padding:64px 0 80px}.hero-shell{display:grid;grid-template-columns:minmax(340px,.92fr) minmax(520px,1.2fr);gap:54px;align-items:center;margin-bottom:54px}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:12px;color:var(--green);font-size:13px;font-weight:950;letter-spacing:.18em;text-transform:uppercase}.eyebrow:before,.section-kicker:before{content:"";width:38px;height:2px;background:var(--green)}
h1{font-size:clamp(44px,5.6vw,76px);line-height:.94;margin:28px 0 22px;color:var(--ink);letter-spacing:-.07em;font-weight:950;max-width:760px}.hero-copy p{font-size:18px;line-height:1.65;color:#42546a;max-width:640px;margin:0 0 28px}.trust-row{display:flex;flex-wrap:wrap;gap:18px 28px;margin-top:32px}.trust-row span{display:inline-flex;align-items:center;gap:9px;font-size:14px;font-weight:900;color:var(--ink)}.trust-row span:before{content:"";width:18px;height:18px;border:3px solid var(--green);border-radius:50%;box-shadow:inset 0 0 0 4px #fff}
.hero-example{position:relative;background:linear-gradient(140deg,rgba(255,255,255,.95),rgba(235,250,255,.86));border:1px solid rgba(217,229,238,.9);box-shadow:var(--shadow);min-height:420px;padding:32px;display:flex;flex-direction:column;justify-content:center;overflow:hidden}.hero-example:before{content:"";position:absolute;inset:0;background:linear-gradient(112deg,transparent 0 54%,rgba(255,255,255,.60) 54% 71%,transparent 71%);pointer-events:none}.example-label{position:absolute;left:34px;bottom:30px;z-index:3;border-left:4px solid var(--green);background:rgba(255,255,255,.92);padding:12px 16px;box-shadow:var(--small-shadow)}.example-label span{display:block;font-size:13px;color:#243246;font-weight:950;text-transform:uppercase;letter-spacing:.12em}.example-label small{display:block;margin-top:4px;color:var(--green);font-weight:850}.example-board-wrap{height:300px;display:flex;align-items:center;justify-content:center;perspective:1200px}.example-board{position:relative;width:82%;max-width:650px;height:190px;border-radius:10px;background:linear-gradient(145deg,#0c7c4e,#0d6945 52%,#07543a);box-shadow:0 34px 45px rgba(9,60,58,.23),inset 0 0 0 2px rgba(255,255,255,.28),inset 0 -18px 36px rgba(0,0,0,.18);transform:rotateX(58deg) rotateZ(-4deg);transform-style:preserve-3d;animation:sampleFloat 7s ease-in-out infinite}.example-board:before{content:"";position:absolute;inset:10px;border:1px solid rgba(250,225,130,.35);border-radius:7px}.example-board:after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle,rgba(248,207,83,.38) 1.5px,transparent 1.7px);background-size:20px 20px;opacity:.45}.hole{position:absolute;width:18px;height:18px;border-radius:50%;background:#182434;border:5px solid #f1d886;box-shadow:0 4px 0 rgba(0,0,0,.25);z-index:4}.h1{left:18px;top:18px}.h2{right:18px;top:18px}.h3{left:18px;bottom:18px}.h4{right:18px;bottom:18px}.trace{position:absolute;height:5px;border-radius:10px;background:rgba(201,179,69,.65);z-index:2;transform-origin:left center}.t1{left:60px;top:58px;width:420px}.t2{left:120px;top:112px;width:360px;transform:rotate(-10deg)}.t3{left:258px;top:78px;width:260px;transform:rotate(18deg)}.t4{left:390px;top:128px;width:130px}.t5{left:56px;top:138px;width:230px;transform:rotate(12deg)}
.ex{position:absolute;display:flex;align-items:center;justify-content:center;z-index:5;transform:translateZ(30px);font-size:11px;color:#fff;font-style:normal;border-radius:6px;box-shadow:0 10px 16px rgba(0,0,0,.32)}.ex.terminal{width:58px;height:54px;background:linear-gradient(#3aa0f2,#0c56a0);border:4px solid #124678}.ex.terminal:before,.ex.terminal:after{content:"";position:absolute;left:50%;transform:translateX(-50%);width:24px;height:24px;border-radius:50%;background:#061422;border:4px solid #9bd2ff}.ex.terminal:before{top:5px}.ex.terminal:after{bottom:5px}.ex.left{left:56px;top:68px}.ex.right{right:56px;top:68px}.fuse{left:170px;top:68px;width:52px;height:46px;background:linear-gradient(#b98b4c,#735532)}.diode{left:250px;top:70px;width:34px;height:46px;background:linear-gradient(#1e293b,#050a12);border-left:6px solid #d6dbe0}.chip{left:330px;top:52px;width:98px;height:72px;background:linear-gradient(135deg,#30343b,#080b10);border-radius:5px}.chip:before,.chip:after{content:"";position:absolute;top:12px;bottom:12px;width:7px;background:repeating-linear-gradient(to bottom,#c4c9c5 0 6px,transparent 6px 11px)}.chip:before{left:-7px}.chip:after{right:-7px}.cap{left:365px;top:136px;width:38px;height:38px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#2b91dc 35%,#173e79 72%);border:4px solid #c8e2f5}.led{width:34px;height:34px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#ffb9a6,#e22d20 55%,#8a0d0b);color:#fff}.led:after{content:"";position:absolute;width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.8);left:7px;top:6px}.l1{right:204px;top:35px}.l2{right:204px;top:78px}.l3{right:204px;top:121px}.resistor{right:112px;width:78px;height:18px;background:linear-gradient(90deg,#d5c394,#f6edc8,#d5c394);border-radius:999px;color:#263142}.resistor:before,.resistor:after{content:"";position:absolute;top:0;bottom:0;width:4px;background:#7a5023}.resistor:before{left:22px}.resistor:after{right:22px}.r1{top:44px}.r2{top:87px}.r3{top:130px}@keyframes sampleFloat{0%,100%{transform:rotateX(58deg) rotateZ(-4deg) translateY(0)}50%{transform:rotateX(55deg) rotateZ(3deg) translateY(-10px)}}
.workspace{display:grid;grid-template-columns:minmax(420px,.9fr) minmax(520px,1.1fr);gap:24px;align-items:start;margin-bottom:28px}.planner-form,.parts-panel,.interactive-section,.result-section{background:rgba(255,255,255,.92);border:1px solid rgba(217,229,238,.92);box-shadow:var(--small-shadow);padding:28px}.form-head,.panel-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:22px}.panel-head h2,.form-head h2{margin:0;color:var(--ink);font-size:23px;letter-spacing:-.03em}.panel-head.compact>div{display:flex;align-items:center;gap:12px}.step{width:30px;height:30px;border-radius:10px;background:#e7fbf4;color:var(--green);display:inline-flex;align-items:center;justify-content:center;font-weight:950}.field{display:flex;flex-direction:column;gap:9px}.field span,.field>label{font-size:12px;text-transform:uppercase;letter-spacing:.14em;font-weight:950;color:#2b3b51}.field.full{margin-bottom:20px}textarea,input,select{width:100%;border:0;border-bottom:2px solid #cad8e4;border-radius:0;background:rgba(255,255,255,.72);padding:14px 6px;color:#19283b;outline:none}textarea{min-height:150px;resize:vertical;border:1px solid #d7e3ee;border-bottom:2px solid #cad8e4;border-radius:8px;padding:15px}textarea:focus,input:focus,select:focus{border-color:var(--green);box-shadow:0 8px 22px rgba(8,184,132,.10)}small,.hint{color:#6f8094}.compact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.advanced{margin:22px 0;border:1px solid var(--line);padding:18px;background:rgba(248,252,255,.72)}.advanced summary{cursor:pointer;font-weight:900;color:var(--ink)}.advanced .compact-grid{margin-top:18px}.primary,.secondary{border:0;cursor:pointer;font-weight:950}.primary{width:100%;padding:18px 22px;color:#fff;background:linear-gradient(120deg,var(--green),var(--cyan));box-shadow:0 18px 36px rgba(19,169,223,.24)}.secondary{padding:12px 16px;background:#fff;border:1px solid var(--line);color:#213044;border-radius:8px}.secondary:disabled{opacity:.45;cursor:not-allowed}.bom-wrap{overflow:auto}.bom{width:100%;border-collapse:collapse;font-size:14px}.bom th{font-size:11px;letter-spacing:.12em;text-transform:uppercase;text-align:left;color:#42607d;padding:12px 10px;border-bottom:1px solid var(--line)}.bom td{padding:13px 10px;border-bottom:1px solid var(--line);color:#34475d}.bom tr{transition:.18s}.bom tr:hover,.bom tr.row-highlight{background:#eefbf7}.color-tag{display:inline-flex;min-width:44px;justify-content:center;color:#fff;font-weight:950;border-radius:5px;padding:5px 8px;font-size:12px;box-shadow:0 6px 12px rgba(0,0,0,.12)}
.interactive-section{margin:26px 0 28px;padding:30px}.live-state{display:inline-flex;align-items:center;gap:7px;margin-top:7px;color:var(--green);font-size:12px;font-weight:900}.live-state i{width:12px;height:12px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(8,184,132,.12)}.view-switch{display:flex;gap:9px}.view-switch button{border:1px solid var(--line);background:#fff;border-radius:8px;min-width:44px;height:40px;font-weight:950;cursor:pointer;color:var(--ink)}.view-switch button.active{border-color:var(--green);box-shadow:0 0 0 4px rgba(8,184,132,.10)}.board-stage{position:relative;min-height:540px;background:#162331;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px),radial-gradient(circle at 50% 28%,rgba(67,97,121,.34),transparent 42%);background-size:40px 40px,40px 40px,100% 100%;overflow:hidden;display:flex;align-items:center;justify-content:center;border-radius:10px;perspective:1200px}.interactive-section .board-stage{min-height:640px}.stage-help{margin:0;padding:13px 16px;background:#152333;color:#d7e7f4;text-align:center;font-size:12px;font-weight:750;border-radius:0 0 10px 10px}.pcb-board{position:relative;width:86%;height:360px;border-radius:12px;background:linear-gradient(145deg,#0b844f,#0b6c45 55%,#064735);box-shadow:0 42px 60px rgba(0,0,0,.36),inset 0 0 0 2px rgba(255,255,255,.25),inset 0 -24px 42px rgba(0,0,0,.28);transform-origin:center center;transform-style:preserve-3d;transition:transform .25s ease}.live-3d .pcb-board,.board-stage[data-mode="3d"] .pcb-board{transform:rotateX(58deg) rotateZ(-1.5deg) scale(var(--zoom,1));animation:board3d 10s ease-in-out infinite}.pcb-board:before{content:"";position:absolute;inset:12px;border:1px solid rgba(242,213,105,.32);border-radius:8px;z-index:1}.pcb-board:after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle,rgba(255,203,68,.45) 1.5px,transparent 1.9px);background-size:21px 21px;opacity:.50;z-index:0}.mount-hole{position:absolute;width:22px;height:22px;border-radius:50%;background:#1a2a3b;border:6px solid #ead889;z-index:4;box-shadow:0 6px 0 rgba(0,0,0,.23);transform:translateZ(18px)}.mount-hole.tl{left:26px;top:26px}.mount-hole.tr{right:26px;top:26px}.mount-hole.bl{left:26px;bottom:26px}.mount-hole.br{right:26px;bottom:26px}.copper-trace{position:absolute;height:6px;border-radius:999px;background:rgba(190,170,65,.62);z-index:2;transform-origin:left center;box-shadow:0 0 0 1px rgba(110,99,35,.25)}
.pcb-part{position:absolute;z-index:8;cursor:grab;transform:translateZ(52px);transform-style:preserve-3d;display:flex;align-items:center;justify-content:center;user-select:none;touch-action:none}.pcb-part.dragging{cursor:grabbing;filter:drop-shadow(0 0 14px rgba(8,184,132,.65));z-index:20}.tag{position:absolute;left:50%;top:-26px;transform:translateX(-50%) translateZ(70px);color:#fff;font-size:11px;font-weight:950;border-radius:5px;padding:4px 7px;white-space:nowrap;box-shadow:0 5px 10px rgba(0,0,0,.25)}.component-body{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;font-size:12px;font-weight:950;text-shadow:0 1px 2px rgba(0,0,0,.45);border-radius:6px}.pin{position:absolute;width:7px;height:7px;border-radius:50%;background:#e6ca69;border:1px solid #805f1d;z-index:-1}.p1{left:-5px;top:50%}.p2{right:-5px;top:50%}.type-terminal,.type-connector{background:linear-gradient(#3aa0f2,#0a559f);border:5px solid #123f70;border-radius:8px;box-shadow:0 14px 18px rgba(0,0,0,.32)}.type-terminal .component-body:before,.type-terminal .component-body:after,.type-connector .component-body:before,.type-connector .component-body:after{content:"";position:absolute;left:50%;transform:translateX(-50%);width:26%;aspect-ratio:1;border-radius:50%;background:#061322;border:4px solid #98d5ff}.type-terminal .component-body:before,.type-connector .component-body:before{top:12%}.type-terminal .component-body:after,.type-connector .component-body:after{bottom:12%}.type-fuse{background:linear-gradient(#b99555,#6f502e);border:2px solid #d8af64;border-radius:6px;box-shadow:0 13px 16px rgba(0,0,0,.32)}.type-diode{background:linear-gradient(#202938,#050812);border-left:7px solid #dbe1e7;border-radius:6px;box-shadow:0 12px 16px rgba(0,0,0,.35)}.type-regulator,.type-ic,.type-mcu{background:linear-gradient(145deg,#323740,#090c12);border-radius:6px;box-shadow:0 18px 24px rgba(0,0,0,.40)}.type-regulator:before,.type-regulator:after,.type-ic:before,.type-ic:after,.type-mcu:before,.type-mcu:after{content:"";position:absolute;top:16%;bottom:16%;width:8px;background:repeating-linear-gradient(to bottom,#d5d9d5 0 7px,transparent 7px 13px)}.type-regulator:before,.type-ic:before,.type-mcu:before{left:-8px}.type-regulator:after,.type-ic:after,.type-mcu:after{right:-8px}.type-capacitor{border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#3697df 33%,#173f84 72%);border:5px solid #c8e2f5;box-shadow:0 15px 20px rgba(0,0,0,.34)}.type-led{border-radius:50%;background:radial-gradient(circle at 36% 28%,#ffc6af,#e73020 55%,#8f0e0d);box-shadow:0 0 18px rgba(255,79,52,.25),0 14px 18px rgba(0,0,0,.31)}.type-led:after{content:"";position:absolute;width:28%;aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.78);left:23%;top:18%}.type-resistor{background:linear-gradient(90deg,#d8c99a,#fff3c7,#d8c99a);border-radius:999px;color:#213044;box-shadow:0 10px 14px rgba(0,0,0,.27)}.type-resistor .component-body{color:#29394b;text-shadow:none}.type-resistor:before,.type-resistor:after{content:"";position:absolute;top:0;bottom:0;width:5px;background:#74501d}.type-resistor:before{left:28%}.type-resistor:after{right:28%}.type-usb{background:linear-gradient(#caa56f,#7d5c37);border:3px solid #e4bc7d;border-radius:5px;box-shadow:0 12px 16px rgba(0,0,0,.32)}.type-button{background:linear-gradient(#58677a,#2f3f52);border-radius:50%;box-shadow:0 12px 18px rgba(0,0,0,.32)}@keyframes board3d{0%,100%{transform:rotateX(58deg) rotateZ(-1.5deg) scale(var(--zoom,1))}50%{transform:rotateX(55deg) rotateZ(1.4deg) scale(var(--zoom,1))}}
.result-section{margin-top:28px}.result-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.status{margin:8px 0 0;color:#627389;font-weight:800}.result-empty{min-height:260px;border-top:4px solid var(--ink);padding-top:28px}.empty-line{height:14px;width:58%;background:#edf4f8;margin:12px 0}.empty-line.short{width:34%}.empty-board{height:150px;background:#edf4f8;margin-top:28px}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.result-block{border-top:4px solid var(--ink);padding-top:18px}.result-block h3{margin:0 0 14px;font-size:24px;color:var(--ink)}.result-block p,.result-block li{line-height:1.65;color:#34475d}.result-wide{grid-column:1/-1}.result-board-copy .board-stage{min-height:420px}.result-board-copy .pcb-board{animation:none;transform:scale(.95)}
@media(max-width:1050px){.hero-shell,.workspace{grid-template-columns:1fr}.main-nav{display:none}.brand-logo img{width:220px}.compact-grid{grid-template-columns:1fr 1fr}.interactive-section .board-stage{min-height:520px}.pcb-board{width:92%;height:300px}}
@media(max-width:650px){main{width:calc(100% - 24px);padding-top:34px}.site-header{height:auto;min-height:78px;gap:12px;flex-wrap:wrap;padding:12px}.header-actions{margin-left:auto}.hero-shell{gap:24px}.hero-example{min-height:300px;padding:18px}.example-board-wrap{height:220px}.example-board{width:100%;height:145px}h1{font-size:42px}.workspace,.result-grid{grid-template-columns:1fr}.compact-grid{grid-template-columns:1fr}.planner-form,.parts-panel,.interactive-section,.result-section{padding:20px}.board-stage{min-height:390px}.interactive-section .board-stage{min-height:430px}.pcb-board{height:230px;width:96%}.bom{font-size:12px}}