:root{--cream:#fff9f2;--white:#fff;--ink:#14213d;--muted:#59647a;--line:#e6e2dd;--teal:#147f7f;--teal-dark:#0d6666;--orange:#ff6b35;--shadow:0 12px 36px rgba(20,33,61,.08)}
*{box-sizing:border-box}
html{min-height:100%;background:var(--cream)}
body{margin:0;color:var(--ink);font-family:Inter,Arial,sans-serif;line-height:1.5;min-height:100vh;display:flex;flex-direction:column}
[hidden]{display:none!important}
.demo-banner{background:#14213d;color:#fff;text-align:center;font:900 12px Nunito,sans-serif;letter-spacing:.08em;padding:9px 12px}
button,input{font:inherit}
button{cursor:pointer}
a{color:var(--teal)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:3px}
.topbar{width:100%;max-width:1080px;margin:0 auto;padding:24px 24px 12px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font:900 15px Nunito,sans-serif;letter-spacing:.11em;text-decoration:none}
.brand-mark{width:21px;height:21px;flex:none;border:6px solid var(--orange);border-radius:50%}
.text-button{border:0;background:none;color:var(--muted);text-decoration:underline;text-underline-offset:4px;font-weight:700;padding:6px}
main{flex:1;width:100%}
.auth-card{width:min(100% - 32px,450px);margin:30px auto 72px;padding:34px;background:var(--white);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
.cover-stack{height:86px;display:flex;justify-content:center;align-items:center;margin-bottom:12px}
.cover-stack img{width:63px;height:82px;object-fit:cover;border-radius:5px;box-shadow:0 3px 9px rgba(20,33,61,.2);margin-left:-8px}
.cover-stack img:nth-child(1){transform:rotate(-8deg)}.cover-stack img:nth-child(2){transform:rotate(5deg)}.cover-stack img:nth-child(3){transform:rotate(-3deg)}.cover-stack img:nth-child(4){transform:rotate(8deg)}
.eyebrow{margin:0 0 8px;color:var(--orange);text-transform:uppercase;letter-spacing:.14em;font:900 12px Nunito,sans-serif}
h1,h2{font-family:Nunito,Arial,sans-serif;line-height:1.17;letter-spacing:-.015em}
h1{font-size:clamp(28px,5vw,36px);margin:0 0 10px;font-weight:900}
.intro{color:var(--muted);margin:0 0 26px}
form{display:flex;flex-direction:column}
label{font-weight:700;font-size:14px;margin:0 0 7px}
input{width:100%;padding:14px 15px;border:1.5px solid #cdd4d8;border-radius:12px;background:#fff;color:var(--ink);margin:0 0 17px}
input::placeholder{color:#89939f}
.primary-button{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:52px;border:0;border-radius:13px;background:var(--teal);color:#fff;font-weight:800;text-align:center;padding:12px 16px;text-decoration:none}
.primary-button:hover{background:var(--teal-dark)}
.primary-button:disabled{opacity:.65;cursor:wait}
.primary-button span{font-size:21px;line-height:1}
.help{color:var(--muted);font-size:13px;text-align:center;margin:18px 0 0}
.help + .help{margin-top:7px}
.help a{font-weight:700}
.form-error{color:#ac3030;background:#fff1ef;padding:10px 12px;border-radius:9px;font-size:13px;margin:0 0 16px}
.success-card{text-align:center}
.success-card form{text-align:left}
.success-icon{display:grid;place-items:center;width:62px;height:62px;margin:0 auto 22px;border-radius:50%;background:#e4f5ef;color:#167d61;font-size:32px;font-weight:900}
.account-email{background:#f5f8f8;border-radius:10px;padding:12px;font-size:14px;overflow-wrap:anywhere;margin:0 0 18px}
.hint{color:var(--muted);font-size:12px;margin:-4px 0 18px}
.retry{margin-top:16px}
.library{width:min(100% - 32px,880px);margin:40px auto 72px}
.library-heading{text-align:center;margin-bottom:30px}
.library-heading h1{margin-bottom:5px}
.library-heading>p:last-child{color:var(--muted);margin:0}
.download-all{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:24px;background:#eaf6f4;border:1px solid #d5eae5;border-radius:18px;margin-bottom:24px}
.download-all strong,.download-all span{display:block}
.download-all strong{font:900 19px Nunito,sans-serif}
.download-all div span{color:var(--muted);font-size:13px;margin-top:3px}
.download-all a{background:var(--teal);color:#fff;text-decoration:none;font-weight:800;border-radius:12px;padding:13px 17px;white-space:nowrap}
.download-all a:hover{background:var(--teal-dark)}
.download-all a span{display:inline}
.sections{display:grid;gap:12px}
.material-section{background:var(--white);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.material-section summary{display:flex;align-items:center;gap:12px;padding:18px 20px;font:900 18px Nunito,sans-serif;cursor:pointer;list-style:none}
.material-section summary::-webkit-details-marker{display:none}
.material-section summary::after{content:"⌄";margin-left:auto;color:var(--muted);font-size:22px;line-height:1;transition:transform .2s}
.material-section[open] summary::after{transform:rotate(180deg)}
.section-count{display:inline-grid;place-items:center;min-width:28px;height:28px;border-radius:99px;background:#fff0e8;color:#d75a2e;font:900 13px Nunito,sans-serif;padding:0 6px}
.material-list{border-top:1px solid var(--line);padding:0 20px;list-style:none;margin:0}
.material-list li{display:flex;align-items:center;gap:12px;min-height:56px;padding:10px 0}
.material-list li+li{border-top:1px solid #f1efec}
.file-icon{width:29px;height:35px;display:grid;place-items:center;flex:none;border-radius:6px;background:#f3f4f7;color:var(--teal);font-size:17px}
.material-list .item-title{flex:1;min-width:0;color:var(--ink);text-decoration:none;font-weight:600;overflow-wrap:anywhere}
.material-list .item-title:hover{text-decoration:underline}
.material-list .download-link{color:var(--teal);font-size:13px;font-weight:800;text-decoration:none;white-space:nowrap}
.material-list .download-link:hover{text-decoration:underline}
.unavailable{font-size:12px;color:var(--muted)}
footer{text-align:center;color:var(--muted);font-size:12px;padding:20px 16px 26px}
footer a{font-weight:700;text-decoration:none}
@media(max-width:600px){.topbar{padding:18px 16px 6px}.brand{font-size:12px}.auth-card{padding:25px 21px;margin:20px auto 50px}.library{margin-top:25px}.download-all{display:block;padding:20px}.download-all a{display:block;margin-top:16px;text-align:center;white-space:normal}.material-section summary{padding:16px;font-size:16px}.material-list{padding:0 16px}.material-list li{flex-wrap:wrap;gap:9px}.material-list .download-link{margin-left:38px}}