:root{
  --wa:#25D366;--wa-d:#128C7E;--wa-dd:#075E54;
  --ink:#0b141a;--muted:#667781;--line:#e9edef;--bg:#f0f2f5;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--wa-d);text-decoration:none}
.nav{background:#fff;border-bottom:1px solid var(--line);padding:14px 20px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:5}
.brand{font-weight:800;font-size:19px;color:var(--wa-dd);display:flex;align-items:center;gap:8px}
.brand .dot{width:26px;height:26px;border-radius:50%;background:var(--wa);display:inline-flex;align-items:center;justify-content:center;color:#fff}
.container{max-width:960px;margin:0 auto;padding:24px 20px}
.btn{background:var(--wa);color:#fff;border:0;border-radius:22px;padding:10px 18px;font-size:15px;font-weight:600;cursor:pointer}
.btn:hover{background:var(--wa-d)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--bg)}
.btn.sm{padding:6px 12px;font-size:13px;border-radius:16px}
.btn.danger{background:#fff;color:#c62828;border:1px solid #f0c9c7}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.grid{display:grid;gap:14px}
input,textarea,select{width:100%;padding:10px 12px;border:1px solid #d1d7db;border-radius:8px;font-size:15px;font-family:inherit}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--wa-d)}
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.muted{color:var(--muted)}
.err{background:#fdecea;color:#b71c1c;padding:10px 12px;border-radius:8px;font-size:14px;margin:10px 0;display:none}
.row{display:flex;gap:10px;align-items:center}
.between{display:flex;justify-content:space-between;align-items:center}
/* landing */
.hero{text-align:center;padding:56px 20px 30px}
.hero h1{font-size:34px;margin:0 0 14px;line-height:1.2}
.hero .accent{color:var(--wa-d)}
.hero p{font-size:17px;color:var(--muted);max-width:560px;margin:0 auto 22px}
.auth{max-width:380px;margin:20px auto 60px}
.tabs{display:flex;margin-bottom:16px;border:1px solid var(--line);border-radius:22px;overflow:hidden}
.tabs button{flex:1;background:#fff;border:0;padding:10px;font-weight:600;cursor:pointer}
.tabs button.active{background:var(--wa);color:#fff}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:820px;margin:10px auto 40px}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.step .n{width:34px;height:34px;border-radius:50%;background:var(--wa);color:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center;margin-bottom:10px}
/* dashboard */
.form-row{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px}
.pill{background:var(--bg);border-radius:14px;padding:3px 10px;font-size:12px;color:var(--muted)}
/* builder */
.builder{display:grid;grid-template-columns:1fr 380px;gap:20px}
@media(max-width:820px){.builder{grid-template-columns:1fr}}
.field-card{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:10px;background:#fff}
.field-card .row2{display:grid;grid-template-columns:1fr 140px;gap:8px}
.preview-phone{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;position:sticky;top:80px}
.preview-top{background:var(--wa-d);color:#fff;padding:16px}
.preview-body{padding:16px}
.tag{display:inline-block;font-size:11px;background:#e7f7ee;color:var(--wa-dd);border-radius:10px;padding:2px 8px;margin-right:6px}
.linkbox{display:flex;gap:8px;margin-top:8px}
.linkbox input{background:var(--bg)}