:root{--paper: #ece9e1;--ink: #211f1b;--ink-soft: #6b6659;--muted: #8a8475;--muted-2: #9a9384;--muted-3: #a8a292;--hint: #b4ad9c;--green: #5b8a64;--drop-border: #cfc6b2;--drop-bg: #faf8f2;--drop-bg-hover: #f3f6f0;--card-border: #cfcabd;--field-bg: #fbf9f3;--field-border: #ddd8ca;--disc-bg: #f4f1e9;--track: #e6e1d4;--sans: "Noto Sans JP", system-ui, sans-serif;--mono: "JetBrains Mono", ui-monospace, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{background:var(--paper);font-family:var(--sans);color:var(--ink)}.page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.shell{width:100%;max-width:540px}.drop{display:block;width:100%;cursor:pointer;text-align:center;padding:72px 28px;border:2px dashed var(--drop-border);border-radius:12px;background:var(--drop-bg);transition:background .12s,border-color .12s}.drop.is-hover{border-color:var(--green);background:var(--drop-bg-hover)}.drop.is-busy{cursor:wait;opacity:.7}.drop__arrow{font-size:26px;line-height:1;color:var(--hint);margin-bottom:16px}.drop__logo{font-family:var(--mono);font-size:24px;font-weight:500;letter-spacing:0}.drop__logo .dim{color:var(--hint)}.drop__hint{font-size:13px;color:var(--muted-2);margin-top:14px}.error{text-align:center;margin-top:16px;font-size:12px;color:#a3564b}.disc-toggle-row{text-align:center;margin-top:16px;font-size:11.5px;color:var(--muted-3);display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.disc-toggle{padding:0;font:inherit;color:var(--muted-3);text-decoration:underline;text-decoration-style:dotted;text-underline-offset:3px}.disc-box{display:none;max-width:420px;margin:14px auto 0;padding:14px 16px;background:var(--disc-bg);border:1px solid var(--field-border);border-radius:8px;font-size:11.5px;line-height:1.85;color:var(--muted)}.disc-box:target{display:block}.disc-box p{margin:0}.disc-box p+p{margin-top:6px}.card{background:#fff;border:1px solid var(--card-border);border-radius:14px;padding:26px}.url-row{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap}.url-field{flex:1;min-width:200px;font-family:var(--mono);font-size:15px;background:var(--field-bg);border:1px solid var(--field-border);border-radius:7px;padding:13px 14px;word-break:break-all;line-height:1.5;color:var(--ink);text-decoration:none}.url-field:hover{text-decoration:underline}.copy-btn{flex:none;border:none;cursor:pointer;font-family:inherit;font-size:14px;font-weight:500;padding:0 20px;border-radius:7px;background:var(--ink);color:#fff;min-height:48px;transition:background .12s}.copy-btn.is-copied{background:var(--green)}.countdown{margin-top:22px}.countdown__label{font-size:13px;color:var(--ink-soft);margin-bottom:8px}.countdown__num{font-family:var(--mono);font-size:16px;color:var(--ink);margin:0 3px}.countdown__track{height:5px;background:var(--track);border-radius:3px;overflow:hidden}.countdown__fill{height:100%;background:var(--green);border-radius:3px;transition:width .2s}.again-row{text-align:center;margin-top:16px}.again{background:none;border:none;color:var(--muted);font-size:13px;cursor:pointer;font-family:inherit;text-decoration:underline;text-underline-offset:3px}.visually-hidden{display:none}.view{min-height:100vh;display:flex;flex-direction:column;padding:16px}.view__frame{flex:1;width:100%;border:1px solid var(--card-border);border-radius:12px;background:#fff;min-height:70vh}.view__bar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:12px;font-size:12px;color:var(--muted)}.view__bar a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}.loading{margin:auto;color:var(--muted)}.notice{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.notice__box{max-width:420px;text-align:center}.notice__box h2{margin:0 0 10px;font-size:18px;font-weight:700}.notice__box p{margin:0;font-size:13px;line-height:1.8;color:var(--muted)}.notice__back{display:inline-block;margin-top:18px;font-size:13px;color:var(--green);text-decoration:underline;text-underline-offset:3px}