:root{color-scheme:dark;--font-ui:"Plus Jakarta Sans","Segoe UI",sans-serif;--bg-base:#0a0e13;--bg-deep:#05080c;--bg-panel:rgba(12,18,26,0.8);--bg-panel-strong:rgba(10,14,19,0.95);--bg-panel-soft:rgba(255,255,255,0.03);--bg-panel-lift:rgba(255,255,255,0.05);--line:rgba(255,255,255,0.08);--line-strong:rgba(255,255,255,0.12);--text:#fff;--text-soft:#d0d7dd;--text-muted:#8a96a2;--accent:#00a884;--accent-strong:#08a173;--accent-warm:#f68f48;--danger:#e53935;--success:#31a24c;--radius-xl:28px;--radius-lg:20px;--radius-md:16px;--radius-sm:12px;--shadow-xl:0 8px 16px rgba(0,0,0,0.3);--shadow-md:0 4px 8px rgba(0,0,0,0.2)}*,*::before,*::after{box-sizing:border-box}html,body{min-height:100%}html{background:linear-gradient(180deg,#0a0e13 0%,#05080c 100%)}body{margin:0;padding:0;overflow:auto;font-family:var(--font-ui);color:var(--text);background:transparent}body.menu-open{overflow:hidden}.backdrop{display:none}.backdrop-a,.backdrop-b,.backdrop-c,.backdrop-d{display:none}.screen{position:relative;z-index:1;width:100%;height:100vh;margin:0}.screen.hidden,.hidden{display:none !important}.auth-screen,.app-shell{height:100vh;min-height:100vh;border:none;border-radius:0;background:linear-gradient(180deg,rgba(15,20,28,1),rgba(10,14,19,1));backdrop-filter:none;box-shadow:none}.lang-switcher{position:fixed;top:18px;right:18px;z-index:15;display:inline-flex;align-items:center;gap:8px;padding:8px;border:1px solid var(--line);border-radius:999px;background:rgba(6,11,18,0.72);backdrop-filter:blur(14px)}.workspace-menu-overlay{position:fixed;inset:0;z-index:20;background:rgba(2,7,13,0.62);backdrop-filter:blur(10px)}.workspace-menu{position:fixed;top:calc(78px+env(safe-area-inset-top,0px));right:18px;z-index:21;width:min(420px,calc(100vw - 36px));padding:22px;border:1px solid var(--line);border-radius:28px;background:radial-gradient(circle at top right,rgba(102,230,215,0.12),transparent 28%),radial-gradient(circle at top left,rgba(255,183,102,0.09),transparent 24%),rgba(8,14,23,0.96);box-shadow:var(--shadow-xl)}.workspace-menu-head,.workspace-menu-profile,.mobile-topbar{display:flex;align-items:center}.workspace-menu-head{justify-content:space-between;gap:16px;margin-bottom:18px}.workspace-menu-profile{gap:14px;min-width:0}.workspace-menu-copy,.user-hub-copy{min-width:0;display:grid;gap:3px}.workspace-menu-copy strong,.user-hub-copy strong{font-size:0.96rem;line-height:1.2}.workspace-menu-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.workspace-menu-item,.user-hub-btn{border:1px solid var(--line);color:var(--text);font:inherit}.workspace-menu-item{min-height:54px;padding:14px 16px;border-radius:18px;background:rgba(255,255,255,0.05);cursor:pointer;transition:transform 150ms ease,border-color 150ms ease,background 150ms ease}.workspace-menu-item:hover,.user-hub-btn:hover{transform:translateY(-1px)}.workspace-menu-item-danger{border-color:rgba(255,109,140,0.28);background:rgba(255,109,140,0.12);color:#ffd9e2}.mobile-topbar{display:none;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(12,18,26,0.95);backdrop-filter:none;position:sticky;top:0;z-index:10}.user-hub-btn{min-width:0;display:inline-flex;align-items:center;gap:12px;padding:10px 12px;border-radius:18px;background:rgba(255,255,255,0.05);cursor:pointer;text-align:left;transition:transform 150ms ease,border-color 150ms ease,background 150ms ease}.desktop-user-hub{min-width:min(220px,100%);justify-content:flex-start}.mobile-user-hub{max-width:min(60vw,260px);margin-left:auto}.user-hub-copy small{color:var(--text-muted);font-size:0.76rem}.lang-btn,.auth-tab,.ghost-btn,.primary-btn,.compose-btn{border:0;outline:none;font:inherit}.lang-btn{min-height:38px;padding:8px 14px;border-radius:999px;background:transparent;color:var(--text-soft);cursor:pointer;transition:background 150ms ease,color 150ms ease,transform 150ms ease}.lang-btn.active{background:linear-gradient(135deg,rgba(102,230,215,0.98),rgba(63,180,255,0.92));color:#031018;font-weight:800}.lang-btn:hover,.auth-tab:hover,.ghost-btn:hover,.primary-btn:hover,.search-result:hover,.chat-item:hover,.settings-friend-row:hover,.compose-btn:hover{transform:translateY(-1px)}.auth-screen{display:grid;grid-template-columns:1fr minmax(380px,420px);overflow:hidden;isolation:isolate}.auth-hero{display:flex;flex-direction:column;justify-content:space-between;gap:28px;padding:44px;pointer-events:none;background:linear-gradient(180deg,rgba(15,20,28,0.5),rgba(10,14,19,0.5))}.brand-row{display:flex;align-items:center;gap:14px}.brand-row-hero{margin-bottom:18px}.brand-mark{width:56px;height:56px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;font-size:1.4rem;font-weight:900;box-shadow:0 4px 12px rgba(0,168,132,0.2)}.brand-mark-small{width:46px;height:46px;border-radius:14px;font-size:1.08rem}.brand-name{display:block;font-size:1.06rem;font-weight:800}.brand-tag{display:block;margin-top:2px;color:var(--text-muted);font-size:0.84rem}.eyebrow,.showcase-kicker,.settings-kicker{margin:0 0 12px;color:var(--accent);font-size:0.74rem;font-weight:700;letter-spacing:0.24em;text-transform:uppercase}.hero-shell h1{margin:0;max-width:9ch;font-size:clamp(3rem,5vw,5.2rem);line-height:0.92;letter-spacing:-0.08em}.hero-copy{max-width:58ch;margin:18px 0 0;color:var(--text-soft);font-size:1rem;line-height:1.8}.hero-stage{display:none}.hero-foot{display:none}.auth-card{position:relative;z-index:2;pointer-events:auto;display:flex;flex-direction:column;justify-content:center;padding:40px;background:rgba(12,18,26,0.95);border-left:1px solid var(--line)}.auth-switch{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:24px}.auth-tab{padding:14px 16px;border-radius:16px;background:rgba(255,255,255,0.05);color:var(--text-muted);cursor:pointer;transition:transform 150ms ease,background 150ms ease,color 150ms ease,box-shadow 150ms ease}.auth-tab.active{background:var(--accent);color:#fff;font-weight:600;box-shadow:0 4px 12px rgba(0,168,132,0.2)}.auth-form,.settings-card{display:grid;gap:16px}.field label{display:block;margin-bottom:8px;color:var(--text-soft);font-size:0.9rem;font-weight:600}.field input,.search-row input,.message-input{width:100%;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,0.045);color:var(--text);font:inherit;outline:none;transition:border-color 150ms ease,box-shadow 150ms ease,background 150ms ease}.field input,.search-row input{min-height:52px;padding:14px 16px}.message-input{min-height:56px;max-height:180px;padding:16px 18px;resize:none;line-height:1.55}.field input:focus,.search-row input:focus,.message-input:focus{border-color:rgba(102,230,215,0.52);background:rgba(255,255,255,0.06);box-shadow:0 0 0 4px rgba(102,230,215,0.12)}.primary-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;border-radius:8px;background:var(--accent);color:#fff;font-weight:600;cursor:pointer;box-shadow:0 2px 8px rgba(0,168,132,0.15);transition:transform 150ms ease,opacity 150ms ease,box-shadow 150ms ease}.auth-submit{width:100%}.ghost-btn,.compose-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 14px;border-radius:14px;background:rgba(255,255,255,0.05);color:var(--text);cursor:pointer;transition:transform 150ms ease,background 150ms ease,border-color 150ms ease}.ghost-btn-danger{background:rgba(255,109,140,0.1);color:#ffd8e1}.compose-btn{width:52px;min-width:52px;padding:0;border:1px solid var(--line);font-size:1.2rem}.send-btn{min-width:138px}button:disabled,input:disabled,textarea:disabled{opacity:0.54;cursor:not-allowed}.field-register-only,body[data-mode="login"] .field-register-only{display:none}body[data-mode="register"] .field-register-only{display:block}body[data-mode="register"] .auth-submit{background:linear-gradient(135deg,rgba(255,183,102,0.98),rgba(102,230,215,0.94))}.app-shell{display:grid;grid-template-columns:360px 1fr;overflow:hidden}.sidebar{position:relative;z-index:2;display:flex;flex-direction:column;gap:14px;min-height:0;overflow:hidden;padding:14px;border-right:1px solid var(--line);background:rgba(12,18,26,0.95)}.sidebar-top,.toolbar-actions,.chat-list-header,.chat-item-top,.chat-title,.chat-header,.chat-actions,.message-meta,.settings-header,.settings-friend-row,.avatar-upload-section{display:flex;align-items:center}.sidebar-top{justify-content:space-between;gap:16px;min-width:0}.toolbar-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;min-width:0}.toolbar-actions .ghost-btn{min-width:88px}.profile-card{display:flex;align-items:center;gap:14px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);background:radial-gradient(circle at top right,rgba(102,230,215,0.12),transparent 28%),linear-gradient(180deg,rgba(255,255,255,0.06),rgba(255,255,255,0.03));box-shadow:inset 0 1px 0 rgba(255,255,255,0.04)}.profile-copy{min-width:0;display:grid;gap:4px}.profile-copy strong{font-size:1rem}.sidebar-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.stat-card{padding:14px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,0.04)}.stat-card strong{display:block;font-size:1.12rem;font-weight:900}.search-panel{display:grid;gap:12px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);background:rgba(255,255,255,0.04)}.search-panel label{color:var(--text-muted);font-size:0.8rem;font-weight:700;letter-spacing:0.18em;text-transform:uppercase}.search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.search-results,.chat-list,.message-stream,.settings-panel,.settings-friends-list{overflow:auto;scrollbar-color:rgba(255,255,255,0.14) rgba(255,255,255,0.04)}.search-results{display:grid;gap:10px;max-height:220px}.search-result,.chat-item,.settings-friend-row{transition:transform 150ms ease,border-color 150ms ease,background 150ms ease}.search-result{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 14px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,0.04);text-align:left;cursor:pointer}.result-copy,.chat-item-main,.settings-friend-copy{min-width:0;display:grid;gap:4px}.pill,.status-pill,.status-badge,.username-chip,.badge{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:28px;padding:6px 10px;border-radius:999px;font-size:0.76rem;white-space:nowrap}.pill,.status-pill,.username-chip{background:rgba(255,255,255,0.05);color:var(--text-muted)}.pill-accent,.status-badge{background:rgba(102,230,215,0.11);color:var(--accent)}.badge{background:rgba(255,183,102,0.16);color:#ffe2bd}.chat-list-header{justify-content:space-between;gap:10px;color:var(--text-muted);font-size:0.78rem;font-weight:700;letter-spacing:0.18em;text-transform:uppercase}.chat-list{display:grid;gap:10px;min-height:0;flex:1;padding-right:4px}.chat-item{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,0.04);text-align:left;cursor:pointer}.chat-item.active{border-color:rgba(102,230,215,0.36);background:radial-gradient(circle at top right,rgba(102,230,215,0.14),transparent 42%),linear-gradient(180deg,rgba(255,255,255,0.06),rgba(255,255,255,0.035));box-shadow:inset 0 0 0 1px rgba(102,230,215,0.08)}.chat-item-top{justify-content:space-between;gap:10px}.chat-item p,.settings-friend-copy span{margin:0;font-size:0.88rem;line-height:1.45}.empty-chat-hint{padding:14px 16px;border:1px dashed rgba(255,255,255,0.14);border-radius:18px;background:rgba(255,255,255,0.025);line-height:1.6}.avatar{position:relative;display:grid;place-items:center;flex-shrink:0;border-radius:18px;background:linear-gradient(135deg,#7fe4e6,#4aa3ff);color:#031018;font-weight:900;letter-spacing:0.02em;box-shadow:0 14px 30px rgba(0,0,0,0.24);background-size:cover;background-position:center}.avatar::after{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(180deg,rgba(255,255,255,0.24),transparent 46%);pointer-events:none}.avatar-xl{width:54px;height:54px;font-size:1.18rem}.avatar-lg{width:60px;height:60px;font-size:1.32rem}.avatar-sm{width:44px;height:44px;border-radius:15px;font-size:0.96rem}.main-panel{position:relative;z-index:2;min-width:0;min-height:0;overflow:hidden;padding:12px;display:flex;flex-direction:column;background:rgba(15,20,28,0.95)}.empty-state,.chat-panel{flex:1;width:100%;min-height:0}.empty-state{display:grid;place-items:center}.empty-card{width:min(600px,100%);padding:44px 40px;border:1px solid var(--line);border-radius:30px;background:radial-gradient(circle at top right,rgba(102,230,215,0.1),transparent 32%),linear-gradient(180deg,rgba(255,255,255,0.06),rgba(255,255,255,0.03));box-shadow:var(--shadow-md);text-align:center}.empty-logo{width:84px;height:84px;margin:0 auto 18px;display:grid;place-items:center;border-radius:28px;background:linear-gradient(135deg,rgba(102,230,215,0.98),rgba(255,183,102,0.94));color:#031018;font-size:2rem;font-weight:900;box-shadow:0 18px 38px rgba(102,230,215,0.18)}.empty-card h2{margin:0 0 12px;font-size:clamp(2rem,4vw,2.9rem);letter-spacing:-0.05em}.chat-panel{display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:16px}.chat-header{justify-content:space-between;gap:20px;padding:22px 24px;border:1px solid var(--line);border-radius:28px;background:radial-gradient(circle at top right,rgba(63,180,255,0.09),transparent 24%),rgba(255,255,255,0.04);box-shadow:var(--shadow-md)}.chat-title{gap:16px;min-width:0}.chat-title-copy{min-width:0}.chat-title-copy h2{margin:0;font-size:1.34rem;letter-spacing:-0.03em}.chat-title-copy p{margin:4px 0 0;font-size:0.92rem}.chat-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px}.message-stream{min-height:0;padding:28px;border:1px solid var(--line);border-radius:30px;background:radial-gradient(circle at 18% 8%,rgba(102,230,215,0.07),transparent 22%),radial-gradient(circle at 82% 0%,rgba(255,183,102,0.06),transparent 18%),linear-gradient(180deg,rgba(255,255,255,0.045),rgba(255,255,255,0.02));box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:14px}.date-separator{align-self:center;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,0.06);color:var(--text-muted);font-size:0.74rem;font-weight:700;letter-spacing:0.12em;text-transform:uppercase}.message-row{display:flex;align-items:flex-end;gap:10px;max-width:100%}.message-row.mine{justify-content:flex-end}.message-bubble{width:fit-content;max-width:min(760px,78%);padding:12px 16px;border:none;border-radius:14px;background:rgba(50,60,75,0.8);box-shadow:0 1px 3px rgba(0,0,0,0.2);white-space:pre-wrap;overflow-wrap:anywhere;backdrop-filter:none;line-height:1.4}.message-row.mine .message-bubble{background:var(--accent);color:#fff;border-radius:14px;box-shadow:0 2px 4px rgba(0,168,132,0.3)}.message-meta{justify-content:space-between;gap:12px;margin-bottom:6px;font-size:0.75rem;display:flex;align-items:center}.message-meta strong{font-weight:600;font-size:0.85rem}.message-row.mine .message-meta strong{color:rgba(255,255,255,0.95)}.message-row.mine .message-meta span{color:rgba(255,255,255,0.8)}.message-compose{display:grid;grid-template-columns:auto auto 1fr auto;gap:10px;align-items:end;padding:12px 14px;border:none;border-radius:14px;background:rgba(25,32,45,0.9);box-shadow:0 1px 3px rgba(0,0,0,0.1);backdrop-filter:none}.message-compose .compose-btn,.message-compose .send-btn{align-self:stretch}.modal{position:fixed;inset:0;z-index:18;display:grid;place-items:center;padding:24px}.modal-overlay{position:absolute;inset:0;background:rgba(3,8,14,0.66);backdrop-filter:blur(10px)}.settings-panel{position:relative;z-index:1;width:min(1120px,100%);max-height:min(90vh,920px);padding:28px;border:1px solid var(--line);border-radius:30px;background:radial-gradient(circle at top right,rgba(102,230,215,0.08),transparent 24%),radial-gradient(circle at top left,rgba(255,183,102,0.08),transparent 20%),rgba(8,14,23,0.96);box-shadow:var(--shadow-xl)}.settings-header{justify-content:space-between;gap:18px;margin-bottom:22px}.settings-header h2,.card-head h3{margin:0;letter-spacing:-0.04em}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.settings-card{padding:20px;border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,0.04)}.settings-card-wide{grid-column:1 / -1}.avatar-upload-section{gap:20px;align-items:flex-start;padding:18px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,0.03)}.avatar-preview{width:112px;height:112px;border-radius:26px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(102,230,215,0.2),rgba(63,180,255,0.18));color:var(--text);font-size:2.4rem;font-weight:900;background-size:cover;background-position:center;border:1px solid rgba(102,230,215,0.3);flex-shrink:0}.avatar-upload-controls{flex:1;display:grid;gap:10px}.upload-btn{width:fit-content}.settings-friends-list{display:grid;gap:10px;max-height:340px}.settings-friend-row{justify-content:space-between;gap:14px;padding:12px 14px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,0.04)}.toast{position:fixed;left:50%;bottom:22px;z-index:24;max-width:min(780px,calc(100vw - 32px));padding:14px 18px;border:1px solid var(--line);border-radius:16px;background:rgba(6,11,18,0.94);color:var(--text);box-shadow:var(--shadow-md);text-align:center;transform:translate(-50%,18px);opacity:0;transition:transform 150ms ease,opacity 150ms ease}.toast.visible{transform:translate(-50%,0);opacity:1}.toast[data-kind="error"]{border-color:rgba(255,109,140,0.32)}.toast[data-kind="success"]{border-color:rgba(124,240,183,0.32)}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid rgba(102,230,215,0.5);outline-offset:2px}button,input,textarea{-webkit-tap-highlight-color:transparent}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:rgba(255,255,255,0.04);border-radius:999px}::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.14);border-radius:999px}::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,0.18)}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important}}