:root{
  --navy:#2B3A5C;--navy-deep:#1E2A45;--pine:#3A7D44;--pine-dark:#2E6537;
  --slate:#4A5D7E;--slate-lt:#7A8BA6;--sage:#6FA07A;--sage-lt:#A8C3AE;
  --ice:#EDF1F5;--ink:#33415E;--soft:#5C6B88;--white:#fff;
  --radius:16px;--shadow:0 10px 40px rgba(30,42,69,.10);--shadow-sm:0 2px 10px rgba(43,58,92,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Poppins',system-ui,-apple-system,'Segoe UI',sans-serif;color:var(--ink);background:var(--ice);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--pine);text-decoration:none}
.wrap{width:min(940px,92%);margin:0 auto}

/* header */
.top{background:var(--navy-ink,#182236);position:sticky;top:0;z-index:20}
.top{background:linear-gradient(180deg,var(--navy),var(--navy-deep))}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:.55rem;color:#fff;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.brand .mark{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--pine),var(--sage));display:inline-block}
.top .tag{color:var(--sage-lt);font-size:.82rem;font-weight:500}

/* hero */
.hero{padding:3.4rem 0 1.4rem;text-align:center}
.hero h1{color:var(--navy);font-size:clamp(1.9rem,4vw,2.7rem);font-weight:800;letter-spacing:-.02em;margin-bottom:.7rem}
.hero h1 .accent{color:var(--pine)}
.hero p{color:var(--soft);font-size:1.08rem;max-width:600px;margin:0 auto}

/* hero stats */
.stats{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;margin:1.8rem 0 1.4rem}
.stat{background:#fff;border-radius:14px;box-shadow:var(--shadow-sm);padding:1rem 1.4rem;min-width:140px}
.stat b{display:block;color:var(--navy);font-size:1.7rem;font-weight:800;line-height:1.1}
.stat span{color:var(--soft);font-size:.8rem;font-weight:500}
.pricing-line{color:var(--slate);font-size:.95rem;margin-bottom:1.1rem}
.pricing-line b{color:var(--pine);font-weight:700}
.badges{display:flex;justify-content:center;gap:.55rem;flex-wrap:wrap}
.badge{background:#fff;border:1px solid #e2e8f1;border-radius:999px;padding:.4em 1em;font-size:.82rem;font-weight:600;color:var(--slate);box-shadow:var(--shadow-sm)}

/* how it works */
.how{padding:2rem 0 .6rem;text-align:center}
.how h2,.builder-h{color:var(--navy);font-size:1.4rem;font-weight:800;letter-spacing:-.01em}
.how h2{margin-bottom:1.4rem}
.builder-h{text-align:center;margin:2.4rem 0 0}
.how-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;text-align:left}
.how-step{background:#fff;border-radius:14px;box-shadow:var(--shadow-sm);padding:1.4rem}
.how-step .hn{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--pine),var(--sage));color:#fff;font-weight:800;font-size:.95rem;margin-bottom:.7rem}
.how-step b{display:block;color:var(--navy);font-size:1.05rem;margin-bottom:.35rem}
.how-step p{color:var(--soft);font-size:.88rem;line-height:1.55}

/* notify */
.notify{background:linear-gradient(150deg,var(--navy),var(--navy-deep));border-radius:var(--radius);padding:2rem 2.2rem;text-align:center;color:#fff;margin-bottom:2rem}
.notify h3{font-size:1.25rem;font-weight:800;margin-bottom:.5rem}
.notify p{color:rgba(237,241,245,.8);font-size:.92rem;max-width:520px;margin:0 auto 1.2rem}
.notify-form{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap;max-width:480px;margin:0 auto}
.notify-form input{flex:1;min-width:220px;background:rgba(255,255,255,.12);border:2px solid rgba(255,255,255,.2);color:#fff}
.notify-form input::placeholder{color:rgba(237,241,245,.6)}
.notify-form input:focus{background:rgba(255,255,255,.18);border-color:var(--sage-lt)}
.notify-msg{color:#8FCB9B;font-size:.9rem;font-weight:600;margin-top:.8rem;min-height:1.2em}

/* builder card */
.builder{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:2rem;margin:1.6rem 0 2.4rem}
.step{margin-bottom:1.7rem}
.step:last-child{margin-bottom:0}
.step-h{display:flex;align-items:center;gap:.6rem;font-weight:700;color:var(--navy);font-size:.95rem;margin-bottom:.85rem}
.step-h .n{width:22px;height:22px;border-radius:50%;background:var(--ice);color:var(--slate);font-size:.78rem;display:flex;align-items:center;justify-content:center;font-weight:700}
select,input[type=number],input[type=email]{
  width:100%;font-family:inherit;font-size:1rem;padding:.8em 1em;border:2px solid var(--ice);border-radius:12px;
  background:var(--ice);color:var(--ink);transition:border-color .15s ease,background .15s ease;
}
select:focus,input:focus{outline:none;border-color:var(--pine);background:#fff}

/* segment cards */
.segs{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:.7rem}
.seg{border:2px solid var(--ice);border-radius:12px;padding:.9rem 1rem;cursor:pointer;background:#fff;transition:border-color .15s,transform .15s,box-shadow .15s;text-align:left}
.seg:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.seg[aria-pressed=true]{border-color:var(--pine);background:#F1F7F2}
.seg .lbl{font-weight:600;color:var(--navy);font-size:.92rem}
.seg .cnt{font-size:.82rem;color:var(--pine);font-weight:700;margin-top:.15rem}
.seg .cnt.zero{color:var(--slate-lt)}
.seg .bl{font-size:.76rem;color:var(--soft);margin-top:.25rem;line-height:1.4}

/* data type toggle */
.toggle{display:inline-flex;background:var(--ice);border-radius:999px;padding:4px}
.toggle button{border:0;background:none;font-family:inherit;font-weight:600;font-size:.9rem;color:var(--slate);padding:.5em 1.2em;border-radius:999px;cursor:pointer;transition:background .15s,color .15s}
.toggle button[aria-pressed=true]{background:#fff;color:var(--navy);box-shadow:var(--shadow-sm)}

.qty-row{display:flex;gap:.8rem;align-items:center;flex-wrap:wrap}
.qty-row input{max-width:200px}
.qty-hint{font-size:.85rem;color:var(--soft)}

/* summary + actions */
.summary{background:linear-gradient(150deg,var(--navy),var(--navy-deep));border-radius:14px;color:#fff;padding:1.4rem 1.6rem;display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-top:1.8rem}
.summary .avail{font-size:.85rem;color:var(--sage-lt)}
.summary .avail b{color:#fff;font-size:1.5rem;font-weight:800;display:block;line-height:1.2}
.summary .price{text-align:right}
.summary .price .amt{font-size:1.9rem;font-weight:800;line-height:1}
.summary .price .sub{font-size:.8rem;color:rgba(237,241,245,.7)}
.summary .price .disc{color:#8FCB9B;font-size:.8rem;font-weight:600}
.actions{display:flex;gap:.8rem;margin-top:1.2rem;flex-wrap:wrap}
.btn{font-family:inherit;font-weight:600;font-size:1rem;padding:.85em 1.7em;border-radius:999px;border:2px solid transparent;cursor:pointer;transition:transform .15s,background .15s;display:inline-flex;align-items:center;gap:.5em}
.btn-primary{background:var(--pine);color:#fff;box-shadow:0 6px 18px rgba(58,125,68,.32)}
.btn-primary:hover{background:var(--pine-dark);transform:translateY(-2px)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:#fff;color:var(--navy);border-color:var(--ice)}
.btn-ghost:hover{border-color:var(--slate-lt)}

/* sample */
.sample{margin-top:1.4rem;background:var(--ice);border-radius:12px;padding:1rem 1.2rem;display:none}
.sample.show{display:block}
.sample h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--slate);margin-bottom:.7rem}
.sample table{width:100%;border-collapse:collapse;font-size:.86rem}
.sample th{text-align:left;color:var(--slate-lt);font-weight:600;padding:.3rem .5rem;font-size:.76rem;text-transform:uppercase;letter-spacing:.04em}
.sample td{padding:.4rem .5rem;border-top:1px solid #dfe6ee;color:var(--ink)}

.note{font-size:.82rem;color:var(--soft);text-align:center;margin-bottom:2.5rem;line-height:1.6}
.footer{background:var(--navy-deep);color:rgba(237,241,245,.6);text-align:center;padding:1.8rem 0;font-size:.85rem}
.footer a{color:var(--sage-lt)}
.err{color:#C15B4E;font-weight:600;font-size:.9rem;margin-top:.6rem;min-height:1.2em}
@media(max-width:680px){.how-steps{grid-template-columns:1fr}}
@media(max-width:560px){.builder{padding:1.3rem}.summary{flex-direction:column;align-items:flex-start}.summary .price{text-align:left}.stat{min-width:calc(50% - .5rem)}}