*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #050B18;
  --bg2: #080F1F;
  --card: #0C1628;
  --card2: #101E38;
  --glass: rgba(12,22,40,0.8);
  --blue: #2563EB;
  --blue-b: #3B82F6;
  --blue-g: rgba(37,99,235,0.15);
  --blue-br: rgba(59,130,246,0.3);
  --gold: #C9A84C;
  --gold-l: #E2C27A;
  --gold-g: rgba(201,168,76,0.12);
  --t1: #EEF2FF;
  --t2: #8AA0C8;
  --t3: #4A6080;
  --bd: rgba(255,255,255,0.06);
  --bd2: rgba(255,255,255,0.03);
  --r: 12px;
  --r2: 20px;
  --nav: 66px;
  --ff: 'Inter', system-ui, sans-serif;
  --fs: 'Playfair Display', Georgia, serif;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--ff); background: var(--bg); color: var(--t1); line-height: 1.6; -webkit-font-smoothing: antialiased; min-height: 100vh; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--ff); cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: var(--ff); outline: none; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--card2); border-radius: 3px; }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 24px; border-radius: 10px; font-size: 14px; font-weight: 500; letter-spacing: .01em; transition: all .2s; white-space: nowrap; cursor: pointer; border: none; font-family: var(--ff); }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 2px 16px rgba(37,99,235,.35); }
.btn-primary:hover { background: var(--blue-b); box-shadow: 0 4px 24px rgba(37,99,235,.5); transform: translateY(-1px); }
.btn-gold { background: linear-gradient(135deg, #C9A84C, #E2C27A); color: #050B18; font-weight: 600; box-shadow: 0 2px 16px rgba(201,168,76,.3); }
.btn-gold:hover { box-shadow: 0 4px 28px rgba(201,168,76,.45); transform: translateY(-1px); }
.btn-ghost { background: rgba(255,255,255,.04); color: var(--t2); border: 1px solid var(--bd) !important; }
.btn-ghost:hover { background: rgba(255,255,255,.08); color: var(--t1); }
.btn-outline { background: transparent; color: var(--blue-b); border: 1px solid var(--blue-br) !important; }
.btn-outline:hover { background: var(--blue-g); }

/* NAV */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: var(--nav); display: flex; align-items: center; padding: 0 32px; gap: 32px; transition: all .3s; }
.nav.scrolled { background: rgba(5,11,24,.93); backdrop-filter: blur(20px); border-bottom: 1px solid var(--bd); }
.nav.solid { background: rgba(5,11,24,.93); backdrop-filter: blur(20px); border-bottom: 1px solid var(--bd); }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 32px; height: 32px; background: linear-gradient(135deg,#2563EB,#4F8EF7); border-radius: 9px; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700; color: #fff; box-shadow: 0 2px 12px rgba(37,99,235,.4); flex-shrink: 0; }
.logo-text { font-size: 18px; font-weight: 600; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-link { padding: 6px 14px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--t2); transition: all .15s; }
.nav-link:hover, .nav-link.active { color: var(--t1); background: rgba(255,255,255,.04); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.token-badge { display: flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 20px; background: var(--gold-g); border: 1px solid rgba(201,168,76,.2); font-size: 12px; font-weight: 600; color: var(--gold-l); }
.token-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg,#2563EB,#7C3AED); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; color: #fff; flex-shrink: 0; }

/* TAGS */
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 100px; font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.tag-blue { background: var(--blue-g); color: var(--blue-b); border: 1px solid var(--blue-br); }
.tag-gold { background: var(--gold-g); color: var(--gold-l); border: 1px solid rgba(201,168,76,.25); }

/* CARDS */
.card { background: var(--card); border: 1px solid var(--bd); border-radius: var(--r2); }
.card:hover { background: var(--card2); }

/* UTILS */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.gradient-text { background: linear-gradient(135deg,#fff 0%,var(--blue-b) 50%,var(--gold-l) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gold-text { background: linear-gradient(135deg,#C9A84C,#E2C27A); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ANIMATIONS */
@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
@keyframes bounce { 0%,80%,100% { transform:scale(.6); opacity:.4; } 40% { transform:scale(1); opacity:1; } }
@keyframes spin { to { transform:rotate(360deg); } }
@keyframes pulse-line { 0%,100% { opacity:.4; transform:scaleY(.8); } 50% { opacity:1; transform:scaleY(1); } }
.au1 { animation: fadeUp .7s ease both; }
.au2 { animation: fadeUp .7s .1s ease both; }
.au3 { animation: fadeUp .7s .2s ease both; }
.au4 { animation: fadeUp .7s .3s ease both; }
.au5 { animation: fadeUp .7s .4s ease both; }

/* INPUT */
.inp { width:100%; padding:12px 16px; background:rgba(255,255,255,.04); border:1px solid var(--bd); border-radius:10px; color:var(--t1); font-size:14px; transition:border-color .15s; }
.inp:focus { border-color: var(--blue-br); }
.inp::placeholder { color: var(--t3); }

/* CHAT specific */
.chat-wrap { display:flex; height:100vh; overflow:hidden; }
.chat-sidebar { width:260px; flex-shrink:0; display:flex; flex-direction:column; background:var(--bg2); border-right:1px solid var(--bd); transition:width .25s; overflow:hidden; }
.chat-sidebar.collapsed { width:0; }
.chat-main { flex:1; display:flex; flex-direction:column; overflow:hidden; min-width:0; }
.chat-topbar { height:56px; flex-shrink:0; display:flex; align-items:center; padding:0 16px; gap:12px; border-bottom:1px solid var(--bd); background:rgba(8,15,31,.92); backdrop-filter:blur(12px); }
.chat-messages { flex:1; overflow:auto; padding:24px 0; }
.chat-input-wrap { flex-shrink:0; padding:16px 24px 20px; border-top:1px solid var(--bd); background:rgba(8,15,31,.95); backdrop-filter:blur(12px); }
.msg-box { display:flex; gap:12px; margin-bottom:24px; align-items:flex-start; }
.msg-box.user { flex-direction:row-reverse; }
.msg-avatar { width:32px; height:32px; border-radius:50%; flex-shrink:0; display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:600; color:#fff; border:1px solid var(--bd); }
.msg-avatar.ai { background:linear-gradient(135deg,#1E293B,#334155); font-size:14px; }
.msg-avatar.user { background:linear-gradient(135deg,#2563EB,#7C3AED); }
.msg-bubble { max-width:78%; padding:12px 16px; font-size:14px; line-height:1.65; }
.msg-bubble.user { background:var(--blue); border-radius:16px 4px 16px 16px; color:#fff; }
.msg-bubble.ai { background:var(--card); border:1px solid var(--bd); border-radius:4px 16px 16px 16px; color:var(--t1); }
.input-bar { display:flex; align-items:flex-end; gap:10px; background:var(--card); border:1px solid var(--bd); border-radius:14px; padding:10px 12px; }
.input-bar:focus-within { border-color: var(--blue-br); }
.input-bar textarea { flex:1; background:none; border:none; color:var(--t1); font-size:14px; resize:none; line-height:1.6; max-height:200px; overflow:auto; padding:6px 0; font-family:var(--ff); }
.input-bar textarea::placeholder { color:var(--t3); }
.icon-btn { width:34px; height:34px; border-radius:8px; background:rgba(255,255,255,.05); border:1px solid var(--bd); color:var(--t2); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; flex-shrink:0; transition:all .15s; }
.icon-btn:hover { background:rgba(255,255,255,.1); color:var(--t1); }
.send-btn { width:34px; height:34px; border-radius:8px; border:none; color:#fff; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:16px; flex-shrink:0; transition:background .2s; }
.mode-btn { display:flex; align-items:center; gap:8px; padding:6px 14px; border-radius:9px; background:var(--card); border:1px solid var(--bd); color:var(--t1); font-size:13px; font-weight:500; cursor:pointer; }
.mode-dropdown { position:absolute; top:100%; left:0; margin-top:4px; background:var(--card); border:1px solid var(--bd); border-radius:12px; padding:6px; z-index:50; min-width:240px; box-shadow:0 8px 32px rgba(0,0,0,.4); display:none; }
.mode-dropdown.open { display:block; }
.mode-option { width:100%; padding:10px 12px; border-radius:8px; background:transparent; border:none; cursor:pointer; display:flex; align-items:center; gap:10px; text-align:left; transition:background .15s; }
.mode-option:hover, .mode-option.active { background:var(--card2); }
.token-bar-wrap { height:4px; background:var(--card); border-radius:2px; overflow:hidden; }
.token-bar-fill { height:100%; background:linear-gradient(to right,var(--blue),var(--gold)); border-radius:2px; transition:width .5s; }

/* Excel sidebar */
.excel-sb { width:360px; flex-shrink:0; display:flex; flex-direction:column; background:var(--bg2); border-left:1px solid var(--bd); overflow:hidden; }
.excel-table { width:100%; border-collapse:collapse; font-size:12px; }
.excel-table th, .excel-table td { padding:7px 10px; border-right:1px solid var(--bd); border-bottom:1px solid rgba(255,255,255,.03); text-align:left; white-space:nowrap; }
.excel-table thead tr:first-child th { background:rgba(255,255,255,.03); color:var(--t3); font-size:11px; }
.excel-table thead tr:last-child td { background:rgba(167,139,250,.08); color:#A78BFA; font-weight:600; border-bottom:2px solid rgba(167,139,250,.2); }
.excel-table tbody tr:nth-child(even) { background:rgba(255,255,255,.015); }

/* PRICING */
.plan-card { background:var(--card); border:1px solid var(--bd); border-radius:var(--r2); padding:32px 28px; transition:all .25s; }
.plan-card.highlight { background:linear-gradient(160deg,rgba(37,99,235,.14) 0%,var(--card) 60%); border-color:var(--blue-br); transform:scale(1.02); box-shadow:0 8px 48px rgba(37,99,235,.15); }
.plan-card:hover:not(.highlight) { transform:translateY(-2px); box-shadow:0 8px 32px rgba(0,0,0,.3); }
.check-list { list-style:none; display:flex; flex-direction:column; gap:11px; margin-bottom:28px; }
.check-list li { display:flex; align-items:flex-start; gap:10px; font-size:14px; color:var(--t2); }

/* SETTINGS */
.settings-nav-btn { width:100%; padding:9px 12px; border-radius:8px; border:none; background:transparent; font-size:14px; cursor:pointer; text-align:left; transition:all .15s; color:var(--t2); }
.settings-nav-btn:hover { background:rgba(255,255,255,.04); color:var(--t1); }
.settings-nav-btn.active { background:var(--card); color:var(--t1); font-weight:500; }
.toggle { width:44px; height:24px; border-radius:12px; border:1px solid var(--bd); cursor:pointer; position:relative; transition:background .2s; flex-shrink:0; }
.toggle-thumb { position:absolute; top:3px; width:16px; height:16px; border-radius:50%; background:#fff; transition:left .2s; }

/* AUTH */
.auth-wrap { min-height:100vh; display:flex; align-items:center; justify-content:center; position:relative; overflow:hidden; background:var(--bg); padding:40px 24px; }
.auth-card { background:rgba(12,22,40,.87); backdrop-filter:blur(24px); border:1px solid var(--bd); border-radius:20px; padding:36px 32px; box-shadow:0 24px 80px rgba(0,0,0,.5); width:100%; max-width:420px; position:relative; z-index:2; }
.tab-bar { display:flex; background:rgba(255,255,255,.04); border-radius:10px; padding:4px; margin-bottom:28px; }
.tab-btn { flex:1; padding:9px 0; border-radius:8px; font-size:14px; font-weight:500; border:1px solid transparent; cursor:pointer; transition:all .2s; background:transparent; color:var(--t3); }
.tab-btn.active { background:var(--card2); color:var(--t1); border-color:var(--bd); }