:root {
  --ink: #172b3f; --muted: #64748b; --blue: #2167a3; --navy: #0d2f4d;
  --orange: #f48120; --orange-dark: #d9670d; --paper: #f5f7fa; --surface: #fff;
  --surface-2: #eef3f8; --line: #dce4ec; --good: #16836d; --warn: #d78510;
  --danger: #c44545; --shadow: 0 16px 50px rgba(13,47,77,.11); --radius: 20px;
  --sidebar: 264px;
}
html[data-theme="dark"] { --ink:#edf4fa; --muted:#9fb0c0; --navy:#f5f9fc; --paper:#0a1723; --surface:#102436; --surface-2:#162f44; --line:#29455b; --shadow:0 18px 55px rgba(0,0,0,.28); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin:0; font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color:var(--ink); background:var(--paper); line-height:1.55; }
body.auth-locked{overflow:hidden}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:28px;background:radial-gradient(circle at 80% 15%,rgba(244,129,32,.2),transparent 30%),linear-gradient(145deg,#061b2c,#0c385c)}.auth-screen[hidden]{display:none}.auth-panel{width:min(430px,100%);background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:38px;box-shadow:0 28px 70px rgba(0,0,0,.3)}.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:36px}.auth-brand div{display:flex;flex-direction:column}.auth-brand strong{color:var(--navy);font-size:15px}.auth-brand small{color:var(--muted);font-size:11px}.auth-panel h1{font-size:34px;margin-bottom:10px}.auth-intro{color:var(--muted);font-size:14px;margin:0 0 26px}.auth-form{display:grid;gap:9px}.auth-form label{font-size:12px;font-weight:750;color:var(--ink);margin-top:5px}.auth-form input{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px 13px;background:var(--paper);color:var(--ink);font:inherit;outline:none}.auth-form input:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(244,129,32,.16)}.password-field{position:relative}.password-field input{padding-right:76px}.password-field button{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:0;background:transparent;color:var(--blue);font-size:11px;font-weight:750;cursor:pointer}.auth-submit{margin-top:14px;width:100%}.auth-submit:disabled{opacity:.6;cursor:wait}.auth-error{min-height:20px;margin:4px 0 0;color:var(--danger);font-size:12px}.auth-note{margin:20px 0 0;padding-top:17px;border-top:1px solid var(--line);color:var(--muted);font-size:11px;text-align:center}.logout-button{white-space:nowrap}
button,input,select { font:inherit; }
button,a { -webkit-tap-highlight-color: transparent; }
a { color:var(--blue); }
.skip-link { position:fixed; top:-80px; left:20px; z-index:100; background:var(--surface); padding:12px 18px; border-radius:10px; }
.skip-link:focus { top:20px; }
.app-shell { min-height:100vh; }
.sidebar { position:fixed; inset:0 auto 0 0; width:var(--sidebar); background:#0b2d49; color:#fff; display:flex; flex-direction:column; z-index:20; }
.brand { display:flex; align-items:center; gap:12px; padding:26px 24px 20px; border-bottom:1px solid rgba(255,255,255,.1); }
.brand-mark { width:38px; height:38px; border-radius:12px; background:linear-gradient(135deg,#ff9f43,var(--orange)); display:grid; place-items:center; font-weight:800; box-shadow:0 8px 20px rgba(244,129,32,.3); }
.brand strong,.brand small { display:block; }.brand strong{font-size:15px}.brand small{font-size:12px;color:#a9bfd0;margin-top:1px}
#courseNav { padding:18px 12px; overflow:auto; flex:1; }
.nav-button { width:100%; border:0; background:transparent; color:#bcd0df; border-radius:10px; padding:10px 12px; display:flex; align-items:center; gap:11px; text-align:left; cursor:pointer; margin:2px 0; font-size:14px; }
.nav-button:hover { background:rgba(255,255,255,.07); color:#fff; }.nav-button.active { background:rgba(244,129,32,.17); color:#fff; }.nav-button.active .nav-icon { color:#ffad66; }
.nav-icon { width:22px; text-align:center; font-size:15px; }
.sidebar-footer { padding:18px 24px 24px; border-top:1px solid rgba(255,255,255,.1); color:#bcd0df; font-size:12px; }
.sidebar-footer p { margin:8px 0; }.sidebar-footer strong{color:#fff}.mini-progress{height:5px;background:rgba(255,255,255,.15);border-radius:99px;overflow:hidden}.mini-progress span{display:block;height:100%;width:0;background:var(--orange);transition:.3s}
.text-button { border:0; color:#bcd0df; background:none; padding:0; cursor:pointer; font-size:12px; }.text-button:hover{color:#fff}
.page { margin-left:var(--sidebar); min-height:100vh; }
.topbar { height:66px; position:sticky; top:0; z-index:15; display:flex; align-items:center; justify-content:space-between; padding:0 36px; background:color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter:blur(14px); border-bottom:1px solid var(--line); }
.breadcrumb { font-size:13px; color:var(--muted); font-weight:650; }.top-actions{display:flex;align-items:center;gap:10px}.icon-button{width:38px;height:38px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;cursor:pointer}.menu-button{display:none}.pill-link{font-size:13px;text-decoration:none;border:1px solid var(--line);padding:8px 13px;border-radius:99px;background:var(--surface);font-weight:650}
main { max-width:1320px; margin:0 auto; padding:42px 48px 90px; }
.view { display:none; animation:fade .28s ease; }.view.active{display:block}@keyframes fade{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.eyebrow { font-size:11px; letter-spacing:.13em; font-weight:800; color:var(--orange-dark); margin:0 0 10px; }
h1,h2,h3 { color:var(--navy); line-height:1.15; margin-top:0; }h1{font-size:clamp(32px,4vw,54px);letter-spacing:-.035em}h2{font-size:23px;letter-spacing:-.02em}h3{font-size:17px}.lead{font-size:19px;color:var(--muted);max-width:720px}
.hero { display:grid; grid-template-columns:1.18fr .82fr; min-height:590px; background:var(--surface); border:1px solid var(--line); border-radius:28px; overflow:hidden; box-shadow:var(--shadow); }
.hero-copy { padding:70px 64px; }.hero-copy h1{max-width:780px}.hero-actions{display:flex;gap:12px;margin:32px 0 44px;flex-wrap:wrap}.primary-button,.secondary-button{border:0;border-radius:11px;padding:12px 18px;font-weight:750;cursor:pointer}.primary-button{background:var(--orange);color:#17202a;box-shadow:0 7px 18px rgba(244,129,32,.2)}.primary-button:hover{background:#ff963b}.secondary-button{background:var(--surface-2);color:var(--ink);border:1px solid var(--line)}
.hero-facts{display:flex;gap:32px}.hero-facts div{display:flex;flex-direction:column}.hero-facts strong{font-size:26px;color:var(--navy)}.hero-facts span{font-size:12px;color:var(--muted)}
.hero-visual { background:linear-gradient(150deg,#0c3454,#071e33); color:white; padding:70px 46px; display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative}.signal{width:210px;border:1px solid rgba(255,255,255,.25);border-radius:14px;padding:13px 16px;display:grid;grid-template-columns:36px 1fr;column-gap:9px;background:rgba(255,255,255,.06)}.signal span{grid-row:1/3;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.12);font-size:12px}.signal b{font-size:14px}.signal small{color:#a7c0d3}.signal.active{border-color:var(--orange);box-shadow:0 0 0 3px rgba(244,129,32,.15)}.signal.active span{background:var(--orange);color:#17202a}.flow-line{height:34px;border-left:2px dashed rgba(255,255,255,.24)}.hero-note{margin-top:34px;font-size:12px;line-height:1.5;color:#c4d4df;display:flex;gap:10px}.hero-note span{width:7px;height:7px;margin-top:5px;border-radius:50%;background:var(--orange);flex:none}
.decision-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.decision-strip>div{background:var(--surface);border:1px solid var(--line);padding:18px 20px;border-radius:14px}.decision-strip strong{font-size:14px}.decision-strip p{margin:4px 0 0;color:var(--muted);font-size:13px}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:8px}.good{background:var(--good)}.warn{background:var(--warn)}.info{background:var(--blue)}
.section-head { max-width:830px; margin-bottom:32px; }.section-head h1{font-size:40px;margin-bottom:12px}.section-head>p:last-child{color:var(--muted);font-size:16px}
.study-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.study-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;display:grid;grid-template-columns:44px 1fr auto;gap:15px;align-items:start;cursor:pointer;transition:.2s}.study-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.study-number{width:44px;height:44px;border-radius:13px;background:var(--surface-2);display:grid;place-items:center;font-weight:800;color:var(--blue)}.study-card h2{font-size:17px;margin:2px 0 6px}.study-card p{margin:0;color:var(--muted);font-size:13px}.study-card input{width:20px;height:20px;accent-color:var(--good)}
.segmented{display:inline-flex;padding:4px;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;margin-bottom:18px}.segmented button{border:0;background:transparent;color:var(--muted);padding:9px 14px;border-radius:9px;cursor:pointer;font-weight:700;font-size:13px}.segmented button.active{background:var(--surface);color:var(--ink);box-shadow:0 3px 12px rgba(13,47,77,.09)}
.architecture-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px}.architecture-canvas,.detail-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.architecture-canvas{min-height:560px;padding:28px;display:grid;grid-template-columns:repeat(12,1fr);grid-template-rows:repeat(7,68px);gap:8px;position:relative;overflow:hidden}.arch-node{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:9px 12px;text-align:left;cursor:pointer;z-index:2;box-shadow:0 8px 20px rgba(13,47,77,.07);position:relative}.arch-node:hover,.arch-node.selected{border-color:var(--orange);box-shadow:0 0 0 3px rgba(244,129,32,.12)}.arch-node b,.arch-node small{display:block}.arch-node b{font-size:13px;color:var(--navy)}.arch-node small{font-size:10px;color:var(--muted);margin-top:3px}.arch-node.edge{border-top:4px solid var(--orange)}.arch-node.azure{border-top:4px solid #2e74b5}.arch-node.legacy{border-top:4px solid #244f72}.arch-line{position:absolute;background:var(--line);z-index:1;transform-origin:left center}.detail-panel{padding:28px}.detail-panel h2{margin-bottom:10px}.detail-panel p,.detail-panel li{font-size:13px;color:var(--muted)}.detail-panel ul{padding-left:18px}.tag{display:inline-flex;padding:4px 8px;border-radius:99px;background:var(--surface-2);font-size:10px;font-weight:800;color:var(--blue);margin:3px 3px 0 0}.callout{margin-top:18px;border-radius:13px;padding:16px 18px;background:var(--surface);border:1px solid var(--line);font-size:13px}.callout.warning{border-left:4px solid var(--orange)}
.module-tabs{display:flex;gap:7px;overflow:auto;padding-bottom:9px;margin-bottom:18px}.module-tab{flex:none;border:1px solid var(--line);background:var(--surface);color:var(--muted);width:38px;height:38px;border-radius:10px;cursor:pointer;font-weight:800}.module-tab.active{background:var(--navy);color:var(--paper);border-color:var(--navy)}.lesson{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}.lesson-header{display:grid;grid-template-columns:1fr auto;gap:20px;border-bottom:1px solid var(--line);padding-bottom:25px;margin-bottom:25px}.lesson-header h2{font-size:30px;margin-bottom:9px}.lesson-header p{margin:0;color:var(--muted)}.lesson-badge{width:66px;height:66px;border-radius:18px;background:var(--surface-2);display:grid;place-items:center;font-size:25px;font-weight:850;color:var(--orange-dark)}.lesson-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:34px}.lesson-copy h3{margin:24px 0 8px;color:var(--blue)}.lesson-copy p,.lesson-copy li{font-size:14px}.lesson-copy ul{padding-left:20px}.lesson-aside{background:var(--surface-2);border-radius:14px;padding:20px;align-self:start}.lesson-aside h3{font-size:14px}.lesson-aside li{font-size:13px;margin-bottom:7px}.lesson-check{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px}.complete-button.done{background:var(--good);color:white}
.lab-grid{display:grid;grid-template-columns:360px 1fr;gap:18px}.control-card,.result-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.control-card{display:flex;flex-direction:column;gap:16px}.control-card label{font-size:12px;font-weight:750;color:var(--muted)}.control-card select{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink)}.switch-label{display:flex;align-items:center;gap:10px;color:var(--ink)!important}.switch-label input{display:none}.switch-label span{width:38px;height:22px;border-radius:99px;background:#aab8c5;position:relative}.switch-label span:after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:white;top:3px;left:3px;transition:.2s}.switch-label input:checked+span{background:var(--good)}.switch-label input:checked+span:after{left:19px}.result-card{min-height:420px;display:flex;flex-direction:column}.result-state{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:18px}.result-state strong{font-size:34px}.result-state .safe{color:var(--good)}.result-state .bypass{color:var(--danger)}.route-visual{display:flex;align-items:center;justify-content:center;gap:7px;margin:36px 0;flex-wrap:wrap}.route-step{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:12px;font-weight:750;background:var(--surface-2)}.route-step.stop{background:#dff4ee;color:#0c6755;border-color:#8fd2c5}.route-arrow{color:var(--muted)}.reason-list{display:grid;gap:8px}.reason-list div{font-size:13px;padding:10px 12px;background:var(--surface-2);border-radius:9px}.reason-list .negative{border-left:3px solid var(--danger)}.reason-list .positive{border-left:3px solid var(--good)}
.price-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:22px}.price-cards article{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.price-cards article:first-child{border-top:4px solid var(--orange)}.price-cards h2{font-size:30px;margin-bottom:8px}.price-cards p:not(.eyebrow){color:var(--muted);font-size:13px}.price-cards span{font-size:11px;font-weight:800;padding:6px 9px;background:var(--surface-2);border-radius:99px}.price-cards .recommendation{background:#dff4ee;color:#0c6755}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:13px}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:var(--surface-2);font-size:11px;letter-spacing:.03em}tbody tr:last-child td{border-bottom:0}.decision-box{margin-top:18px;padding:24px;background:linear-gradient(135deg,#0e385a,#0a2943);color:#dce9f2;border-radius:var(--radius)}.decision-box h2{color:white}.decision-box p{margin-bottom:0}
.timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:25px 0 34px}.timeline-step{position:relative;background:var(--surface);border:1px solid var(--line);padding:16px 13px;border-radius:13px;min-height:120px}.timeline-step span{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--surface-2);color:var(--blue);font-size:11px;font-weight:800}.timeline-step h3{font-size:13px;margin:12px 0 6px}.timeline-step p{font-size:11px;color:var(--muted);margin:0}.migration-grid{display:grid;grid-template-columns:1fr 360px;gap:28px}.checklist{display:grid;gap:9px}.check-item{display:flex;gap:11px;align-items:flex-start;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:11px;font-size:13px}.check-item input{margin-top:3px;accent-color:var(--good)}.check-item.done{opacity:.65}.rollback-card{background:#fff7ed;color:#743f14;border:1px solid #f6c893;border-radius:var(--radius);padding:25px;align-self:start}.rollback-card h2{color:#743f14}.rollback-card p,.rollback-card li{font-size:13px}.rollback-card li{margin-bottom:8px}
.flash-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;color:var(--muted)}.flash-toolbar div{display:flex;gap:8px}.flashcard{border:0;background:transparent;display:block;width:min(720px,100%);height:350px;margin:0 auto;position:relative;perspective:1200px;cursor:pointer}.flash-face{position:absolute;inset:0;display:grid;place-items:center;padding:50px;border-radius:26px;backface-visibility:hidden;transition:transform .5s;box-shadow:var(--shadow);font-size:26px;font-weight:750;line-height:1.35}.front{background:linear-gradient(145deg,#0c385c,#092641);color:white}.back{background:var(--surface);color:var(--ink);border:1px solid var(--line);transform:rotateY(180deg);font-size:20px;font-weight:550}.flashcard.flipped .front{transform:rotateY(180deg)}.flashcard.flipped .back{transform:rotateY(360deg)}.center{text-align:center}.muted{color:var(--muted);font-size:13px}
.quiz-intro{display:flex;gap:28px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:34px}.score-ring{width:130px;height:130px;border:10px solid var(--surface-2);border-top-color:var(--orange);border-radius:50%;display:grid;place-items:center;flex:none}.score-ring strong,.score-ring span{grid-area:1/1}.score-ring strong{font-size:36px;transform:translateY(-10px)}.score-ring span{font-size:11px;color:var(--muted);transform:translateY(21px)}.quiz-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:32px}.quiz-progress{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin-bottom:28px}.quiz-progress span{display:block;height:100%;background:var(--orange)}.quiz-question{font-size:23px;font-weight:750;color:var(--navy);margin-bottom:22px}.quiz-options{display:grid;gap:10px}.quiz-option{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:11px;padding:13px 15px;text-align:left;cursor:pointer}.quiz-option:hover{border-color:var(--blue)}.quiz-option.correct{border-color:var(--good);background:#e5f6f1;color:#0d6555}.quiz-option.wrong{border-color:var(--danger);background:#fff0f0;color:#8c2929}.quiz-option:disabled{cursor:default}.quiz-explanation{margin-top:18px;padding:16px;background:var(--surface-2);border-radius:11px;font-size:13px}.quiz-actions{display:flex;justify-content:space-between;align-items:center;margin-top:18px}.quiz-result{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:48px}.quiz-result strong{font-size:54px;color:var(--orange-dark);display:block}
.search-box{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0 14px;margin-bottom:20px}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--ink);padding:13px 0}.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.term-card{background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:18px}.term-card h2{font-size:16px;margin-bottom:7px}.term-card p{font-size:13px;color:var(--muted);margin:0}
.resource-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.resource-card{display:block;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:15px;padding:20px;color:var(--ink);transition:.2s}.resource-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--orange)}.resource-card>span{font-size:10px;font-weight:850;color:var(--orange-dark)}.resource-card h2{font-size:17px;margin:10px 0 7px}.resource-card p{font-size:12px;color:var(--muted);margin:0}.media-section{margin-top:34px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.media-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.media-heading>div{max-width:690px}.media-heading p:last-child{color:var(--muted);font-size:13px}.notebook-button{display:inline-block;text-decoration:none;white-space:nowrap}.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:18px}.media-player-card{background:var(--surface-2);border-radius:14px;padding:18px;min-width:0}.video-player-card{grid-column:1/-1}.media-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:14px}.media-card-head h3{font-size:17px;margin:5px 0}.media-card-head p{font-size:11px;color:var(--muted);margin:0}.media-card-head a{font-size:10px;font-weight:800;text-decoration:none;white-space:nowrap;color:var(--blue)}.media-player-card video{display:block;width:100%;max-height:560px;background:#071e33;border-radius:11px}.media-player-card audio{display:block;width:100%;margin-top:18px}.media-card{min-height:150px;padding:17px;background:var(--surface-2);border:1px solid transparent;border-radius:12px;color:var(--ink);text-decoration:none;display:grid;grid-template-columns:38px 1fr;grid-template-rows:auto auto 1fr auto;column-gap:12px;transition:.2s}.media-card:hover{border-color:var(--orange);transform:translateY(-2px)}.media-icon{grid-row:1/5;width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:var(--navy);color:var(--paper);font-weight:800}.media-meta{font-size:9px;letter-spacing:.08em;font-weight:850;color:var(--orange-dark)}.media-card b,.media-card small,.media-card em{display:block}.media-card b{font-size:13px;margin:5px 0}.media-card small{color:var(--muted);font-size:11px;line-height:1.45}.media-card em{font-size:9px;letter-spacing:.05em;font-style:normal;font-weight:850;color:var(--blue);margin-top:10px}.infographic-card{margin:20px 0 0;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr);gap:0;background:var(--surface-2);border-radius:14px;overflow:hidden}.infographic-card a{display:block;min-width:0;background:var(--navy)}.infographic-card img{display:block;width:100%;height:100%;max-height:430px;object-fit:contain}.infographic-card figcaption{padding:24px;display:flex;flex-direction:column;justify-content:center}.infographic-card figcaption span{font-size:9px;letter-spacing:.08em;font-weight:850;color:var(--orange-dark)}.infographic-card figcaption strong{font-size:19px;color:var(--navy);margin:8px 0}.infographic-card figcaption small{font-size:12px;color:var(--muted);line-height:1.5}.sources{margin-top:20px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:17px}.sources summary{cursor:pointer;font-weight:750}.sources a{display:block;font-size:12px;margin-top:9px;word-break:break-word}.toast{position:fixed;right:25px;bottom:25px;background:#0b2d49;color:white;padding:12px 16px;border-radius:11px;box-shadow:var(--shadow);font-size:13px;opacity:0;transform:translateY(10px);pointer-events:none;transition:.25s;z-index:99}.toast.show{opacity:1;transform:none}
@media(max-width:1050px){.hero{grid-template-columns:1fr}.hero-visual{min-height:420px}.architecture-layout,.migration-grid{grid-template-columns:1fr}.detail-panel{min-height:220px}.timeline{grid-template-columns:repeat(3,1fr)}.resource-grid{grid-template-columns:repeat(2,1fr)}.glossary-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){:root{--sidebar:0px}.sidebar{width:270px;transform:translateX(-100%);transition:.25s;box-shadow:var(--shadow)}.sidebar.open{transform:none}.page{margin-left:0}.menu-button{display:inline-grid;place-items:center}.topbar{padding:0 18px}main{padding:28px 18px 70px}.hero-copy{padding:45px 28px}.decision-strip,.study-grid,.price-cards,.lab-grid{grid-template-columns:1fr}.architecture-canvas{min-height:620px;padding:14px}.lesson{padding:24px}.lesson-grid{grid-template-columns:1fr}.timeline{grid-template-columns:repeat(2,1fr)}.glossary-grid{grid-template-columns:1fr}.media-heading{display:block}.notebook-button{margin-top:10px}.media-grid,.infographic-card{grid-template-columns:1fr}.video-player-card{grid-column:auto}.infographic-card img{height:auto}.pill-link{display:none}}
@media(max-width:500px){h1,.section-head h1{font-size:32px}.hero-facts{gap:20px}.hero-visual{padding:50px 25px}.architecture-canvas{grid-template-rows:repeat(8,66px)}.resource-grid{grid-template-columns:1fr}.timeline{grid-template-columns:1fr}.quiz-intro{align-items:flex-start;flex-direction:column}.flash-face{font-size:21px;padding:30px}.lesson-header{grid-template-columns:1fr}.lesson-badge{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}