:root{--ink:#172033;--muted:#667085;--line:#dfe4ec;--paper:#fff;--bg:#f2f4f7;--blue:#165dff;--blue-dark:#0e46c7;--cyan:#eaf2ff;--green:#0c8a62;--red:#c73535;--shadow:0 20px 60px rgba(23,32,51,.09)}
*{box-sizing:border-box}html{font-family:Inter,"Noto Sans JP",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}body{margin:0;min-height:100vh;background:radial-gradient(circle at 5% 0%,#e5efff 0,transparent 34%),var(--bg)}a{color:inherit}.shell{min-height:100vh;display:flex;flex-direction:column}.topbar{height:76px;padding:0 clamp(20px,5vw,72px);display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.9);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:12px;font-size:14px;font-weight:800;letter-spacing:.12em;text-decoration:none}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--blue);color:#fff;letter-spacing:-.06em}.header-file{max-width:48%;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted)}.header-file span{font-weight:800;letter-spacing:.1em}.header-file strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink)}main{flex:1;width:min(1040px,calc(100% - 32px));margin:0 auto;padding:clamp(44px,8vw,92px) 0 64px}.eyebrow{margin:0 0 12px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.14em}.hero h1,.card h1{margin:0;font-size:clamp(34px,6vw,66px);line-height:1.08;letter-spacing:-.045em}.hero .lead{max-width:640px;margin:20px 0 34px;color:var(--muted);font-size:16px;line-height:1.9}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px}.card{background:var(--paper);border:1px solid rgba(223,228,236,.8);border-radius:24px;box-shadow:var(--shadow)}.upload-card{padding:28px}.dropzone{min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:34px;border:2px dashed #b8c4d8;border-radius:18px;background:#f9fbff;transition:.2s}.dropzone.is-dragging{border-color:var(--blue);background:var(--cyan);transform:scale(.995)}.upload-icon{width:58px;height:58px;display:grid;place-items:center;margin-bottom:18px;border-radius:18px;background:var(--blue);color:#fff;font-size:28px}.dropzone strong{font-size:20px}.dropzone p{margin:8px 0 18px;color:var(--muted);font-size:14px}.btn{appearance:none;border:0;border-radius:12px;padding:13px 20px;background:var(--blue);color:#fff;font:inherit;font-weight:750;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.18s}.btn:hover{background:var(--blue-dark);transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn.secondary{background:#eef2f7;color:var(--ink)}.btn.danger{background:var(--red)}.btn.large{width:100%;padding:17px 24px}.file-list{display:grid;gap:10px;margin-top:18px}.file-row{display:flex;align-items:center;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:13px;background:#fff}.file-type{width:38px;height:38px;display:grid;place-items:center;flex:none;border-radius:10px;background:var(--cyan);color:var(--blue);font-size:10px;font-weight:800}.file-info{min-width:0;flex:1}.file-info strong,.filename{display:block;overflow-wrap:anywhere}.file-info small{color:var(--muted)}.remove{border:0;background:transparent;color:var(--muted);font-size:22px;cursor:pointer}.settings{padding:24px}.settings h2{margin:0 0 18px;font-size:17px}.label{display:block;margin:18px 0 10px;font-size:12px;font-weight:800;letter-spacing:.08em}.expiry-options{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.expiry-options input{position:absolute;opacity:0}.expiry-options label{padding:11px 5px;border:1px solid var(--line);border-radius:10px;text-align:center;font-size:13px;font-weight:700;cursor:pointer}.expiry-options input:checked+label{border-color:var(--blue);background:var(--cyan);color:var(--blue)}.fineprint{margin:18px 0;color:var(--muted);font-size:12px;line-height:1.7}.progress-wrap{display:none;margin-top:18px}.progress-track{height:8px;overflow:hidden;border-radius:8px;background:#e8edf4}.progress-bar{width:0;height:100%;background:var(--blue);transition:width .15s}.progress-text{margin-top:7px;color:var(--muted);font-size:12px}.auth-card,.download-card,.result-card{width:min(560px,100%);margin:0 auto;padding:clamp(26px,5vw,48px)}.auth-card h1,.download-card h1{font-size:clamp(30px,7vw,52px)}.form-group{margin-top:20px}.form-group label{display:block;margin-bottom:8px;font-size:13px;font-weight:750}.input{width:100%;padding:14px 15px;border:1px solid #cfd6e2;border-radius:12px;background:#fff;font:inherit;outline:none}.input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(22,93,255,.1)}.alert{margin:18px 0;padding:13px 15px;border-radius:11px;background:#fff0f0;color:#9f2929;font-size:14px}.file-hero{margin:28px 0;padding:22px;border-radius:17px;background:#f7f9fc;border:1px solid var(--line)}.file-hero .filename{margin:7px 0;font-size:19px;font-weight:800}.meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:13px}.success-mark{width:62px;height:62px;display:grid;place-items:center;margin-bottom:20px;border-radius:50%;background:#e8f8f2;color:var(--green);font-size:28px}.share-result{margin-top:18px}.share-item{padding:18px;border:1px solid var(--line);border-radius:15px}.share-item+.share-item{margin-top:10px}.url-row{display:flex;gap:8px;margin-top:12px}.url-row .input{min-width:0;font-size:13px}.status-pill{display:inline-flex;padding:5px 9px;border-radius:999px;background:#e8f8f2;color:var(--green);font-size:11px;font-weight:800}.logout{display:inline-block;margin-top:14px;color:var(--muted);font-size:13px}footer{padding:28px 20px;text-align:center;color:#7c8799;font-size:11px;font-weight:700;letter-spacing:.08em}footer span{font-weight:500;letter-spacing:0}.hidden{display:none!important}
@media(max-width:760px){.topbar{height:68px;padding:0 16px}.brand>span:last-child{display:none}.header-file{max-width:70%}.workspace{grid-template-columns:1fr}.settings{order:-1}.hero h1{font-size:40px}.upload-card{padding:16px}.dropzone{min-height:220px;padding:22px 14px}.url-row{flex-direction:column}}