:root { font-family: Inter, "Microsoft YaHei", sans-serif; color: #172033; background: #f4f7fb; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.hidden { display: none !important; }
.login-card { width: min(380px, calc(100% - 32px)); margin: 12vh auto; padding: 36px; border-radius: 18px; background: #fff; box-shadow: 0 18px 50px #1f3b6418; text-align: center; }
.logo { display: grid; place-items: center; width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 14px; color: #fff; background: #315efb; font-size: 28px; }
h1, h2, p { margin-top: 0; } h1 { margin-bottom: 8px; font-size: 24px; } h2 { font-size: 18px; } p { color: #718096; }
#login-form { display: grid; gap: 12px; margin-top: 24px; }
input[type=password] { width: 100%; padding: 12px 14px; border: 1px solid #d7dfec; border-radius: 9px; font: inherit; }
button, .upload-button { border: 0; border-radius: 8px; padding: 10px 16px; font: inherit; cursor: pointer; }
.primary, .upload-button { color: #fff; background: #315efb; } .secondary { color: #315efb; border: 1px solid #cbd7ee; background: #fff; }
.error { min-height: 20px; color: #c0392b; } .message { min-height: 22px; margin: 16px 0; } .success { color: #16834b; }
.file-view { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 60px; }
.topbar, .list-header, .upload-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topbar { margin-bottom: 28px; } .topbar p { margin-bottom: 0; }
.upload-card, .list-card { padding: 24px; border-radius: 14px; background: #fff; box-shadow: 0 8px 28px #1f3b640d; }
.upload-card { border: 1px dashed #b7c8eb; background: #f7faff; } .upload-copy p { margin-bottom: 0; font-size: 14px; }
.upload-button input { display: none; }
.list-card { margin-top: 20px; } .list-header { margin-bottom: 16px; } .list-header h2 { margin: 0; }
.file-list { border: 1px solid #e7ecf4; border-radius: 10px; overflow: hidden; }
.file-row { display: grid; grid-template-columns: minmax(280px, 1.8fr) .7fr 1.2fr .8fr; align-items: center; gap: 16px; padding: 15px 16px; border-top: 1px solid #edf1f6; }
.file-row:first-child { border-top: 0; } .file-name { display: flex; align-items: center; gap: 10px; min-width: 0; } .file-name strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-icon { display: grid; place-items: center; width: 28px; height: 32px; border-radius: 6px; color: #315efb; background: #eef4ff; }
.actions { display: flex; justify-content: flex-end; gap: 14px; } .download, .delete { padding: 0; border: 0; background: transparent; cursor: pointer; font: inherit; } .download { color: #315efb; } .delete { color: #c0392b; }
.empty { padding: 42px 0; color: #8a95a8; text-align: center; } @media (max-width: 700px) { .file-row { grid-template-columns: 1fr auto; } .file-row > span { display: none; } .actions { justify-content: flex-start; } .upload-card { align-items: flex-start; flex-direction: column; } }