:root{color:#111827;background:#f7f8fa;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(180deg,#fffffff5,#f7f8faf5),radial-gradient(circle at 16% 0%,rgba(230,235,244,.8),transparent 28%),radial-gradient(circle at 88% 12%,rgba(235,238,244,.78),transparent 30%)}button,input,textarea,select{font:inherit}button{border:1px solid #e5e7eb;border-radius:12px;background:#ffffffe0;color:#111827;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:38px;padding:8px 13px;box-shadow:0 1px 2px #0f172a0d;transition:background .14s ease,border-color .14s ease,box-shadow .14s ease,transform .14s ease}button:hover{background:#fff;border-color:#cbd5e1;box-shadow:0 8px 22px #0f172a14;transform:translateY(-1px)}button:disabled{cursor:not-allowed;opacity:.58;transform:none}textarea,input,select{border:1px solid #e5e7eb;border-radius:12px;background:#ffffffeb;color:#111827;outline:none;box-shadow:0 1px 2px #0f172a0a}textarea:focus,input:focus,select:focus{border-color:#9ca3af;box-shadow:0 0 0 4px #94a3b82e}textarea{min-height:118px;resize:vertical;padding:12px;line-height:1.55}select,input{min-height:40px;padding:0 12px}.center-screen,.login-screen{min-height:100vh;display:grid;place-items:center}.login-panel,.sidebar,.inspector,.topbar,.segment,.modal{border:1px solid rgba(229,231,235,.86);background:#ffffffbd;box-shadow:0 18px 55px #0f172a14;-webkit-backdrop-filter:blur(18px) saturate(150%);backdrop-filter:blur(18px) saturate(150%)}.login-panel{width:min(460px,calc(100vw - 32px));padding:30px;border-radius:24px;text-align:center}.brand-mark{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;margin:0 auto 14px;color:#111827;background:#fff;border:1px solid #e5e7eb}.primary-link{display:inline-flex;margin-top:12px;border-radius:12px;background:#111827;color:#fff;padding:11px 16px;text-decoration:none}.app-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr);gap:16px;padding:16px}.app-shell.practice-open{grid-template-columns:minmax(0,1fr) 340px}.sidebar,.inspector{border-radius:22px;padding:16px;max-height:calc(100vh - 32px);overflow:auto}.app-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.app-title span{display:block;font-size:22px;font-weight:760}.app-title small,.doc-item small,.feedback small,.muted{color:#6b7280}.icon-button{width:40px;min-width:40px;padding:0}.project-button{display:inline-flex}.topbar-left{display:flex;align-items:center;gap:8px}.topbar-left strong{font-size:17px;font-weight:760}.topbar-left small{color:#9ca3af}.active-soft{background:#f1f5f9;border-color:#cbd5e1;color:#0f172a}.import-button{width:100%;background:#111827;border-color:#111827;color:#fff;margin-bottom:16px}.doc-list{display:grid;gap:10px}.doc-item{display:grid;justify-content:stretch;text-align:left;gap:5px;border-radius:14px;padding:13px}.doc-item.active{border-color:#cbd5e1;background:#fff}.main-workspace{min-width:0;display:flex;flex-direction:column;min-height:calc(100vh - 32px)}.topbar{border-radius:18px;padding:10px 12px;display:flex;justify-content:center;gap:10px}.title-input{border:0;background:transparent;box-shadow:none;min-height:34px;padding:0;font-size:26px;font-weight:760;width:min(600px,44vw)}.status-line{min-height:22px;color:#6b7280;font-size:14px}.error-inline,.error{color:#b91c1c}.error-inline{margin-left:12px}.top-actions,.mode-strip,.practice-actions,.modal-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.pill-count{border-radius:999px;background:#f3f4f6;color:#4b5563;padding:2px 7px;font-size:12px}.rate-control{display:inline-flex;align-items:center;gap:8px;min-height:38px;border:1px solid #e5e7eb;border-radius:12px;background:#ffffffe0;padding:6px 10px;box-shadow:0 1px 2px #0f172a0d}.rate-control span{min-width:42px;font-size:13px;color:#4b5563;font-variant-numeric:tabular-nums}.rate-control input{width:94px;min-height:0;padding:0;box-shadow:none}.mode-strip{margin:0;padding:6px;border:1px solid #e5e7eb;border-radius:14px;background:#ffffffb3;width:fit-content}.mode-strip button{box-shadow:none;border-radius:10px;background:transparent}.mode-strip button.active{background:#111827;color:#fff;border-color:#111827}.segments{padding:16px 0 0;display:grid;gap:16px}.reader{padding:16px 0 92px;display:grid;gap:14px}.reader-hero{min-height:220px;border-radius:24px;padding:24px;color:#fff;background:linear-gradient(135deg,#577dc2eb,#97b2deeb),linear-gradient(180deg,#fff,#f3f6fb);box-shadow:0 18px 55px #3653862e;display:grid;align-content:space-between;overflow:hidden}.reader-hero-copy small{text-transform:uppercase;letter-spacing:.08em;opacity:.82;font-weight:720}.reader-hero h1{max-width:720px;margin:8px 0;font-size:38px;line-height:1.08}.reader-hero p{margin:0;color:#ffffffd1}.audio-summary{position:relative;display:inline-flex;align-items:center;gap:5px;margin-left:10px;padding:3px 10px;border-radius:999px;background:#fff3;font-size:12px;cursor:pointer;border:none;color:inherit;font-weight:560;transition:background .14s ease}.audio-summary>*{position:relative;z-index:1}.audio-summary:hover{background:#ffffff52}.audio-summary.generating{background:#f9a82540}.audio-summary.generating:before,.audio-summary.generating:after{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:999px}.audio-summary.generating:before{border:2px solid rgba(255,255,255,.28)}.audio-summary.generating:after{background:conic-gradient(from 0deg,#fff0,#fffffff2,#fff0 34%);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 2px));mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 2px));animation:spin .9s linear infinite}.reader-wave{height:46px;display:flex;align-items:center;gap:5px;opacity:.86}.reader-wave span{flex:1;min-width:3px;border-radius:999px;background:#ffffffd1}.reader-cards{display:grid;gap:10px}.reader-card{width:100%;display:grid;justify-content:stretch;text-align:left;gap:7px;padding:14px 15px;border-radius:14px;background:#ffffffdb;box-shadow:0 10px 30px #0f172a0d;position:relative}.reader-card-delete{position:absolute;top:8px;right:8px;z-index:2;opacity:0;pointer-events:none;transition:opacity .14s ease;width:32px;min-width:32px;min-height:32px;padding:0;border-radius:10px;color:#b91c1c;border-color:#fecaca;background:#fffffff0}.reader-card:hover .reader-card-delete{opacity:1;pointer-events:auto}.reader-card-delete:hover{background:#fef2f2}.reader-card:hover{transform:translateY(-1px)}.reader-card.active,.reader-card.playing{border-color:#bfd7f8;background:#f0f7ff;box-shadow:0 12px 36px #3969ab24}.reader-time{color:#5b8cc9;font-size:13px;font-weight:760;letter-spacing:.04em;font-variant-numeric:tabular-nums}.reader-sv{color:#0f172a;font-size:18px;line-height:1.5;font-weight:560}.reader-zh{color:#9ca3af;font-size:16px;line-height:1.45}.word-active{color:#db5a96;border-radius:6px;box-shadow:0 0 0 3px #f4a6cd2e;background:#f4a6cd1a}.reader-player{position:sticky;bottom:12px;z-index:4;border:1px solid rgba(229,231,235,.86);border-radius:20px;background:#ffffffdb;box-shadow:0 18px 45px #0f172a1f;-webkit-backdrop-filter:blur(18px) saturate(150%);backdrop-filter:blur(18px) saturate(150%);padding:12px;display:grid;gap:8px}.reader-tools{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px}.reader-tools .icon-button{width:36px;min-width:36px;min-height:36px}.reader-tool-button{min-height:36px;border-radius:11px;padding:7px 10px;gap:6px}.reader-tool-button strong{font-size:12px;font-variant-numeric:tabular-nums;color:#4b5563}.rate-control.compact{min-height:36px;border-radius:11px;padding:6px 9px}.rate-control.compact span{min-width:36px}.rate-control.compact input{width:76px}.speed-wrapper{position:relative}.speed-dropdown{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);background:#fff;border:1px solid #e5e7eb;border-radius:14px;box-shadow:0 12px 40px #0f172a24;padding:4px;display:grid;gap:1px;z-index:6;min-width:68px}.speed-dropdown button{width:100%;min-height:30px;border:none;box-shadow:none;border-radius:9px;padding:4px 10px;font-size:13px;font-variant-numeric:tabular-nums;justify-content:center}.speed-dropdown button.active{background:#111827;color:#fff}.underscore-text,.underscore-text *{color:transparent!important}.underscore-text span{border-bottom:2px solid #9ca3af}.underscore-text .word-active{box-shadow:none;background:transparent;border-radius:0;border-bottom-color:#db5a96!important;border-bottom-width:3px}.reader-tool-button.lang-toggle{min-height:36px;min-width:44px;padding:7px 9px;border-radius:11px;gap:5px;font-weight:670}.reader-progress{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;color:#6b7280;font-size:13px;font-variant-numeric:tabular-nums}.reader-progress input{width:100%;min-height:0;padding:0;box-shadow:none}.reader-progress-fill{height:4px;border-radius:999px;background:#2563eb;transition:width .16s ease}.reader-controls{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:10px}.reader-play{width:48px;min-width:48px;min-height:42px;padding:0;background:#111827;color:#fff;border-color:#111827}.reader-play:hover{background:#1f2937;border-color:#1f2937;color:#fff}.video-export-status{border-top:1px solid #e5e7eb;padding-top:8px;display:grid;gap:7px;color:#64748b;font-size:13px;text-align:center}.video-export-status.failed{color:#b91c1c}.video-export-status.completed{color:#047857}.video-export-links{display:flex;flex-wrap:wrap;justify-content:center;gap:7px}.video-export-links a{min-height:30px;display:inline-flex;align-items:center;gap:5px;border:1px solid #e5e7eb;border-radius:999px;padding:5px 10px;background:#fff;color:#0f172a;text-decoration:none}.practice-dock{border:1px solid rgba(229,231,235,.86);border-radius:20px;background:#ffffffc7;box-shadow:0 18px 55px #0f172a14;-webkit-backdrop-filter:blur(18px) saturate(150%);backdrop-filter:blur(18px) saturate(150%);padding:16px;display:grid;align-content:start;gap:12px;max-height:calc(100vh - 32px);overflow:auto}.practice-dock-header{display:flex;align-items:start;justify-content:space-between;gap:12px}.practice-dock-header h2{margin:0;font-size:18px}.practice-dock-header p{margin:4px 0 0;color:#6b7280;font-size:13px}.practice-play{justify-content:center}.practice-dock-input{min-height:220px}.segment{border-radius:22px;padding:16px}.segment.selected{border-color:#cbd5e1;box-shadow:0 0 0 4px #94a3b824,0 18px 55px #0f172a14}.segment-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.segment-head>span{color:#6b7280;font-weight:720}.segment-head div{display:flex;gap:7px}.segment-head button{width:36px;min-height:36px;padding:0}.audio-ready{background:#ecfdf5;border-color:#a7f3d0;color:#047857}.danger-icon{color:#b91c1c}.segment-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}.segment-grid.single-col{grid-template-columns:1fr}label{display:grid;gap:7px}label span,.inspector h2{font-weight:700}.hidden-panel{min-height:118px;border:1px dashed #d1d5db;border-radius:14px;display:grid;place-items:center;color:#6b7280;background:#f9fafbb8}.practice-box{margin-top:12px;display:grid;gap:9px}.practice-box textarea{min-height:100px}.diff-box{margin-top:12px;display:grid;gap:4px;padding:12px;border:1px solid #e5e7eb;border-radius:14px;background:#f9fafb;color:#374151}.inspector{display:grid;align-content:start;gap:18px}.inspector section{display:grid;gap:11px}.inspector h2{display:flex;align-items:center;gap:8px;margin:0 0 2px;font-size:17px}.small-textarea{min-height:88px}.feedback{display:grid;gap:8px}.feedback pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;border:1px solid #e5e7eb;border-radius:14px;background:#fff;padding:12px;max-height:360px;overflow:auto}.expression-list{display:grid;gap:9px;max-height:360px;overflow:auto}.expression{border:1px solid #e5e7eb;border-radius:14px;background:#fff;padding:11px;display:grid;gap:4px}.expression span{color:#4b5563}.expression small,.expression em{color:#6b7280}.danger{border-color:#fecaca;color:#b91c1c}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10;background:#0f172a47;display:grid;place-items:center;padding:20px}.modal{width:min(820px,100%);max-height:calc(100vh - 40px);overflow:auto;border-radius:22px;padding:22px;display:grid;gap:13px}.settings-modal{width:min(620px,100%)}.projects-modal{width:min(540px,100%)}.modal-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.modal h2,.modal p{margin:0}.modal p{color:#6b7280}.project-actions{display:flex;flex-wrap:wrap;gap:9px}.project-actions button{flex:1 1 170px}.project-list{display:grid;gap:9px;max-height:min(52vh,460px);overflow:auto;padding-right:2px}.project-item{display:grid;justify-content:stretch;text-align:left;gap:5px;border-radius:14px;padding:13px}.project-item.active{border-color:#cbd5e1;background:#fff}.project-item small{color:#6b7280}.modal textarea{min-height:420px}.settings-modal textarea{min-height:120px}.import-grid,.settings-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}.modal-actions{justify-content:flex-end}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:1120px){.app-shell{padding:12px}.app-shell.practice-open{grid-template-columns:minmax(0,1fr) 320px}}@media(max-width:780px){.app-shell{display:block;padding:10px}.app-shell.practice-open{display:block}.practice-dock{position:sticky;bottom:86px;z-index:5;width:100%;margin-top:12px;background:#fffffff0;box-shadow:0 18px 55px #0f172a29}.practice-dock-input{min-height:180px}.topbar,.segment,.reader-hero,.reader-player,.practice-dock{border-radius:18px;margin-bottom:12px;max-height:none}.topbar,.segment-grid,.import-grid,.settings-grid{display:grid;grid-template-columns:1fr}.title-input{width:100%}.top-actions{justify-content:flex-end}.modal{width:100%;max-height:calc(100dvh - 24px);padding:18px}.modal textarea{min-height:300px}.reader{padding-bottom:110px}.reader-hero{min-height:160px;padding:20px}.reader-hero h1{font-size:28px}.reader-sv{font-size:19px}.reader-zh{font-size:16px}.reader-player{bottom:8px}}