:root{--bg: #f4f6f8;--text: #14202b;--hint: #5d6b78;--card: #ffffff;--line: #dde3e9;--accent: #0f766e;--accent-text: #ffffff;--danger: #b42318;--warn-bg: #fff3cd;--warn-text: #664d03;--radius: 16px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);color-scheme:light dark}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #0f1418;--text: #e8edf1;--hint: #93a1ad;--card: #182027;--line: #26323b;--accent: #2dd4bf;--accent-text: #04201c;--danger: #ff8a80;--warn-bg: #3a2f0b;--warn-text: #ffe69c}}:root[data-theme=dark]{--bg: #0f1418;--text: #e8edf1;--hint: #93a1ad;--card: #182027;--line: #26323b;--accent: #2dd4bf;--accent-text: #04201c;--danger: #ff8a80;--warn-bg: #3a2f0b;--warn-text: #ffe69c}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0}body{background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%}.app{min-height:100dvh;max-width:480px;margin:0 auto;padding:calc(20px + var(--safe-top)) 16px calc(24px + var(--safe-bottom));display:flex;flex-direction:column;gap:16px}h1{font-size:1.6rem;line-height:1.2;margin:0}h2{font-size:1.15rem;margin:0}p{margin:0}.hint{color:var(--hint);font-size:.94rem}.center{text-align:center}.grow{flex:1}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:12px}.banner{background:var(--warn-bg);color:var(--warn-text);border-radius:12px;padding:10px 14px;font-size:.9rem}.error{color:var(--danger);font-size:.94rem}.btn{appearance:none;border:0;border-radius:14px;min-height:52px;padding:0 20px;font:inherit;font-weight:600;background:var(--accent);color:var(--accent-text);cursor:pointer;text-align:center;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.btn:disabled{opacity:.45;cursor:default}.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--line)}.btn.danger{background:transparent;color:var(--danger);border:1px solid var(--danger)}.btn.link{background:transparent;color:var(--accent);min-height:44px;font-weight:500}.btn.block{width:100%}.check{display:flex;gap:12px;align-items:flex-start;cursor:pointer}.check input{appearance:none;flex:none;width:26px;height:26px;margin:0;border:2px solid var(--hint);border-radius:8px;display:grid;place-content:center;background:transparent}.check input:checked{background:var(--accent);border-color:var(--accent)}.check input:checked:after{content:"";width:7px;height:13px;border:solid var(--accent-text);border-width:0 3px 3px 0;transform:rotate(45deg) translate(-1px,-1px)}.check span{font-size:.96rem}.linkbtn{background:none;border:0;padding:0;font:inherit;color:var(--accent);text-decoration:underline;cursor:pointer}.code{font-size:2.6rem;font-weight:700;letter-spacing:.12em;text-align:center;font-variant-numeric:tabular-nums}.input{width:100%;min-height:56px;border-radius:14px;border:1px solid var(--line);background:var(--card);color:var(--text);font:inherit;font-size:1.6rem;letter-spacing:.2em;text-align:center;padding:0 12px}.steps{margin:0;padding-left:1.2rem;display:flex;flex-direction:column;gap:6px}.row{display:flex;gap:10px;flex-wrap:wrap}.row>.btn{flex:1 1 140px}.sheet-backdrop{position:fixed;inset:0;background:#00000080;display:flex;align-items:flex-end;justify-content:center;z-index:10}.sheet{background:var(--bg);width:100%;max-width:480px;max-height:88dvh;border-radius:20px 20px 0 0;display:flex;flex-direction:column;padding-bottom:var(--safe-bottom)}.sheet header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line)}.sheet header h2{font-size:1.05rem}.sheet .body{overflow:auto;padding:16px;font-size:.95rem}.sheet .body h1{font-size:1.2rem;margin-bottom:8px}.sheet .body h2{margin:16px 0 6px;font-size:1.02rem}.sheet .body p,.sheet .body ul{margin:0 0 8px}.sheet .body .draft{background:var(--warn-bg);color:var(--warn-text);padding:10px 12px;border-radius:10px}.spinner{width:36px;height:36px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--accent);animation:spin 1s linear infinite;margin:40px auto}@keyframes spin{to{transform:rotate(360deg)}}