*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#172033}body{background:#f5f7fb}a{color:inherit}button,input,textarea{font:inherit}.auth-page{min-height:100vh;background:radial-gradient(circle at 20% 10%,#dfe8ff 0,transparent 32%),radial-gradient(circle at 85% 85%,#ffe7d2 0,transparent 32%),#f7f9fc;overflow-x:hidden}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:28px}.glass-card{background:rgba(255,255,255,.9);backdrop-filter:blur(18px);border:1px solid rgba(255,255,255,.72);box-shadow:0 24px 70px rgba(33,51,99,.14);border-radius:28px}.brand-badge{width:68px;height:68px;border-radius:20px;display:grid;place-items:center;margin:0 auto 20px;background:linear-gradient(135deg,#3457f1,#7548ee);color:#fff;font-weight:800;letter-spacing:.08em;box-shadow:0 12px 30px rgba(62,79,214,.28)}.brand-badge.small{width:42px;height:42px;border-radius:13px;margin:0;font-size:12px}.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:800;color:#5d6fa8;margin-bottom:10px}.auth-card{width:min(720px,100%);padding:34px}.auth-card h1{font-size:34px;line-height:1.08;margin:8px 0 10px;color:#111a2c}.account-helper{color:#778195;font-size:14px;margin:0 0 8px}.back-link{display:inline-block;margin-bottom:18px;text-decoration:none;color:#6d7890}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;background:#eef2f8;border-radius:14px;padding:5px;margin-bottom:26px}.auth-tabs a{text-align:center;text-decoration:none;padding:11px;border-radius:10px;font-weight:750;color:#707a8f}.auth-tabs a.active{background:#fff;color:#3148b6;box-shadow:0 5px 14px rgba(29,45,99,.08)}.form-stack,.form-grid{display:grid;gap:16px;margin-top:22px}.form-grid{grid-template-columns:1fr 1fr}.span-2{grid-column:1/-1}label{display:grid;gap:8px;font-size:13px;font-weight:750;color:#4e596e}.optional{font-weight:500;color:#8a93a6}input,textarea{width:100%;border:1px solid #dfe4ee;background:#fff;border-radius:13px;padding:13px 14px;outline:0;transition:border .2s,box-shadow .2s;color:#162034}input:focus,textarea:focus{border-color:#6177f2;box-shadow:0 0 0 4px rgba(81,103,237,.1)}.password-wrap{position:relative}.password-wrap input{padding-right:72px}.icon-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:0;background:#edf1f8;color:#53617a;border-radius:9px;padding:7px 10px;font-size:12px;cursor:pointer}.strength{height:5px;background:#edf0f6;border-radius:20px;overflow:hidden}.strength span{height:100%;width:0;display:block;background:linear-gradient(90deg,#ef476f,#f7b32b,#2ec4b6);transition:.2s}.alert{padding:12px 14px;border-radius:12px;margin:12px 0;font-size:14px}.alert.error{background:#fff0f2;color:#a32943;border:1px solid #ffd4dc}.auth-switch{text-align:center;color:#778198;font-size:14px;margin:20px 0 0}.auth-switch a{color:#4059d8;font-weight:800}.btn{border:0;border-radius:14px;padding:14px 20px;text-decoration:none;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:.2s transform,.2s box-shadow}.btn:hover{transform:translateY(-2px)}.btn-primary{background:linear-gradient(135deg,#3457f1,#6a45e8);color:#fff;box-shadow:0 12px 26px rgba(68,79,223,.24)}.btn.full{width:100%}.chat-page{height:100vh;overflow:hidden;background:#eef2f7}.chat-app{display:grid;grid-template-columns:290px 1fr;height:100vh}.chat-sidebar{background:#111827;color:#fff;padding:22px 18px;display:flex;flex-direction:column;justify-content:space-between;border-right:1px solid rgba(255,255,255,.06)}.brand-lockup{display:flex;gap:12px;align-items:center;margin-bottom:24px}.brand-lockup strong,.brand-lockup span{display:block}.brand-lockup strong{font-size:14px}.brand-lockup span{font-size:11px;color:#9aa6bd;margin-top:2px}.new-chat-btn{width:100%;border:1px solid #2a3850;background:#192335;color:#fff;border-radius:12px;padding:12px;text-align:left;cursor:pointer;font-weight:700}.sidebar-section{margin-top:26px}.sidebar-label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:#6f7e98;margin:0 4px 10px}.topic-chip{width:100%;text-align:left;border:0;background:transparent;color:#cbd4e4;padding:10px;border-radius:10px;cursor:pointer}.topic-chip:hover{background:#1b2639;color:#fff}.sidebar-user{display:flex;align-items:center;gap:10px;padding-top:14px;border-top:1px solid #263249}.avatar{width:38px;height:38px;border-radius:12px;background:#4355dc;display:grid;place-items:center;font-weight:900}.user-meta{min-width:0;flex:1}.user-meta strong,.user-meta span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-meta strong{font-size:13px}.user-meta span{font-size:11px;color:#8e9bb2;margin-top:2px}.logout-mini{text-decoration:none;color:#93a1b7}.chat-main{min-width:0;background:#f7f9fc;display:grid;grid-template-rows:70px 1fr auto}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid #e5e9f1;background:rgba(255,255,255,.88);backdrop-filter:blur(12px)}.chat-header>div strong{display:block;font-size:14px}.online{font-size:11px;color:#718099}.online i{display:inline-block;width:7px;height:7px;background:#31c48d;border-radius:50%;margin-right:5px}.header-actions{display:flex;align-items:center;gap:10px}.header-account-link{text-decoration:none;font-size:13px;font-weight:800;color:#4057df;padding:8px 12px;border-radius:10px}.header-account-link:hover{background:#eef1ff}.logged-in-label{font-size:12px;color:#738097}.mobile-menu,.theme-toggle{border:0;background:#edf1f6;border-radius:10px;width:38px;height:38px;cursor:pointer}.mobile-menu{display:none}.messages{overflow-y:auto;padding:28px clamp(18px,4vw,60px);scroll-behavior:smooth}.welcome-panel{max-width:850px;margin:7vh auto 0;text-align:center}.bot-orb{width:66px;height:66px;border-radius:22px;margin:0 auto 18px;display:grid;place-items:center;background:linear-gradient(135deg,#4057e8,#8357ef);color:#fff;font-size:28px;box-shadow:0 15px 34px rgba(71,80,216,.25)}.welcome-panel h1{font-size:36px;margin:0 0 10px}.welcome-panel>p{color:#778195;margin:0}.guest-counter,.unlimited-badge{margin:14px auto 0;display:inline-block;background:#eef1ff;color:#4057df;padding:8px 14px;border-radius:999px;font-size:12px;font-weight:800}.unlimited-badge{background:#eafaf3;color:#25845d}.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:30px}.quick-grid button{padding:18px;border:1px solid #e3e7ef;background:#fff;border-radius:16px;text-align:left;cursor:pointer;transition:.2s}.quick-grid button:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(40,50,90,.08)}.quick-grid span{font-size:22px}.quick-grid strong,.quick-grid small{display:block}.quick-grid strong{margin-top:9px}.quick-grid small{color:#8a94a8;margin-top:4px}.message-row{max-width:900px;margin:0 auto 18px;display:flex;gap:10px;align-items:flex-start}.message-row.user{justify-content:flex-end}.message-row.bot{justify-content:flex-start}.message-bubble{max-width:min(76%,720px);padding:14px 16px;border-radius:18px;line-height:1.55;font-size:14px;white-space:pre-wrap;box-shadow:0 7px 18px rgba(35,48,85,.05)}.message-row.user .message-bubble{background:#4357df;color:#fff;border-bottom-right-radius:6px}.message-row.bot .message-bubble{background:#fff;color:#253047;border:1px solid #e5e9f1;border-bottom-left-radius:6px}.message-avatar{width:32px;height:32px;border-radius:10px;background:#e8ebff;color:#4557d8;display:grid;place-items:center;font-size:14px;font-weight:900}.typing{display:inline-flex;gap:4px;align-items:center}.typing i{width:6px;height:6px;border-radius:50%;background:#9aa4b6;animation:bounce 1s infinite}.typing i:nth-child(2){animation-delay:.14s}.typing i:nth-child(3){animation-delay:.28s}@keyframes bounce{0%,80%,100%{transform:translateY(0);opacity:.5}40%{transform:translateY(-5px);opacity:1}}.composer-wrap{padding:10px clamp(18px,4vw,60px) 18px;background:#f7f9fc}.composer{max-width:900px;margin:0 auto;display:grid;grid-template-columns:42px 1fr 46px;align-items:end;gap:8px;background:#fff;border:1px solid #dfe4ed;border-radius:18px;padding:8px;box-shadow:0 13px 35px rgba(30,43,80,.09)}.composer textarea{border:0;box-shadow:none;padding:10px 4px;resize:none;max-height:130px;background:transparent}.composer textarea:focus{box-shadow:none}.composer-icon,.send-btn{border:0;border-radius:12px;height:42px;cursor:pointer}.composer-icon{background:#f0f3f8}.send-btn{background:#4057df;color:#fff;font-size:18px}.composer-meta{max-width:900px;margin:6px auto 0;display:flex;justify-content:space-between;font-size:10px;color:#98a1b0;padding:0 5px}.suggestions{max-width:900px;margin:0 auto 8px;display:flex;gap:7px;overflow-x:auto}.suggestions button{white-space:nowrap;border:1px solid #dee4ee;background:#fff;border-radius:999px;padding:8px 11px;font-size:11px;color:#59667d;cursor:pointer}.suggestions button:hover{border-color:#7282ec;color:#4057df}body.dark .chat-main,body.dark .composer-wrap{background:#0f1724}body.dark .chat-header{background:#151f2e;border-color:#253044;color:#f5f7fb}body.dark .messages{color:#f5f7fb}body.dark .welcome-panel>p{color:#98a5b8}body.dark .quick-grid button,body.dark .message-row.bot .message-bubble,body.dark .composer,body.dark .suggestions button{background:#182231;border-color:#28364a;color:#e8edf6}body.dark .composer textarea{color:#e8edf6}body.dark .composer textarea::placeholder{color:#79879d}body.dark .theme-toggle{background:#263248;color:#fff}body.dark .header-account-link{color:#aeb9ff}body.dark .header-account-link:hover{background:#253044}@media(max-width:840px){.chat-app{grid-template-columns:1fr}.chat-sidebar{position:fixed;left:-300px;top:0;bottom:0;width:280px;z-index:20;transition:.25s}.chat-sidebar.open{left:0}.mobile-menu{display:inline-grid;place-items:center}.form-grid{grid-template-columns:1fr}.span-2{grid-column:auto}.quick-grid{grid-template-columns:1fr}.message-bubble{max-width:86%}.logged-in-label{display:none}}@media(max-width:560px){.auth-wrap{padding:16px}.auth-card{padding:24px 18px}.chat-header{padding:0 12px}.header-account-link{font-size:12px;padding:7px 8px}.messages{padding:20px 14px}.composer-wrap{padding:8px 12px 12px}.welcome-panel{margin-top:3vh}.welcome-panel h1{font-size:28px}.composer-meta span:first-child{display:none}}


/* =========================================================
   SCROLLBAR SUPPORT
   ========================================================= */

html,
body {
    height: 100%;
}

.auth-page {
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto !important;
}

.auth-wrap {
    min-height: 100vh;
    max-height: 100vh;
    overflow-y: auto;
    padding-top: 28px;
    padding-bottom: 28px;
}

.auth-card {
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    overflow-x: hidden;
}

.chat-page {
    height: 100vh;
    overflow: hidden;
}

.chat-app {
    height: 100vh;
    overflow: hidden;
}

.chat-main {
    min-height: 0;
    overflow: hidden;
}

.messages {
    min-height: 0;
    overflow-y: scroll !important;
    overflow-x: hidden;
    scrollbar-gutter: stable;
}

.chat-sidebar {
    overflow-y: auto;
    overflow-x: hidden;
}

.suggestions {
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
}

/* Chrome / Edge / Safari */
.auth-wrap::-webkit-scrollbar,
.auth-card::-webkit-scrollbar,
.messages::-webkit-scrollbar,
.chat-sidebar::-webkit-scrollbar {
    width: 8px;
}

.suggestions::-webkit-scrollbar {
    height: 7px;
}

.auth-wrap::-webkit-scrollbar-track,
.auth-card::-webkit-scrollbar-track,
.messages::-webkit-scrollbar-track,
.chat-sidebar::-webkit-scrollbar-track,
.suggestions::-webkit-scrollbar-track {
    background: #eef1f6;
    border-radius: 20px;
}

.auth-wrap::-webkit-scrollbar-thumb,
.auth-card::-webkit-scrollbar-thumb,
.messages::-webkit-scrollbar-thumb,
.chat-sidebar::-webkit-scrollbar-thumb,
.suggestions::-webkit-scrollbar-thumb {
    background: #aeb7c8;
    border-radius: 20px;
}

.auth-wrap::-webkit-scrollbar-thumb:hover,
.auth-card::-webkit-scrollbar-thumb:hover,
.messages::-webkit-scrollbar-thumb:hover,
.chat-sidebar::-webkit-scrollbar-thumb:hover,
.suggestions::-webkit-scrollbar-thumb:hover {
    background: #7f8ba1;
}

/* Firefox */
.auth-wrap,
.auth-card,
.messages,
.chat-sidebar,
.suggestions {
    scrollbar-width: thin;
    scrollbar-color: #aeb7c8 #eef1f6;
}

/* Dark mode */
body.dark .messages::-webkit-scrollbar-track,
body.dark .chat-sidebar::-webkit-scrollbar-track,
body.dark .suggestions::-webkit-scrollbar-track {
    background: #172131;
}

body.dark .messages::-webkit-scrollbar-thumb,
body.dark .chat-sidebar::-webkit-scrollbar-thumb,
body.dark .suggestions::-webkit-scrollbar-thumb {
    background: #4b5a70;
}

@media (max-width: 560px) {
    .auth-wrap {
        padding-top: 16px;
        padding-bottom: 16px;
    }

    .auth-card {
        max-height: calc(100vh - 32px);
    }

    .messages {
        overflow-y: scroll !important;
    }
}