*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;width:100%}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

:root{
  --bg:#212121;--bg2:#171717;--bg3:#2f2f2f;--bgh:#3a3a3a;--bga:#424242;
  --br:#343434;--brL:#4a4a4a;
  --txt:#ececec;--txt2:#b4b4b4;--txt3:#8b8b8b;
  --acc:#ececec;--accH:#ffffff;--accL:rgba(236,236,236,.08);--accG:rgba(0,0,0,.18);
  --acc2:#b4b4b4;--acc2L:rgba(236,236,236,.06);
  --aiBg:transparent;
  --danger:#f87171;--success:#4ade80;--warn:#fbbf24;
  --shadow:0 12px 36px rgba(0,0,0,.24);--shadowS:0 2px 12px rgba(0,0,0,.12);
  --r:14px;--rS:8px;--rL:22px;--rXL:32px;
  --tr:0.2s cubic-bezier(0.4,0,0.2,1);
  --sw:280px;--font:"Inter",sans-serif;
}
[data-theme="light"]{
  --bg:#ffffff;--bg2:#f9f9f9;--bg3:#f4f4f4;--bgh:#ececec;--bga:#e5e5e5;
  --br:#e5e5e5;--brL:#d0d0d0;
  --txt:#0d0d0d;--txt2:#626262;--txt3:#8b8b8b;
  --acc:#0d0d0d;--accH:#333333;--accL:rgba(0,0,0,.05);--accG:rgba(0,0,0,.12);
  --acc2:#626262;--acc2L:rgba(0,0,0,.04);
  --aiBg:transparent;
  --shadow:0 12px 36px rgba(0,0,0,.08);--shadowS:0 2px 12px rgba(0,0,0,.05);
}

body{font-family:var(--font);background:var(--bg);color:var(--txt);overflow:hidden;-webkit-font-smoothing:antialiased;line-height:1.6}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--br);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--acc)}

/* ============================
   PAGES SYSTEM
   ============================ */
.page-root{position:fixed;inset:0;height:100%;display:none;flex-direction:column}
.page-root.active{display:flex}

/* ============================
   INTRO PAGE
   ============================ */
#introPage{
  background:var(--bg);
  align-items:center;justify-content:flex-start;
  overflow-y:auto;overflow-x:hidden;position:relative;
  -webkit-overflow-scrolling:touch;touch-action:pan-y;overscroll-behavior-y:contain;
  height:100%;
}
.intro-bg{
  position:fixed;inset:0;
  background:
    radial-gradient(ellipse 70% 50% at 15% 50%,rgba(128,128,128,0.12) 0%,transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 30%,rgba(128,128,128,0.1) 0%,transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 90%,rgba(128,128,128,0.07) 0%,transparent 60%);
  pointer-events:none;z-index:0;
}
.intro-grid{
  position:fixed;inset:0;
  background-image:linear-gradient(var(--br) 1px,transparent 1px),linear-gradient(90deg,var(--br) 1px,transparent 1px);
  background-size:60px 60px;
  opacity:0.25;pointer-events:none;z-index:0;
}
.intro-content{
  position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;
  text-align:center;padding:60px 24px 80px;
  max-width:900px;width:100%;
  margin:0 auto;flex-shrink:0;
  animation:fadeUp .6s ease;
}
.intro-logo-wrap{
  width:110px;height:110px;border-radius:28px;
  overflow:hidden;margin:0 auto 28px;
  box-shadow:0 0 60px rgba(128,128,128,0.4),0 0 120px rgba(128,128,128,0.2);
  border:2px solid rgba(128,128,128,0.3);
  animation:logoPulse 3s ease-in-out infinite;
}
.intro-logo-wrap img{width:100%;height:100%;object-fit:cover;display:block}
@keyframes logoPulse{
  0%,100%{box-shadow:0 0 40px rgba(128,128,128,0.4),0 0 80px rgba(128,128,128,0.2)}
  50%{box-shadow:0 0 70px rgba(128,128,128,0.6),0 0 140px rgba(128,128,128,0.35)}
}
.intro-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accL);border:1px solid rgba(128,128,128,0.3);
  color:var(--acc);border-radius:20px;
  padding:5px 14px;font-size:12px;font-weight:600;
  letter-spacing:0.5px;margin-bottom:20px;
}
.intro-badge span{width:6px;height:6px;background:var(--acc);border-radius:50%;animation:blinkDot 1.5s ease infinite}
@keyframes blinkDot{0%,100%{opacity:1}50%{opacity:0.3}}
.intro-title{
  font-size:clamp(36px,7vw,68px);font-weight:800;
  letter-spacing:-2px;line-height:1.05;
  margin-bottom:16px;
}
.intro-title .t1{
  background:linear-gradient(135deg,#fff 0%,rgba(255,255,255,0.8) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.intro-title .t2{
  background:linear-gradient(135deg,var(--acc) 0%,var(--acc2) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.intro-sub{color:var(--txt2);font-size:clamp(14px,2vw,17px);max-width:520px;line-height:1.7;margin-bottom:36px}
.intro-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-bottom:60px}
.btn-intro-primary{
  padding:14px 36px;border-radius:var(--rXL);border:none;cursor:pointer;
  font-family:var(--font);font-size:16px;font-weight:700;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  color:white;box-shadow:0 8px 32px rgba(128,128,128,0.4);
  transition:var(--tr);display:flex;align-items:center;gap:8px;
}
.btn-intro-primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(128,128,128,0.55)}
.btn-intro-secondary{
  padding:14px 28px;border-radius:var(--rXL);cursor:pointer;
  font-family:var(--font);font-size:15px;font-weight:600;
  background:transparent;border:1.5px solid var(--br);
  color:var(--txt2);transition:var(--tr);
}
.btn-intro-secondary:hover{border-color:var(--acc);color:var(--acc);background:var(--accL)}

/* Feature cards grid */
.intro-features{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:14px;width:100%;max-width:820px;margin-bottom:60px;
}
.intro-feat{
  background:var(--bg2);border:1px solid var(--br);
  border-radius:var(--r);padding:22px 18px;text-align:left;
  transition:var(--tr);
}
.intro-feat:hover{border-color:var(--acc);transform:translateY(-2px);box-shadow:0 8px 24px var(--accG)}
.intro-feat-icon{font-size:28px;margin-bottom:12px}
.intro-feat-title{font-size:14px;font-weight:700;color:var(--txt);margin-bottom:6px}
.intro-feat-desc{font-size:13px;color:var(--txt2);line-height:1.6}

/* Stats row */
.intro-stats{
  display:flex;gap:0;width:100%;max-width:700px;
  background:var(--bg2);border:1px solid var(--br);border-radius:var(--r);
  overflow:hidden;margin-bottom:60px;
}
.intro-stat{
  flex:1;padding:24px 16px;text-align:center;
  border-right:1px solid var(--br);
}
.intro-stat:last-child{border-right:none}
.intro-stat-num{font-size:28px;font-weight:800;letter-spacing:-1px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:4px;
}
.intro-stat-label{font-size:12px;color:var(--txt2);font-weight:500}

/* Use cases */
.intro-usecases-title{
  font-size:22px;font-weight:700;letter-spacing:-.5px;
  color:var(--txt);margin-bottom:6px;
}
.intro-usecases-sub{color:var(--txt2);font-size:14px;margin-bottom:28px}
.intro-usecases{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:12px;width:100%;max-width:720px;margin-bottom:60px;
}
.intro-usecase{
  background:var(--bg2);border:1px solid var(--br);
  border-radius:var(--r);padding:18px 20px;
  text-align:left;display:flex;gap:14px;align-items:flex-start;
  transition:var(--tr);
}
.intro-usecase:hover{border-color:var(--acc);background:var(--bgh)}
.intro-usecase-icon{
  width:38px;height:38px;border-radius:10px;
  background:var(--accL);display:flex;align-items:center;justify-content:center;
  font-size:18px;flex-shrink:0;
}
.intro-usecase-title{font-size:13.5px;font-weight:700;color:var(--txt);margin-bottom:3px}
.intro-usecase-desc{font-size:12px;color:var(--txt2);line-height:1.5}

/* Testimonials */
.intro-testimonials-title{
  font-size:22px;font-weight:700;letter-spacing:-.5px;
  color:var(--txt);margin-bottom:6px;
}
.intro-testimonials-sub{color:var(--txt2);font-size:14px;margin-bottom:28px}
.intro-testimonials{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:14px;width:100%;max-width:820px;margin-bottom:60px;
}
.intro-testimonial{
  background:var(--bg2);border:1px solid var(--br);
  border-radius:var(--r);padding:20px;text-align:left;
}
.intro-testimonial-text{
  font-size:13px;color:var(--txt2);line-height:1.7;
  margin-bottom:14px;font-style:italic;
}
.intro-testimonial-author{
  display:flex;align-items:center;gap:10px;
}
.intro-testimonial-avatar{
  width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:white;flex-shrink:0;
}
.intro-testimonial-name{font-size:13px;font-weight:600;color:var(--txt)}
.intro-testimonial-role{font-size:11px;color:var(--txt2)}

/* Bottom CTA */
.intro-cta{
  background:linear-gradient(135deg,rgba(128,128,128,0.1),rgba(128,128,128,0.08));
  border:1px solid rgba(128,128,128,0.2);
  border-radius:var(--rL);padding:40px 32px;
  width:100%;max-width:620px;margin-bottom:20px;
}
.intro-cta-title{font-size:24px;font-weight:700;letter-spacing:-.5px;margin-bottom:10px;color:var(--txt)}
.intro-cta-sub{color:var(--txt2);font-size:14px;margin-bottom:24px;line-height:1.7}
.intro-footer{font-size:12px;color:var(--txt2);opacity:.6;margin-top:24px}

/* ============================
   AUTH PAGE
   ============================ */
#authPage{
  background:var(--bg);
  align-items:center;justify-content:center;
  overflow-y:auto;
}
.auth-bg{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%,rgba(128,128,128,0.1) 0%,transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 80%,rgba(128,128,128,0.08) 0%,transparent 60%);
}
.auth-wrap{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:center;
  min-height:100%;width:100%;padding:24px 16px;
}
.auth-card{
  background:var(--bg2);border:1px solid var(--br);border-radius:var(--rL);
  padding:36px 32px;width:100%;max-width:420px;
  box-shadow:var(--shadow);animation:fadeUp .4s ease;position:relative;
}
#registerCard{max-width:400px;padding:26px 28px}
#registerCard .auth-logo-wrap{margin-bottom:14px}
#registerCard .auth-logo-img{width:44px;height:44px;border-radius:12px}
#registerCard .auth-brand{font-size:18px}
#registerCard .auth-title{font-size:17px;margin-bottom:14px}
#registerCard .fgroup{margin-bottom:10px}
#registerCard .flabel{font-size:12px;margin-bottom:5px}
#registerCard .finput{padding:9px 13px;font-size:13.5px}
#registerCard .btn-auth{padding:11px;font-size:14px;margin-top:4px}
#registerCard .auth-switch{margin-top:12px;font-size:13px}
#registerCard .auth-divider{margin:12px 0}
#registerCard .btn-google{padding:9px 16px;font-size:13px}
#registerCard .remember-row{margin-top:8px}

.auth-logo-wrap{display:flex;align-items:center;gap:10px;margin-bottom:22px}
.auth-logo-img{width:52px;height:52px;border-radius:14px;object-fit:cover;box-shadow:0 4px 16px rgba(128,128,128,0.35)}
.auth-brand{font-size:22px;font-weight:800;letter-spacing:-0.5px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.auth-brand-sub{font-size:12px;color:var(--txt2);margin-top:1px}
.auth-title{font-size:20px;font-weight:700;margin-bottom:20px;color:var(--txt)}

.fgroup{margin-bottom:14px}
.flabel{display:block;font-size:13px;font-weight:500;color:var(--txt2);margin-bottom:6px;letter-spacing:0.2px}
.finput{
  width:100%;padding:11px 14px;background:var(--bg3);
  border:1.5px solid var(--br);border-radius:var(--rS);
  color:var(--txt);font-family:var(--font);font-size:14.5px;
  outline:none;transition:var(--tr);
}
.finput:focus{border-color:var(--acc);box-shadow:0 0 0 3px var(--accL)}
.finput::placeholder{color:var(--txt3);opacity:0.8}

.remember-row{
  display:flex;align-items:center;gap:8px;
  margin-top:10px;margin-bottom:2px;
}
.remember-row input[type=checkbox]{
  width:15px;height:15px;accent-color:var(--acc);cursor:pointer;
}
.remember-row label{font-size:13px;color:var(--txt2);cursor:pointer;user-select:none}

.errmsg{color:var(--danger);font-size:12.5px;margin-top:5px;display:none}
.errmsg.show{display:block;animation:fadeIn .2s ease}

.btn-auth{
  width:100%;padding:12px;border-radius:var(--rS);border:none;
  cursor:pointer;font-family:var(--font);font-size:15px;font-weight:700;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  color:white;box-shadow:0 4px 20px rgba(128,128,128,0.35);
  transition:var(--tr);margin-top:6px;
}
.btn-auth:hover{transform:translateY(-1px);box-shadow:0 6px 28px rgba(128,128,128,0.5)}
.btn-auth:active{transform:translateY(0)}

.auth-divider{
  display:flex;align-items:center;gap:10px;
  color:var(--txt3);font-size:12px;margin:16px 0;
}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:var(--br)}

.btn-google{
  width:100%;display:flex;align-items:center;justify-content:center;
  gap:10px;padding:11px 16px;border-radius:var(--rS);
  background:var(--bg3);border:1.5px solid var(--br);
  color:var(--txt);font-family:var(--font);font-size:14px;font-weight:500;
  cursor:pointer;transition:var(--tr);
}
.btn-google:hover{background:var(--bgh);border-color:var(--acc)}
.btn-google img,.btn-google svg{width:18px;height:18px;flex-shrink:0}

.auth-switch{text-align:center;margin-top:18px;font-size:13.5px;color:var(--txt2)}
.auth-switch a{color:var(--acc);text-decoration:none;font-weight:600;cursor:pointer}
.auth-switch a:hover{text-decoration:underline}

.back-btn{
  position:fixed;top:16px;left:16px;z-index:20;
  display:flex;align-items:center;gap:6px;
  background:var(--bg2);border:1px solid var(--br);cursor:pointer;
  color:var(--txt2);font-size:13px;font-family:var(--font);
  padding:6px 10px;border-radius:var(--rS);transition:var(--tr);
  box-shadow:var(--shadowS);
}
.back-btn:hover{background:var(--bg3);color:var(--txt)}
.back-btn svg{width:15px;height:15px}

/* ============================
   MAIN APP
   ============================ */
#appPage{height:100vh;height:100dvh;height:var(--app-viewport-height,100vh);min-height:0;flex-direction:row;overflow:hidden}

/* SIDEBAR */
.sidebar{
  width:var(--sw);min-width:var(--sw);
  background:var(--bg2);border-right:1px solid var(--br);
  display:flex;flex-direction:column;height:100%;
  overflow:hidden;transition:transform .3s cubic-bezier(0.4,0,0.2,1);
  position:relative;z-index:10;flex-shrink:0;
}
.sb-header{padding:16px 14px 12px;border-bottom:1px solid var(--br);flex-shrink:0}
.sb-logo{display:flex;align-items:center;gap:9px;margin-bottom:12px}
.sb-logo-img{width:32px;height:32px;border-radius:9px;object-fit:cover;
  box-shadow:0 2px 10px rgba(128,128,128,0.35);flex-shrink:0}
.sb-brand{font-size:16px;font-weight:800;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn-new{
  width:100%;display:flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:var(--rS);border:1.5px solid rgba(128,128,128,0.25);
  background:var(--accL);color:var(--acc);font-family:var(--font);
  font-size:13.5px;font-weight:600;cursor:pointer;transition:var(--tr);
}
.btn-new:hover{background:var(--acc);color:white;border-color:var(--acc);box-shadow:0 4px 16px var(--accG)}
.btn-new svg{width:15px;height:15px;flex-shrink:0}

.sb-search{padding:10px 12px;border-bottom:1px solid var(--br);flex-shrink:0}
.sb-search-wrap{position:relative;display:flex;align-items:center}
.sb-search-wrap svg{position:absolute;left:9px;color:var(--txt2);width:14px;height:14px;pointer-events:none}
.sb-search-input{
  width:100%;padding:8px 10px 8px 30px;
  background:var(--bg3);border:1px solid var(--br);border-radius:var(--rS);
  color:var(--txt);font-family:var(--font);font-size:13px;outline:none;transition:var(--tr);
}
.sb-search-input:focus{border-color:var(--acc)}
.sb-search-input::placeholder{color:var(--txt3);opacity:0.7}

.sb-convs{flex:1;overflow-y:auto;padding:6px 8px}
.sb-date-lbl{font-size:10.5px;font-weight:700;color:var(--txt3);text-transform:uppercase;letter-spacing:.8px;padding:8px 8px 4px;opacity:.8}
.conv-item{
  display:flex;align-items:center;gap:7px;
  padding:2px 4px;border-radius:var(--rS);
  transition:var(--tr);position:relative;
}
.conv-item:hover{background:var(--bgh)}
.conv-item.active{background:var(--bga)}
.conv-icon{width:28px;height:28px;border-radius:8px;overflow:hidden;flex-shrink:0}
.conv-icon img{width:100%;height:100%;object-fit:cover}
.conv-title{flex:1;min-width:0;border:0;border-radius:4px;background:none;padding:4px 2px;font:inherit;font-size:13px;color:var(--txt);text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer}
.conv-title:focus-visible{outline:2px solid var(--acc);outline-offset:1px}
.conv-acts{display:none;gap:2px;flex-shrink:0}
.conv-item:hover .conv-acts,.conv-item:focus-within .conv-acts,.conv-item.active .conv-acts{display:flex}
.conv-act{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:6px;background:none;border:none;color:var(--txt2);cursor:pointer;transition:var(--tr);
}
.conv-act:focus-visible{outline:2px solid var(--acc);outline-offset:1px}
.conv-act:hover{background:var(--bg3);color:var(--txt)}
.conv-act.del:hover{background:rgba(248,113,113,.15);color:var(--danger)}
.conv-act svg{width:12px;height:12px}
.conv-edit-inp{
  flex:1;background:var(--bg3);border:1px solid var(--acc);border-radius:5px;
  padding:2px 7px;color:var(--txt);font-family:var(--font);font-size:13px;outline:none;
}
.no-convs{text-align:center;padding:28px 12px;color:var(--txt2);font-size:12.5px}
.no-convs svg{width:26px;height:26px;display:block;margin:0 auto 8px;opacity:.35}

.sb-footer{border-top:1px solid var(--br);padding:6px 8px;flex-shrink:0}
.user-row{display:flex;align-items:center;gap:9px;padding:8px 10px;margin-bottom:2px}
.user-av{
  width:30px;height:30px;border-radius:50%;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:white;flex-shrink:0;
  overflow:hidden;position:relative;
}
.user-av img{width:100%;height:100%;object-fit:cover;display:block}
.user-name{font-size:12.5px;font-weight:600;color:var(--txt);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acct-avatar-wrap{
  width:64px;height:64px;border-radius:50%;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  display:flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:700;color:white;flex-shrink:0;
  overflow:hidden;position:relative;
}
.acct-avatar-wrap img{width:100%;height:100%;object-fit:cover;display:block}
.acct-photo-row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.acct-photo-info{display:flex;align-items:center;gap:14px}
.acct-form-row{display:flex;flex-direction:column;align-items:stretch;gap:10px}
.acct-form-row .save-btn{width:auto;align-self:flex-start;padding:9px 20px}
.set-list-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-radius:var(--r);border:1.5px solid var(--br);
  background:var(--bg2);color:var(--txt);font-family:var(--font);
  font-size:14.5px;font-weight:600;cursor:pointer;transition:var(--tr);
  margin-top:10px;
}
.set-list-btn:hover{background:var(--bgh);border-color:var(--acc)}
.set-list-btn svg{width:16px;height:16px;color:var(--txt2)}
.set-list-btn.danger{color:var(--danger);border-color:rgba(248,113,113,.3)}
.set-list-btn.danger:hover{background:rgba(248,113,113,.1);border-color:var(--danger)}
.user-email{font-size:11px;color:var(--txt2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.divider{height:1px;background:var(--br);margin:4px 0}
.sb-nav{
  display:flex;align-items:center;gap:9px;
  padding:9px 11px;border-radius:var(--rS);cursor:pointer;
  color:var(--txt2);font-size:13.5px;font-weight:500;
  border:none;background:none;width:100%;text-align:left;
  font-family:var(--font);transition:var(--tr);
}
.sb-nav svg{width:16px;height:16px;flex-shrink:0}
.sb-nav:hover{background:var(--bgh);color:var(--txt)}
.sb-nav.danger:hover{background:rgba(248,113,113,.1);color:var(--danger)}

/* MAIN CONTENT */
.main{flex:1 1 auto;display:flex;flex-direction:column;height:100%;overflow:hidden;background:var(--bg);min-width:0;width:100%}

/* TOPBAR */
.topbar{
  height:54px;display:flex;align-items:center;padding:0 18px;
  border-bottom:1px solid var(--br);background:var(--bg);
  gap:10px;flex-shrink:0;
}
.menu-toggle{
  display:none;width:34px;height:34px;align-items:center;justify-content:center;
  background:none;border:none;cursor:pointer;color:var(--txt2);border-radius:var(--rS);transition:var(--tr);
}
.menu-toggle:hover{background:var(--bgh);color:var(--txt)}
.menu-toggle svg,.icon-btn svg{width:18px;height:18px}
.topbar-title{flex:1;font-size:14.5px;font-weight:600;color:var(--txt);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.icon-btn{
  width:34px;height:34px;display:flex;align-items:center;justify-content:center;
  background:none;border:none;cursor:pointer;color:var(--txt2);border-radius:var(--rS);transition:var(--tr);
}
.icon-btn:hover{background:var(--bgh);color:var(--txt)}

/* CHAT AREA */
.chat-area{flex:1;overflow-y:auto;display:flex;flex-direction:column;align-items:center;width:100%}
.chat-msgs{max-width:800px;width:100%;padding:24px 20px 16px;display:flex;flex-direction:column;gap:4px;align-self:center}

/* WELCOME */
.welcome{
  flex:1;display:flex;flex-direction:column;align-items:center;
  justify-content:center;padding:40px 20px;text-align:center;animation:fadeUp .5s ease;
  width:100%;align-self:center;
}
.welcome-logo{
  width:80px;height:80px;border-radius:22px;overflow:hidden;
  margin:0 auto 20px;box-shadow:0 0 40px rgba(128,128,128,0.4),0 0 80px rgba(128,128,128,0.2);
  border:2px solid rgba(128,128,128,0.2);
}
.welcome-logo img{width:100%;height:100%;object-fit:cover}
.welcome-title{
  font-size:clamp(22px,4vw,30px);font-weight:700;letter-spacing:-.8px;
  background:linear-gradient(135deg,var(--txt) 0%,var(--acc) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:10px;
}
.welcome-sub{color:var(--txt2);font-size:14.5px;max-width:380px;line-height:1.7;margin-bottom:32px}
.sug-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;max-width:500px;width:100%}
.sug-card{
  background:var(--bg2);border:1px solid var(--br);border-radius:var(--r);
  padding:13px 15px;cursor:pointer;text-align:left;transition:var(--tr);font-family:var(--font);
}
.sug-card:hover{border-color:var(--acc);background:var(--bgh);transform:translateY(-1px);box-shadow:0 4px 16px var(--accG)}
.sug-lbl{font-size:11px;color:var(--acc);font-weight:700;margin-bottom:4px;letter-spacing:.3px}
.sug-txt{font-size:13px;color:var(--txt);line-height:1.5}

/* MESSAGES */
.msg-row{display:flex;flex-direction:column;animation:msgIn .3s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.msg-row.user{align-items:flex-end}
.msg-row.assistant{align-items:flex-start}
.msg-wrap{max-width:88%;display:flex;flex-direction:column;gap:5px}
.msg-row.user .msg-wrap{align-items:flex-end}
.msg-row.assistant .msg-wrap{align-items:flex-start}
.msg-bubble{padding:12px 16px;border-radius:var(--r);font-size:14.5px;line-height:1.7;position:relative}
.msg-row.user .msg-bubble{
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  color:white;border-bottom-right-radius:4px;
}
.msg-row.assistant .msg-bubble{
  background:var(--aiBg);border:1px solid var(--br);
  color:var(--txt);border-bottom-left-radius:4px;
}
.msg-bubble p{margin-bottom:9px}.msg-bubble p:last-child{margin-bottom:0}
.msg-bubble ul,.msg-bubble ol{padding-left:20px;margin-bottom:9px}
.msg-bubble li{margin-bottom:3px}
.msg-bubble h1,.msg-bubble h2,.msg-bubble h3{margin:12px 0 7px;font-weight:600}
.msg-bubble h1{font-size:1.2em}.msg-bubble h2{font-size:1.08em}.msg-bubble h3{font-size:1em}
.msg-bubble strong{font-weight:600}.msg-bubble em{font-style:italic}
.msg-bubble a{color:var(--acc);text-decoration:underline}
.msg-row.user .msg-bubble a{color:rgba(255,255,255,.9)}
.msg-bubble blockquote{border-left:3px solid var(--acc);padding-left:12px;color:var(--txt2);margin:8px 0}
.msg-bubble table{width:100%;border-collapse:collapse;margin:9px 0;font-size:13px}
.msg-bubble th,.msg-bubble td{border:1px solid var(--br);padding:6px 11px;text-align:left}
.msg-bubble th{background:var(--bg3);font-weight:600}
.msg-bubble hr{border:none;border-top:1px solid var(--br);margin:10px 0}
.msg-bubble pre{background:#171717!important;border-radius:var(--rS);margin:9px 0;overflow:hidden;border:1px solid var(--br);font-size:13px}
.code-hdr{display:flex;align-items:center;justify-content:space-between;padding:7px 13px;background:#141414;border-bottom:1px solid #343434}
.code-lang{font-size:10.5px;color:#a0a0a0;font-weight:700;text-transform:uppercase;letter-spacing:.5px}
.copy-code{display:flex;align-items:center;gap:4px;background:none;border:none;cursor:pointer;color:#a0a0a0;font-size:11px;padding:3px 7px;border-radius:5px;transition:var(--tr);font-family:var(--font)}
.copy-code:hover{background:rgba(255,255,255,.08);color:white}.copy-code svg{width:12px;height:12px}
.msg-bubble pre code{display:block;padding:13px 15px;font-size:13px;line-height:1.6}
.msg-bubble code:not(pre code){background:rgba(128,128,128,.15);color:#6ab4f0;padding:2px 5px;border-radius:4px;font-size:.88em;font-family:monospace}
.msg-row.user .msg-bubble code:not(pre code){background:rgba(255,255,255,.2);color:white}
.msg-acts{display:flex;gap:2px;opacity:0;transition:var(--tr);padding:2px 0}
.msg-row:hover .msg-acts{opacity:1}
.msg-act{display:flex;align-items:center;gap:4px;background:none;border:none;cursor:pointer;color:var(--txt2);font-size:11.5px;padding:4px 8px;border-radius:6px;transition:var(--tr);font-family:var(--font)}
.msg-act:hover{background:var(--bgh);color:var(--txt)}
.msg-act.danger:hover{background:rgba(248,113,113,.1);color:var(--danger)}
.msg-act svg{width:12px;height:12px}

/* TYPING */
.typing-ind{display:flex;align-items:center;gap:4px;padding:13px 16px;background:var(--aiBg);border:1px solid var(--br);border-radius:var(--r);border-bottom-left-radius:4px;width:fit-content}
.typ-dot{width:6px;height:6px;border-radius:50%;background:var(--txt2);animation:typPulse 1.4s ease infinite}
.typ-dot:nth-child(2){animation-delay:.2s}.typ-dot:nth-child(3){animation-delay:.4s}
@keyframes typPulse{0%,60%,100%{opacity:.3;transform:scale(1)}30%{opacity:1;transform:scale(1.15)}}
.msg-wrap.thinking-status{max-width:100%;padding:5px 0;color:var(--txt2);font-size:14px;line-height:1.5;animation:thinkingStatusGlow .8s ease-in-out infinite}
@keyframes thinkingStatusGlow{0%,100%{opacity:.86;text-shadow:0 0 0 rgba(255,255,255,0)}50%{opacity:1;text-shadow:0 0 5px rgba(255,255,255,.72),0 0 12px currentColor}}
@media (prefers-reduced-motion:reduce){.msg-wrap.thinking-status{animation:none;text-shadow:none}}

/* INPUT */
.input-area{flex-shrink:0;padding:14px 18px 12px;background:var(--bg);border-top:1px solid var(--br);display:flex;justify-content:center;width:100%}
.input-wrap{max-width:800px;width:100%;margin:0 auto}
.input-box{
  background:var(--bg2);border:1.5px solid var(--br);border-radius:var(--rL);
  padding:4px 4px 4px 6px;display:flex;align-items:flex-end;gap:6px;
  transition:var(--tr);box-shadow:var(--shadowS);
}
.input-box:focus-within{border-color:var(--acc);box-shadow:0 0 0 3px var(--accL)}
.attach-btn{
  width:34px;height:34px;background:none;border:none;border-radius:10px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;color:var(--txt2);
  transition:var(--tr);flex-shrink:0;margin-bottom:4px;
}
.attach-btn:hover{background:var(--bgh);color:var(--acc)}
.attach-btn svg{width:18px;height:18px}
.attach-btn.has-imgs{color:var(--acc)}
.img-preview-strip{
  display:flex;gap:8px;flex-wrap:wrap;padding:0 2px;margin-bottom:0;
}
.img-preview-strip:not(:empty){margin-bottom:10px}
.img-chip{
  position:relative;width:64px;height:64px;border-radius:10px;overflow:hidden;
  border:1.5px solid var(--br);flex-shrink:0;box-shadow:var(--shadowS);
}
.img-chip img{width:100%;height:100%;object-fit:cover;display:block}
.img-chip.file-chip{width:auto;min-width:150px;max-width:260px;height:36px;display:flex;align-items:center;padding:0 25px 0 10px;overflow:hidden}
.img-chip.file-chip span{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.img-chip.file-chip .img-chip-rm{top:9px;right:5px}
.img-chip .img-chip-rm{
  position:absolute;top:2px;right:2px;width:18px;height:18px;border-radius:50%;
  background:rgba(0,0,0,0.65);border:none;cursor:pointer;color:#fff;
  display:flex;align-items:center;justify-content:center;padding:0;
}
.img-chip .img-chip-rm svg{width:11px;height:11px}
.img-chip .img-chip-rm:hover{background:var(--danger)}
.msg-imgs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.msg-imgs img{max-width:220px;max-height:220px;border-radius:12px;object-fit:cover;
  border:1px solid var(--br);cursor:pointer;display:block}
#msgInput{
  flex:1;background:none;border:none;outline:none;
  color:var(--txt);font-family:var(--font);font-size:14.5px;
  resize:none;min-height:42px;max-height:180px;padding:9px 0;line-height:1.6;
}
#msgInput::placeholder{color:var(--txt3);opacity:.7}
.send-btn{
  width:36px;height:36px;background:linear-gradient(135deg,var(--acc),var(--acc2));
  border:none;border-radius:11px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:var(--tr);flex-shrink:0;margin-bottom:2px;box-shadow:0 2px 10px var(--accG);
}
.send-btn:hover{transform:scale(1.07);box-shadow:0 4px 18px var(--accG)}
.send-btn:active{transform:scale(.95)}
.send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}
.send-btn svg{width:17px;height:17px;color:white}
.stop-btn{
  width:36px;height:36px;background:var(--bg3);border:1.5px solid var(--br);
  border-radius:11px;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:var(--tr);flex-shrink:0;margin-bottom:2px;display:none;
}
.stop-btn:hover{background:rgba(248,113,113,.15);border-color:var(--danger)}
.stop-btn svg{width:15px;height:15px;color:var(--txt)}
.footer-note{text-align:center;font-size:11.5px;color:var(--txt2);margin-top:9px;opacity:.65}

/* INNER PAGES */
.inner-page{display:none;flex:1;overflow-y:auto;padding:28px 22px}
.inner-page.active{display:block}
.pg-header{margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--br)}
.pg-title{font-size:22px;font-weight:700;letter-spacing:-.5px;margin-bottom:5px}
.pg-sub{color:var(--txt2);font-size:13.5px}
.pg-body{max-width:640px}

/* Settings */
.set-section{margin-bottom:28px}
.set-section-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--txt2);margin-bottom:12px}
.set-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--br);gap:16px;flex-wrap:wrap}
.set-row:last-child{border-bottom:none}
.set-lbl{font-size:14.5px;font-weight:500}
.set-desc{font-size:12.5px;color:var(--txt2);margin-top:2px}
.opt-grid{display:flex;gap:7px;flex-wrap:wrap}
.opt-chip{
  padding:6px 15px;border-radius:20px;border:1.5px solid var(--br);cursor:pointer;
  font-size:12.5px;font-weight:500;color:var(--txt2);transition:var(--tr);
  background:var(--bg3);font-family:var(--font);
}
.opt-chip:hover{border-color:var(--acc);color:var(--acc)}
.opt-chip.sel{background:linear-gradient(135deg,var(--acc),var(--acc2));border-color:var(--acc);color:white}
.save-btn{
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:white;
  padding:10px 28px;border-radius:var(--rS);border:none;font-weight:700;
  font-size:14px;cursor:pointer;transition:var(--tr);font-family:var(--font);
  margin-top:20px;box-shadow:0 4px 16px var(--accG);
}
.save-btn:hover{transform:translateY(-1px);box-shadow:0 6px 24px var(--accG)}

/* About */
.about-hero{
  text-align:center;padding:36px 20px;background:var(--bg2);
  border-radius:var(--rL);margin-bottom:22px;border:1px solid var(--br);
}
.about-logo-img{
  width:80px;height:80px;border-radius:22px;object-fit:cover;
  margin:0 auto 16px;display:block;
  box-shadow:0 0 40px rgba(128,128,128,0.5),0 0 80px rgba(128,128,128,0.2);
  border:2px solid rgba(128,128,128,0.25);
}
.about-name{
  font-size:28px;font-weight:800;letter-spacing:-1px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:7px;
}
.about-tag{color:var(--txt2);font-size:14.5px}
.about-card{background:var(--bg2);border:1px solid var(--br);border-radius:var(--r);padding:20px 22px;margin-bottom:12px}
.about-card-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--acc);margin-bottom:7px}
.about-card-body{color:var(--txt2);font-size:13.5px;line-height:1.7}
.about-card-body strong{color:var(--txt)}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.65);backdrop-filter:blur(5px);z-index:500;display:none;align-items:center;justify-content:center;padding:16px}
.modal-overlay.show{display:flex;animation:fadeIn .2s ease}
.modal{background:var(--bg2);border:1px solid var(--br);border-radius:var(--rL);padding:26px;max-width:400px;width:100%;box-shadow:var(--shadow);animation:fadeUp .3s ease}
.modal-title{font-size:17px;font-weight:700;margin-bottom:9px}
.modal-body{color:var(--txt2);font-size:13.5px;margin-bottom:22px;line-height:1.6}
.modal-acts{display:flex;gap:9px;justify-content:flex-end}
.btn-mc{background:var(--bg3);border:1px solid var(--br);color:var(--txt);padding:9px 18px;border-radius:var(--rS);font-size:13.5px;font-weight:500;cursor:pointer;transition:var(--tr);font-family:var(--font)}
.btn-mc:hover{background:var(--bgh)}
.btn-md{background:var(--danger);color:white;border:none;padding:9px 18px;border-radius:var(--rS);font-size:13.5px;font-weight:700;cursor:pointer;transition:var(--tr);font-family:var(--font)}
.btn-md:hover{filter:brightness(1.1)}

/* TOAST */
.toast-box{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:1000}
.toast{
  background:var(--bg2);border:1px solid var(--br);border-radius:var(--rS);
  padding:11px 16px;font-size:13px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:9px;min-width:200px;max-width:320px;
  animation:toastIn .3s ease;
}
@keyframes toastIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
.toast.success{border-left:3px solid var(--success)}
.toast.error{border-left:3px solid var(--danger)}
.toast.info{border-left:3px solid var(--acc)}
.toast svg{width:15px;height:15px;flex-shrink:0}
.toast.success svg{color:var(--success)}.toast.error svg{color:var(--danger)}.toast.info svg{color:var(--acc)}

/* SIDEBAR OVERLAY mobile */
.sb-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:9}

/* ANIMATIONS */
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* RESPONSIVE */
@media(max-width:768px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:10;transform:translateX(-100%);box-shadow:var(--shadow);width:82vw;max-width:320px;min-width:240px}
  .sidebar.open{transform:translateX(0)}
  .sb-overlay.show{display:block}
  .menu-toggle{display:flex}
  .sug-grid{grid-template-columns:1fr;max-width:360px}
  .auth-card{padding:28px 22px}
  #registerCard{padding:22px 18px}
  .intro-features{grid-template-columns:1fr;gap:8px;max-width:340px}
  .chat-msgs{padding:16px 12px 12px}
  .input-area{padding:10px 10px calc(8px + env(safe-area-inset-bottom, 0px))}
  .msg-wrap{max-width:94%}
  .set-row{flex-direction:column;align-items:flex-start;gap:10px}
  .topbar{padding-top:env(safe-area-inset-top, 0px);height:calc(54px + env(safe-area-inset-top, 0px))}
  .icon-btn,.menu-toggle{width:40px;height:40px}
  .send-btn,.stop-btn{width:40px;height:40px}
  .msg-act,.conv-act{min-height:28px}
  #msgInput{font-size:16px}
}
@media(max-width:480px){
  .intro-title{font-size:32px;letter-spacing:-1px}
  .btn-intro-primary,.btn-intro-secondary{width:100%;justify-content:center}
  .intro-actions{flex-direction:column;width:100%;max-width:280px}
  .intro-logo-wrap{width:90px;height:90px}
  .auth-card,.modal{padding:22px 16px}
}

/* CluserAI conversational workspace refresh */
:root{
  --bg:#212121;--bg2:#171717;--bg3:#2f2f2f;--bgh:#3a3a3a;--bga:#424242;
  --br:#343434;--brL:#4a4a4a;--txt:#ececec;--txt2:#b4b4b4;--txt3:#8b8b8b;
  --acc:#ececec;--accH:#ffffff;--accL:rgba(236,236,236,.08);--accG:rgba(0,0,0,.18);
  --acc2:#b4b4b4;--acc2L:rgba(236,236,236,.06);--aiBg:transparent;
  --shadow:0 12px 36px rgba(0,0,0,.24);--shadowS:0 2px 12px rgba(0,0,0,.12);
  --r:16px;--rS:10px;--rL:20px;--rXL:26px;--sw:264px;
}
[data-theme="light"]{
  --bg:#ffffff;--bg2:#f9f9f9;--bg3:#f4f4f4;--bgh:#ececec;--bga:#e5e5e5;
  --br:#e5e5e5;--brL:#d0d0d0;--txt:#0d0d0d;--txt2:#626262;--txt3:#8b8b8b;
  --acc:#0d0d0d;--accH:#333333;--accL:rgba(0,0,0,.05);--accG:rgba(0,0,0,.12);
  --acc2:#626262;--acc2L:rgba(0,0,0,.04);--aiBg:transparent;
  --shadow:0 12px 36px rgba(0,0,0,.08);--shadowS:0 2px 12px rgba(0,0,0,.05);
}
html,body{background:var(--bg);color:var(--txt)}
#appPage{background:var(--bg)}
.sidebar{background:var(--bg2);border-right:1px solid var(--br);padding:0 10px}
.sb-header{padding:18px 8px 14px;border-bottom:0}
.sb-brand{font-size:16px;letter-spacing:-.025em}
.btn-new{border:1px solid var(--br);border-radius:12px;background:transparent;color:var(--txt);box-shadow:none}
.btn-new:hover,.sb-nav:hover{background:var(--bg3);border-color:var(--brL)}
.sb-nav{border-radius:10px;color:var(--txt2)}
.sb-nav.active{background:var(--bg3);color:var(--txt)}
.sb-search-wrap{margin:8px 0 12px}
.sb-search-input{background:transparent;border:1px solid var(--br);border-radius:10px}
.main{background:var(--bg)}
.chat-area{background:var(--bg);scrollbar-color:var(--brL) transparent}
.chat-msgs{max-width:820px;padding:30px 22px 22px;gap:18px}
.welcome{max-width:760px;width:100%;padding:44px 24px 34px}
.welcome-logo{width:48px;height:48px;margin-bottom:18px;filter:drop-shadow(0 5px 18px rgba(128,128,128,.16))}
.welcome-title{font-size:30px;letter-spacing:-.035em;font-weight:650;margin-bottom:9px}
.welcome-sub{font-size:15px;line-height:1.65;max-width:440px;margin-bottom:28px}
.sug-grid{max-width:720px;gap:10px}
.sug-card{background:transparent;border:1px solid var(--br);border-radius:15px;padding:14px 15px;transition:background .16s,border-color .16s,transform .16s}
.sug-card:hover{background:var(--bg2);border-color:var(--brL);transform:translateY(-1px)}
.sug-txt{color:var(--txt2);line-height:1.45}
.msg-row{max-width:100%}
.msg-row.user .msg-bubble{background:var(--bg3);border:1px solid var(--br);border-radius:20px;padding:11px 16px;color:var(--txt);max-width:min(86%,680px)}
.msg-row.assistant .msg-bubble{background:transparent;border:0;border-radius:0;padding:5px 0;color:var(--txt);max-width:100%;line-height:1.75}
.msg-wrap{max-width:100%}
.input-area{background:var(--bg);border-top:0;padding:8px 20px 14px}
.input-wrap{max-width:760px;width:100%}
.input-box{background:var(--bg3);border:1px solid var(--br);border-radius:26px;box-shadow:0 2px 9px rgba(0,0,0,.08);padding:9px 12px;transition:border-color .16s,box-shadow .16s}
.input-box:focus-within{border-color:var(--brL);box-shadow:0 0 0 2px var(--accL)}
#msgInput{color:var(--txt);line-height:1.55}
.attach-btn{color:var(--txt2);border-radius:50%}
.attach-btn:hover{background:var(--bgh);color:var(--txt)}
.send-btn{background:var(--txt);color:var(--bg);box-shadow:none}
.send-btn svg{color:var(--bg)}
.send-btn:hover{background:var(--txt);box-shadow:0 2px 8px rgba(0,0,0,.18)}
.footer-note{color:var(--txt3);font-size:11px}
.topbar{background:var(--bg);border-bottom:1px solid var(--br)}
.inner-page{background:var(--bg)}
.set-row,.about-card{border-color:var(--br)}
.set-row:hover,.set-list-btn:hover{background:var(--bg2)}
@media(max-width:768px){
  .welcome{padding:32px 18px 24px}.welcome-title{font-size:26px}
  .sug-grid{grid-template-columns:1fr;max-width:520px}
  .input-area{padding:8px 10px calc(10px + env(safe-area-inset-bottom,0px))}
  .chat-msgs{padding:18px 14px 16px}
}

/* CluserAI neutral interface — visual-only refresh, 2026-10-28 */
html,body,#appPage,.main,.chat-area,.inner-page{background:var(--bg);color:var(--txt)}
.intro-bg,.intro-grid,.auth-bg{display:none;background:none}
.intro-content{max-width:860px;padding:72px 24px 64px}
.intro-logo-wrap{width:64px;height:64px;border-radius:17px;margin:0 auto 24px;box-shadow:none;border:1px solid var(--br);animation:none}
.intro-badge{background:var(--bg3);border:1px solid var(--br);color:var(--txt2);font-size:11px;letter-spacing:.2px;padding:5px 12px;margin-bottom:22px}
.intro-badge span{background:var(--txt3);animation:none}
.intro-title{font-size:clamp(36px,5vw,50px);font-weight:650;letter-spacing:-1.8px;line-height:1.12;margin-bottom:20px}
.intro-title .t1,.intro-title .t2,.intro-stat-num,.auth-brand,.sb-brand,.welcome-title,.about-name{background:none;color:var(--txt);-webkit-text-fill-color:var(--txt);background-clip:initial;-webkit-background-clip:initial}
.intro-sub{font-size:16px;color:var(--txt2);max-width:500px;line-height:1.7;margin-bottom:28px}
.intro-actions{gap:10px;margin-bottom:48px}
.btn-intro-primary,.btn-auth,.save-btn,.opt-chip.sel{background:var(--txt);color:var(--bg);border:1px solid var(--txt);box-shadow:none}
.btn-intro-primary{padding:12px 24px;border-radius:24px;font-size:15px;font-weight:600}
.btn-intro-primary:hover,.btn-auth:hover,.save-btn:hover{background:var(--txt);color:var(--bg);box-shadow:none;filter:brightness(.93);transform:none}
.btn-intro-secondary{padding:12px 24px;border:1px solid var(--brL);border-radius:24px;color:var(--txt);font-size:15px;font-weight:500}
.btn-intro-secondary:hover{background:var(--bg3);border-color:var(--brL);color:var(--txt)}
.intro-features{gap:12px;margin-bottom:40px;max-width:780px}
.intro-feat,.intro-usecase,.intro-testimonial,.intro-cta,.intro-stats{background:var(--bg2);border:1px solid var(--br);box-shadow:none}
.intro-feat{padding:20px;border-radius:16px}
.intro-feat:hover,.intro-usecase:hover{background:var(--bg3);border-color:var(--brL);transform:none;box-shadow:none}
.intro-feat-icon{font-size:24px;margin-bottom:12px}
.intro-feat-title{font-weight:600}
.intro-feat-desc{color:var(--txt2)}
.intro-testimonial-avatar,.user-av,.acct-avatar-wrap{background:var(--bg3);color:var(--txt)}
.intro-usecase-icon{background:var(--bg3)}
.intro-cta{border-radius:20px}
.auth-card{background:var(--bg);border:1px solid var(--br);border-radius:20px;box-shadow:none}
.auth-logo-img,.welcome-logo,.about-logo-img{border:1px solid var(--br);box-shadow:none;filter:none;animation:none}
.auth-brand{font-weight:650}
.btn-auth{font-weight:600;border-radius:22px;padding:12px}
.btn-google{background:transparent;border:1px solid var(--brL);border-radius:22px;font-weight:500}
.btn-google:hover{background:var(--bg3);border-color:var(--brL)}
.sidebar{background:var(--bg2);border-right:1px solid var(--br);padding:0 10px}
.sb-header{padding:18px 8px 14px;border-bottom:0}
.sb-brand{font-size:16px;font-weight:600;letter-spacing:-.025em}
.btn-new{background:transparent;border:1px solid var(--br);border-radius:12px;color:var(--txt);box-shadow:none;font-weight:500}
.btn-new:hover,.sb-nav:hover{background:var(--bg3);border-color:var(--brL);color:var(--txt);box-shadow:none}
.sb-nav.active,.conv-item.active{background:var(--bg3);color:var(--txt)}
.sb-search-input{background:transparent;border:1px solid var(--br);border-radius:10px}
.sb-search-input:focus{border-color:var(--brL);box-shadow:none}
.topbar{background:var(--bg);border-bottom:1px solid var(--br)}
.topbar-title{font-size:15px;font-weight:500}
.chat-area{scrollbar-color:var(--brL) transparent}
.chat-msgs{max-width:820px;padding:30px 22px 22px;gap:20px}
.welcome{max-width:760px;width:100%;padding:44px 24px 34px}
.welcome-logo{width:48px;height:48px;margin-bottom:20px;border-radius:14px}
.welcome-title{font-size:30px;font-weight:600;letter-spacing:-.035em;margin-bottom:10px}
.welcome-sub{max-width:440px;font-size:15px;line-height:1.65;color:var(--txt2);margin-bottom:28px}
.sug-grid{max-width:720px;gap:10px}
.sug-card{background:transparent;border:1px solid var(--br);border-radius:15px;padding:14px 15px;box-shadow:none}
.sug-card:hover{background:var(--bg2);border-color:var(--brL);transform:none;box-shadow:none}
.sug-txt{color:var(--txt2);line-height:1.45}
.msg-row.user .msg-bubble{background:var(--bg3);color:var(--txt);border:1px solid var(--br);border-radius:20px;padding:11px 16px;max-width:min(86%,680px)}
.msg-row.assistant .msg-bubble{background:transparent;color:var(--txt);border:0;border-radius:0;padding:5px 0;max-width:100%;line-height:1.75}
.msg-bubble code:not(pre code){background:var(--bg3);color:var(--txt)}
.input-area{background:var(--bg);border-top:0;padding:8px 20px 14px}
.input-wrap{max-width:760px;width:100%}
.input-box{background:var(--bg3);border:1px solid var(--br);border-radius:28px;padding:10px 12px;box-shadow:none}
.input-box:focus-within{border-color:var(--brL);box-shadow:none}
#msgInput{color:var(--txt);line-height:1.55}
.attach-btn{color:var(--txt2);border-radius:50%}
.attach-btn:hover{background:var(--bgh);color:var(--txt)}
.send-btn{width:36px;height:36px;border-radius:50%;background:var(--txt);color:var(--bg);box-shadow:none}
.send-btn svg{color:var(--bg)}
.send-btn:hover{background:var(--txt);box-shadow:none;transform:none}
.send-btn:disabled{opacity:.4}
.footer-note{font-size:11px;color:var(--txt3)}
.set-row,.about-card{border-color:var(--br)}
.set-row:hover,.set-list-btn:hover{background:var(--bg2)}
.opt-chip.sel{font-weight:600}
.save-btn{border-radius:22px;font-weight:600}
@media(max-width:768px){
  .intro-content{padding:42px 20px 40px}
  .intro-logo-wrap{width:56px;height:56px;border-radius:15px;margin-bottom:20px}
  .intro-title{font-size:36px;letter-spacing:-1.3px}
  .intro-sub{font-size:14px;line-height:1.7;margin-bottom:26px}
  .intro-actions{margin-bottom:32px}
  .intro-features{margin-bottom:20px}
  .intro-feat{padding:16px 18px}
  .welcome{padding:30px 18px 24px}
  .welcome-title{font-size:26px}
  .sug-grid{grid-template-columns:1fr;max-width:520px}
  .input-area{padding:8px 10px calc(10px + env(safe-area-inset-bottom,0px))}
  .chat-msgs{padding:18px 14px 16px}
  .input-box{padding:9px 10px}
}