:root{
  /* koyu tema (varsayılan değerler) */
  --bg:#0c0e13; --bg1:#12141b; --bg2:#171a22; --bg3:#1e222c; --line:#262b36; --line2:#2f3542;
  --tx:#e9ecf2; --tx2:#9aa3b4; --tx3:#6b7488;
  --acc:#6d8bff; --acc2:#9a7dff; --accSoft:#6d8bff22;
  --user:#1c2740; --ok:#34d399; --err:#f47272;
  --ubub:linear-gradient(135deg,var(--acc),var(--acc2)); --ubub-tx:#fff; --ubub-line:transparent;
  --abub:var(--bg2); --abub-line:var(--line);
  --logo-filter:brightness(0) invert(1) opacity(.92);   /* yatay logo koyu metinli → koyu temada beyaz siluet */
  --wm-filter:brightness(0) invert(1);                   /* filigran koyu temada beyaz */
  --shadow:0 6px 24px rgba(0,0,0,.25);
  --r:14px;
}
:root[data-theme="light"]{
  /* açık tema — premium his (ekran görüntüsündeki gibi) */
  --bg:#eef1f5; --bg1:#ffffff; --bg2:#f3f5f8; --bg3:#eef1f5; --line:#e3e7ee; --line2:#d4dae3;
  --tx:#1b2230; --tx2:#5c6675; --tx3:#97a0b0;
  --acc:#4f6ef0; --acc2:#7c5cff; --accSoft:#4f6ef014;
  --user:#dcf5e7; --ok:#1aa66b; --err:#e0556a;
  --ubub:#d8f3e4; --ubub-tx:#163a2a; --ubub-line:#bce8d1;
  --abub:#ffffff; --abub-line:#e6eaf1;
  --logo-filter:none;        /* açık temada logo olduğu gibi (lacivert metin okunur) */
  --wm-filter:none;
  --shadow:0 8px 30px rgba(40,60,120,.10);
}
*{box-sizing:border-box}
html{transition:background .25s ease}
body,#sidebar,#topbar,.msg .body,textarea,input,select,dialog,#composer-inner{transition:background .25s ease,color .25s ease,border-color .25s ease}
html,body{margin:0;height:100%;background:var(--bg);color:var(--tx);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;font-size:15px}
button{font:inherit;cursor:pointer;border:none;border-radius:10px;color:inherit}
textarea,input,select{font:inherit;color:var(--tx);background:var(--bg3);border:1px solid var(--line);border-radius:10px;padding:10px}
textarea:focus,input:focus,select:focus{outline:none;border-color:var(--acc)}
.ghost{background:transparent;color:var(--tx2)}
.ghost:hover{color:var(--tx)}
.hidden{display:none!important}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#2a2f3b;border-radius:8px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#39404f}
:root[data-theme="light"] ::-webkit-scrollbar-thumb{background:#cdd4de;border-color:#eef1f5}
:root[data-theme="light"] ::-webkit-scrollbar-thumb:hover{background:#b6bfcd}

/* login */
.login-body{display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1000px 500px at 50% -10%,#1a2236,#0c0e13)}
:root[data-theme="light"] .login-body{background:radial-gradient(1100px 560px at 50% -12%,#e7eefc,#eef1f5)}
:root[data-theme="light"] .login-card{box-shadow:0 20px 60px rgba(40,60,120,.14)}
.login-card{background:var(--bg1);border:1px solid var(--line);border-radius:20px;padding:36px;width:360px;
  display:flex;flex-direction:column;gap:14px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.login-img{width:88px;height:88px;object-fit:contain;margin:0 auto -2px;
  filter:drop-shadow(0 6px 18px rgba(109,139,255,.28))}
.login-logo{font-size:34px;font-weight:800;text-align:center;letter-spacing:-.5px;
  background:linear-gradient(95deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.login-sub{text-align:center;color:var(--tx2);margin-top:-6px;font-size:13px}
.login-card label{display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--tx2)}
.login-card input{padding:12px}
.login-card button[type=submit]{background:linear-gradient(95deg,var(--acc),var(--acc2));color:#fff;padding:13px;font-weight:600;margin-top:6px}
.login-card button[type=submit]:hover{filter:brightness(1.07)}
.login-error{background:#3a1d24;color:var(--err);padding:10px;border-radius:10px;font-size:13px;text-align:center}
.login-info{background:#13301f;color:#5fe0a8;padding:10px;border-radius:10px;font-size:13px;text-align:center}
.login-foot{text-align:center;font-size:13px;color:var(--tx2);margin-top:4px}
.login-foot a{color:var(--acc);text-decoration:none;font-weight:600}
.login-foot a:hover{text-decoration:underline}

/* layout */
#app{display:flex;height:100vh;overflow:hidden}
#sidebar{width:264px;background:var(--bg1);border-right:1px solid var(--line);display:flex;flex-direction:column;flex-shrink:0}
/* sidebar marka başlığı (yatay logo) */
.side-brand{padding:16px 14px 10px;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}
.side-brand img{height:34px;width:auto;max-width:100%;object-fit:contain;filter:var(--logo-filter)}
.side-top{padding:12px 12px 8px}
#new-chat{width:100%;background:linear-gradient(95deg,var(--acc),var(--acc2));color:#fff;padding:11px;font-weight:600;
  display:flex;align-items:center;justify-content:center;gap:6px}
#new-chat:hover{filter:brightness(1.08)}
#conv-list{flex:1;overflow-y:auto;padding:6px 8px}
.conv{padding:9px 11px;border-radius:9px;color:var(--tx2);cursor:pointer;display:flex;align-items:center;gap:6px;font-size:14px;margin-bottom:1px}
.conv:hover{background:var(--bg2);color:var(--tx)}
.conv.active{background:var(--accSoft);color:var(--tx)}
.conv .t{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv .x{opacity:0;color:var(--tx3);padding:2px 6px;border-radius:6px;font-size:13px}
.conv:hover .x{opacity:1}
.conv .x:hover{background:#3a1d24;color:var(--err)}
.side-bottom{border-top:1px solid var(--line);padding:10px;display:flex;flex-direction:column;gap:4px}
.side-bottom .ghost{text-align:left;padding:9px 11px;border-radius:9px;font-size:13.5px}
.side-bottom .ghost:hover{background:var(--bg2)}
.user-row{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:13px;color:var(--tx2);padding:4px 6px 2px}
.user-row .uname{flex:1;display:flex;align-items:center;gap:8px;min-width:0;overflow:hidden}
.user-row .uname b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.avatar-dot{width:26px;height:26px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-weight:700;font-size:12px}
.icon-btn{width:32px;height:32px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;
  border-radius:9px;background:transparent;color:var(--tx2);border:1px solid transparent}
.icon-btn:hover{background:var(--bg2);color:var(--tx);border-color:var(--line)}
.icon-btn svg{width:17px;height:17px}
.logout-btn:hover{color:var(--err);background:var(--bg2)}

#main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
/* soluk marka filigranı (yatay logo) — sohbet alanının arkasında, çok hafif, etkileşimsiz */
#main::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background:url("/static/logo-yatay.png") center 47% no-repeat;
  background-size:min(62vmin,460px);opacity:.06;filter:var(--wm-filter)}
#topbar,#messages,#composer{position:relative;z-index:1}
#topbar{height:56px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:0 20px;background:var(--bg)}
#conv-title{font-weight:600;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#conn-dot{width:8px;height:8px;border-radius:50%;background:var(--tx3)}
#conn-dot.ok{background:var(--ok)} #conn-dot.err{background:var(--err)}
#rag-badge{font-size:10.5px;background:#1c3a2c;color:#5fe0a8;padding:2px 8px;border-radius:20px;margin-left:8px;font-weight:600}

#messages{flex:1;overflow-y:auto;padding:26px 0;scroll-behavior:smooth}
/* WhatsApp tarzı: asistan solda, kullanıcı sağda; baloncuklar */
.msg{max-width:880px;margin:0 auto 16px;padding:0 24px;display:flex;gap:10px;align-items:flex-start}
.msg.user{flex-direction:row-reverse}
.msg .avatar{width:30px;height:30px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;margin-top:2px}
.msg.user .avatar{background:var(--user);color:#aebfe6}
.msg.assistant .avatar{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff}
.msg .content{max-width:78%;min-width:0;display:flex;flex-direction:column}
.msg.user .content{align-items:flex-end}
.msg .name{font-size:11px;color:var(--tx3);margin:0 4px 3px;font-weight:600}
.msg .body{line-height:1.6;font-size:15px;word-wrap:break-word;padding:11px 14px;border-radius:16px}
.msg.assistant .body{background:var(--abub);border:1px solid var(--abub-line);border-top-left-radius:5px}
.msg.user .body{background:var(--ubub);color:var(--ubub-tx);border:1px solid var(--ubub-line);border-top-right-radius:5px}
.msg.user .body a{color:var(--ubub-tx);text-decoration:underline}
.msg .body p{margin:0 0 12px} .msg .body p:last-child{margin-bottom:0}
.msg .body h1,.msg .body h2,.msg .body h3{margin:14px 0 8px;line-height:1.3}
.msg .body ul,.msg .body ol{margin:0 0 12px;padding-left:22px} .msg .body li{margin:3px 0}
.msg .body pre{background:#0a0c11;border:1px solid var(--line);border-radius:12px;padding:14px;overflow-x:auto;margin:8px 0}
.msg .body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}
.msg .body :not(pre)>code{background:var(--bg3);padding:2px 6px;border-radius:6px;font-size:.9em}
.msg .body a{color:#8aa6ff;text-decoration:none}.msg .body a:hover{text-decoration:underline}
.msg .body table{border-collapse:collapse;margin:10px 0;font-size:14px;width:100%}
.msg .body th,.msg .body td{border:1px solid var(--line2);padding:7px 11px;text-align:left}
.msg .body th{background:var(--bg2)}
.msg .body img{max-width:100%;border-radius:12px;margin:6px 0;border:1px solid var(--line)}
.msg .body audio{margin-top:8px;height:38px}
.cursor::after{content:"▍";color:var(--acc);animation:blink 1.1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}

/* araç izleri */
.trace{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.trace:empty{display:none}
.tool-chip{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--tx2);
  background:var(--bg2);border:1px solid var(--line);padding:3px 10px;border-radius:20px}
.tool-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--acc);box-shadow:0 0 6px var(--acc)}

/* aksiyon ikonları (mesaj altında, hover'da belirir) */
.msg-actions{display:flex;gap:4px;margin-top:10px;opacity:0;transition:opacity .15s}
.msg:hover .msg-actions,.msg-actions:focus-within{opacity:1}
.act-ico{width:30px;height:30px;display:flex;align-items:center;justify-content:center;
  background:transparent;color:var(--tx3);border-radius:8px}
.act-ico:hover{background:var(--bg3);color:var(--tx)}

/* kaynaklar akordeon */
.sources{margin-top:12px;border:1px solid var(--line);border-radius:10px;background:var(--bg1);overflow:hidden}
.sources summary{cursor:pointer;list-style:none;padding:9px 13px;font-size:12.5px;color:var(--tx2);
  display:flex;align-items:center;gap:7px;user-select:none}
.sources summary::-webkit-details-marker{display:none}
.sources summary b{color:var(--acc);font-weight:600}
.sources summary:hover{color:var(--tx)}
.sources[open] summary{border-bottom:1px solid var(--line)}
.src-item{font-size:12.5px;color:var(--tx2);padding:7px 13px;display:flex;gap:9px;align-items:baseline;border-bottom:1px solid var(--bg2)}
.src-item:last-child{border-bottom:none}
.src-n{flex-shrink:0;width:18px;height:18px;border-radius:5px;background:var(--bg3);color:var(--tx2);
  font-size:11px;display:inline-flex;align-items:center;justify-content:center}

.empty{max-width:560px;margin:16vh auto;text-align:center;color:var(--tx2)}
.empty h1{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px;
  background:linear-gradient(95deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}

/* composer */
#composer{padding:10px 16px 16px;background:linear-gradient(180deg,transparent,var(--bg) 28%)}
#composer-inner{max-width:760px;margin:0 auto;display:flex;gap:8px;align-items:flex-end;
  background:var(--bg2);border:1px solid var(--line2);border-radius:18px;padding:8px 8px 8px 6px;
  box-shadow:0 6px 24px rgba(0,0,0,.25)}
#composer-inner:focus-within{border-color:var(--acc)}
#mode{flex:0 0 auto;align-self:stretch;background:var(--bg3);border:1px solid var(--line);border-radius:12px;
  padding:0 8px;font-size:13px;font-weight:500;cursor:pointer}
#input{flex:1;background:transparent;border:none;resize:none;max-height:200px;padding:9px 6px;outline:none}
#send,#stop,#mic,#voicemode{width:38px;height:38px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px;border-radius:11px}
#mic,#voicemode{background:var(--bg3);color:var(--tx2)}
#mic:hover,#voicemode:hover{color:var(--tx)}
#mic.rec{background:#e0364d;color:#fff;animation:pulseRec 1s infinite}
#voicemode.on{background:#1c3a2c;color:#5fe0a8}
@keyframes pulseRec{50%{opacity:.5}}
#send{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff}
#send:hover{filter:brightness(1.08)}
#stop{background:var(--bg3);color:var(--tx);border:1px solid var(--line)}
.composer-hint{max-width:760px;margin:8px auto 0;text-align:center;color:var(--tx3);font-size:11px}

/* dialog */
dialog{background:var(--bg1);color:var(--tx);border:1px solid var(--line2);border-radius:18px;padding:24px;width:480px;max-width:92vw;
  box-shadow:0 30px 80px rgba(0,0,0,.55)}
dialog::backdrop{background:rgba(5,7,12,.6);backdrop-filter:blur(3px)}
dialog h3{margin:0 0 16px;font-size:17px}
dialog form{display:flex;flex-direction:column;gap:14px}
dialog label{display:flex;flex-direction:column;gap:6px;font-size:12.5px;color:var(--tx2)}
.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:4px}
.dialog-actions button[value=ok],#pr-save{background:var(--acc);color:#fff;padding:10px 18px;font-weight:600}
.dialog-actions button[value=cancel]{padding:10px 18px}

/* mesaj alt bilgi rozetleri (saat · süre · ~token) */
.msg-meta{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px;font-size:11px;color:var(--tx3);user-select:none}
.msg.user .msg-meta{justify-content:flex-end}
.msg-meta .mi{display:inline-flex;align-items:center;gap:3px;white-space:nowrap}

/* ayarlar bölümleri + ses testi */
.settings-sec{border-top:1px solid var(--line);padding-top:14px;margin-top:2px;display:flex;flex-direction:column}
.settings-sec-title{font-weight:600;font-size:13px;margin-bottom:10px}
.hint-inline{font-weight:400;color:var(--tx3);font-size:11.5px}
.btn-soft{background:var(--bg3);border:1px solid var(--line);color:var(--tx2);padding:8px 14px;border-radius:9px;font-size:13px}
.btn-soft:hover{color:var(--tx);border-color:var(--acc)}
.btn-soft:disabled{opacity:.6;cursor:default}

/* yönetim paneli linki — premium (artık 'basit' değil) */
#admin-link{display:flex;align-items:center;gap:8px;padding:10px 11px;border-radius:10px;font-size:13.5px;font-weight:600;
  color:var(--acc);background:var(--accSoft);border:1px solid transparent;text-decoration:none}
#admin-link:hover{border-color:var(--acc)}

.only-mobile{display:none}
@media(max-width:760px){
  #sidebar{position:absolute;z-index:20;height:100%;transform:translateX(-100%);transition:.2s;box-shadow:0 0 40px rgba(0,0,0,.5)}
  #sidebar.open{transform:none}
  .only-mobile{display:inline-flex}
  .msg{padding:0 14px}
}