:root{--ink:#14283f;--muted:#64758a;--blue:#2463eb;--navy:#10243b;--mint:#c8f5e4;--bg:#f3f6fa;--line:#dfe6ef;--green:#12734f;--red:#b42e41;--radius:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Segoe UI,Arial,sans-serif;font-size:15px;line-height:1.55}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.55;cursor:wait}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #6a9bff;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:34px;line-height:1.2;letter-spacing:-1px}h2{font-size:21px;letter-spacing:-.4px}h3{font-size:16px}p{color:var(--muted)}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--blue);margin-bottom:12px}.muted{color:var(--muted)}.mono{font-family:Consolas,monospace}.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:800;letter-spacing:-.6px}.brand-mark{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;background:var(--mint);color:var(--navy);font-family:Consolas,monospace;font-size:21px}.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:11px 18px;border-radius:9px;font-weight:650;display:inline-flex;align-items:center;justify-content:center;gap:9px}.btn:hover{background:#edf2f9}.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn.primary:hover{background:#174fcd}.btn.light{background:var(--mint);border-color:var(--mint);color:var(--navy)}.btn.small{padding:8px 12px;font-size:13px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px}.badge{display:inline-flex;padding:4px 10px;border-radius:6px;font-size:11px;font-weight:750;background:#eaf1ff;color:#315fbd}.badge.Mudah{color:#147653;background:#e4f7ef}.badge.Bertahap{color:#9a6407;background:#fff1d5}.badge.Menengah{color:#7951ad;background:#f0e9fc}.loading{padding:60px;text-align:center}.error{color:var(--red);font-size:14px}.hidden{display:none!important}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:12px 22px;border-radius:10px;background:var(--navy);color:#fff;z-index:20;box-shadow:0 10px 25px #10243b30;display:none;max-width:90vw}#toast.show{display:block}
.installer-wrap{max-width:760px;margin:40px auto;padding:0 20px}.installer-wrap>.brand{margin-bottom:25px}.installer-card{padding:32px}.installer-form label{display:block;font-size:13px;font-weight:650;margin:14px 0}.installer-form input{display:block;width:100%;margin-top:7px;border:1px solid #ccd6e4;background:#fff;border-radius:8px;padding:11px 12px}.installer-form h2{margin-top:25px}.installer-form p{font-size:12px}.installer-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.installer-footer{text-align:center;font-size:12px;margin-top:20px}@media(max-width:520px){.installer-grid{grid-template-columns:1fr}.installer-card{padding:22px}}
/* Masuk */
.login-wrap{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}.login-story{background:var(--navy);color:white;padding:48px 8%;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.login-story:after{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(#ffffff12 1px,transparent 1px);background-size:24px 24px}.login-story>*{z-index:1;position:relative}.login-story .eyebrow{color:var(--mint)}.login-story h1{font-size:49px;max-width:470px;margin-bottom:20px}.login-story p{color:#aebfd2;max-width:430px}.login-story .brand{margin-bottom:65px}.story-circuit{margin:24px 0;background:#ffffff08;border:1px solid #ffffff18;border-radius:20px;padding:18px;max-width:480px}.story-circuit svg{width:100%;height:auto;color:var(--mint)}.story-foot{display:flex;gap:35px;margin-top:30px;color:#b9c9d9;font-size:12px}.story-foot strong{display:block;font-size:23px;color:white}.login-panel{padding:60px 12%;display:flex;align-items:center;justify-content:center}.login-form{width:100%;max-width:400px}.login-form h2{font-size:30px}.login-form label{display:block;font-weight:650;margin:20px 0 8px;font-size:13px}.login-form input{width:100%;padding:13px 14px;border:1px solid #ccd6e4;border-radius:9px;background:white}.password-field{display:flex;gap:7px}.password-field input{min-width:0}.password-field button{padding:8px;font-size:12px}.login-form .primary{width:100%;margin-top:23px}.login-note{margin-top:26px;padding:16px;border:1px solid var(--line);border-radius:10px;font-size:13px}.login-note p{margin:0}.login-error{min-height:22px;margin-top:12px}
/* Kerangka */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:245px;background:var(--navy);color:#b9c9d9;padding:27px 19px;display:flex;flex-direction:column;overflow-y:auto}.sidebar .brand{color:white;margin:0 10px 30px}.nav-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:8px;font-size:13px;margin:3px 0}.nav-item:hover{background:#ffffff0b;color:white}.nav-item.active{background:#254465;color:#fff}.nav-item .number{font-family:Consolas,monospace;font-size:12px;width:25px;color:#91acc6}.nav-item.active .number{color:var(--mint)}.nav-section{font-size:10px;text-transform:uppercase;letter-spacing:1.8px;color:#7492ac;margin:26px 12px 10px}.nav-dot{margin-left:auto;font-size:11px;color:var(--mint)}.sidebar-foot{margin-top:auto;padding:25px 12px 0;font-size:11px;color:#8fa6bc}.workspace{margin-left:245px}.topbar{height:80px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 38px;gap:20px}.breadcrumb{font-size:13px;color:var(--muted)}.userbar{display:flex;align-items:center;gap:12px}.avatar{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:#eaf1ff;color:var(--blue);font-weight:800;font-size:12px}.user-name{max-width:240px;font-size:12px;font-weight:650}.user-name small{display:block;color:var(--muted);font-weight:400}.content{max-width:1250px;margin:auto;padding:34px 38px 50px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}.page-heading h1{margin-bottom:9px}.page-heading p{margin:0}.hero{background:var(--navy);color:#fff;border-radius:20px;padding:30px 35px;display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:25px;overflow:hidden}.hero .eyebrow{color:var(--mint)}.hero h2{font-size:28px;max-width:510px}.hero p{color:#adc1d5;max-width:560px;margin-bottom:22px}.hero-art{font-family:Consolas,monospace;font-size:66px;font-weight:bold;letter-spacing:-7px;color:var(--mint);padding:20px;white-space:nowrap}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:30px}.stat{padding:20px 23px}.stat-label{color:var(--muted);font-size:12px}.stat-value{font-size:28px;font-weight:750;margin-top:5px}.stat-value small{font-size:14px;color:var(--muted);font-weight:400}.section-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.section-title h2{margin:0}.section-title span{font-size:12px;color:var(--muted)}.question-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.question-card{padding:21px;display:block;transition:transform .15s,border-color .15s}.question-card:hover{transform:translateY(-3px);border-color:#a6bdea}.question-card .card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.question-no{font-size:11px;font-weight:800;color:var(--muted);letter-spacing:1px}.question-card h3{margin:0 0 9px;font-size:17px}.question-card p{font-size:12px;margin-bottom:17px}.card-bottom{border-top:1px solid var(--line);padding-top:13px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.score-good{color:var(--green);font-weight:700}.arrow{color:var(--blue)}
/* Latihan */
.question-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}.question-header .eyebrow{margin:0}.step{display:inline-grid;place-items:center;width:25px;height:25px;background:#eaf1ff;color:var(--blue);border-radius:7px;font-size:12px;font-weight:800;margin-right:9px}.question-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:20px;align-items:start}.exercise-main{min-width:0}.diagram-card{margin-bottom:20px}.card-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px}.card-heading h2{margin:0;font-size:17px}.card-heading span:not(.step){font-size:11px;color:var(--muted)}.diagram-scroll{overflow-x:auto;background:#f8fafc;border:1px solid #e7edf5;border-radius:11px;padding:15px}.circuit{display:block;width:100%;min-width:450px;color:var(--ink)}.wire{fill:none;stroke:#879bb2;stroke-width:1.8}.gate-shape{fill:#fff;stroke:currentColor;stroke-width:2;stroke-linejoin:round}.gate-missing{color:var(--blue)}.diagram-caption{font-size:12px;margin:12px 0 0}.formula-list{background:#f7f9fc;padding:15px;border-radius:9px;font-size:12px;line-height:1.9}.formula-list .final{border-top:1px solid var(--line);margin-top:7px;padding-top:7px;font-weight:750}.aside-card{padding:20px;margin-bottom:16px}.aside-card h3{margin-bottom:10px}.aside-card p,.aside-card li{font-size:12px;color:var(--muted)}.aside-card ol{padding-left:18px;margin-bottom:0}.aside-card li{margin:8px 0}.aside-card.tip{background:#eaf4ff;border-color:#d6e8fc}.symbol-card{margin-bottom:20px}.symbol-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:8px}.symbol-option{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 3px;color:var(--ink);min-width:0}.symbol-option svg{display:block;width:100%;height:45px}.symbol-option strong{font-size:10px}.symbol-option:hover{border-color:#99b4e7;background:#f7faff}.symbol-option.selected{border:2px solid var(--blue);padding:7px 2px;background:#edf3ff;color:var(--blue)}.symbol-option.correct{border-color:var(--green);background:#eaf8f1}.symbol-option.incorrect{border-color:var(--red);background:#fff0f2}.selection-status{font-size:12px;margin:13px 0 0;color:var(--muted)}.table-card{padding:0;overflow:hidden}.table-card .card-heading{padding:22px 25px 0}.table-note{padding:0 25px;font-size:12px}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13px}th{text-align:center;font-size:11px;color:var(--muted);background:#f6f8fc;padding:12px 8px;font-weight:750;white-space:nowrap}td{border-top:1px solid #edf1f6;padding:9px 8px;text-align:center}.truth-table th.output{color:var(--blue);background:#edf3ff}.truth-table td.fixed{font-family:Consolas,monospace;color:#60758e}.truth-table td.row-index{color:#a1aec0;font-size:10px}.bit-input{padding:7px 10px;border:1px solid #cdd8e6;border-radius:7px;background:#fff;color:var(--ink);min-width:55px;max-width:74px;font-family:Consolas,monospace}.bit-input.correct{border-color:#6cc7a1;background:#edf9f3;color:var(--green)}.bit-input.incorrect{border-color:#e7a0ac;background:#fff2f4;color:var(--red)}.table-footer{padding:15px 25px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.actions{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:20px}.action-buttons{display:flex;gap:10px}.save-status{font-size:12px;color:var(--muted)}.feedback{padding:17px 20px;border-radius:11px;margin-top:18px;background:#eaf3ff;color:#264f94;font-size:13px}.feedback strong{font-size:19px;display:block;margin-bottom:5px}.question-nav{display:flex;justify-content:space-between;margin-top:25px;gap:15px}.question-nav a{font-size:13px;color:var(--muted)}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.gate-guide{display:flex;align-items:center;gap:20px}.gate-guide svg{width:100px;flex-shrink:0;color:var(--blue)}.gate-guide h3{margin:0 0 5px}.gate-guide p{font-size:13px;margin:0}.teacher-table td{text-align:left;padding:13px 14px}.teacher-table th{text-align:left;padding:13px 14px}.teacher-table td.numeric{text-align:center;font-family:Consolas,monospace}.teacher-table td.name{min-width:250px;font-weight:600}.teacher-summary{font-size:12px;color:var(--muted);margin-top:16px}.error-page{padding:30px;background:#fff;border-radius:15px}
@media(min-width:1500px){.content{padding-top:45px}.login-story h1{font-size:60px}}
@media(max-width:1100px){.sidebar{width:205px;padding:23px 13px}.workspace{margin-left:205px}.topbar{padding:0 24px}.content{padding:28px 24px}.question-layout{grid-template-columns:1fr}.exercise-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.exercise-aside .tip{display:none}.login-story h1{font-size:40px}.symbol-option svg{height:50px}}
@media(max-width:760px){h1{font-size:27px}.login-wrap{grid-template-columns:1fr}.login-story{padding:25px 24px}.login-story .brand{margin-bottom:30px}.login-story h1{font-size:33px}.login-story .story-circuit,.story-foot{display:none}.login-story p{margin-bottom:0}.login-panel{padding:32px 24px}.sidebar{position:relative;width:100%;padding:18px;display:block}.sidebar .brand{margin:0}.sidebar .nav-section,.sidebar .question-links,.sidebar-foot{display:none}.sidebar .main-links{display:flex;margin-top:15px;gap:7px}.nav-item{padding:8px 11px;font-size:12px}.workspace{margin-left:0}.topbar{padding:12px 18px;height:auto;min-height:68px}.breadcrumb{display:none}.userbar{width:100%}.userbar .btn{margin-left:auto}.user-name{max-width:210px}.content{padding:25px 17px}.hero{padding:25px}.hero h2{font-size:24px}.hero-art{display:none}.stats{gap:9px}.stat{padding:14px 12px}.stat-label{font-size:10px}.stat-value{font-size:23px}.question-grid,.guide-grid{grid-template-columns:1fr}.page-heading{align-items:flex-start;flex-direction:column}.card{padding:19px}.symbol-grid{grid-template-columns:repeat(4,1fr)}.symbol-option svg{height:40px}.exercise-aside{grid-template-columns:1fr}.aside-card{margin-bottom:0}.card-heading{align-items:flex-start}.card-heading>span{display:none}.table-card{padding:0}.table-card .card-heading{padding:18px 18px 0}.table-note{padding:0 18px}.table-footer{padding:14px 18px}.actions{align-items:flex-start;flex-direction:column}.action-buttons{width:100%}.action-buttons .btn{flex:1;padding:11px}.gate-guide{gap:15px}.gate-guide svg{width:78px}}