/* ===== RESET ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#1a1917;--surf:#252320;--surf2:#2e2c29;--bdr:#3a3834;
  --acc:#c96b2e;--acc2:#e07d3c;
  --txt:#f0ede8;--txt2:#a09890;--txt3:#6b6560;
  --code:#111009;--usr:#2e2c29;--r:10px;
  --sb:260px;
}
html,body{height:100%;font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--txt);overflow:hidden;font-size:15px}
::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surf2);border-radius:2px}

/* ===== APP LAYOUT ===== */
.app-layout{display:flex;height:100vh;overflow:hidden}
.main-content{flex:1;display:flex;flex-direction:column;height:100vh;overflow:hidden;min-width:0}

/* ===== SIDEBAR ===== */
.sidebar{
  width:var(--sb);min-width:var(--sb);height:100vh;
  background:var(--surf);border-right:1px solid var(--bdr);
  display:flex;flex-direction:column;overflow:hidden;
  transition:transform .25s ease, width .25s ease;
  flex-shrink:0;
}
.sidebar.collapsed{width:0;min-width:0;border:none}

.sb-top{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 14px 12px;border-bottom:1px solid var(--bdr);flex-shrink:0;
}
.sb-logo{font-size:15px;font-weight:700;color:var(--txt);letter-spacing:-.2px}

/* OpenRouter auth */
.or-auth,.or-user{padding:12px 14px;border-bottom:1px solid var(--bdr);flex-shrink:0}
.or-login-btn{
  width:100%;display:flex;align-items:center;gap:8px;justify-content:center;
  padding:9px 12px;border-radius:8px;border:1px solid var(--bdr);
  background:rgba(201,107,46,.12);color:var(--acc2);font-size:13px;font-weight:500;
  cursor:pointer;font-family:inherit;transition:all .15s;
}
.or-login-btn:hover{background:rgba(201,107,46,.22);border-color:var(--acc)}
.or-login-btn{text-decoration:none}
.or-hint{font-size:11.5px;color:var(--txt3);margin-top:7px;line-height:1.5;text-align:center}
.or-key-row{display:flex;gap:5px;margin-top:7px}
.or-key-row input{
  flex:1;padding:6px 9px;background:var(--surf2);border:1px solid var(--bdr);
  border-radius:7px;color:var(--txt);font-size:12px;font-family:inherit;outline:none;min-width:0;
}
.or-key-row input:focus{border-color:var(--acc)}
.or-key-row button{
  padding:6px 11px;border-radius:7px;border:none;background:var(--acc);
  color:#fff;font-size:12px;font-weight:500;cursor:pointer;font-family:inherit;
  transition:all .15s;white-space:nowrap;
}
.or-key-row button:hover{background:var(--acc2)}
.or-user-row{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--txt2)}
.or-dot{width:7px;height:7px;border-radius:50%;background:#4ade80;flex-shrink:0}
.or-user-row span{flex:1}
.or-logout-btn{background:none;border:none;color:var(--txt3);cursor:pointer;padding:3px;border-radius:4px;display:flex;transition:all .15s}
.or-logout-btn:hover{color:var(--txt);background:var(--surf2)}

/* Chat history */
.sb-history-label{padding:10px 14px 5px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--txt3);flex-shrink:0}
.sb-history{flex:1;overflow-y:auto;padding:4px 8px}
.sb-empty{font-size:12.5px;color:var(--txt3);text-align:center;padding:20px 10px}
.chat-item{
  display:flex;align-items:center;gap:6px;padding:7px 8px;border-radius:8px;
  cursor:pointer;transition:all .15s;group:true;
}
.chat-item:hover{background:var(--surf2)}
.chat-item.active{background:rgba(201,107,46,.12);color:var(--acc2)}
.chat-item-title{flex:1;font-size:13px;color:var(--txt2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item.active .chat-item-title{color:var(--acc2)}
.chat-item-del{
  opacity:0;background:none;border:none;color:var(--txt3);
  cursor:pointer;padding:2px;border-radius:4px;font-size:13px;
  transition:all .15s;flex-shrink:0;
}
.chat-item:hover .chat-item-del{opacity:1}
.chat-item-del:hover{color:#e55;background:rgba(255,0,0,.1)}

.sb-bottom{padding:10px 10px 14px;border-top:1px solid var(--bdr);flex-shrink:0}
.sb-settings-btn{
  width:100%;display:flex;align-items:center;gap:8px;padding:8px 10px;
  border-radius:8px;border:none;background:transparent;color:var(--txt2);
  font-size:13px;cursor:pointer;font-family:inherit;transition:all .15s;
}
.sb-settings-btn:hover{background:var(--surf2);color:var(--txt)}

/* ===== TOP BAR ===== */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 18px;border-bottom:1px solid var(--bdr);flex-shrink:0;
}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:5px}

.icon-btn{
  width:30px;height:30px;border-radius:7px;border:none;
  background:transparent;color:var(--txt2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:all .15s;
}
.icon-btn:hover{background:var(--surf2);color:var(--txt)}

/* Model dropdown */
.model-wrap{position:relative}
.model-toggle{
  display:flex;align-items:center;gap:6px;padding:5px 10px;
  border-radius:8px;border:1px solid var(--bdr);background:var(--surf);
  color:var(--txt2);cursor:pointer;font-size:13px;font-family:inherit;transition:all .15s;
}
.model-toggle:hover{border-color:var(--acc);color:var(--txt)}
.model-dropdown{
  position:absolute;top:calc(100% + 6px);right:0;
  background:var(--surf);border:1px solid var(--bdr);border-radius:var(--r);
  padding:6px;min-width:220px;max-height:420px;overflow-y:auto;
  box-shadow:0 8px 24px rgba(0,0,0,.5);z-index:100;display:none;flex-direction:column;gap:1px;
}
.model-dropdown.open{display:flex}
.mg-label{
  font-size:11px;color:var(--txt3);padding:7px 8px 4px;
  font-weight:600;text-transform:uppercase;letter-spacing:.4px;
  border-top:1px solid var(--bdr);margin-top:3px;
}
.mg-label:first-child{border-top:none;margin-top:0}
.key-link{color:var(--acc2);text-decoration:none;font-weight:500}
.key-link:hover{text-decoration:underline}
.model-opt{
  text-align:left;padding:7px 10px;border-radius:6px;border:none;
  background:transparent;color:var(--txt2);font-size:13px;cursor:pointer;
  transition:all .15s;font-family:inherit;
}
.model-opt:hover{background:var(--surf2);color:var(--txt)}
.model-opt.active{color:var(--acc2);font-weight:500;background:rgba(201,107,46,.1)}
.model-opt.needs-key{opacity:.4;cursor:not-allowed}
.model-opt.needs-key.unlocked{opacity:1;cursor:pointer}

/* ===== CHAT AREA ===== */
.chat-area{flex:1;overflow-y:auto;padding:22px 20px 10px;display:flex;flex-direction:column;gap:3px}
.welcome{margin:auto;text-align:center;max-width:440px;padding:20px}
.welcome-title{font-size:22px;font-weight:600;margin-bottom:8px}
.welcome-sub{font-size:13px;color:var(--txt2);margin-bottom:20px;line-height:1.5}
.welcome-suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.suggestion{
  padding:7px 13px;border-radius:20px;border:1px solid var(--bdr);
  background:var(--surf);color:var(--txt2);font-size:13px;
  cursor:pointer;transition:all .15s;font-family:inherit;
}
.suggestion:hover{border-color:var(--acc);color:var(--txt)}

.msg{display:flex;flex-direction:column;animation:msgIn .2s ease;max-width:100%}
@keyframes msgIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
.msg.user{align-items:flex-end}.msg.assistant{align-items:flex-start}
.msg-bubble{
  max-width:86%;padding:10px 14px;border-radius:13px;
  line-height:1.65;font-size:14.5px;word-break:break-word;
}
.msg.user .msg-bubble{
  background:var(--usr);color:var(--txt);
  border-bottom-right-radius:4px;border:1px solid var(--bdr);
}
.msg.assistant .msg-bubble{background:transparent;color:var(--txt);padding:4px 2px;max-width:100%}
.msg.assistant .msg-bubble p{margin-bottom:7px}
.msg.assistant .msg-bubble p:last-child{margin-bottom:0}
.msg.assistant .msg-bubble h1,.msg.assistant .msg-bubble h2,.msg.assistant .msg-bubble h3{margin:12px 0 6px;font-weight:600}
.msg.assistant .msg-bubble ul,.msg.assistant .msg-bubble ol{padding-left:18px;margin-bottom:7px}
.msg.assistant .msg-bubble li{margin-bottom:3px}
.msg.assistant .msg-bubble a{color:var(--acc2)}
.msg.assistant .msg-bubble table{border-collapse:collapse;width:100%;margin-bottom:9px;font-size:13px}
.msg.assistant .msg-bubble th,.msg.assistant .msg-bubble td{border:1px solid var(--bdr);padding:6px 10px}
.msg.assistant .msg-bubble th{background:var(--surf);font-weight:600}
.msg.assistant .msg-bubble code:not([class]){
  background:var(--surf2);color:#e9957a;padding:2px 5px;border-radius:4px;
  font-family:'JetBrains Mono',monospace;font-size:12.5px;
}
.msg.assistant .msg-bubble pre{
  background:var(--code) !important;border:1px solid var(--bdr);
  border-radius:var(--r);overflow:hidden;margin:9px 0;
}
.code-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:7px 14px;border-bottom:1px solid var(--bdr);background:var(--surf);
}
.code-lang{font-size:11px;color:var(--txt2);font-family:'JetBrains Mono',monospace}
.copy-btn{
  font-size:11px;padding:2px 8px;border-radius:5px;border:1px solid var(--bdr);
  background:transparent;color:var(--txt2);cursor:pointer;font-family:inherit;transition:all .15s;
}
.copy-btn:hover{color:var(--txt);border-color:var(--acc)}
.msg.assistant .msg-bubble pre code{
  font-family:'JetBrains Mono',monospace;font-size:12.5px;
  background:transparent !important;padding:13px !important;display:block;line-height:1.6;overflow-x:auto;
}
.gen-image{max-width:100%;border-radius:var(--r);display:block;border:1px solid var(--bdr);margin-top:4px}
.img-generating{display:flex;align-items:center;gap:8px;padding:8px 0;color:var(--txt2);font-size:13px}
.dot-spin{display:flex;gap:4px}
.dot-spin span{width:5px;height:5px;border-radius:50%;background:var(--acc2);animation:blink 1.2s infinite}
.dot-spin span:nth-child(2){animation-delay:.2s}.dot-spin span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}
.img-actions{display:flex;gap:8px;margin-top:7px}
.img-dl-btn{
  font-size:12px;padding:5px 12px;border-radius:7px;border:1px solid var(--bdr);
  background:var(--surf);color:var(--txt2);cursor:pointer;font-family:inherit;transition:all .15s;text-decoration:none;
}
.img-dl-btn:hover{color:var(--txt);border-color:var(--acc)}
.typing{display:flex;align-items:center;gap:4px;padding:8px 0}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--txt3);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
.file-chip-msg{
  display:inline-flex;align-items:center;gap:5px;
  background:var(--surf);border:1px solid var(--bdr);
  border-radius:6px;padding:3px 9px;font-size:12px;color:var(--txt2);margin-bottom:5px;
}

/* ===== INPUT ZONE ===== */
.input-zone{flex-shrink:0;padding:7px 18px 15px;border-top:1px solid var(--bdr)}
.file-chips{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:6px}
.file-chip{
  display:flex;align-items:center;gap:5px;background:var(--surf);
  border:1px solid var(--bdr);border-radius:7px;padding:3px 10px;font-size:12px;color:var(--txt2);
}
.file-chip-name{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-chip-remove{background:none;border:none;color:var(--txt3);cursor:pointer;font-size:13px;padding:0;transition:color .15s}
.file-chip-remove:hover{color:#e55}
.input-bar{
  display:flex;align-items:flex-end;gap:7px;
  background:var(--surf);border:1px solid var(--bdr);
  border-radius:13px;padding:7px 7px 7px 10px;transition:border-color .15s;
}
.input-bar:focus-within{border-color:var(--acc)}
.attach-wrap{position:relative;align-self:flex-end}
.input-icon-btn{
  width:29px;height:29px;border-radius:7px;border:none;background:transparent;
  color:var(--txt3);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;
}
.input-icon-btn:hover{color:var(--txt);background:var(--surf2)}
.attach-menu{
  display:none;position:absolute;bottom:calc(100% + 6px);left:0;
  background:var(--surf);border:1px solid var(--bdr);border-radius:9px;
  padding:5px;min-width:130px;box-shadow:0 4px 16px rgba(0,0,0,.4);
  flex-direction:column;gap:2px;z-index:50;
}
.attach-menu.open{display:flex}
.attach-menu button{
  text-align:left;padding:7px 11px;border-radius:6px;border:none;
  background:transparent;color:var(--txt2);font-size:13px;cursor:pointer;
  font-family:inherit;transition:all .15s;
}
.attach-menu button:hover{background:var(--surf2);color:var(--txt)}
.input-txt{
  flex:1;background:transparent;border:none;outline:none;color:var(--txt);
  font-size:14px;font-family:inherit;resize:none;max-height:180px;line-height:1.55;padding:3px 0;
}
.input-txt::placeholder{color:var(--txt3)}
.send-btn{
  width:31px;height:31px;border-radius:9px;border:none;background:var(--acc);
  color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:all .15s;align-self:flex-end;
}
.send-btn:hover{background:var(--acc2)}.send-btn:disabled{opacity:.35;cursor:not-allowed}
.mode-bar{display:flex;align-items:center;gap:6px;margin-top:7px}
.mode-chip{
  padding:4px 12px;border-radius:20px;border:1px solid var(--bdr);
  background:transparent;color:var(--txt2);font-size:12px;cursor:pointer;font-family:inherit;transition:all .15s;
}
.mode-chip:hover{border-color:var(--acc);color:var(--txt)}
.mode-chip.active{background:var(--surf2);border-color:var(--acc);color:var(--acc2);font-weight:500}
.input-hint{font-size:11.5px;color:var(--txt3);margin-left:auto}

/* ===== SETTINGS ===== */
.settings-overlay{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);
  backdrop-filter:blur(4px);z-index:200;align-items:center;justify-content:center;
}
.settings-overlay.open{display:flex}
.settings-panel{
  background:var(--surf);border:1px solid var(--bdr);border-radius:14px;
  width:460px;max-width:calc(100vw - 32px);max-height:calc(100vh - 60px);
  overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.6);
}
.settings-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--bdr);
}
.settings-header h2{font-size:15px;font-weight:600}
.settings-body{padding:16px 20px;display:flex;flex-direction:column;gap:18px}
.key-section{display:flex;flex-direction:column;gap:8px}
.key-title{font-size:13.5px;font-weight:600;display:flex;align-items:center;gap:7px}
.badge{font-size:11px;padding:2px 7px;border-radius:20px;font-weight:600}
.badge.free{background:rgba(74,222,128,.12);color:#4ade80;border:1px solid rgba(74,222,128,.25)}
.badge.paid{background:rgba(201,107,46,.12);color:var(--acc2);border:1px solid rgba(201,107,46,.25)}
.key-desc{font-size:12px;color:var(--txt2);line-height:1.5}
.key-desc a{color:var(--acc2)}
.key-row{display:flex;gap:7px}
.key-row input{
  flex:1;padding:7px 11px;background:var(--surf2);border:1px solid var(--bdr);
  border-radius:8px;color:var(--txt);font-size:13px;font-family:inherit;outline:none;
}
.key-row input:focus{border-color:var(--acc)}
.key-row button{
  padding:7px 14px;border-radius:8px;border:none;background:var(--acc);
  color:#fff;font-size:13px;font-weight:500;cursor:pointer;font-family:inherit;transition:all .15s;white-space:nowrap;
}
.key-row button:hover{background:var(--acc2)}
.key-note{font-size:11.5px;color:var(--txt3);text-align:center;padding-top:8px;border-top:1px solid var(--bdr)}

/* ===== TOASTS ===== */
.toasts{position:fixed;bottom:18px;right:18px;display:flex;flex-direction:column;gap:6px;z-index:999}
.toast{
  display:flex;align-items:center;gap:8px;padding:10px 14px;
  background:var(--surf);border:1px solid var(--bdr);border-radius:8px;
  font-size:13px;box-shadow:0 4px 16px rgba(0,0,0,.4);animation:toastIn .2s ease;
}
@keyframes toastIn{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}
.toast.ok{border-color:#4a7c5a;color:#7eca99}
.toast.err{border-color:#7c3a3a;color:#e08080}

/* ===== RESPONSIVE ===== */
@media(max-width:640px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:150;transform:translateX(-100%)}
  .sidebar.mobile-open{transform:translateX(0)}
}