:root{--ink:#283a31;--muted:#728278;--paper:#f7fbf7;--surface:#fffefa;--line:#dfece3;--green:#528b69;--green-dark:#326247;--green-soft:#e8f4ec;--sun-soft:#fff5d9;--danger:#b76460;--ease-out:cubic-bezier(.23,1,.32,1)}*{box-sizing:border-box}body{min-width:0;margin:0;background:linear-gradient(145deg,#f7fbf7,#fffdf6);color:var(--ink);font-family:"DM Sans","Noto Sans SC",sans-serif}.feynman-page{width:min(100%,860px);margin:0 auto;padding:46px max(18px,5vw) calc(62px + env(safe-area-inset-bottom))}.back{display:inline-flex;margin-bottom:34px;color:#4c8565;text-decoration:none;font-size:13px}.eyebrow{margin:0;color:#81988a;letter-spacing:.12em;font-size:10px;font-weight:700}.feynman-header{display:flex;justify-content:space-between;gap:20px;margin-bottom:30px}.feynman-header h1{margin:8px 0;font-size:clamp(40px,7vw,56px);letter-spacing:-.06em;line-height:1}.feynman-header>div>p:last-child{max-width:440px;margin:0;color:var(--muted);font-size:15px;line-height:1.65}.feynman-panel{border:1px solid var(--line);border-radius:22px;background:rgba(255,254,250,.88);box-shadow:0 16px 42px rgba(56,96,69,.06);padding:clamp(19px,4vw,30px)}.feynman-panel+.feynman-panel{margin-top:22px}.panel-heading,.history-heading,.preview-meta{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.panel-heading h2,.history-heading h2{margin:7px 0 0;font-size:clamp(21px,4vw,28px);letter-spacing:-.04em}.voice-mark{display:grid;flex:0 0 auto;place-items:center;width:46px;height:46px;border-radius:15px;background:var(--sun-soft);color:#b88542}.voice-mark .lucide{width:21px;height:21px}label{display:grid;gap:8px;margin-top:21px;color:#587064;font-size:13px;font-weight:700}label span{color:#b76460}input{width:100%;min-width:0;border:1px solid #d7e4dc;border-radius:12px;padding:13px 14px;background:#fff;color:var(--ink);font-family:inherit;font-size:16px;font-weight:400;line-height:1.2;outline:0;transition:border-color 160ms ease,box-shadow 160ms ease}input:focus{border-color:#78aa8c;box-shadow:0 0 0 3px rgba(116,167,135,.15)}.tag-field{display:flex;gap:8px}.tag-field button,.soft-button,.finish-button,.text-danger,.text-button{border:0;font:600 13px inherit;cursor:pointer}.tag-field button{flex:0 0 auto;border-radius:11px;background:var(--green-soft);color:#437c5e;padding:0 14px}.tag-list{display:flex;flex-wrap:wrap;gap:7px;min-height:0;margin-top:10px}.tag-chip{display:inline-flex;align-items:center;gap:5px;max-width:100%;border-radius:999px;background:#edf6ef;color:#49745a;padding:6px 9px;font-size:11px;font-weight:700;white-space:nowrap}.tag-chip button{display:grid;place-items:center;width:16px;height:16px;border:0;border-radius:50%;background:transparent;color:inherit;font:700 15px/1 inherit;cursor:pointer}.recording-status,.history-status{min-height:20px;margin:17px 0 0;color:var(--muted);font-size:13px;line-height:1.5}.recording-status.is-error,.history-status.is-error{color:#ae5c57}.recording-status.is-success{color:#3d8059}.recorder-ready{display:grid;justify-items:start;gap:12px;margin-top:22px}.recorder-ready small{color:#829087;font-size:12px}.record-primary,.finish-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;border:0;border-radius:14px;background:var(--green);color:#fff;padding:12px 17px;font:700 14px inherit;cursor:pointer;transition:transform 160ms var(--ease-out),background 160ms ease,opacity 160ms ease}.record-primary .lucide{width:19px;height:19px}.record-primary:disabled,.finish-button:disabled{opacity:.6;cursor:wait}.record-primary:active,.finish-button:active,.soft-button:active,.text-danger:active,.text-button:active{transform:scale(.97)}.recorder-active{margin-top:22px}.recording-clock{display:flex;align-items:center;gap:9px;padding:18px;border-radius:16px;background:#f2f8f3}.recording-clock i{width:9px;height:9px;border-radius:50%;background:#d97069}.recording-clock strong{font-variant-numeric:tabular-nums;font-size:28px;letter-spacing:-.04em}.recording-clock span{margin-left:auto;color:#688174;font-size:12px;font-weight:700}.recording-actions,.preview-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:13px}.soft-button,.text-danger,.text-button{min-height:42px;border-radius:12px;padding:10px 14px}.soft-button{background:var(--green-soft);color:#40795a}.text-danger{background:#fff1ef;color:var(--danger)}.text-button{background:transparent;color:#568667}.recorder-preview{margin-top:22px;padding:18px;border:1px solid #d9eadf;border-radius:17px;background:#fcfffb}.preview-meta strong,.preview-meta span{display:block}.preview-meta strong{margin-top:6px;font-size:16px}.preview-meta span{margin-top:5px;color:var(--muted);font-size:12px}.recorder-preview audio,.recording-card audio{width:100%;margin-top:15px}.history-heading>#history-count{margin-top:4px;border-radius:999px;background:var(--green-soft);color:#578368;padding:6px 9px;font-size:11px;font-weight:700}.tag-filter{display:flex;gap:8px;overflow-x:auto;margin:19px -2px 0;padding:2px;scrollbar-width:none}.tag-filter::-webkit-scrollbar{display:none}.filter-chip{flex:0 0 auto;border:1px solid #d8e7dd;border-radius:999px;background:#fff;color:#668071;padding:8px 11px;font:700 12px inherit;cursor:pointer;transition:background 160ms ease,color 160ms ease,border-color 160ms ease}.filter-chip.is-active{border-color:#69987a;background:var(--green);color:#fff}.recording-list{display:grid;gap:11px;margin-top:17px}.recording-card{padding:17px;border:1px solid #e0ebe3;border-radius:16px;background:#fff}.recording-card-head{display:flex;justify-content:space-between;gap:14px}.recording-card h3{min-width:0;margin:0;overflow:hidden;font-size:16px;text-overflow:ellipsis;white-space:nowrap}.recording-card time{display:block;margin-top:5px;color:#87958c;font-size:11px}.recording-card .tag-list{margin-top:10px}.recording-card-actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.recording-card-duration{color:#708078;font-size:12px;font-weight:700}.delete-recording{border:0;border-radius:9px;background:#fff3f1;color:#b8665e;padding:7px 9px;font:600 11px inherit;cursor:pointer}.empty-recordings{margin:0;padding:25px 4px;color:#7d8d83;font-size:13px;line-height:1.7;text-align:center}@media(hover:hover) and (pointer:fine){.record-primary:hover,.finish-button:hover{background:var(--green-dark)}.filter-chip:hover{border-color:#9ebba8}.delete-recording:hover{background:#ffe8e5}}@media(max-width:600px){.feynman-page{padding-top:30px}.back{margin-bottom:27px}.feynman-header{margin-bottom:23px}.feynman-panel{border-radius:18px}.panel-heading,.history-heading{gap:12px}.tag-field{align-items:stretch}.tag-field button{min-height:48px}.record-primary{width:100%}.preview-meta{gap:7px}.preview-meta .text-button{padding-inline:4px}.recording-card{padding:15px}.recording-card-head{display:block}.recording-card-duration{display:block;margin-top:9px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:0ms!important}}