:root{--navy:#182033;--teal:#0f766e;--teal-dark:#0a5c56;--bg:#f5f7f8;--surface:#fff;--muted:#667085;--line:#e4e7ec;--danger:#b42318;--radius:8px}*{box-sizing:border-box}html{color:var(--navy);background:var(--bg);font-family:Arial,Helvetica,sans-serif}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.container{width:min(1160px,100% - 32px);margin:auto}.topbar{justify-content:space-between;align-items:center;height:72px;display:flex}.brand{letter-spacing:-.03em;align-items:center;gap:10px;font-weight:800;display:flex}.brand-mark{background:linear-gradient(145deg,var(--teal),#15a394);color:#fff;border-radius:8px;place-items:center;width:34px;height:34px;display:grid}.nav{color:#475467;align-items:center;gap:24px;display:flex}.button{background:var(--teal);color:#fff;cursor:pointer;border:0;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:11px 16px;font-weight:700;display:inline-flex}.button:hover{background:var(--teal-dark)}.button.secondary{color:var(--navy);border:1px solid var(--line);background:#fff}.button.danger{background:var(--danger)}.hero{background:radial-gradient(circle at 80% 0,#d8f4f0 0,transparent 34%),linear-gradient(180deg,#fff,var(--bg));padding:84px 0 76px}.eyebrow{color:var(--teal);text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:800}.hero h1{letter-spacing:-.055em;max-width:760px;margin:18px 0;font-size:clamp(42px,7vw,72px);line-height:.98}.hero p{color:#475467;max-width:680px;font-size:20px;line-height:1.55}.hero-actions{gap:12px;margin-top:28px;display:flex}.grid{gap:18px;display:grid}.features{grid-template-columns:repeat(3,1fr);padding:64px 0}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 2px #1018280a}.card h2,.card h3{margin:0 0 9px}.card p{color:var(--muted);margin:0;line-height:1.55}.section{padding:64px 0}.section-title{letter-spacing:-.04em;margin:0 0 10px;font-size:36px}.pricing{grid-template-columns:repeat(4,1fr)}.price{margin:18px 0;font-size:32px;font-weight:800}.footer{border-top:1px solid var(--line);color:var(--muted);padding:30px 0}.auth-card{width:min(440px,100% - 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129px);display:grid;overflow:hidden}.conversation-list{border-right:1px solid var(--line);overflow:auto}.conversation-item{border-bottom:1px solid var(--line);padding:16px;display:block}.conversation-item:hover{background:#f8fafb}.conversation-item strong{justify-content:space-between;display:flex}.conversation-item p{white-space:nowrap;text-overflow:ellipsis;color:var(--muted);margin:7px 0 0;font-size:13px;overflow:hidden}.thread{flex-direction:column;min-width:0;display:flex}.messages{background:#f8fafb;flex:1;padding:20px;overflow:auto}.bubble{border:1px solid var(--line);background:#fff;border-radius:8px;width:fit-content;max-width:75%;margin:8px 0;padding:10px 13px;line-height:1.45}.bubble.out{background:#dff5f1;border-color:#b9e4dc;margin-left:auto}.composer{border-top:1px solid var(--line);gap:8px;padding:14px;display:flex}.contact-panel{border-left:1px solid var(--line);padding:18px}.empty{height:100%;color:var(--muted);text-align:center;place-items:center;padding:30px;display:grid}.steps{grid-template-columns:220px 1fr;gap:20px;display:grid}.step-list{gap:5px;display:grid}.step{color:var(--muted);border-radius:8px;padding:10px}.step.current{color:var(--teal);background:#e7f5f3;font-weight:700}@media (max-width:1000px){.pricing,.stats{grid-template-columns:repeat(2,1fr)}.inbox{grid-template-columns:280px 1fr}.contact-panel{display:none}}@media (max-width:760px){.nav a:not(.button){display:none}.features,.pricing,.shell{grid-template-columns:1fr}.sidebar{height:auto;padding:10px;display:flex;position:static;overflow:auto}.sidebar .brand,.sidebar-bottom{display:none}.side-link{white-space:nowrap}.main-header{padding:0 16px}.content{padding:18px}.stats{grid-template-columns:1fr 1fr}.inbox{grid-template-columns:1fr;height:auto}.conversation-list{border-right:0;max-height:300px}.thread{min-height:500px}.steps{grid-template-columns:1fr}.step-list{display:flex;overflow:auto}.hero{padding:55px 0}.hero-actions{flex-direction:column}}