:root{--bg0: #07131a;--bg1: #0c1f28;--bg2: #12303c;--panel: rgba(12, 31, 40, .78);--panel-solid: #0e2430;--line: rgba(168, 214, 198, .14);--text: #e8f4ef;--muted: #8eada3;--accent: #d6a45a;--accent-2: #3ecfad;--danger: #ff7b72;--shadow: 0 24px 80px rgba(0, 0, 0, .45);--radius: 18px;--font: "Outfit", "Vazirmatn", system-ui, sans-serif;--mono: "JetBrains Mono", ui-monospace, monospace}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font);color:var(--text);background:radial-gradient(1200px 700px at 10% -10%,rgba(62,207,173,.18),transparent 55%),radial-gradient(900px 600px at 100% 0%,rgba(214,164,90,.16),transparent 50%),radial-gradient(800px 500px at 50% 120%,rgba(40,120,140,.25),transparent 60%),linear-gradient(165deg,var(--bg0),var(--bg1) 45%,#081820);background-attachment:fixed}body[dir=rtl]{font-family:Vazirmatn,Outfit,system-ui,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}::selection{background:#3ecfad59}.app-shell{min-height:100vh}.auth-page{min-height:100vh;display:grid;place-items:center;padding:32px 20px;position:relative;overflow:hidden}.auth-page:before{content:"";position:absolute;inset:-20% 20% auto;height:50%;background:radial-gradient(circle,rgba(62,207,173,.18),transparent 70%);animation:drift 12s ease-in-out infinite alternate;pointer-events:none}@keyframes drift{0%{transform:translate(-8%) scale(1)}to{transform:translate(10%) scale(1.08)}}.auth-card{width:min(440px,100%);background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:36px 32px;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow);animation:rise .7s ease both}@keyframes rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.brand-mark{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px}.brand-orb{width:34px;height:34px;border-radius:12px;background:linear-gradient(145deg,#3ecfadf2,#d6a45ad9);box-shadow:0 0 0 1px #ffffff1f,0 10px 30px #3ecfad40;animation:pulse 3.5s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.brand-mark strong{font-size:1.35rem;letter-spacing:.04em}.auth-card h1{margin:0 0 8px;font-size:clamp(1.6rem,3vw,2rem);font-weight:600;line-height:1.2}.auth-card p{margin:0 0 24px;color:var(--muted);line-height:1.55}.field{display:grid;gap:8px;margin-bottom:14px}.field label{font-size:.85rem;color:var(--muted)}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);background:#07131aa6;border-radius:14px;padding:12px 14px;outline:none;transition:border-color .2s ease,box-shadow .2s ease}.field input:focus,.field textarea:focus,.field select:focus{border-color:#3ecfad8c;box-shadow:0 0 0 3px #3ecfad1f}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:14px;padding:12px 16px;font-weight:600;transition:transform .15s ease,background .2s ease,border-color .2s ease,opacity .2s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{width:100%;background:linear-gradient(135deg,#3ecfad,#2aa889 40%,#d6a45a);color:#062018;margin-top:8px}.btn-primary:hover:not(:disabled){transform:translateY(-1px)}.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}.btn-ghost:hover:not(:disabled){border-color:#3ecfad66;background:#3ecfad0f}.btn-danger{background:#ff7b721f;border-color:#ff7b7247;color:#ffb4ae}.auth-switch{margin-top:18px;text-align:center;color:var(--muted);font-size:.92rem}.auth-switch button{background:none;border:none;color:var(--accent-2);font-weight:600;padding:0 4px}.lang-toggle{position:absolute;top:20px;inset-inline-end:20px;display:flex;gap:6px;z-index:2}.lang-toggle button{border:1px solid var(--line);background:#07131a8c;border-radius:999px;padding:8px 12px;font-size:.82rem}.lang-toggle button.active{border-color:#d6a45a8c;background:#d6a45a24}.error-banner{background:#ff7b721f;border:1px solid rgba(255,123,114,.28);color:#ffc2bd;border-radius:12px;padding:10px 12px;margin-bottom:14px;font-size:.9rem}.chat-layout{display:grid;grid-template-columns:280px minmax(0,1fr) 320px;min-height:100vh;gap:0}.sidebar,.settings-panel{background:#08141bb8;border-inline-end:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);display:flex;flex-direction:column;min-height:100vh;max-height:100vh}.settings-panel{border-inline-end:none;border-inline-start:1px solid var(--line)}.sidebar-head,.panel-head,.chat-top{padding:18px 18px 12px;display:flex;align-items:center;justify-content:space-between;gap:10px}.sidebar-head .brand-mark{margin:0}.sidebar-actions{padding:0 16px 12px;display:grid;gap:8px}.history-list{overflow:auto;padding:8px;display:grid;gap:6px;flex:1}.history-item{border:1px solid transparent;background:transparent;border-radius:14px;padding:12px;text-align:start;display:grid;gap:4px;transition:background .2s ease,border-color .2s ease}.history-item:hover{background:#3ecfad0f}.history-item.active{background:#3ecfad1a;border-color:#3ecfad47}.history-item strong{font-size:.92rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-item span{font-size:.75rem;color:var(--muted);font-family:var(--mono)}.sidebar-foot{padding:12px 16px 18px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}.user-chip{display:grid;gap:2px;min-width:0}.user-chip strong{font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-chip span{font-size:.75rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-main{display:grid;grid-template-rows:auto 1fr auto;min-height:100vh;max-height:100vh}.chat-top{border-bottom:1px solid var(--line);background:#07131a59}.model-select{display:flex;align-items:center;gap:10px;min-width:0;flex:1}.model-select select{max-width:min(420px,55vw);border:1px solid var(--line);background:#07131aa6;border-radius:12px;padding:10px 12px}.messages{overflow:auto;padding:28px 24px 12px;display:flex;flex-direction:column;gap:16px}.message{max-width:min(760px,100%);padding:14px 16px;border-radius:18px;border:1px solid var(--line);line-height:1.6;white-space:pre-wrap;word-break:break-word;animation:rise .35s ease both}.message.user{align-self:flex-end;background:linear-gradient(160deg,#d6a45a29,#d6a45a0d);border-color:#d6a45a47}.message.assistant{align-self:flex-start;background:#3ecfad12;border-color:#3ecfad33}.message .meta{display:flex;gap:8px;align-items:center;margin-bottom:8px;font-size:.75rem;color:var(--muted);font-family:var(--mono)}.empty-state{margin:auto;text-align:center;max-width:460px;padding:40px 20px;animation:rise .6s ease both}.empty-state h2{margin:0 0 10px;font-size:1.7rem}.empty-state p{margin:0;color:var(--muted);line-height:1.6}.composer{padding:16px 20px 22px;border-top:1px solid var(--line);background:#07131a73}.composer-box{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end;max-width:900px;margin:0 auto;border:1px solid var(--line);background:#081820d9;border-radius:20px;padding:12px;box-shadow:var(--shadow)}.composer-box textarea{resize:none;min-height:56px;max-height:180px;border:none;outline:none;background:transparent;padding:8px;line-height:1.45}.panel-body{padding:0 16px 18px;overflow:auto;display:grid;gap:12px;flex:1}.slider-row{display:grid;gap:8px}.slider-row header{display:flex;justify-content:space-between;gap:8px;font-size:.85rem;color:var(--muted)}.slider-row input[type=range]{width:100%;accent-color:var(--accent-2)}.pill-row{display:flex;flex-wrap:wrap;gap:6px}.pill{font-size:.72rem;border-radius:999px;padding:4px 8px;border:1px solid var(--line);color:var(--muted);background:transparent;cursor:pointer}.pill.free{color:#8dffd4;border-color:#3ecfad59;background:#3ecfad14}.pill.paid{color:#ffd39a;border-color:#d6a45a59;background:#d6a45a14}.model-card{border:1px solid var(--line);border-radius:16px;padding:12px;background:#07131a66;display:grid;gap:8px;cursor:pointer;text-align:start;transition:border-color .2s ease,transform .15s ease}.model-card:hover{border-color:#3ecfad59}.model-card.active{border-color:#3ecfad8c;box-shadow:inset 0 0 0 1px #3ecfad33}.model-card h3{margin:0;font-size:.95rem}.model-card p{margin:0;color:var(--muted);font-size:.8rem;line-height:1.45}.search-input{margin-bottom:4px}.mobile-bar{display:none}@media(max-width:1100px){.chat-layout{grid-template-columns:240px minmax(0,1fr)}.settings-panel{display:none}.settings-panel.open{display:flex;position:fixed;inset:0 auto 0 0;width:min(360px,92vw);z-index:30;box-shadow:var(--shadow)}.mobile-bar{display:flex;gap:8px}}@media(max-width:820px){.chat-layout{grid-template-columns:1fr}.sidebar{display:none}.sidebar.open{display:flex;position:fixed;inset:0 auto 0 0;width:min(320px,90vw);z-index:30;box-shadow:var(--shadow)}.messages{padding:18px 14px}}