:root{--course-accent:#47b8c8;--course-accent-2:#2f718d;--course-ink:#0b1928;--course-panel:#132b40;--course-paper:#f4f7f8;--course-line:#dce5e9;--course-muted:#687b8b;--course-good:#15805e;--course-warn:#b96a16;--course-bad:#c24545}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:#31485a;background:var(--course-paper);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}.course-shell{min-height:100vh}.course-topbar{height:68px;position:sticky;z-index:1000;top:0;display:flex;align-items:center;gap:1rem;padding:0 clamp(1rem,3vw,2rem);color:#fff;background:rgba(8,22,35,.97);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 8px 28px rgba(5,17,28,.15);backdrop-filter:blur(16px)}.course-brand{display:flex;align-items:center;gap:.65rem;color:#fff;text-decoration:none}.course-brand img{width:42px;height:42px}.course-brand div{display:grid;gap:.1rem}.course-brand strong{font-family:"Barlow Condensed",Inter,sans-serif;font-size:1.08rem;text-transform:uppercase;letter-spacing:.035em}.course-brand small{color:#90a6b8;font-size:.53rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.course-top-title{min-width:0;margin-left:auto;color:#b6c5d1;font-size:.74rem;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-home{height:38px;display:inline-flex;align-items:center;gap:.4rem;padding:0 .75rem;border:1px solid rgba(255,255,255,.12);border-radius:9px;color:#c9d5de;background:rgba(255,255,255,.05);font-size:.7rem;font-weight:700;text-decoration:none}.course-layout{display:grid;grid-template-columns:290px minmax(0,1fr);min-height:calc(100vh - 68px)}.course-sidebar{position:sticky;top:68px;height:calc(100vh - 68px);overflow:auto;padding:1.15rem;background:#0d2133;border-right:1px solid #17354d}.course-sidebar::-webkit-scrollbar{width:7px}.course-sidebar::-webkit-scrollbar-thumb{background:#29455b;border-radius:9px}.course-progress-card{padding:1rem;border:1px solid rgba(255,255,255,.08);border-radius:13px;background:rgba(255,255,255,.045)}.course-progress-card span{color:#8da4b6;font-size:.62rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.progress-track{height:7px;margin:.7rem 0 .45rem;overflow:hidden;border-radius:8px;background:#20394d}.progress-fill{width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--course-accent-2),var(--course-accent));transition:width .3s}.progress-text{color:#d5e0e8;font-size:.68rem;font-weight:700}.module-nav{display:grid;gap:.36rem;margin-top:1rem}.module-nav button{width:100%;display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:.55rem;padding:.68rem .62rem;border:1px solid transparent;border-radius:10px;color:#91a6b7;background:transparent;font:600 .68rem/1.3 Inter,sans-serif;text-align:left;cursor:pointer}.module-nav button:hover{color:#fff;background:rgba(255,255,255,.05)}.module-nav button.active{color:#fff;border-color:rgba(90,190,205,.25);background:rgba(71,184,200,.11)}.module-nav button.done .module-number{color:#081b26;background:var(--course-accent)}.module-number{width:27px;height:27px;display:grid;place-items:center;border-radius:8px;color:#a8b8c4;background:#1d374b;font-size:.62rem;font-weight:800}.module-status{font-size:.65rem;color:#5d7689}.course-main{min-width:0}.course-hero{position:relative;overflow:hidden;padding:4.5rem clamp(1.2rem,5vw,5rem) 3.8rem;color:#fff;background:radial-gradient(circle at 84% 15%,color-mix(in srgb,var(--course-accent) 20%,transparent),transparent 30%),linear-gradient(135deg,#081827,#12344d)}.course-hero::before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(255,255,255,.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.1) 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(to bottom,black,transparent)}.course-hero>*{position:relative}.hero-kicker{display:inline-flex;align-items:center;gap:.45rem;color:var(--course-accent);font-size:.63rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.course-hero h1{max-width:930px;margin:1rem 0 .8rem;font-family:"Barlow Condensed",Inter,sans-serif;font-size:clamp(3rem,6vw,5.5rem);line-height:.88;letter-spacing:-.025em;text-transform:uppercase}.course-hero p{max-width:780px;margin:0;color:#a9bdcc;font-size:.9rem;line-height:1.75}.hero-stats{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.5rem}.hero-stats span{padding:.5rem .7rem;border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#c3d1db;background:rgba(255,255,255,.05);font-size:.66rem;font-weight:700}.course-content{width:min(980px,calc(100% - 3rem));margin:0 auto;padding:3.2rem 0 7rem}.module-view{display:none}.module-view.active{display:block;animation:moduleIn .3s ease}@keyframes moduleIn{from{opacity:0;transform:translateY(8px)}}.module-eyebrow{color:var(--course-accent-2);font-size:.65rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.module-view>h2{margin:.55rem 0 .8rem;color:#173044;font-family:"Barlow Condensed",Inter,sans-serif;font-size:clamp(2.25rem,4vw,3.4rem);line-height:.96;text-transform:uppercase}.module-objective{margin:0 0 2rem;padding:1rem 1.15rem;border-left:4px solid var(--course-accent);border-radius:0 10px 10px 0;color:#5b7081;background:#eef4f5;font-size:.82rem;line-height:1.65}.lesson-section{margin:0 0 1rem;padding:1.45rem;border:1px solid var(--course-line);border-radius:15px;background:#fff;box-shadow:0 5px 20px rgba(15,37,53,.035)}.lesson-section h3{display:flex;align-items:center;gap:.55rem;margin:0 0 .85rem;color:#234155;font-size:1.03rem}.lesson-section h3 i{color:var(--course-accent-2)}.lesson-section p{margin:.7rem 0;color:#536979;font-size:.83rem;line-height:1.78}.lesson-section ul,.lesson-section ol{margin:.75rem 0;padding-left:1.25rem;color:#536979;font-size:.81rem;line-height:1.75}.lesson-section li+li{margin-top:.32rem}.formula-box{margin:1rem 0;padding:1rem;border:1px solid #cfe1e5;border-radius:11px;color:#264b5b;background:#edf7f8;font:700 .86rem/1.65 "Roboto Mono",Consolas,monospace}.technical-note,.warning-note,.field-note{margin:1rem 0;padding:1rem 1.1rem;border-radius:11px;font-size:.78rem;line-height:1.65}.technical-note{color:#315a68;background:#eaf5f7;border-left:4px solid #64aebb}.warning-note{color:#80501e;background:#fff4e5;border-left:4px solid #df912f}.field-note{color:#3d5e51;background:#ebf6f1;border-left:4px solid #3f9c75}.case-study{margin:1.35rem 0;padding:1.35rem;border-radius:15px;color:#dce7ee;background:linear-gradient(135deg,#10283c,#173d56)}.case-study span{color:var(--course-accent);font-size:.61rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.case-study h3{margin:.55rem 0;color:#fff;font-size:1.05rem}.case-study p{color:#b8c9d5;font-size:.8rem;line-height:1.7}.practice-box{margin:1.35rem 0;padding:1.35rem;border:1px solid #d6e2e6;border-radius:15px;background:#f9fbfb}.practice-box h3{margin:0 0 .5rem;color:#29495c}.practice-box p{color:#647786;font-size:.79rem;line-height:1.6}.practice-options{display:grid;gap:.5rem;margin-top:1rem}.practice-options button{padding:.78rem .9rem;border:1px solid #d9e3e7;border-radius:9px;color:#486071;background:#fff;font:600 .76rem Inter,sans-serif;text-align:left;cursor:pointer}.practice-options button:hover{border-color:#80b7c0;background:#f0f8f9}.practice-options button.correct{color:#176347;border-color:#6fc29f;background:#e9f7f1}.practice-options button.wrong{color:#923d3d;border-color:#dc9696;background:#fff0f0}.practice-feedback{min-height:1.2rem;margin-top:.75rem;color:#526978;font-size:.75rem;font-weight:600}.module-actions{display:flex;justify-content:space-between;gap:.75rem;margin-top:2rem}.course-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:0 1rem;border:0;border-radius:9px;color:#fff;background:#355f78;font:700 .75rem Inter,sans-serif;cursor:pointer}.course-btn:hover{background:#294f66}.course-btn.primary{color:#08202a;background:var(--course-accent)}.course-btn:disabled{opacity:.4;cursor:not-allowed}.quiz-panel{padding:1.5rem;border:1px solid var(--course-line);border-radius:16px;background:#fff}.quiz-progress{color:#778996;font-size:.68rem;font-weight:800;text-transform:uppercase}.quiz-question{margin:.75rem 0 1rem;color:#263f52;font-size:1.06rem;line-height:1.45}.quiz-options{display:grid;gap:.55rem}.quiz-options button{padding:.9rem 1rem;border:1px solid #d9e3e7;border-radius:10px;color:#405a6c;background:#fafcfc;font:600 .78rem/1.45 Inter,sans-serif;text-align:left;cursor:pointer}.quiz-options button:hover{border-color:#74aebb;background:#eff7f8}.quiz-result{text-align:center;padding:2.2rem}.quiz-result i{font-size:2.6rem;color:var(--course-accent-2)}.quiz-result h3{font-size:1.4rem;color:#27465a}.certificate-card{padding:2rem;border:1px solid #d7e3e7;border-radius:17px;background:#fff;text-align:center}.certificate-card.locked{color:#718391;background:#f0f3f4}.certificate-card i{font-size:2.5rem;color:var(--course-accent-2)}.certificate-form{max-width:480px;display:grid;gap:.75rem;margin:1.2rem auto 0;text-align:left}.certificate-form label{color:#5f7382;font-size:.7rem;font-weight:700}.certificate-form input{width:100%;height:46px;padding:0 .85rem;border:1px solid #d6e1e5;border-radius:9px;font:500 .82rem Inter,sans-serif}.certificate-form select{width:100%;height:46px;padding:0 .85rem;border:1px solid #d6e1e5;border-radius:9px;color:#31485a;background:#fff;font:500 .78rem Inter,sans-serif}.certificate-recovery{max-width:560px;margin:1.35rem auto 0;padding:1rem 1.1rem;border:1px solid #dce7ea;border-radius:12px;background:#f8fbfb;text-align:left}.certificate-recovery summary{color:#36596a;font-size:.72rem;font-weight:800;cursor:pointer}.certificate-recovery .recovery-form{margin-top:.9rem}.certificate-recovery .recovery-form p{margin:0;color:#70838f;font-size:.7rem;line-height:1.55}.certificate-recovery-status a{color:#245f76;font-weight:800}.mobile-course-toggle{display:none}.course-toast{position:fixed;right:1rem;bottom:1rem;z-index:2000;padding:.8rem 1rem;border-radius:10px;color:#fff;background:#18384e;box-shadow:0 12px 30px rgba(0,0,0,.2);font-size:.74rem;font-weight:700}
@media(max-width:900px){.course-top-title{display:none}.course-layout{grid-template-columns:1fr}.course-sidebar{height:auto;display:none;position:fixed;z-index:900;inset:68px 0 0;padding-bottom:5rem}.course-sidebar.open{display:block}.mobile-course-toggle{width:40px;height:40px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.12);border-radius:9px;color:#fff;background:rgba(255,255,255,.05)}.course-content{width:min(100% - 2rem,880px)}.course-hero{padding:3.5rem 1rem 3rem}.course-home span{display:none}.course-home{width:38px;padding:0;justify-content:center}}
@media(max-width:520px){.course-brand div{display:none}.course-topbar{gap:.5rem}.course-hero h1{font-size:3.1rem}.course-content{padding-top:2.2rem}.lesson-section,.practice-box,.case-study{padding:1.05rem}.module-actions{position:sticky;bottom:0;padding:.7rem 0;background:linear-gradient(transparent,var(--course-paper) 24%)}.course-btn{flex:1;padding:0 .65rem;font-size:.68rem}}
@media print{.course-topbar,.course-sidebar,.course-hero,.module-actions,.certificate-form,.mobile-course-toggle{display:none!important}.course-layout{display:block}.course-content{width:100%;padding:0}.module-view{display:none!important}.module-view.certificate-module{display:block!important}.certificate-card{min-height:680px;display:grid;place-items:center;border:10px double #315b70}.certificate-card.locked{display:none!important}}
.course-account{display:flex;align-items:center;gap:.4rem;min-width:0}.course-account img{width:28px;height:28px;border-radius:50%;object-fit:cover}.course-account span{max-width:115px;color:#c9d5de;font-size:.63rem;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.course-account button{width:32px;height:32px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.1);border-radius:8px;color:#c9d5de;background:rgba(255,255,255,.04);cursor:pointer}.course-account button:hover{color:#fff;background:rgba(255,255,255,.09)}
.login-overlay.course-login-overlay{position:fixed;z-index:5000;inset:0;display:flex;align-items:center;justify-content:center;padding:1rem;background:radial-gradient(circle at 75% 20%,rgba(71,184,200,.18),transparent 34%),linear-gradient(145deg,#061421,#0d293d)}.course-login-card{width:min(430px,100%);padding:2.3rem;border:1px solid rgba(255,255,255,.09);border-radius:20px;color:#fff;background:#10283c;box-shadow:0 28px 80px rgba(0,0,0,.4);text-align:center}.course-login-card>img{width:74px;height:74px;filter:drop-shadow(0 8px 18px rgba(0,0,0,.25))}.course-login-card .login-kicker{display:block;margin:.85rem 0 .45rem;color:var(--course-accent);font-size:.62rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.course-login-card h2{margin:.3rem 0 .65rem;font-family:"Barlow Condensed",Inter,sans-serif;font-size:2.35rem;text-transform:uppercase}.course-login-card>p{margin:.5rem 0 1.35rem;color:#a9bdcc;font-size:.78rem;line-height:1.65}.course-login-card #google-login-btn{width:100%;min-height:50px;border:0;border-radius:10px;color:#08202a;background:var(--course-accent);font:800 .8rem Inter,sans-serif;cursor:pointer}.course-login-card #google-login-btn:disabled{opacity:.65}.course-login-card .login-privacy{margin:1rem 0 0;color:#7992a4;font-size:.62rem}.course-login-card .login-error{padding:.7rem;border-radius:8px;color:#ffcdcd;background:rgba(194,69,69,.15);font-size:.68rem}
.module-nav button.locked{opacity:.48;cursor:not-allowed}.module-nav button.locked .module-status{color:#8093a1}.module-nav button.locked:hover{color:#91a6b7;background:transparent}.course-verify-link{display:flex;align-items:center;justify-content:center;gap:.5rem;margin-top:1rem;padding:.75rem;border:1px solid rgba(71,184,200,.28);border-radius:9px;color:#a9e6ed;font-size:.7rem;font-weight:700;text-decoration:none}.course-verify-link:hover{color:#fff;background:rgba(71,184,200,.1)}
@media(max-width:720px){.course-account span{display:none}.course-account img{width:26px;height:26px}.course-account{margin-left:auto}.course-top-title{display:none}.course-login-card{padding:1.7rem}.course-login-card h2{font-size:2rem}}
.module-actions{justify-content:flex-end}