:root{
  --bg:#ffffff;
  --fg:#0d0d0d;
  --side:#f9f9f9;
  --card:#ffffff;
  --border:#e5e5e5;
  --muted:#8f8f8f;
  --btn:#0d0d0d;
  --btnFg:#ffffff;
  --hover:#ececec;
  --hover2:#f4f4f4;
  --code:#0d0d0d;
  --userMsg:#f4f4f4;
}
[data-theme=dark]{
  --bg:#212121;
  --fg:#ececec;
  --side:#171717;
  --card:#303030;
  --border:#3a3a3a;
  --muted:#9b9b9b;
  --btn:#ffffff;
  --btnFg:#000000;
  --hover:#2a2a2a;
  --hover2:#2e2e2e;
  --code:#0d0d0d;
  --userMsg:#303030;
}
*{box-sizing:border-box;margin:0;padding:0;font-family:'Segoe UI',system-ui,-apple-system,sans-serif}
body{background:var(--bg);color:var(--fg);min-height:100vh;transition:background .2s,color .2s}
.hidden{display:none!important}
button{font-family:inherit}

/* ===== Splash ===== */
#splash{position:fixed;inset:0;background:#ffffff;z-index:100;display:flex;align-items:center;justify-content:center;transition:opacity .6s;cursor:pointer}
#splash img{max-width:340px;width:75%;border-radius:16px}
#splash.fade{opacity:0;pointer-events:none}

/* ===== Auth ===== */
.center-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:24px;padding:32px;box-shadow:0 4px 24px rgba(0,0,0,.06);width:100%;max-width:400px}
.auth-card{text-align:center}
.namewithlogo{width:190px;display:block;margin:0 auto 16px;border-radius:14px}
.namewithlogo.small{width:170px;margin:0 auto 14px}
.namewithlogo.hero{width:240px;margin-bottom:14px}
.tabs{display:flex;gap:6px;background:var(--hover);padding:4px;border-radius:12px;margin-bottom:18px}
.tab{flex:1;padding:9px;border:none;background:transparent;color:var(--muted);border-radius:9px;cursor:pointer;font-weight:600}
.tab.active{background:var(--card);color:var(--fg);box-shadow:0 1px 4px rgba(0,0,0,.08)}
input{width:100%;padding:13px 14px;margin:6px 0;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--fg);outline:none}
input:focus{border-color:var(--muted)}
.primary{background:var(--btn);color:var(--btnFg);border:none;padding:13px 18px;border-radius:12px;cursor:pointer;font-weight:600;width:100%;margin-top:8px;font-size:15px}
.ghost{background:transparent;border:1px solid var(--border);color:var(--fg);padding:9px 12px;border-radius:10px;cursor:pointer;margin-top:6px;width:100%;font-size:14px}
.ghost:hover{background:var(--hover)}
.ghost.danger{border-color:#a33;color:#e55}
[data-theme=dark] .ghost.danger{color:#f88;border-color:#744}
.error{color:#e55;margin-top:8px;min-height:1em}
.google-wrap{margin-top:12px;display:flex;justify-content:center}

.maintenance-card{padding:28px 18px;border:1px dashed var(--border);border-radius:16px;background:var(--card)}
#formWrap.maint-blur{filter:blur(6px);opacity:.5;pointer-events:none;user-select:none}
.maint-icon{display:block;font-size:34px;margin-bottom:8px}
.maintenance-card strong{display:block;font-size:18px}
.maintenance-card p{color:var(--muted);margin-top:4px}

/* ===== Layout ===== */
.layout{display:flex;height:100vh;overflow:hidden}
#overlay{display:none}

/* ===== Sidebar ===== */
#sidebar{width:270px;background:var(--side);border-right:1px solid var(--border);padding:10px;display:flex;flex-direction:column;gap:6px;overflow:hidden;flex-shrink:0}
[dir=rtl] #sidebar{border-right:none;border-left:1px solid var(--border)}
.side-top{display:flex;align-items:center;justify-content:space-between;padding:4px 6px}
.side-logo{height:38px;width:auto;border-radius:8px}
.icon-btn{background:transparent;border:none;color:var(--fg);cursor:pointer;font-size:18px;padding:6px 9px;border-radius:8px}
.icon-btn:hover{background:var(--hover)}
.new-chat-btn{display:flex;align-items:center;gap:8px;background:transparent;border:1px solid var(--border);color:var(--fg);padding:10px 12px;border-radius:12px;cursor:pointer;font-size:14px;font-weight:600;width:100%;transition:.15s}
.new-chat-btn:hover{background:var(--hover)}

.chat-section{margin-top:10px;flex:1;overflow-y:auto;min-height:80px}
.chat-section-label{font-size:12px;color:var(--muted);padding:6px 10px;text-transform:uppercase;letter-spacing:.5px}
.chat-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:12px;cursor:pointer;font-size:14px;color:var(--fg);position:relative;transition:background .12s}
.chat-item:hover{background:var(--hover)}
.chat-item.active{background:var(--hover)}
.chat-item .title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-item .actions{display:none;gap:2px}
.chat-item:hover .actions{display:flex}
.chat-item .actions button{background:transparent;border:none;cursor:pointer;color:var(--muted);font-size:13px;padding:3px 5px;border-radius:6px}
.chat-item .actions button:hover{background:var(--border);color:var(--fg)}
.no-chats{color:var(--muted);font-size:13px;padding:12px 10px;text-align:center}
.spacer{flex:1}

.side-item{display:flex;align-items:center;gap:8px;background:transparent;border:1px solid var(--border);color:var(--fg);padding:10px 12px;border-radius:12px;cursor:pointer;font-size:14px;width:100%;margin-top:4px;flex:1}
.side-item:hover{background:var(--hover)}
.side-row{display:flex;gap:6px;align-items:center}
.side-row .icon-btn{border:1px solid var(--border);border-radius:12px;padding:10px 12px}
.side-row .icon-btn:hover{background:var(--hover)}

.account-row{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:12px;cursor:pointer;border:1px solid transparent}
.account-row:hover{background:var(--hover);border-color:var(--border)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--btn);color:var(--btnFg);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0;text-transform:uppercase}
.avatar.big{width:64px;height:64px;font-size:26px;margin:0 auto 10px}
.account-info{display:flex;flex-direction:column;overflow:hidden;flex:1}
.account-info span{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.account-info small{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chevron{color:var(--muted)}

/* ===== Main ===== */
main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative;background:var(--bg)}
header{display:flex;align-items:center;gap:10px;padding:10px 16px;position:sticky;top:0;background:var(--bg);z-index:5}
header h2{font-size:16px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{background:var(--hover);color:var(--fg);padding:4px 10px;border-radius:999px;font-size:12px;border:1px solid var(--border);white-space:nowrap}

/* Empty state (ChatGPT style, composer centered) */
#emptyState{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 20px;text-align:center;gap:8px}
#emptyState .hero-group{display:flex;flex-direction:column;align-items:center;gap:6px;width:100%;max-width:760px}
#emptyState p{color:var(--muted);font-size:22px;margin-bottom:14px}
#emptyState .composer-wrap{width:100%}

/* Messages (ChatGPT style) */
#messages{flex:1;overflow-y:auto;padding:12px 0 20px}
.msg-row{display:flex;gap:14px;padding:14px 20px;max-width:820px;margin:0 auto;width:100%}
.msg-row.user{justify-content:flex-end}
.msg{line-height:1.7;font-size:15.5px;max-width:100%}
.msg.user{background:var(--userMsg);padding:10px 16px;border-radius:20px;max-width:75%}
.msg.assistant{background:transparent;padding:0}
.msg pre{direction:ltr;text-align:left;background:var(--code);color:#ececec;padding:14px;border-radius:12px;overflow-x:auto;position:relative;margin:12px 0}
.msg img{max-width:340px;border-radius:14px}
.msg p{margin:0 0 10px}
.msg p:last-child{margin-bottom:0}
.msg ul,.msg ol{padding-inline-start:22px;margin:8px 0}
.msg code{background:var(--hover);padding:2px 5px;border-radius:5px;font-size:13.5px}
.msg pre code{background:none;padding:0}
.code-actions{position:absolute;top:8px;inset-inline-end:8px;display:flex;gap:6px}
.copy-btn,.preview-btn{background:#2f2f2f;color:#fff;border:none;border-radius:6px;padding:5px 9px;cursor:pointer;font-size:12px}
.copy-btn:hover,.preview-btn:hover{background:#444}

/* Thinking indicator + stop */
.thinking-row{padding-top:16px}
.thinking{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:15px}
.tdots{display:inline-flex;gap:4px;align-items:center}
.tdots i{width:7px;height:7px;border-radius:50%;background:var(--fg);opacity:.35;animation:tdot 1.2s infinite ease-in-out}
.tdots i:nth-child(2){animation-delay:.2s}
.tdots i:nth-child(3){animation-delay:.4s}
@keyframes tdot{0%,80%,100%{opacity:.2;transform:scale(.8)}40%{opacity:1;transform:scale(1.15)}}
.tlabel{font-weight:500}
.stop-btn{width:32px;height:32px;border-radius:50%;border:1px solid var(--border);background:var(--card);color:var(--fg);cursor:pointer;font-size:12px;display:flex;align-items:center;justify-content:center;transition:.15s}
.stop-btn:hover{background:var(--hover);transform:scale(1.06)}

/* Composer */
.composer-wrap{padding:8px 20px 14px;max-width:820px;width:100%;margin:0 auto}
.composer{display:flex;gap:6px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:28px;padding:6px 8px;box-shadow:0 2px 14px rgba(0,0,0,.08)}
.composer input{flex:1;border:none;background:transparent;margin:0;padding:11px 8px;font-size:15.5px}
.composer input:focus{border:none}
.icon-btn.plus{font-size:20px;border:1px solid var(--border);border-radius:50%;width:36px;height:36px;padding:0;display:flex;align-items:center;justify-content:center}
.send-btn{background:var(--btn);color:var(--btnFg);border:none;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:17px;display:flex;align-items:center;justify-content:center;transition:.15s}
.send-btn:disabled{opacity:.4;cursor:default}
.composer-hint{text-align:center;font-size:11.5px;color:var(--muted);margin-top:8px}
.attach-preview{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.attach-preview.hidden{display:none}
.chip{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:6px 10px;font-size:13px;max-width:220px}
.chip img{width:34px;height:34px;object-fit:cover;border-radius:8px}
.chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip button{background:none;border:none;color:var(--muted);cursor:pointer;font-size:14px;padding:2px 4px;border-radius:6px}
.chip button:hover{background:var(--hover);color:var(--fg)}
.icon-btn.plus{position:relative;overflow:hidden}
#fileInput{display:none}

/* ===== Account modal ===== */
.account-body{max-width:440px;position:relative}
.field-label{display:block;text-align:start;font-size:13px;color:var(--muted);margin-top:12px}
.muted-p{color:var(--muted);font-size:14px;margin-bottom:14px}
.acct-plan{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--border);border-radius:12px;padding:10px 14px;margin-bottom:6px}
.acct-plan span{font-weight:700;letter-spacing:1px}
.acct-plan small{color:var(--muted)}
.acct-actions{display:flex;flex-direction:column;gap:2px;margin-top:14px}
.close-x{position:absolute;top:10px;inset-inline-end:10px;width:auto;padding:6px 10px;margin-top:0}

/* ===== Modals ===== */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}
.modal-body{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:26px;max-width:560px;width:100%;text-align:center;color:var(--fg);max-height:90vh;overflow-y:auto}
.modal-body.wide{max-width:900px}
.plans{display:flex;gap:12px;margin:16px 0;flex-wrap:wrap}
.plan{flex:1;border:1px solid var(--border);border-radius:14px;padding:18px;min-width:200px}
.plan.highlight{border:2px solid var(--btn)}
/* ===== Payment ===== */
.payment-body{max-width:460px;position:relative}
.pay-methods{display:flex;gap:10px;justify-content:center;margin:6px 0 16px}
.pay-method{display:flex;align-items:center;justify-content:center;gap:6px;background:transparent;border:1.5px solid var(--border);border-radius:12px;padding:10px 22px;cursor:pointer;color:var(--fg);transition:.15s}
.pay-method:hover{background:var(--hover)}
.pay-method.active{border-color:var(--fg);background:var(--hover)}
.card-area{position:relative;margin-bottom:6px}
.card-form{filter:blur(7px);opacity:.55;pointer-events:none;user-select:none;transition:.2s}
.card-row{display:flex;gap:10px}
.card-row>div{flex:1}
.coming-soon{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;pointer-events:none}
.coming-soon span{font-size:30px}
.coming-soon strong{font-size:24px;letter-spacing:2px;text-transform:uppercase;background:var(--bg);border:1px solid var(--border);padding:8px 22px;border-radius:14px}
.coming-soon small{font-size:16px;color:var(--muted);background:var(--bg);padding:3px 12px;border-radius:10px;border:1px solid var(--border)}
.primary:disabled{opacity:.55;cursor:not-allowed}
.pay-note,.muted-p.pay-note{font-size:13px}
#previewFrame{width:100%;height:55vh;border:1px solid var(--border);border-radius:12px;background:#fff}

/* ===== Responsive ===== */
@media(max-width:768px){
  #sidebar{position:fixed;inset:0 auto 0 0;z-index:40;transform:translateX(-102%);transition:.25s}
  [dir=rtl] #sidebar{inset:0 0 0 auto;transform:translateX(102%)}
  #sidebar.open{transform:none}
  #overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:35}
  #overlay.show{display:block}
  .only-mobile{display:inline-flex!important;align-items:center}
  .msg.user{max-width:88%}
  .namewithlogo.hero{width:200px}
  .msg-row{padding:12px 14px}
}
@media(min-width:769px){.only-mobile{display:none!important}}

/* ===== Landing page ===== */
.landing{min-height:100vh;overflow-y:auto}
.lp-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:18px;padding:12px 26px;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.lp-nav-logo{height:30px;border-radius:6px}
.lp-links{display:flex;gap:22px;flex:1;justify-content:center}
.lp-links a{color:var(--muted);text-decoration:none;font-size:14.5px;transition:.15s}
.lp-links a:hover{color:var(--fg)}
.lp-nav-btns{display:flex;gap:10px;align-items:center}
.ghost-btn{background:transparent;border:1px solid var(--border);color:var(--fg);border-radius:10px;padding:9px 16px;font-size:14.5px;font-weight:500;cursor:pointer;transition:.15s}
.ghost-btn:hover{background:var(--hover)}
.back-btn{position:absolute;top:14px;left:14px;background:none;border:none;color:var(--muted);font-size:20px;cursor:pointer;padding:6px 10px;border-radius:8px;transition:.15s}
.back-btn:hover{background:var(--hover);color:var(--fg)}
.lp-hero{text-align:center;padding:64px 20px 70px;max-width:760px;margin:0 auto}
.lp-hero-gif{display:inline-block;background:#fff;border:1px solid var(--border);border-radius:18px;padding:10px 16px;margin-bottom:26px}
.lp-hero-gif img{height:120px;display:block;border-radius:10px}
.lp-hero-logo{height:64px;border-radius:12px;margin-bottom:14px}
.lp-hero h1{font-size:44px;letter-spacing:-1px;margin:6px 0 14px}
.lp-hero-sub{color:var(--muted);font-size:18px;line-height:1.6;margin:0 auto 30px;max-width:560px}
.lp-hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.lp-hero-cta .primary{padding:14px 30px;font-size:16px;border-radius:12px}
.lp-hero-cta .ghost-btn{padding:14px 26px;font-size:16px;border-radius:12px}
.lp-section{max-width:1020px;margin:0 auto;padding:56px 22px}
.lp-section h2{text-align:center;font-size:30px;margin-bottom:36px;letter-spacing:-.5px}
.lp-alt{background:var(--card);border-block:1px solid var(--border);max-width:100%}
.lp-alt h2,.lp-alt .lp-plans{max-width:1020px;margin-inline:auto}
.lp-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.lp-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px 22px;transition:.18s}
.lp-card:hover{transform:translateY(-3px);border-color:var(--fg)}
.lp-card span{font-size:30px}
.lp-card h3{margin:14px 0 8px;font-size:17.5px}
.lp-card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.6}
.lp-plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px;max-width:720px}
.lp-plan{position:relative;background:var(--bg);border:1px solid var(--border);border-radius:18px;padding:28px 24px;display:flex;flex-direction:column}
.lp-plan-pro{border:2px solid var(--fg)}
.lp-badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--fg);color:var(--bg);font-size:12px;font-weight:700;padding:5px 14px;border-radius:20px}
.lp-plan h3{font-size:19px;margin:4px 0 6px}
.lp-price{font-size:34px;font-weight:700;margin-bottom:16px}
.lp-plan ul{list-style:none;padding:0;margin:0 0 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.lp-plan li{font-size:14.5px;color:var(--muted);padding-left:24px;position:relative}
.lp-plan li::before{content:'?';position:absolute;left:0;color:var(--fg);font-weight:700}
.lp-plan-cta{width:100%;padding:12px;font-size:15px;border-radius:11px}
.dev-card{max-width:440px;margin:0 auto;text-align:center;background:var(--card);border:1px solid var(--border);border-radius:20px;padding:34px 26px}
.dev-avatar{width:84px;height:84px;border-radius:50%;background:var(--fg);color:var(--bg);display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:700;margin:0 auto 16px}
.dev-card h3{margin:0 0 6px;font-size:21px}
.dev-role{color:var(--fg);font-weight:600;margin:0 0 4px;font-size:15px}
.dev-loc{color:var(--muted);margin:0;font-size:14.5px}
.dev-team{text-align:center;color:var(--muted);font-size:14px;margin-top:22px}
.lp-footer{text-align:center;color:var(--muted);font-size:13.5px;padding:26px 20px 34px;border-top:1px solid var(--border)}
@media(max-width:768px){
  .lp-links{display:none}
  .lp-hero h1{font-size:32px}
  .lp-hero{padding-top:38px}
  .lp-hero-gif img{height:86px}
  .lp-hero-logo{height:46px}
}

/* ===== OTP verification ===== */
.otp-info{text-align:center;color:var(--muted);font-size:14.5px;margin:8px 0 4px}
.otp-email{text-align:center;font-weight:600;font-size:14.5px;margin:0 0 14px;word-break:break-all}
.otp-input{text-align:center;font-size:28px;letter-spacing:14px;font-weight:700;padding:14px;direction:ltr}
.otp-input::placeholder{color:var(--muted);opacity:.5;letter-spacing:10px}
#otpVerify{width:100%;margin-top:12px;padding:12px}
.otp-row{display:flex;gap:10px;margin-top:10px}
.otp-row .ghost-btn{flex:1;padding:10px;font-size:14px}

/* ===== Avatar with Google picture ===== */
.av-img{width:100%;height:100%;object-fit:cover;border-radius:50%;display:block}