@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Fredoka:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--ink:#0b1730;--muted:#afbdd3;--paper:#101f3d;--link:#254a7b;--accent:#ffda44;--border:#33435e;--chocolate:#7b4b31;--chocolate-soft:#d1a888}
*{box-sizing:border-box}[hidden]{display:none!important}
html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;line-height:1.6;min-height:100vh}
body::before{content:'';position:fixed;inset:0;z-index:-1;background:radial-gradient(ellipse at 5% 30%,#254a7b55,transparent 50%),radial-gradient(ellipse at 95% 80%,#0b173000,transparent 45%);pointer-events:none}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button{cursor:pointer}h1,h2,h3,h4,.brand{font-family:'Space Grotesk',sans-serif;line-height:1.15}h1,h2,h3,h4,p{margin:0}h1{font-size:clamp(30px,4vw,48px);letter-spacing:-1.8px}h2{font-size:26px;letter-spacing:-.8px}p{margin-top:10px}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--link);outline-offset:4px}.muted{color:var(--muted);font-size:14px}.center{text-align:center}.skip-link{position:absolute;left:16px;top:-80px;z-index:10;background:var(--accent);padding:12px}.skip-link:focus{top:12px}
.topbar,.navbar{border-bottom:1px solid var(--border);background:#101f3de8}.topbar-inner,.navbar-inner{max-width:1240px;margin:auto;padding:22px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:700;color:var(--ink);letter-spacing:-1px}.brand:hover{text-decoration:none}.brand-mark{width:46px;height:34px;display:grid;place-items:center;background:#203553;border:1px solid #405473;border-radius:9px;color:var(--accent);flex-shrink:0;box-shadow:0 5px 14px #00000024}.brand-mark svg{width:28px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.brand-mark svg circle{fill:currentColor;stroke:none}.brand-name span{color:var(--link)}.nav-note{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:var(--muted)}.link-muted{color:var(--ink);font-size:14px;font-weight:600}.topbar .link-muted{border:1px solid var(--ink);padding:9px 18px;border-radius:50px}.navbar-user{display:flex;align-items:center;gap:12px;min-width:0}.user-name{font-size:14px;max-width:180px;overflow-wrap:anywhere}.badge{border-radius:30px;padding:5px 10px;font-size:11px;font-weight:700}.badge-admin{color:#254a7b;background:#e4ebf4}.badge-student{background:#e4ebf4;color:#254a7b}
.auth-layout{max-width:1240px;margin:0 auto;display:grid;grid-template-columns:1.2fr 1fr;gap:70px;padding:64px 32px 44px;align-items:center}.auth-promo{grid-column:1;grid-row:1;min-width:0}.eyebrow,.pill{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:2px;display:inline-flex;align-items:center;gap:8px}.eyebrow::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--link)}.hero-title{font-size:clamp(42px,4.7vw,65px);letter-spacing:-3.5px;line-height:1.04;margin:20px 0}.hero-title em{font-style:normal;color:var(--link)}.hero-copy{max-width:410px;color:var(--muted);font-size:16px}.pill{background:#e4ebf4;color:#254a7b;padding:7px 12px;border-radius:50px;font-size:10px;letter-spacing:1.5px;margin-bottom:16px}.auth-card{grid-column:2;background:#f8fafc;padding:36px;border:1px solid var(--border);border-radius:22px;box-shadow:0 14px 0 -8px #263851,0 22px 60px #00000026;animation:enter .6s both;min-width:0}.auth-card h1{font-size:32px;letter-spacing:-1.4px}.auth-card>.muted{margin-top:12px}.auth-card>.center{border-top:1px solid var(--border);padding-top:22px;margin-top:26px;font-size:13px}.auth-card>.center a{font-weight:700}.form{display:flex;flex-direction:column;gap:18px;margin-top:26px}.field{display:flex;flex-direction:column;gap:7px;min-width:0;font-size:13px;font-weight:600}.field input{width:100%;min-width:0;border:1px solid var(--border);border-radius:12px;background:#f0f4f8;padding:13px 14px;font-size:16px;font-weight:400;color:var(--ink);transition:border-color .2s,box-shadow .2s}.field input:focus{outline:none;border-color:var(--link);box-shadow:0 0 0 3px #254a7b1a}.input-with-action{display:flex;align-items:center;border:1px solid var(--border);border-radius:12px;background:#f0f4f8;padding-right:8px}.input-with-action:focus-within{border-color:var(--link);box-shadow:0 0 0 3px #254a7b1a}.input-with-action input{border:none;background:none;flex:1}.input-with-action input:focus{box-shadow:none}.input-action{border:none;background:none;padding:10px;color:var(--link);font-size:12px;min-height:44px}.form-hint{font-size:11px;color:var(--muted);text-align:center;margin:0}.btn{display:inline-flex;justify-content:center;align-items:center;gap:10px;min-height:46px;padding:11px 19px;border:1px solid transparent;border-radius:12px;font-weight:600;font-size:14px;text-align:center;transition:transform .2s,background .2s,box-shadow .2s}.btn:hover{text-decoration:none;transform:translateY(-2px)}.btn-primary{background:var(--ink);color:var(--accent);box-shadow:0 4px 0 #061021}.btn-primary:hover{background:#193357;box-shadow:0 6px 0 #061021}.btn:disabled{opacity:.6;cursor:wait;transform:none}.btn-outline{border-color:var(--border);background:#f8fafc;color:var(--ink)}.btn-outline:hover{background:#e4ebf4;border-color:#9bb0cc}.btn-danger{background:#ffebec;color:#a32536}.btn-block{width:100%}.btn-sm{font-size:12px;padding:8px 12px;min-height:44px}.alert{padding:12px 14px;border-radius:12px;font-size:14px;overflow-wrap:anywhere}.alert-error{background:#ffebec;color:#a32536}.alert-success{background:#edf6d9;color:#3b5b17}
.code-scene{position:relative;margin:30px 10px 24px 0;padding:12px 28px 12px 0;max-width:470px}.code-window{background:var(--ink);border-radius:17px;box-shadow:8px 10px 0 #314566;transform:rotate(-2deg);overflow:hidden}.window-top{display:flex;align-items:center;gap:6px;padding:14px 18px;border-bottom:1px solid #ffffff18;color:#b5b8cb;font:10px monospace}.window-top i{height:7px;width:7px;border-radius:50%;background:#ff948d}.window-top i:nth-child(2){background:#eed18b}.window-top i:nth-child(3){background:var(--accent)}.window-top span{margin-left:auto}.code-body{padding:22px 24px 28px;font:13px/2 monospace;color:#f2f0fa}.code-body .line{color:#767c96;margin-right:18px}.code-body .purple{color:#a9cbed}.code-body .green{color:var(--accent)}.code-body .comment{color:#a0a6bc}.cursor{display:inline-block;background:var(--accent);width:7px;height:15px;vertical-align:middle;animation:blink 1.2s step-end 5}.floating-label{position:absolute;right:0;bottom:0;border:1px solid var(--ink);border-radius:12px;background:var(--accent);padding:10px 15px;font-size:12px;font-weight:700;transform:rotate(5deg);animation:float 4s ease-in-out 3}.spark{position:absolute;right:3px;top:-8px;font-size:52px;line-height:1;color:var(--link);animation:float 5s ease-in-out 3}.promo-stats{display:flex;gap:28px;margin-top:26px}.promo-stats div{display:flex;flex-direction:column}.promo-stats strong{font-family:'Space Grotesk',sans-serif;font-size:23px}.promo-stats span{font-size:11px;color:var(--muted)}.auth-footer{max-width:1176px;margin:0 auto 26px;padding:20px 0;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:11px}.course-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}.course-strip span{font:11px 'Space Grotesk',sans-serif;padding:6px 11px;border:1px solid #3a4d6b;border-radius:6px;color:#c4d0e3;background:#20355380}.register-promo .hero-title{font-size:56px}.steps{margin:30px 0 0;list-style:none;padding:0;display:grid;gap:18px}.steps li{display:flex;gap:14px;align-items:center;font-size:14px}.steps b{display:grid;place-items:center;background:#203553;border-radius:12px;width:40px;height:40px;font-family:'Space Grotesk',sans-serif}.steps span{color:var(--muted)}
.page{max-width:1240px;margin:auto;padding:36px 32px 70px}.page-header{position:relative;padding:36px 40px;border-radius:24px;background:var(--ink);color:#fff;overflow:hidden;margin-bottom:32px;animation:enter .5s both}.page-header::after{content:'{ }';position:absolute;right:40px;top:-35px;font:bold 220px 'Space Grotesk',sans-serif;color:#ffffff0b;transform:rotate(12deg);pointer-events:none}.page-header .eyebrow{color:var(--accent);margin-bottom:18px}.page-header .eyebrow::before{background:var(--accent)}.page-header .muted{color:#c2cfe2;max-width:600px;margin-top:12px}.page-header h1{position:relative;z-index:1;overflow-wrap:anywhere}.hero-tag{display:inline-block;margin-top:24px;border:1px solid #ffffff30;border-radius:30px;padding:5px 12px;font-size:11px;color:#c2cfe2}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:30px 0 20px}.section-heading h2{font-size:23px}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.course-card{display:block;position:relative;min-width:0;padding:25px;border:1px solid #344966;background:#182d4d;border-radius:20px;color:var(--ink);overflow:hidden;transition:transform .25s,box-shadow .25s;animation:enter .5s both}.course-card:nth-child(2){background:#1c3152;animation-delay:60ms}.course-card:nth-child(3){background:#182d4d;animation-delay:120ms}.course-card:nth-child(4){background:#1c3152;animation-delay:180ms}.course-card:nth-child(5){background:#182d4d;animation-delay:240ms}.course-card:nth-child(6){background:#1c3152;animation-delay:300ms}.course-card:hover{transform:translateY(-6px) rotate(-.4deg);box-shadow:0 12px 22px #00000030;text-decoration:none}.course-card-badge{display:grid;place-items:center;width:54px;height:54px;background:var(--ink);color:#fff;border-radius:15px;font:bold 15px 'Space Grotesk',sans-serif;margin:12px 0 26px;transform:rotate(-5deg)}.course-number{position:absolute;right:22px;top:22px;font:12px monospace;color:#b5c4d9}.course-card h3{font-size:25px;letter-spacing:-.8px}.course-card .muted{font-size:13px;color:#b5c4d9}.course-card-footer{border-top:1px solid #0b173020;margin-top:24px;padding-top:16px;display:flex;justify-content:space-between;gap:10px;font-size:12px}.course-card-arrow{font-weight:700;color:var(--ink)}.learning-note{margin-top:26px;display:flex;align-items:center;gap:16px;border:1px dashed #405473;border-radius:16px;padding:18px 22px;background:#172b48}.learning-note>span{font-size:26px;color:var(--link)}.learning-note p{margin:0;font-size:13px;color:var(--muted)}.learning-note strong{color:var(--ink)}
.back-link{display:inline-block;margin-bottom:24px}.course-header{display:flex;align-items:center;gap:22px;background:#182d4d;border:1px solid #344966;border-radius:22px;padding:32px;margin-bottom:26px}.course-header>div{min-width:0}.course-header h1{font-size:36px;overflow-wrap:anywhere}.course-header-badge{display:grid;place-items:center;flex-shrink:0;width:70px;height:70px;border-radius:18px;background:var(--course-color,var(--link));color:white;font-family:'Space Grotesk',sans-serif;font-weight:bold;transform:rotate(-5deg)}.card{border:1px solid var(--border);background:#f8fafc;border-radius:20px;padding:28px;margin-bottom:24px;min-width:0;animation:enter .5s both}.card h2{font-size:23px}.materials-list{display:flex;flex-direction:column;gap:12px;margin-top:22px}.material-item{display:flex;align-items:center;gap:16px;padding:18px;border:1px solid var(--border);border-radius:14px;min-width:0;background:#f0f4f8}.material-icon{display:grid;place-items:center;background:#dfe8f4;color:#254a7b;border-radius:12px;width:44px;height:52px;font-size:11px;font-weight:700;flex-shrink:0}.material-info{flex:1;min-width:0;overflow-wrap:anywhere}.material-info h4{font-size:16px;line-height:1.4}.material-info p{margin-top:5px}.material-meta{font-size:12px;color:var(--muted)}.material-actions{display:flex;gap:8px;flex-wrap:wrap;flex-shrink:0}.empty-state{padding:32px 18px;text-align:center;border:1px dashed #b5c5d9;border-radius:14px;background:#edf2f8}.empty-state strong{display:block;margin-bottom:6px;color:var(--ink)}input[type=file]{padding:10px;font-size:13px}input::file-selector-button{border:0;border-radius:7px;background:#dfe8f4;color:#254a7b;padding:9px;margin-right:10px;cursor:pointer}.page-footer{text-align:center;margin-top:38px;font:11px 'Space Grotesk',sans-serif;color:var(--muted);letter-spacing:1px}

/* Midnight blue is the main surface; duck yellow is reserved for small accents. */
body{color:#edf3fc}
.skip-link{color:var(--ink)}
a{color:#ffda44}
.topbar,.navbar{background:#0b1730;border-bottom-color:#2b3f5c}
.brand,.link-muted,.user-name{color:#edf3fc}
.brand-name span{color:#ffda44}
.topbar .link-muted{border-color:#63748f}
.eyebrow::before{background:var(--accent)}
.hero-title em{color:var(--accent)}
.auth-card,.card{--muted:#5b6b82;--border:#cdd8e5;color:var(--ink)}
.auth-card a,.card a{color:#254a7b}
.auth-card .btn-primary,.card .btn-primary{color:var(--accent)}
.auth-card .btn-danger,.card .btn-danger{color:#a32536}
.auth-card .btn-outline,.card .btn-outline{color:var(--ink)}
.badge-admin,.badge-student{background:#263c5b;color:#dce8f8}
.auth-promo .steps b{color:var(--accent)}
.code-window{background:#071226;border:1px solid #3a4d6b}
.code-body .line{color:#95a6c1}
.window-top i{background:#8fa7c8}
.window-top i:nth-child(2){background:#bbcee7}
.window-top i:nth-child(3){background:var(--accent)}
.spark{color:var(--accent)}
.floating-label{color:var(--ink)}
.page-header{background:#071226;border:1px solid #33435e}
.course-card{color:#edf3fc}
.course-card-badge{background:#0b1730;color:var(--accent);border:1px solid #405473}
.course-card-footer{border-top-color:#405473}
.course-card-arrow{color:var(--accent)}
.learning-note>span{color:var(--accent)}
.learning-note strong{color:#edf3fc}
.course-header-badge{background:#0b1730;color:var(--accent);border:1px solid #405473}
.course-header .eyebrow{color:var(--accent)}
.btn-outline:focus-visible,.btn-outline:hover{color:var(--ink)}

/* Rounded, light titles and chocolate-toned secondary copy. */
h1,h2,h3,h4,.brand{font-family:'Fredoka','DM Sans',sans-serif;font-weight:500}.brand{font-weight:500;letter-spacing:-.35px}.hero-title{font-weight:500}.course-card h3{letter-spacing:-.25px}
.muted,.hero-copy,.nav-note,.promo-stats span,.auth-footer,.steps span,.learning-note p,.page-footer{color:var(--chocolate-soft)}.page-header .muted,.hero-tag,.course-card .muted,.course-header .muted{color:var(--chocolate-soft)}.auth-card .muted,.card .muted,.auth-card .form-hint,.card .material-meta{color:var(--chocolate)}
@keyframes enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,100%{translate:0 0}50%{translate:0 -8px}}@keyframes blink{50%{opacity:0}}
@media(min-width:1100px){#upload-form{display:grid;grid-template-columns:1fr 1fr}#upload-form .alert{grid-column:1/-1}#upload-btn{align-self:end}}
@media(max-width:1000px){.auth-layout{gap:32px;padding-top:44px}.auth-card{padding:26px}.hero-title{font-size:49px}.nav-note{display:none}.material-item{flex-wrap:wrap}.material-actions{margin-left:60px}.auth-footer{margin-left:32px;margin-right:32px}.course-grid{gap:14px}.course-card{padding:20px}}
@media(max-width:760px){.auth-layout{grid-template-columns:minmax(0,1fr);max-width:560px;gap:30px;padding:32px 22px}.auth-promo{grid-row:auto;grid-column:1}.auth-card{grid-column:1;padding:28px}.hero-title,.register-promo .hero-title{font-size:46px;letter-spacing:-2.5px}.hero-copy{font-size:14px}.code-scene{display:none}.promo-stats{gap:28px;margin-top:18px}.promo-stats strong{font-size:20px}.course-strip{margin-top:18px}.auth-footer{margin:0 22px 20px}.topbar-inner,.navbar-inner{padding:17px 22px}.brand{font-size:21px}.brand-mark{width:40px;height:31px}.brand-mark svg{width:25px;height:20px}.navbar-inner{flex-wrap:wrap;gap:14px}.navbar-user{width:100%;justify-content:flex-end;padding-top:12px;border-top:1px solid var(--border)}.navbar-user .user-name{margin-right:auto}.page{padding:25px 22px 40px}.page-header{padding:28px}.page-header h1{font-size:36px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-card h3{font-size:23px}.course-header{padding:24px}.steps{gap:12px;margin-top:20px}.steps li{font-size:13px}.steps b{height:32px;width:32px}.section-heading .muted{font-size:12px}}
@media(max-width:440px){.topbar-inner{gap:10px;padding:16px}.brand{font-size:19px}.topbar .link-muted{padding:8px 12px;font-size:12px}.auth-layout{padding:28px 16px}.auth-card{padding:24px 20px}.hero-title,.register-promo .hero-title{font-size:42px}.auth-card h1{font-size:29px}.auth-footer{margin-left:16px;margin-right:16px;flex-wrap:wrap;gap:4px}.promo-stats{justify-content:space-between;gap:12px}.course-strip{gap:6px}.course-strip span{font-size:10px;padding:5px 8px}.page{padding:22px 16px 36px}.navbar-inner{padding:16px}.navbar-user{gap:8px}.user-name{font-size:12px;max-width:130px}.page-header{padding:25px 22px}.page-header h1{font-size:32px}.page-header::after{right:0;font-size:150px;top:20px}.course-grid{grid-template-columns:minmax(0,1fr);gap:16px}.course-card{padding:24px}.course-card-badge{margin:0 0 20px}.course-card-footer{margin-top:20px}.section-heading{gap:8px}.section-heading h2{font-size:22px}.course-header{gap:16px;padding:22px 18px}.course-header h1{font-size:28px}.course-header-badge{width:54px;height:54px;font-size:13px}.card{padding:20px 16px}.material-item{padding:14px;gap:12px}.material-actions{margin-left:0;width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.material-actions .btn{padding:8px;font-size:12px}.material-actions .btn-danger{grid-column:1/-1}.material-info{flex-basis:calc(100% - 60px)}.learning-note{padding:16px}.section-heading>.muted{max-width:95px;text-align:right}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.btn:hover,.course-card:hover{transform:none}}