:root{--canvas: #ffffff;--canvas-soft: #fafafa;--canvas-soft-2: #f5f5f5;--ink: #171717;--on-ink: #ffffff;--body: #4d4d4d;--mute: #888888;--hairline: #ebebeb;--hairline-strong: #a1a1a1;--link: #0070f3;--link-deep: #0761d1;--link-bg-soft: #d3e5ff;--success: #0070f3;--error: #ee0000;--error-soft: #f7d4d6;--dot-waiting: #a1a1a1;--dot-connected: #0070f3;--dot-error: #ee0000;--progress-bg: #ebebeb;--progress-fill: #0070f3;--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-pill-sm: 64px;--radius-pill: 100px;--radius-full: 9999px;--space-xxs: 4px;--space-xs: 8px;--space-sm: 12px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 40px;--space-3xl: 48px;--space-4xl: 64px;--space-5xl: 96px;--space-6xl: 128px;--space-section: 192px;--elevation-1: 0 0 0 1px #00000014 inset;--elevation-2: 0px 1px 1px #00000005, 0px 2px 2px #0000000a, 0 0 0 1px #00000014 inset;--elevation-3: 0px 2px 2px #0000000a, 0px 8px 8px -8px #0000000a, 0 0 0 1px #00000014 inset;--elevation-4: 0px 2px 2px #0000000a, 0px 8px 16px -4px #0000000a, 0 0 0 1px #00000014 inset;--elevation-5: 0px 1px 1px #00000002, 0px 8px 16px -4px #0000000a, 0px 24px 32px -8px #0000000f, 0 0 0 1px #00000014 inset;--elevation-hover: 0px 8px 24px -8px #00000014, 0 0 0 1px #0000001a inset;--transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .15s ease, opacity .2s ease}[data-theme=dark]{--canvas: #0a0a0a;--canvas-soft: #111111;--canvas-soft-2: #1a1a1a;--ink: #ededed;--on-ink: #0a0a0a;--body: #888888;--mute: #555555;--hairline: #1f1f1f;--hairline-strong: #333333;--link: #3b82f6;--link-deep: #60a5fa;--link-bg-soft: #1e3a5f;--success: #3b82f6;--error: #ef4444;--dot-waiting: #555555;--dot-connected: #3b82f6;--dot-error: #ef4444;--progress-bg: #1f1f1f;--progress-fill: #3b82f6;--elevation-1: 0 0 0 1px #ffffff0a inset;--elevation-2: 0px 1px 1px #00000008, 0px 2px 2px #0000000f, 0 0 0 1px #ffffff0a inset;--elevation-3: 0px 2px 2px #0000000f, 0px 8px 8px -8px #00000014, 0 0 0 1px #ffffff0a inset;--elevation-4: 0px 2px 2px #0000000f, 0px 8px 16px -4px #00000014, 0 0 0 1px #ffffff0a inset;--elevation-5: 0px 1px 1px #0000000a, 0px 8px 16px -4px #0000001a, 0px 24px 32px -8px #00000024, 0 0 0 1px #ffffff0a inset;--elevation-hover: 0px 8px 24px -8px #00000024, 0 0 0 1px #ffffff14 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ease}.nav-logo:hover{opacity:.7}.nav-links{display:flex;align-items:center;gap:var(--space-xxs)}.nav-link{color:var(--body);text-decoration:none;font-size:14px;font-weight:400;line-height:20px;letter-spacing:-.28px;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);transition:var(--transition)}.nav-link:hover{color:var(--ink);background:var(--canvas);box-shadow:var(--elevation-2)}.nav-actions{display:flex;align-items:center;gap:var(--space-xs)}.menu-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;width:36px;height:36px;gap:5px;border:1px solid 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var(--hairline);border-radius:var(--radius-sm);background:transparent;color:var(--body);cursor:pointer;transition:var(--transition);flex-shrink:0;position:relative;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.theme-toggle:hover{border-color:var(--hairline-strong);color:var(--ink)}.theme-toggle:active{transform:scale(.92)}.theme-toggle svg{position:absolute;transition:opacity .2s ease,transform .25s ease}.theme-toggle .icon-sun{opacity:0;transform:rotate(90deg) scale(.8)}.theme-toggle .icon-moon,[data-theme=light] .theme-toggle .icon-sun,[data-theme=dark] .theme-toggle .icon-sun{opacity:1;transform:rotate(0) scale(1)}[data-theme=light] .theme-toggle .icon-moon,[data-theme=dark] .theme-toggle .icon-moon{opacity:0;transform:rotate(-90deg) scale(.8)}.hero-band{position:relative;background:var(--canvas);padding:var(--space-section) var(--space-lg) var(--space-5xl);text-align:center;overflow:hidden;transition:background-color .3s ease;display:flex;align-items:center;justify-content:center;min-height:min(100vh,800px)}.hero-mesh{position:absolute;top:-80px;right:-80px;bottom:-80px;left:-80px;z-index:0;opacity:.55;background:radial-gradient(ellipse 70% 50% at 5% 15%,#007cf0 0%,transparent 55%),radial-gradient(ellipse 60% 45% at 95% 10%,#00dfd8 0%,transparent 50%),radial-gradient(ellipse 55% 50% at 15% 75%,#7928ca 0%,transparent 50%),radial-gradient(ellipse 55% 45% at 80% 40%,#ff0080 0%,transparent 50%),radial-gradient(ellipse 50% 40% at 45% 85%,#ff4d4d 0%,transparent 40%),radial-gradient(ellipse 45% 40% at 55% 5%,#f9cb28 0%,transparent 40%);pointer-events:none;will-change:transform;animation:mesh-shift 25s ease-in-out infinite alternate}@keyframes mesh-shift{0%{transform:translate(0) scale(1)}33%{transform:translate(-12px,-6px) scale(1.03)}66%{transform:translate(8px,10px) scale(.97)}to{transform:translate(-6px,4px) scale(1.01)}}.hero-content{position:relative;z-index:1;max-width:700px;margin:0 auto}.hero-eyebrow{display:inline-block;font-family:var(--font-mono);font-size:12px;font-weight:400;line-height:16px;color:var(--mute);background:var(--canvas);padding:var(--space-xxs) var(--space-xs);border-radius:var(--radius-full);margin-bottom:var(--space-lg);text-transform:uppercase;letter-spacing:.04em;box-shadow:var(--elevation-1);border:1px solid var(--hairline)}.hero-headline{font-size:48px;font-weight:600;line-height:48px;letter-spacing:-2.4px;color:var(--ink);margin-bottom:var(--space-md);text-wrap:balance}.hero-body{font-size:18px;font-weight:400;line-height:28px;color:var(--body);max-width:560px;margin:0 auto 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var(--hairline)}.room-display{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);margin-bottom:var(--space-md)}.room-code{font-family:var(--font-mono);font-size:2.5rem;font-weight:500;letter-spacing:.15em;color:var(--ink);-webkit-user-select:all;user-select:all;background:var(--canvas);padding:var(--space-xs) var(--space-md);border-radius:var(--radius-sm);box-shadow:var(--elevation-1)}.room-code:hover{background:var(--canvas);box-shadow:var(--elevation-2)}.qr-container{display:flex;justify-content:center;margin-bottom:var(--space-xs)}.qr-container canvas{border-radius:var(--radius-sm);max-width:140px;height:auto}.drop-zone{border:2px dashed var(--hairline);border-radius:var(--radius-md);padding:var(--space-2xl) var(--space-lg) var(--space-xl);text-align:center;cursor:pointer;transition:var(--transition);background:var(--canvas);color:var(--body);position:relative;touch-action:manipulation}.drop-zone svg{margin-bottom:var(--space-sm);opacity:.4;transition:opacity .2s ease,transform .2s ease;color:var(--mute)}.drop-zone:before{content:"";position:absolute;top:-1px;right:-1px;bottom:-1px;left:-1px;border-radius:var(--radius-md);border:2px solid var(--link);opacity:0;transition:opacity .2s ease;pointer-events:none}.drop-zone:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:var(--radius-md);background:var(--link-bg-soft);opacity:0;transition:opacity .2s ease;pointer-events:none}.drop-zone>*{position:relative;z-index:1}.drop-zone:hover,.drop-zone.drag-over{border-color:transparent}.drop-zone:hover:before,.drop-zone.drag-over:before{opacity:1}.drop-zone:hover:after,.drop-zone.drag-over:after{opacity:.5}.drop-zone:hover svg,.drop-zone.drag-over svg{opacity:1;transform:translateY(-3px);color:var(--link)}.drop-text{font-size:15px;font-weight:500;color:var(--body)}.drop-zone:hover .drop-text,.drop-zone.drag-over 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file-enter{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.file-item-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-sm)}.file-name{font-size:14px;font-weight:500;line-height:20px;letter-spacing:-.28px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}.file-size{font-family:var(--font-mono);font-size:12px;line-height:16px;color:var(--mute);white-space:nowrap}.file-progress-bar{height:4px;background:var(--progress-bg);border-radius:2px;overflow:hidden}.file-progress-fill{height:100%;background:var(--progress-fill);border-radius:2px;transition:width .3s cubic-bezier(.4,0,.2,1);width:0%;position:relative}.file-progress-fill:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.25) 50%,transparent 100%);animation:shimmer 2s ease-in-out infinite}@keyframes 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var(--hairline);border-radius:var(--radius-sm);overflow:hidden;transition:var(--transition)}.faq-item:hover{border-color:var(--hairline-strong)}.faq-item[open]{box-shadow:var(--elevation-2);border-color:var(--hairline-strong)}.faq-item summary{padding:var(--space-md);font-weight:500;font-size:15px;line-height:24px;letter-spacing:-.28px;cursor:pointer;-webkit-user-select:none;user-select:none;list-style:none;display:flex;align-items:center;gap:var(--space-xs);transition:color .15s ease}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:before{content:"";display:inline-flex;width:20px;height:20px;background:var(--body);flex-shrink:0;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;transition:transform .2s ease}.faq-item[open] summary:before{transform:rotate(90deg)}.faq-item summary:hover{color:var(--link)}.faq-item .faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s cubic-bezier(.16,1,.3,1)}.faq-item[open] .faq-answer{grid-template-rows:1fr}.faq-item .faq-answer>div{overflow:hidden}.faq-item p{padding:0 var(--space-md) var(--space-md) calc(var(--space-md) + 28px);font-size:15px;line-height:24px;color:var(--body);max-width:60ch}.toast{position:fixed;top:80px;left:50%;transform:translate(-50%) translateY(-12px);z-index:200;padding:var(--space-xs) var(--space-md);background:var(--ink);color:var(--on-ink);border-radius:var(--radius-pill);font-size:14px;font-weight:500;line-height:20px;opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;white-space:nowrap}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.anim-fade-in,.anim-stagger{opacity:0;transform:translateY(24px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}.anim-fade-in.visible,.anim-stagger.visible{opacity:1;transform:translateY(0)}.anim-stagger{transition-delay:0s}.anim-stagger:nth-child(1).visible{transition-delay:.05s}.anim-stagger:nth-child(2).visible{transition-delay:.12s}.anim-stagger:nth-child(3).visible{transition-delay:.19s}.anim-stagger:nth-child(4).visible{transition-delay:.26s}.anim-stagger:nth-child(5).visible{transition-delay:.33s}@media(prefers-reduced-motion:reduce){.anim-fade-in,.anim-stagger{opacity:1;transform:none;transition:none}}.footer{background:var(--canvas);color:var(--body);padding:var(--space-3xl) var(--space-lg);border-top:1px solid var(--hairline);text-align:center;font-size:14px;line-height:20px;transition:var(--transition)}.footer p{color:var(--body)}@media(max-width:768px){.hero-band{padding:var(--space-5xl) var(--space-md) var(--space-3xl);min-height:auto}.hero-headline{font-size:32px;line-height:36px;letter-spacing:-1.28px}.hero-body{font-size:16px;line-height:24px}.hero-mesh{top:-40px;right:-40px;bottom:-40px;left:-40px}.section-band{padding:var(--space-4xl) var(--space-md)}.section-title{font-size:24px;line-height:32px;letter-spacing:-.96px}.card-grid{gap:var(--space-sm)}.card{padding:var(--space-lg)}.tool-panels{padding:var(--space-md)}.room-code{font-size:1.75rem}.room-section{padding:var(--space-md)}.nav-bar-inner{padding:0 var(--space-md)}.nav-links{gap:var(--space-xxs)}}@media(max-width:640px){.card-grid{grid-template-columns:1fr;max-width:400px}.hero-actions{flex-direction:column}.btn-primary,.btn-secondary{width:100%;max-width:260px}.room-code{font-size:1.5rem;letter-spacing:.12em}.drop-zone{padding:var(--space-xl) var(--space-md)}.hero-eyebrow{font-size:11px}.tool-tabs{gap:0}}@media(max-width:480px){.hero-band{padding:var(--space-4xl) var(--space-md) var(--space-2xl)}.hero-headline{font-size:24px;line-height:28px;letter-spacing:-.72px}.hero-body{font-size:15px;max-width:100%}.section-band{padding:var(--space-3xl) var(--space-md)}.section-header{margin-bottom:var(--space-xl)}.section-title{font-size:20px;line-height:28px;letter-spacing:-.6px}.connect-input-group{flex-direction:column}.nav-link:not(:first-child){display:none}.tab{font-size:13px;padding:0 var(--space-sm)}.tool-panels{padding:var(--space-sm)}.room-code{font-size:1.25rem}.drop-zone{padding:var(--space-lg) var(--space-sm)}.faq-item summary{padding:var(--space-sm) var(--space-md);font-size:14px}.faq-item p{font-size:14px;line-height:22px}.footer{padding:var(--space-2xl) var(--space-md)}}