:root,html[data-theme=dark]{color-scheme:dark;--bg: #0e1621;--bg-sidebar: #17212b;--bg-hover: #202b36;--bg-active: #2b5278;--bg-composer: #17212b;--bg-input: #242f3d;--bubble-mine: #2b5278;--bubble-theirs: #182533;--text: #f5f7fa;--text-muted: #7f8b99;--accent: #5288c1;--accent-strong: #64a9e8;--online: #4dcd5f;--danger: #e36d6d;--border: rgba(255, 255, 255, .06);--shadow: 0 18px 50px rgba(0, 0, 0, .45);--panel: rgba(23, 33, 43, .92);--chat-surface: #0b1622;--chat-pattern: url(/chat-pattern.svg);--chat-pattern-size: 220px 220px;--chat-glow-1: radial-gradient(ellipse 90% 55% at 8% -10%, rgba(82, 140, 196, .32), transparent 58%);--chat-glow-2: radial-gradient(ellipse 70% 50% at 100% 0%, rgba(126, 92, 176, .16), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(46, 128, 122, .22), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(43, 82, 120, .18), transparent 70%);--chat-base: linear-gradient(165deg, #0a141e 0%, #122433 48%, 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url(/chat-pattern-light.svg);--chat-pattern-size: 220px 220px;--chat-glow-1: radial-gradient(ellipse 90% 55% at 8% -10%, rgba(255, 255, 255, .55), transparent 58%);--chat-glow-2: radial-gradient(ellipse 70% 50% at 100% 0%, rgba(176, 154, 210, .2), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(120, 180, 168, .24), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(255, 255, 255, .22), transparent 70%);--chat-base: linear-gradient(165deg, #d5e3ee 0%, #c5d6e4 48%, #b8cddd 100%);--auth-wash: radial-gradient(ellipse 80% 60% at 20% 10%, rgba(82, 136, 193, .18), transparent 55%), radial-gradient(ellipse 70% 50% at 90% 90%, rgba(160, 190, 210, .28), transparent 50%), linear-gradient(160deg, #eef4f8 0%, #dce7f0 45%, #e8eef3 100%);--bubble-time: rgba(28, 39, 51, .45);--tick: rgba(28, 39, 51, .38);--tick-read: #4fa8de;--ok-bg: rgba(60, 193, 90, .14);--ok-fg: #237a3c;--backdrop: rgba(24, 40, 56, 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radial-gradient(ellipse 70% 50% at 100% 8%, rgba(70, 110, 150, .1), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(40, 90, 110, .14), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(43, 82, 120, .1), transparent 70%);--chat-base: linear-gradient(165deg, #0c1620 0%, #132230 48%, #0e1a26 100%)}html[data-theme=dark][data-chat-bg=dots],html[data-theme=dark] .wallpaper-swatch.bg-dots{--chat-surface: #0c1722;--chat-pattern: radial-gradient(circle, rgba(210, 224, 238, .16) 1.1px, transparent 1.2px);--chat-pattern-size: 22px 22px;--chat-glow-1: radial-gradient(ellipse 90% 55% at 8% -10%, rgba(82, 140, 196, .2), transparent 58%);--chat-glow-2: radial-gradient(ellipse 70% 50% at 100% 0%, rgba(90, 120, 160, .1), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(46, 110, 122, .14), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(43, 82, 120, .1), transparent 70%);--chat-base: linear-gradient(165deg, #0b151e 0%, #12202c 48%, #0d1a24 100%)}html[data-theme=dark][data-chat-bg=aurora],html[data-theme=dark] .wallpaper-swatch.bg-aurora{--chat-surface: #07141c;--chat-pattern: linear-gradient(transparent, transparent);--chat-pattern-size: auto;--chat-glow-1: radial-gradient(ellipse 90% 55% at 8% -10%, rgba(64, 210, 180, .3), transparent 58%);--chat-glow-2: radial-gradient(ellipse 70% 50% at 100% 0%, rgba(140, 90, 220, .28), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(40, 180, 160, .26), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(80, 120, 255, .16), transparent 70%);--chat-base: linear-gradient(165deg, #07141c 0%, #0e2430 48%, #0a1a22 100%)}html[data-theme=dark][data-chat-bg=sunset],html[data-theme=dark] .wallpaper-swatch.bg-sunset{--chat-surface: #1a1014;--chat-pattern: linear-gradient(transparent, transparent);--chat-pattern-size: auto;--chat-glow-1: 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radial-gradient(ellipse 50% 40% at 40% 70%, rgba(255, 255, 255, .22), transparent 70%);--chat-base: linear-gradient(165deg, #d5e3ee 0%, #c5d6e4 48%, #b8cddd 100%)}html[data-theme=light][data-chat-bg=plain],html[data-theme=light] .wallpaper-swatch.bg-plain{--chat-surface: #d2e0ea;--chat-pattern: linear-gradient(transparent, transparent);--chat-pattern-size: auto;--chat-glow-1: radial-gradient(ellipse 90% 55% at 12% -8%, rgba(255, 255, 255, .7), transparent 58%);--chat-glow-2: radial-gradient(ellipse 70% 50% at 100% 8%, rgba(160, 190, 210, .22), transparent 52%);--chat-glow-3: radial-gradient(ellipse 80% 60% at 90% 110%, rgba(140, 180, 190, .18), transparent 55%);--chat-glow-4: radial-gradient(ellipse 50% 40% at 40% 70%, rgba(255, 255, 255, .2), transparent 70%);--chat-base: linear-gradient(165deg, #dce8f0 0%, #d0dee8 48%, #c6d6e0 100%)}html[data-theme=light][data-chat-bg=dots],html[data-theme=light] .wallpaper-swatch.bg-dots{--chat-surface: #c9d8e4;--chat-pattern: 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#0006}.brand-logo.lg{width:96px;height:96px;border-radius:26px;margin-bottom:16px}.brand-logo img{width:100%;height:100%;display:block;object-fit:cover}.boot-sub{color:var(--text-muted);margin-top:8px}.auth-panel{width:min(420px,100%);background:var(--panel);border:1px solid var(--border);border-radius:22px;padding:28px 24px 24px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:rise .45s ease both}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.auth-brand{text-align:center;margin-bottom:22px}.auth-brand h1{margin:0;font-size:1.75rem}.auth-brand p{margin:8px 0 0;color:var(--text-muted);font-size:.95rem}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:4px;background:var(--bg-input);border-radius:12px;margin-bottom:18px}.auth-tabs button{padding:10px 12px;border-radius:10px;color:var(--text-muted);font-weight:600;transition:background .2s ease,color .2s ease}.auth-panel.wide{width:min(460px,100%)}.auth-tabs.three{grid-template-columns:1fr 1fr 1fr}.auth-tabs.four{grid-template-columns:repeat(4,1fr)}.auth-tabs.four button{padding:9px 4px;font-size:.78rem}.auth-tabs button.active{background:var(--bg-active);color:var(--text)}.qr-login{display:grid;gap:14px;justify-items:center;text-align:center}.qr-frame{width:236px;height:236px;padding:12px;border-radius:18px;background:#fff;display:grid;place-items:center;box-shadow:0 10px 30px #00000040}.qr-frame img{width:100%;height:100%;display:block}.qr-placeholder{color:#5b6b7a;font-weight:600;padding:16px}.qr-hint{margin:0;color:var(--text-muted);font-size:.92rem;line-height:1.45;max-width:34ch}.qr-confirm{text-align:center;gap:14px}.qr-confirm h2{margin:0}.qr-confirm p{margin:0;color:var(--text-muted)}.qr-confirm-actions{display:grid;grid-template-columns:1fr 1.4fr;gap:10px;align-items:center}.scanner-view{overflow:hidden;border-radius:14px;background:#000;min-height:240px}.scanner-view video{width:100%;height:100%;object-fit:cover;display:block}.auth-form{display:grid;gap:14px}.recover-steps{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:2px}.recover-steps span{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:.82rem;font-weight:700;color:var(--text-muted);background:var(--bg-input)}.recover-steps span.on{color:#fff;background:var(--accent)}.recover-steps span.done{color:var(--ok-fg);background:var(--ok-bg)}.recover-steps i{width:28px;height:2px;background:var(--border);display:block}.auth-form label{display:grid;gap:6px}.auth-form label span{font-size:.82rem;color:var(--text-muted);font-weight:600}.auth-form input,.search,.group-form input,.composer input,.photo-composer input{width:100%;border:1px solid transparent;background:var(--bg-input);border-radius:12px;padding:12px 14px;outline:none;font-size:16px;transition:border-color .2s ease,box-shadow .2s ease}.auth-form 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12px}.account-btn{display:flex;align-items:center;gap:12px;min-width:0;flex:1;text-align:left;border-radius:10px;padding:4px}.account-btn:hover{background:var(--bg-hover)}.app{position:fixed;top:0;right:0;bottom:0;left:0;width:100%;height:100%;min-height:0;display:grid;grid-template-columns:360px minmax(0,1fr);grid-template-rows:minmax(0,1fr);overflow:hidden;background:var(--bg)}.sidebar,.chat-view{min-width:0;min-height:0;height:100%;overflow:hidden}.sidebar{background:var(--bg-sidebar);border-right:1px solid var(--border);display:grid;grid-template-rows:auto auto auto minmax(0,1fr) auto}.sidebar-head,.chat-head,.sidebar-foot{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border)}.sidebar-head,.chat-head{padding-top:max(14px,env(safe-area-inset-top));padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}.chat-head{background:var(--panel);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);flex-shrink:0}.sidebar-foot{padding-bottom:max(14px,env(safe-area-inset-bottom));padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}.sidebar-foot{border-bottom:none;border-top:1px solid var(--border);padding-bottom:max(14px,env(safe-area-inset-bottom))}.sidebar-logo{font-size:1.2rem;font-weight:700}.sidebar-brand{display:flex;align-items:center;gap:2px;min-width:0}.settings-btn{flex-shrink:0;color:var(--text-muted)}.logout-btn{margin-top:8px;color:#e05c5c}.icon-btn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--text-muted);transition:background .15s ease,color .15s ease}.chat-head 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ease}.chat-item:hover,.user-item:hover{background:var(--bg-hover)}.chat-item.active{background:var(--bg-active)}.avatar{position:relative;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;font-weight:700;flex-shrink:0;color:#fff}.avatar.sm{width:40px;height:40px;font-size:.85rem}.avatar.lg{width:72px;height:72px;font-size:1.4rem}.avatar.has-photo{background:#2b5278;padding:0}.avatar img{width:100%;height:100%;object-fit:cover;display:block;border-radius:50%}.avatar-edit{padding:0;border:0;background:transparent;border-radius:50%;cursor:pointer}.avatar-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}.online-dot{position:absolute;right:1px;bottom:1px;width:11px;height:11px;border-radius:50%;background:var(--online);border:2px solid var(--bg-sidebar);z-index:1}.online-strip{padding:10px 12px 12px;border-bottom:1px solid 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infinite}.voice-btn.on{background:#e05c5c;color:#fff}.gallery-modal,.forward-modal{width:min(560px,100%);max-height:86vh;overflow:auto}.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:0 12px 12px}.gallery-tile{aspect-ratio:1;padding:0;overflow:hidden;background:#000}.gallery-tile img,.gallery-tile video{width:100%;height:100%;object-fit:cover}.gallery-files{display:grid;gap:8px;padding:0 16px 16px}.group-title-form{display:flex;gap:8px;width:min(320px,100%);margin-top:8px}.group-title-form input{flex:1}.group-member{display:flex;align-items:center;justify-content:space-between;gap:8px}.user-item-main{display:flex;align-items:center;gap:10px;min-width:0;flex:1;text-align:left}.admin-badge{margin-left:6px;font-size:.72rem;color:var(--accent);font-weight:700}.call-grid{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:4px;background:#000}.call-grid .call-remote{width:100%;height:100%;object-fit:cover}