@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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components;@layer utilities{.relative{position:relative}.static{position:static}.start{inset-inline-start:var(--spacing)}.hidden{display:none}.table{display:table}}:root{--ink:#172033;--muted:#697386;--line:#dfe5ed;--paper:#fff;--canvas:#eef2f6;--accent:#ff6b4a;--accent-dark:#e94f2d;--blue:#3778f0}*{box-sizing:border-box}html,body{background:var(--canvas);min-height:100%;color:var(--ink);margin:0}body{font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.38}.player-shell{background:var(--canvas);min-height:100vh;overflow:hidden}.topbar{border-bottom:1px solid var(--line);z-index:5;background:#fffffff5;justify-content:space-between;align-items:center;gap:18px;height:74px;padding:0 22px;display:flex;position:relative;box-shadow:0 1px #16203308}.brand-block,.top-actions{align-items:center;gap:14px;display:flex}.brand-block h1{letter-spacing:.02em;margin:2px 0 0;font-size:19px}.eyebrow{color:var(--accent-dark);letter-spacing:.12em;text-transform:uppercase;margin:0;font-size:11px;font-weight:800}.icon-button,.close-button{color:var(--ink);background:0 0;border:0}.icon-button{border:1px solid var(--line);border-radius:10px;width:40px;height:40px;font-size:20px}.close-button{width:30px;height:30px;color:var(--muted);font-size:22px}.ghost-button{border:1px solid var(--line);color:var(--ink);background:var(--paper);border-radius:9px;padding:9px 13px;font-weight:700}.ghost-button:hover,.icon-button:hover{background:#f7f9fb;border-color:#b8c2cf}.status{color:var(--muted);align-items:center;gap:7px;font-size:12px;display:inline-flex}.status i{background:#aab3c0;border-radius:50%;width:8px;height:8px}.status.connected{color:#1d7c55}.status.connected i{background:#27b174;box-shadow:0 0 0 4px #27b1741f}.auto-switch{color:#465166;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;font-size:13px;display:inline-flex}.auto-switch input{accent-color:var(--accent);width:17px;height:17px}.chapter-mode-status{color:#667085;background:#f0f3f7;border-radius:999px;align-items:center;gap:7px;padding:6px 10px;font-size:11px;font-weight:800;display:inline-flex}.chapter-mode-status:before{content:"";background:#a8b1bf;border-radius:50%;width:7px;height:7px}.chapter-mode-status.playing{color:#ad3b23;background:#fff0eb}.chapter-mode-status.playing:before{background:var(--accent);animation:1.4s infinite pending-pulse;box-shadow:0 0 0 4px #ff6b4a1f}.chapter-mode-status.paused{color:#946200;background:#fff8e8}.chapter-mode-status.paused:before{background:#e9a800}.workspace{grid-template-columns:0 minmax(0,1fr) 0;height:calc(100vh - 74px);transition:grid-template-columns .25s;display:grid}.workspace.with-sidebar{grid-template-columns:258px minmax(0,1fr) 0}.workspace.with-notes{grid-template-columns:0 minmax(0,1fr) 280px}.workspace.with-sidebar.with-notes{grid-template-columns:258px minmax(0,1fr) 280px}.chapter-panel,.notes-panel{background:var(--paper);min-width:0;overflow:hidden}.chapter-panel{border-right:1px solid var(--line)}.notes-panel{border-left:1px solid var(--line)}.panel-title{border-bottom:1px solid var(--line);white-space:nowrap;justify-content:space-between;align-items:center;height:58px;padding:0 17px;font-size:13px;font-weight:800;display:flex}.panel-title strong{color:var(--muted);font-size:11px;font-weight:600}.slide-list{height:calc(100% - 58px);padding:10px;overflow-y:auto}.slide-link{text-align:left;width:100%;color:var(--ink);background:0 0;border:0;border-radius:9px;grid-template-columns:34px 1fr;gap:10px;padding:10px 8px;display:grid}.slide-link:hover{background:#f3f6f9}.slide-link.active{color:#a9361e;background:#fff1ed}.slide-number{color:#9aa4b3;padding-top:2px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px}.slide-link.active .slide-number{color:var(--accent-dark)}.slide-link small,.slide-link 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12px}.stage-meta{margin-top:2px}.slide-frame{margin-top:4px}.transport{grid-template-columns:82px 1fr 82px;gap:7px;margin-top:10px}.transport button{font-size:12px}.chapter-player{grid-template-columns:1fr auto;gap:9px 12px;padding:9px 10px}.chapter-progress-area{grid-area:2/1/auto/-1}.chapter-player-actions{grid-area:1/2}.chapter-player-actions button{padding:8px 10px}.chapter-break{flex-direction:column;align-items:flex-start;gap:9px}.chapter-break>div:last-child{width:100%}.chapter-break button{flex:1}.floating-tools{bottom:12px;right:10px}.question-drawer{width:calc(100vw - 16px);top:72px;bottom:8px;right:8px}}@media (max-height:720px) and (min-width:761px){.topbar{height:62px}.workspace{height:calc(100vh - 62px)}.stage-area{padding-top:8px;padding-bottom:8px}.slide-frame,.stage-meta,.transport{width:min(100%,900px)}.notes-content{padding-top:18px}}