*{margin:0;padding:0;box-sizing:border-box;font-family:'Poppins',sans-serif}
body{background:#f4f7fb;color:#1c2430}

/* ============ HERO ============ */
.hero{
    background:linear-gradient(135deg,#00c6ff,#0072ff);
    color:#fff;
    padding:80px 40px 100px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:40px;
    flex-wrap:wrap;
    position:relative;
    overflow:hidden;
}
.hero-inner{max-width:560px;position:relative;z-index:2}
.eyebrow{
    display:inline-block;
    background:rgba(255,255,255,.18);
    padding:6px 14px;
    border-radius:20px;
    font-size:12px;
    letter-spacing:.5px;
    margin-bottom:18px;
}
.hero h1{font-size:2.6rem;line-height:1.2;margin-bottom:18px;font-weight:600}
.hero h1 span{color:#eaffb9}
.hero p{opacity:.92;line-height:1.7;margin-bottom:28px;font-size:15px}
.hero-btn{
    display:inline-flex;align-items:center;gap:8px;
    background:#fff;color:#0072ff;font-weight:600;
    padding:14px 26px;border-radius:8px;text-decoration:none;
    transition:.25s;
}
.hero-btn:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(0,0,0,.2)}

/* Chat preview card */
.preview-card{
    background:#fff;color:#1c2430;border-radius:16px;padding:0;
    width:280px;box-shadow:0 25px 50px rgba(0,0,0,.25);position:relative;z-index:2;
    flex-shrink:0;overflow:hidden;
}
.chat-head{
    background:#075e54;color:#fff;padding:16px 18px;
    display:flex;align-items:center;gap:12px;
}
.chat-avatar{
    width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.15);
    display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
}
.chat-name{font-weight:600;font-size:14px}
.chat-status{font-size:11px;opacity:.8}
.chat-bubble{
    background:#e9fbe9;margin:18px;padding:12px 14px;border-radius:10px 10px 10px 2px;
    font-size:13px;line-height:1.5;color:#222;word-break:break-word;
    box-shadow:0 2px 6px rgba(0,0,0,.05);
}

/* ============ FORM ============ */
main{max-width:900px;margin:-50px auto 60px;padding:0 20px;position:relative;z-index:3}

.step{
    background:#fff;border-radius:14px;padding:35px 35px 35px 100px;
    margin-bottom:22px;box-shadow:0 10px 30px rgba(0,0,0,.06);position:relative;
}
.step-num{
    position:absolute;left:30px;top:35px;
    font-size:2rem;font-weight:700;color:#e3edff;
    line-height:1;
}
.step h2{font-size:1.3rem;margin-bottom:6px;color:#1c2430}
.step-hint{color:#8a94a3;font-size:13px;margin-bottom:18px;line-height:1.6}
.step-hint code{background:#f0f4fa;padding:2px 6px;border-radius:4px;color:#0072ff;font-size:12px}

.grid{display:grid;gap:16px}
.grid-1{grid-template-columns:1fr}

.field label{display:block;font-size:12px;font-weight:600;color:#5b6472;margin-bottom:6px}
.field input, .field textarea{
    width:100%;padding:12px 14px;border:1px solid #e1e6ee;border-radius:8px;
    font-size:14px;font-family:inherit;transition:.2s;background:#fbfcfe;resize:vertical;
}
.field input:focus, .field textarea:focus{outline:none;border-color:#0072ff;background:#fff;box-shadow:0 0 0 3px rgba(0,114,255,.1)}

.submit-bar{text-align:center;padding:30px 0 10px}
#openBtn{
    background:#25D366;color:#fff;border:none;
    padding:16px 40px;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;
    display:inline-flex;align-items:center;gap:10px;transition:.25s;
}
#openBtn:hover{transform:translateY(-3px);box-shadow:0 15px 30px rgba(37,211,102,.35)}
.submit-hint{color:#9aa3b1;font-size:12px;margin-top:14px}

.link-row{
    max-width:500px;margin:22px auto 0;display:flex;gap:8px;
}
.link-row input{
    flex:1;padding:12px 14px;border:1px solid #e1e6ee;border-radius:8px;
    font-size:13px;background:#fbfcfe;color:#5b6472;
}
.copy-btn{
    background:#eef2f7;color:#333;border:none;padding:12px 18px;border-radius:8px;
    font-size:13px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;white-space:nowrap;
}
.copy-btn:hover{background:#dde5ee}
.copy-btn.copied{background:#e9fbef;color:#1a7f37}

footer{background:#0f2027;color:#fff;padding:30px 20px;text-align:center;font-size:13px}

@media(max-width:768px){
    .hero{padding:60px 24px 90px}
    .hero h1{font-size:2rem}
    .step{padding:30px 20px 30px 65px}
    .step-num{left:16px;top:30px;font-size:1.5rem}
    .preview-card{width:100%}
    main{margin-top:-40px}
    .link-row{flex-direction:column}
}