:root{--bg:#faf8f5;--surface:rgba(255,255,255,.82);--text:#3a3835;--soft:#6b6763;--dim:#a8a49e;--gold:#c47d00;--blue:#3d7899;--line:rgba(61,120,153,.13);--shadow:0 24px 70px rgba(61,82,72,.14)}
*{box-sizing:border-box}
html{min-height:100%;background:var(--bg)}
body{min-height:100vh;margin:0;color:var(--text);font-family:"DM Sans","PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at 10% 3%,rgba(164,211,221,.65),transparent 27rem),radial-gradient(circle at 92% 15%,rgba(244,208,144,.5),transparent 25rem),linear-gradient(155deg,#faf8f5,#edf3f0 58%,#f8f0e6)}
a,button,input{font:inherit}
.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{width:min(100%,460px);padding:34px;border:1px solid rgba(255,255,255,.9);border-radius:28px;background:var(--surface);box-shadow:var(--shadow);backdrop-filter:blur(24px)}
.back-link{display:inline-flex;margin-bottom:32px;color:var(--blue);font-size:12px;font-weight:700;text-decoration:none}
.eyebrow{color:var(--blue);font-size:10px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}
h1{margin:8px 0 12px;font-family:Georgia,"Songti SC",serif;font-size:clamp(38px,8vw,58px);font-weight:400;letter-spacing:-.04em}
.intro{margin:0;color:var(--soft);font-size:14px;line-height:1.65}
.login-form{display:grid;gap:10px;margin-top:28px}
.login-form label{color:var(--soft);font-size:12px;font-weight:700}
.login-form input{width:100%;height:52px;padding:0 15px;border:1px solid var(--line);border-radius:15px;outline:0;background:rgba(255,255,255,.8);color:var(--text);font-size:20px;letter-spacing:.15em}
.login-form input:focus{border-color:rgba(61,120,153,.55);box-shadow:0 0 0 4px rgba(61,120,153,.1)}
.login-form button,.open-document{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:14px;background:linear-gradient(145deg,#4f8cab,#28566f);color:#fff;font-weight:700;text-decoration:none;cursor:pointer}
.login-form button{height:50px;margin-top:4px}
.error{margin:0;padding:10px 12px;border-radius:12px;background:#f7e6e2;color:#8a4138;font-size:12px}
.privacy-note{margin:20px 0 0;color:var(--dim);font-size:11px;line-height:1.6}
.materials-shell{width:min(calc(100% - 36px),980px);margin:0 auto;padding:30px 0 60px}
.materials-header{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px;padding:28px;border:1px solid rgba(255,255,255,.9);border-radius:28px;background:var(--surface);box-shadow:var(--shadow);backdrop-filter:blur(24px)}
.materials-header .back-link{margin-bottom:26px}
.logout{border:0;padding:10px 14px;border-radius:999px;background:rgba(216,233,239,.82);color:#245870;font-size:12px;font-weight:700;cursor:pointer;white-space:nowrap}
.document-list{display:grid;gap:11px}
.document-card{display:grid;grid-template-columns:175px 1fr auto;gap:18px;align-items:center;padding:20px;border:1px solid rgba(255,255,255,.9);border-radius:20px;background:var(--surface);box-shadow:0 12px 35px rgba(61,82,72,.09);backdrop-filter:blur(18px)}
.document-date{color:var(--gold);font-size:11px;font-weight:700}
.document-copy span{display:block;color:var(--dim);font-size:10px;font-weight:700;letter-spacing:.05em}
.document-copy h2{margin:5px 0 0;font-size:16px}
.open-document{min-height:40px;padding:9px 13px;font-size:11px;white-space:nowrap}
.security-note{margin-top:14px;padding:18px 20px;border-radius:18px;background:rgba(253,243,224,.78);color:#73511f}
.security-note strong{font-size:13px}
.security-note p{margin:5px 0 0;font-size:11px;line-height:1.6}
@media(max-width:650px){.auth-shell{padding:14px}.auth-card{padding:25px 20px}.materials-shell{width:calc(100% - 20px);padding-top:10px}.materials-header{display:block;padding:22px 18px}.materials-header form{margin-top:18px}.document-card{grid-template-columns:1fr;gap:8px;padding:17px}.open-document{width:100%;margin-top:5px}.document-date{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}