:root{color-scheme:light;--bg: #f4f6f5;--surface: #ffffff;--ink: #1a2422;--ink-soft: #55625d;--ink-faint: #66736e;--border: #dde3e1;--border-strong: #84918c;--accent: #12766e;--accent-ink: #ffffff;--accent-soft: #e3f1ef;--danger: #b8451e;--radius: 10px;--shadow: 0 1px 2px rgba(20, 30, 28, .05)}:root[data-theme=dark]{--bg: #121816;--surface: #1a2422;--ink: #eef2f0;--ink-soft: #9fb0aa;--ink-faint: #728079;--border: #2d3a36;--accent: #4fd8c4;--accent-ink: #08211d;--accent-soft: #1c3532;--danger: #e08a63;--shadow: 0 1px 2px rgba(0, 0, 0, .3)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink);font-family:-apple-system,PingFang SC,Segoe UI,system-ui,sans-serif;line-height:1.55}.app{max-width:960px;margin:0 auto;padding:18px 24px 20px}.app-header{margin-bottom:12px}.brand{display:flex;align-items:baseline;gap:7px;margin-bottom:10px}.brand-icon{align-self:center;border-radius:7px}.brand-mark{font-weight:700;font-size:15px;letter-spacing:-.005em}.brand-sub{color:var(--ink-soft);font-size:12.5px}.app-header h1{font-size:22px;font-weight:700;letter-spacing:-.01em;line-height:1.25;margin:0 0 8px}.header-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px}.usage-hint{margin:0;color:var(--ink-soft);font-size:13.5px}.trust-badge{margin:0;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--accent);background:var(--accent-soft);padding:4px 10px;border-radius:999px}.workspace{display:flex;flex-direction:column;gap:20px}.input-col,.receive-col{display:flex;flex-direction:column;gap:8px;min-width:0}.step-header{margin:0;font-size:13.5px;font-weight:650;color:var(--accent)}.drop-zone-label{display:block;font-size:13px;font-weight:600;color:var(--ink-soft);cursor:text}.drop-zone{border:1.5px dashed var(--border-strong);border-radius:var(--radius);padding:14px;background:var(--surface);box-shadow:var(--shadow);transition:border-color .15s ease,box-shadow .15s ease}.drop-zone.drag-over,.drop-zone:focus-within{border-color:var(--accent);border-style:solid;box-shadow:0 0 0 3px var(--accent-soft)}.text-input{display:block;width:100%;min-height:100px;border:none;border-radius:6px;padding:12px;font:inherit;font-size:14.5px;resize:vertical;background:var(--surface);color:var(--ink);transition:min-height .15s ease,opacity .15s ease}.text-input:focus-visible{outline:none}.text-input.compact{min-height:40px;resize:none;opacity:.7}.text-input.compact:focus-visible{opacity:1}.image-preview{display:block;max-width:100%;max-height:200px;min-height:32px;min-width:32px;margin-top:10px;border-radius:6px;border:1px solid var(--border);object-fit:contain;background:repeating-conic-gradient(rgba(0,0,0,.04) 0% 25%,transparent 0% 50%) 50% / 16px 16px}.image-preview[hidden]{display:none}.file-preview{margin:10px 2px 0;font-size:13px;color:var(--ink-soft)}.input-actions{margin-top:10px;display:flex}.choose-image-btn{font:inherit;font-size:13px;font-weight:600;padding:7px 14px;min-height:36px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--ink);cursor:pointer;transition:border-color .12s ease,background-color .12s ease}.choose-image-btn:hover{border-color:var(--accent);color:var(--accent)}.status-line{margin:0 2px;font-size:13px;color:var(--ink-soft)}.status-line.error{color:var(--danger)}.receive-panel{position:relative;min-height:340px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.receive-placeholder{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--ink-faint)}.receive-placeholder svg{color:var(--accent);opacity:.55;margin-bottom:6px}.receive-placeholder p{margin:0;font-size:13px;max-width:240px}.receive-placeholder .get-app-label{font-weight:700;color:var(--ink);font-size:14px}.receive-placeholder .get-app-platform{color:var(--ink-soft);font-size:12px;margin-bottom:6px}.receive-panel:has(#player-area:not([hidden])) .receive-placeholder{display:none}.player-area{width:100%;text-align:center}.qr-canvas-frame{display:inline-block;border-radius:10px;background:#fff;padding:10px;line-height:0}.qr-canvas{max-width:100%;height:auto;image-rendering:pixelated;display:block}.qr-caption-row{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:8px}.zoom-qr-btn{position:relative;flex-shrink:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:var(--accent-soft);color:var(--accent);cursor:pointer;transition:background-color .12s ease,color .12s ease}.zoom-qr-btn:hover{background:var(--accent);color:var(--accent-ink)}.qr-zoom-modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center}.qr-zoom-modal[hidden]{display:none}.qr-zoom-backdrop{position:absolute;inset:0;background:#0009}.qr-zoom-content{position:relative;background:#fff;border-radius:14px;padding:24px;line-height:0}.qr-canvas-zoom{display:block;image-rendering:pixelated}.qr-zoom-close-btn{position:absolute;top:-14px;right:-14px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:var(--surface);color:var(--ink);box-shadow:0 2px 8px #00000040;cursor:pointer}.qr-caption{margin:0;font-size:13px;color:var(--ink-soft)}.single-frame-hint,.playing-status{margin:2px 0 0;font-size:12px;color:var(--ink-faint)}.playing-status{font-size:13px;color:var(--ink-soft)}.keyboard-hint{margin:0 0 10px;font-size:12px;color:var(--ink-faint)}.player-area.multi-frame .single-frame-hint,.player-area:not(.multi-frame) .playing-status,.player-area:not(.multi-frame) .player-controls,.player-area:not(.multi-frame) .advanced-panel{display:none}.player-controls{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:12px}.nav-btn{font:inherit;font-size:16px;width:40px;height:40px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--ink-soft);cursor:pointer;transition:border-color .12s ease,color .12s ease,transform .08s ease}.nav-btn:not(:disabled):hover{border-color:var(--accent);color:var(--accent)}.nav-btn:not(:disabled):active{transform:scale(.96)}.nav-btn:disabled{opacity:.4;cursor:default}.play-toggle{position:relative;display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 18px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-size:13.5px;font-weight:600;cursor:pointer}.play-toggle input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}.play-toggle:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}.play-toggle-icon{width:0;height:0;border-style:solid;border-width:5px 0 5px 8px;border-color:transparent transparent transparent currentColor}.play-toggle:has(input:checked) .play-toggle-icon{width:9px;height:10px;border-style:none;border-width:0;background:currentColor;box-shadow:4px 0 0 currentColor;margin-right:4px}.frame-info{display:flex;gap:10px;flex-wrap:wrap}.rounds-label{font-variant-numeric:tabular-nums;color:var(--ink-soft);font-size:12.5px}.player-controls-secondary{margin-top:6px}.player-controls-secondary .reset-btn{font:inherit;padding:8px 16px;min-height:40px;border-radius:8px;border:1px solid transparent;background:transparent;color:var(--ink-soft);cursor:pointer;font-size:13px;transition:border-color .12s ease,color .12s ease}.player-controls-secondary .reset-btn:hover{border-color:var(--border);color:var(--ink)}.advanced-panel{margin-top:8px;text-align:left;font-size:13px}.advanced-panel summary{cursor:pointer;color:var(--ink-soft);text-align:center}.advanced-body{margin-top:10px;display:flex;flex-direction:column;gap:8px}.frame-descriptor{font-variant-numeric:tabular-nums;color:var(--ink-faint);font-size:12px;font-family:ui-monospace,SF Mono,monospace}.fps-row{display:flex;align-items:center;gap:10px}.fps-row input[type=range]{flex:1;accent-color:var(--accent)}button:focus-visible,.drop-zone:focus-visible,.choose-image-btn:focus-visible,input[type=range]:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app-footer{margin-top:16px;text-align:center;font-size:12.5px}.app-footer a{color:var(--ink-soft);transition:color .12s ease}.app-footer a:hover{color:var(--accent)}#lang-switcher{margin-left:10px;font:inherit;font-size:12.5px;color:var(--ink-soft);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:4px 8px;min-height:30px;cursor:pointer}.info{margin-top:40px;display:grid;gap:28px;max-width:720px;margin-left:auto;margin-right:auto}.info-section h2{margin:0 0 10px;font-size:16px;font-weight:650}.info-section h3{margin:16px 0 4px;font-size:14px;font-weight:600}.info-section p,.info-list{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.65}.info-list{padding-left:1.3em}.info-list li+li{margin-top:6px}.lang-links{margin-top:14px;display:flex;flex-wrap:wrap;justify-content:center;gap:2px 14px;font-size:12px;line-height:1.7}.app-footer .lang-links a{color:var(--ink-faint);text-decoration:none}.app-footer .lang-links a:hover{color:var(--accent)}.app-footer .lang-links a[aria-current=page]{color:var(--ink-soft);font-weight:600}h1,.info-section h2,.info-section h3{text-wrap:balance}.info-section p,.info-list li,.usage-hint{text-wrap:pretty}#fps-value{font-variant-numeric:tabular-nums}.lang-more{margin-top:12px}.lang-more summary{display:inline-block;padding:6px 10px;cursor:pointer;font-size:12px;color:var(--ink-faint)}.lang-more[open] summary{color:var(--ink-soft)}.lang-more .lang-links{margin-top:6px}.lang-more .lang-links a{padding:3px 5px}@media(pointer:coarse){.choose-image-btn,.player-controls-secondary .reset-btn,.play-toggle{min-height:44px}#lang-switcher{height:44px}.nav-btn{width:44px;height:44px}.zoom-qr-btn:after{content:"";position:absolute;inset:-6px}.advanced-panel summary{display:flex;align-items:center;justify-content:center;min-height:44px}.app-footer>a{display:inline-flex;align-items:center;min-height:44px;padding:0 8px}.lang-more summary{min-height:44px;padding:12px 14px}.lang-more .lang-links a{display:inline-block;padding:12px 8px}}