:root{--navy:#071426;--panel:#0b1d35;--panel-2:#102642;--line:#1e3856;--green:#64ffda;--green-soft:rgba(100,255,218,.12);--text:#d8e3ff;--muted:#8292ad;--mono:"JetBrains Mono",monospace;--sans:"Inter",sans-serif}
*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100%}
body{background:var(--navy);color:var(--muted);font-family:var(--sans);overflow:hidden}
button,input,textarea,select{font:inherit}
button,a,select{outline:none}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--green);outline-offset:3px}
.hidden{display:none!important}
.ambient{position:fixed;border-radius:999px;filter:blur(100px);pointer-events:none;opacity:.12}.ambient-one{width:420px;height:420px;background:#00d4aa;left:-180px;top:-180px}.ambient-two{width:360px;height:360px;background:#1472ff;right:-140px;bottom:-160px}
.brand{display:inline-flex;align-items:center;gap:11px;color:var(--text);font-family:var(--mono);font-size:14px;text-decoration:none;font-weight:600}.brand span{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--green);border-radius:7px;color:var(--green)}

/* Login shell */
.login-shell{position:relative;z-index:1;min-height:100vh;display:grid;place-items:center;padding:24px}
.login-card{width:min(100%,430px);padding:38px;border:1px solid var(--line);border-radius:16px;background:rgba(11,29,53,.85);box-shadow:0 30px 90px rgba(0,0,0,.35);backdrop-filter:blur(18px)}
.login-icon{display:grid;place-items:center;width:68px;height:68px;margin:46px auto 22px;border:1px solid var(--green);border-radius:18px;color:var(--green);font-family:var(--mono);font-weight:700;box-shadow:0 0 35px rgba(100,255,218,.12)}
.eyebrow{color:var(--green);font:600 11px var(--mono);letter-spacing:.16em;text-align:center}.login-card h1{margin:10px 0 10px;color:var(--text);font-size:32px;text-align:center}.login-copy{text-align:center;font-size:14px;line-height:1.7;margin-bottom:30px}
.login-card label{display:block;color:#aebbd2;font:500 12px var(--mono);margin-bottom:9px}.password-wrap{position:relative}.password-wrap input{width:100%;height:51px;padding:0 74px 0 15px;border:1px solid var(--line);border-radius:8px;background:#07182c;color:var(--text)}.password-wrap input:focus{border-color:var(--green)}.show-password{position:absolute;right:7px;top:7px;height:37px;padding:0 10px;border:0;background:transparent;color:var(--green);font:500 11px var(--mono);cursor:pointer}
.form-error{min-height:28px;padding-top:7px;color:#ff8e9b;font-size:12px}.primary-button{width:100%;height:50px;border:1px solid var(--green);border-radius:8px;background:var(--green);color:#062016;font:600 13px var(--mono);cursor:pointer;transition:.2s}.primary-button:hover{box-shadow:0 0 28px rgba(100,255,218,.25);transform:translateY(-1px)}.primary-button:disabled{opacity:.6}.primary-button span{margin-left:8px}.back-link{display:block;margin-top:26px;color:var(--muted);font:12px var(--mono);text-align:center;text-decoration:none}.back-link:hover{color:var(--green)}

/* App shell */
.app-shell{position:relative;z-index:1;display:grid;grid-template-columns:280px 1fr;height:100vh}

/* Sidebar */
.sidebar{display:flex;flex-direction:column;padding:22px 16px;border-right:1px solid var(--line);background:rgba(7,20,38,.94)}
.sidebar-top{display:flex;align-items:center;justify-content:space-between;padding:0 4px 24px}
.new-chat{display:flex;align-items:center;gap:10px;width:100%;padding:13px 15px;border:1px solid var(--green);border-radius:8px;background:var(--green-soft);color:var(--green);font:500 12px var(--mono);cursor:pointer;transition:.2s}
.new-chat:hover{box-shadow:0 0 15px rgba(100,255,218,.2)}
.new-chat span{font-size:20px;line-height:0}
.history-label{margin:30px 12px 10px;color:#647692;font:10px var(--mono);letter-spacing:.15em}
.history-item{display:flex;align-items:center;gap:10px;width:100%;padding:12px;border:0;border-radius:7px;background:var(--panel);color:#b9c6dd;text-align:left;font-size:12px;cursor:pointer}
.history-icon{color:var(--green)}
.history-item span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-footer{margin-top:auto}

/* Sidebar model button */
.model-card-btn{display:flex;align-items:center;gap:11px;width:100%;margin-bottom:12px;padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:inherit;text-align:left;cursor:pointer;transition:.2s}
.model-card-btn:hover{border-color:var(--green);background:var(--panel-2)}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green);flex-shrink:0}
.model-card-btn div{display:flex;flex-direction:column;gap:3px;min-width:0;flex:1}
.model-card-btn small{color:var(--green);font:600 9px var(--mono);letter-spacing:.12em}
.model-card-btn strong{color:#c4d0e7;font:500 11px var(--mono);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.change-txt{color:var(--green);font:600 10px var(--mono);margin-left:auto;white-space:nowrap}
.logout-button{display:flex;justify-content:space-between;width:100%;padding:10px 12px;border:0;background:transparent;color:#74859f;font:11px var(--mono);cursor:pointer}
.logout-button:hover{color:var(--green)}

/* Chat main */
.chat-main{display:grid;grid-template-rows:66px 1fr auto;min-width:0;background:linear-gradient(145deg,rgba(16,38,66,.18),transparent 40%)}
.chat-header{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 24px;border-bottom:1px solid var(--line);background:rgba(7,20,38,.75);backdrop-filter:blur(12px)}
.chat-header-title{display:flex;align-items:center;gap:10px}
.chat-header-title strong{color:var(--text);font-size:14px;white-space:nowrap}
.chat-header-title span{display:inline-flex;align-items:center;font:10px var(--mono);color:#64ffda}
.chat-header-title i{display:inline-block;width:6px;height:6px;margin-right:5px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green)}

/* Header Model Picker Button */
.header-model-btn{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid rgba(100,255,218,.35);border-radius:20px;background:rgba(11,29,53,.8);color:var(--text);font:500 12px var(--mono);cursor:pointer;transition:.2s}
.header-model-btn:hover{border-color:var(--green);background:var(--green-soft);box-shadow:0 0 15px rgba(100,255,218,.15)}
.header-model-btn .tag{padding:2px 6px;border-radius:4px;background:rgba(100,255,218,.2);color:var(--green);font-size:9px;font-weight:700}
.header-model-btn .name{color:#e2e8f0;font-weight:600;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.header-model-btn .arrow{color:var(--green);font-size:10px}

.portfolio-link{color:#8ea0bb;font:11px var(--mono);text-decoration:none;white-space:nowrap}
.portfolio-link:hover{color:var(--green)}
.icon-button{border:0;background:transparent;color:var(--text);cursor:pointer}
.menu-button,.mobile-close{display:none}

/* Messages area */
.messages{overflow-y:auto;padding:42px max(28px,calc((100% - 850px)/2)) 22px;scrollbar-color:var(--line) transparent}
.welcome{max-width:780px;margin:5vh auto 0;text-align:center}
.ai-mark{position:relative;display:grid;place-items:center;width:74px;height:74px;margin:0 auto 20px;border:1px solid var(--green);border-radius:22px;color:var(--green);font:700 27px var(--mono);box-shadow:0 0 40px rgba(100,255,218,.1)}
.ai-mark span{position:absolute;right:-7px;bottom:-6px;padding:3px 5px;border-radius:4px;background:var(--green);color:#062016;font-size:8px;font-weight:700}
.welcome h1{margin:12px 0 10px;color:var(--text);font-size:clamp(27px,4vw,42px);letter-spacing:-.03em}
.welcome>p:not(.eyebrow){max-width:570px;margin:0 auto;line-height:1.7;font-size:14px}
.prompts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:38px}
.prompts button{display:flex;flex-direction:column;align-items:flex-start;min-height:126px;padding:17px;border:1px solid var(--line);border-radius:10px;background:rgba(11,29,53,.65);color:var(--muted);text-align:left;cursor:pointer;transition:.2s}
.prompts button:hover{border-color:rgba(100,255,218,.55);background:var(--green-soft);transform:translateY(-2px)}
.prompts button>span{color:var(--green);font:18px var(--mono)}
.prompts strong{margin:15px 0 5px;color:#cad6ec;font-size:12px}
.prompts small{font-size:10px;line-height:1.5}

.message-row{display:grid;grid-template-columns:34px minmax(0,1fr);gap:13px;max-width:850px;margin:0 auto 28px}
.message-avatar{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--green);font:600 11px var(--mono)}
.message-row.user .message-avatar{border-color:rgba(100,255,218,.45);background:var(--green-soft)}
.message-content{min-width:0}
.message-content strong{display:block;margin:5px 0 9px;color:#c9d6ec;font:600 11px var(--mono)}
.message-content .bubble{color:#aebbd0;font-size:14px;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere}
.message-row.user .bubble{color:#d1dcf0}
.thinking{display:inline-flex;gap:5px;padding-top:8px}
.thinking i{width:6px;height:6px;border-radius:50%;background:var(--green);animation:blink 1s infinite}
.thinking i:nth-child(2){animation-delay:.15s}
.thinking i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,70%,100%{opacity:.25;transform:translateY(0)}35%{opacity:1;transform:translateY(-3px)}}

/* Composer shell */
.composer-shell{padding:12px max(28px,calc((100% - 850px)/2)) 18px;background:linear-gradient(transparent,var(--navy) 24%)}
.composer-tools{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:10px}

/* Composer Model Switch Bar */
.composer-model-bar{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--muted);font:500 11px var(--mono);cursor:pointer;transition:.2s}
.composer-model-bar:hover{border-color:var(--green);background:var(--panel-2)}
.composer-model-bar .badge{padding:2px 7px;border-radius:4px;background:rgba(100,255,218,.15);border:1px solid rgba(100,255,218,.35);color:var(--green);font:700 9px var(--mono)}
.composer-model-bar .model-name{color:var(--text);font-weight:600}
.composer-model-bar .action-btn{color:var(--green);font-weight:600;display:inline-flex;align-items:center;gap:4px;margin-left:4px}
.model-hint{color:#647792;font-size:11px}

.attachment-list{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:9px}
.attachment-chip{display:flex;align-items:center;gap:8px;max-width:260px;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:#aebbd0;font:10px var(--mono)}
.attachment-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.attachment-chip small{color:#657994}
.attachment-chip button{border:0;background:none;color:#ff9ba6;cursor:pointer}

.composer{display:flex;align-items:flex-end;gap:10px;padding:10px;border:1px solid var(--line);border-radius:12px;background:var(--panel);box-shadow:0 14px 40px rgba(0,0,0,.2)}
.composer:focus-within{border-color:rgba(100,255,218,.65)}
.composer textarea{flex:1;max-height:180px;padding:8px 0;border:0;resize:none;background:transparent;color:var(--text);line-height:1.5;outline:0}
.composer textarea::placeholder{color:#64748d}
.composer button{flex:0 0 40px;height:40px;border:0;border-radius:8px;background:var(--green);color:#062016;font-size:22px;cursor:pointer}
.composer .attach-button{border:1px solid var(--line);background:#102642;color:var(--green)}
.composer button:disabled{background:#28445a;color:#6d8299;cursor:not-allowed}
.composer-shell>p{margin-top:9px;color:#53647e;font:9px var(--mono);text-align:center}

/* ========================================= */
/* Model Selection Modal */
/* ========================================= */
.modal-overlay{position:fixed;inset:0;z-index:9999;background:rgba(4,12,24,.82);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:16px;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-card{position:relative;width:min(100%,680px);max-height:88vh;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:16px;background:#091a30;box-shadow:0 30px 100px rgba(0,0,0,.6);overflow:hidden}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--line);background:#071629}
.modal-header h2{color:var(--text);font-size:18px;display:flex;align-items:center;gap:10px}
.modal-header h2 span.tag{padding:2px 7px;border-radius:4px;background:rgba(100,255,218,.15);border:1px solid rgba(100,255,218,.4);color:var(--green);font:700 10px var(--mono)}
.modal-close-btn{border:0;background:transparent;color:#7c8fa6;font-size:24px;line-height:1;cursor:pointer;padding:4px 8px;border-radius:6px}
.modal-close-btn:hover{color:#fff;background:rgba(255,255,255,.1)}

.modal-search-box{padding:16px 24px;border-bottom:1px solid var(--line);background:#08182d}
.search-wrapper{position:relative}
.search-wrapper input{width:100%;height:44px;padding:0 16px 0 40px;border:1px solid var(--line);border-radius:9px;background:#061324;color:var(--text);font-size:13px}
.search-wrapper input:focus{border-color:var(--green)}
.search-wrapper .search-icon{position:absolute;left:14px;top:13px;color:#5a6d88;font-size:14px}

.modal-body{flex:1;overflow-y:auto;padding:20px 24px;scrollbar-color:var(--line) transparent}
.modal-section-title{color:var(--green);font:600 11px var(--mono);letter-spacing:.12em;margin-bottom:12px;text-transform:uppercase}

.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px;margin-bottom:24px}
.model-item-card{display:flex;flex-direction:column;gap:6px;padding:14px;border:1px solid var(--line);border-radius:10px;background:var(--panel);text-align:left;cursor:pointer;transition:.2s;position:relative}
.model-item-card:hover{border-color:rgba(100,255,218,.6);background:var(--panel-2);transform:translateY(-2px)}
.model-item-card.active{border-color:var(--green);background:rgba(100,255,218,.08);box-shadow:0 0 20px rgba(100,255,218,.12)}
.model-item-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.model-item-card strong{color:var(--text);font-size:13px}
.model-item-card .provider-badge{padding:2px 6px;border-radius:4px;background:#132845;color:#8ba2c4;font:600 9px var(--mono)}
.model-item-card p{color:#7c90ad;font-size:11px;line-height:1.5}
.model-item-card .active-check{color:var(--green);font-size:14px;font-weight:700}

.all-models-list{display:flex;flex-direction:column;gap:6px}
.model-list-row{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);font:500 12px var(--mono);cursor:pointer;transition:.15s}
.model-list-row:hover{border-color:var(--green);background:var(--panel-2);color:var(--green)}
.model-list-row.active{border-color:var(--green);background:rgba(100,255,218,.1);color:var(--green)}

@media(max-width:760px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:fixed;inset:0 auto 0 0;z-index:20;width:min(86vw,300px);transform:translateX(-105%);transition:transform .25s;box-shadow:20px 0 60px rgba(0,0,0,.4)}
  .sidebar.open{transform:translateX(0)}
  .menu-button,.mobile-close{display:block}
  .chat-header{padding:0 14px}
  .header-model-btn .tag{display:none}
  .header-model-btn .name{max-width:110px}
  .messages{padding:24px 14px 12px}
  .welcome{margin-top:1vh}
  .prompts{grid-template-columns:1fr;margin-top:24px}
  .prompts button{min-height:92px}
  .composer-shell{padding:10px 12px 12px}
  .composer-tools{flex-direction:column;align-items:flex-start;gap:6px}
  .portfolio-link{display:none}
  .login-card{padding:28px 22px}
  .login-icon{margin-top:34px}
  .message-row{grid-template-columns:30px 1fr;gap:10px}
  .model-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}