*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
--primary:#1B3A7B;--primary-light:#2B55A8;--primary-dark:#0F2354;
--primary-50:#EBF0FA;--primary-100:#C6D4F0;
--accent:#F59E0B;--accent-light:#FCD34D;
--dark:#0F172A;--dark-700:#1E293B;--dark-600:#334155;
--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-300:#CBD5E1;--gray-400:#94A3B8;--gray-500:#64748B;
--white:#FFFFFF;--green:#16A34A;
--font-heading:'Plus Jakarta Sans',sans-serif;--font-body:'DM Sans',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--dark);background:var(--gray-100);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:var(--font-heading)}

/* NAV */
nav{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);transition:box-shadow .3s}
nav.scrolled{box-shadow:0 4px 20px rgba(15,23,42,.06)}
.nav-in{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:10px 24px}
.nav-logo{display:flex;align-items:center;gap:4px;text-decoration:none}
.nav-logo img{height:44px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{text-decoration:none;color:var(--dark-600);font-size:14px;font-weight:500;padding:8px 14px;border-radius:8px;transition:all .2s}
.nav-links a:hover{color:var(--primary);background:var(--primary-50)}
.nav-cta{background:var(--primary)!important;color:var(--white)!important;padding:10px 20px!important;border-radius:10px!important;font-weight:600!important;box-shadow:0 2px 8px rgba(27,58,123,.25)}
.nav-cta:hover{background:var(--primary-light)!important;transform:translateY(-1px)}
.mob-btn{display:none;background:none;border:none;cursor:pointer;padding:8px}
.mob-btn span{display:block;width:22px;height:2px;background:var(--dark);margin:5px 0;border-radius:2px;transition:all .3s}
.mob-menu{display:none;position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--white);z-index:999;padding:24px;flex-direction:column;gap:4px}
.mob-menu.open{display:flex}
.mob-menu a{display:block;padding:14px 16px;text-decoration:none;color:var(--dark);font-size:16px;font-weight:500;border-radius:10px}
.mob-menu .mc{margin-top:12px;background:var(--primary);color:var(--white);text-align:center;border-radius:12px;font-weight:600}

/* HERO */
.hero{background:linear-gradient(135deg,var(--primary-dark),var(--primary) 55%,var(--primary-light));color:#fff;padding:56px 24px 40px}
.hero-in{max-width:900px;margin:0 auto;text-align:center}
.hero .badge{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:16px}
.hero h1{font-size:clamp(26px,4vw,40px);font-weight:800;line-height:1.15;margin-bottom:14px}
.hero h1 .hl{color:var(--accent-light)}
.hero p{font-size:clamp(15px,2vw,18px);color:rgba(255,255,255,.9);max-width:640px;margin:0 auto}

/* CALC */
.wrap{max-width:960px;margin:-24px auto 0;padding:0 20px 60px}
.calc{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}
.card{background:#fff;border-radius:18px;box-shadow:0 10px 40px rgba(15,23,42,.08);border:1px solid var(--gray-200)}
.card-pad{padding:26px}
.card h2{font-size:19px;font-weight:700;color:var(--primary-dark);margin-bottom:4px}
.card .sub{font-size:13px;color:var(--gray-500);margin-bottom:20px}
.field{margin-bottom:20px}
.field>label{display:block;font-size:14px;font-weight:600;color:var(--dark-700);margin-bottom:8px}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.seg button{font-family:var(--font-body);border:1.5px solid var(--gray-200);background:#fff;color:var(--dark-600);padding:12px 10px;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:all .18s;text-align:center}
.seg button.on{border-color:var(--primary);background:var(--primary-50);color:var(--primary);box-shadow:0 2px 8px rgba(27,58,123,.12)}
select,input[type=number]{width:100%;font-family:var(--font-body);font-size:15px;color:var(--dark);padding:12px 14px;border:1.5px solid var(--gray-200);border-radius:12px;background:#fff;outline:none;transition:border .18s}
select:focus,input[type=number]:focus{border-color:var(--primary)}
.stepwrap{position:relative}
.hint{font-size:12px;color:var(--gray-400);margin-top:6px}
.field>label.lbl-toggle{display:flex;align-items:center;gap:8px;cursor:pointer}
.field>label.lbl-toggle input{width:16px;height:16px;accent-color:var(--primary);cursor:pointer;flex-shrink:0}
input[type=number]:disabled{opacity:.5;background:var(--gray-100);cursor:not-allowed}
.checks{display:flex;flex-direction:column;gap:10px}
.chk{display:flex;align-items:center;gap:11px;padding:11px 14px;border:1.5px solid var(--gray-200);border-radius:12px;cursor:pointer;transition:all .18s}
.chk.on{border-color:var(--primary-100);background:var(--primary-50)}
.chk input{width:18px;height:18px;accent-color:var(--primary);cursor:pointer}
.chk .t{font-size:14px;font-weight:600;color:var(--dark-700)}
.chk .t small{display:block;font-size:12px;font-weight:400;color:var(--gray-400);margin-top:1px}
.chk .p{margin-left:auto;font-size:13px;color:var(--gray-500);font-weight:600;white-space:nowrap}
.subgroup{font-size:13px;font-weight:700;color:var(--dark-700);margin:18px 0 10px}
.subgroup span{font-weight:400;color:var(--gray-400)}

/* GROUPS */
.group{border:1.5px solid var(--gray-200);border-radius:14px;padding:18px;margin-bottom:14px;background:var(--white)}
.group-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.group-title{font-weight:700;color:var(--primary-dark);font-size:14px}
.group .rm{background:none;border:none;color:var(--gray-400);cursor:pointer;font-size:15px;line-height:1;padding:5px 9px;border-radius:8px;transition:all .15s}
.group .rm:hover{background:#FEE2E2;color:#DC2626}
.addbtn{width:100%;border:1.5px dashed var(--gray-300);background:var(--gray-100);color:var(--primary);font-family:var(--font-body);font-weight:700;font-size:14px;padding:13px;border-radius:12px;cursor:pointer;transition:all .18s}
.addbtn:hover{border-color:var(--primary);background:var(--primary-50)}
.notecard{margin-top:16px;font-size:13px;color:var(--dark-600);background:var(--primary-50);border-radius:12px;padding:13px 15px;line-height:1.5}
.notecard a{color:var(--primary);font-weight:700;text-decoration:none}
.grp-h{font-weight:700;color:var(--primary-dark);font-size:13px;margin:18px 0 2px;padding-top:14px;border-top:1px solid var(--gray-200)}
.grp-h:first-child{border-top:none;padding-top:0;margin-top:0}
.grp-sub{display:flex;justify-content:space-between;font-size:13px;font-weight:600;color:var(--dark-600);padding:9px 0 2px}
.grp-sub span{color:var(--primary)}

/* MODES + PIPA VIEW */
.modes{display:grid;grid-template-columns:1fr 1fr;gap:8px;background:#fff;border:1px solid var(--gray-200);border-radius:14px;padding:8px;margin-bottom:20px;box-shadow:0 10px 40px rgba(15,23,42,.08)}
.modes button{font-family:var(--font-body);border:none;background:none;color:var(--dark-600);padding:12px 10px;border-radius:10px;font-size:14px;font-weight:700;cursor:pointer;transition:all .18s}
.modes button.on{background:var(--primary);color:#fff}
.qtyrow{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.qtyrow>label{font-size:14px;font-weight:600;color:var(--dark-700)}
.qtyrow input{width:90px;text-align:center}
.baserow{display:flex;justify-content:space-between;align-items:center;background:var(--primary-50);border:1.5px solid var(--primary-100);border-radius:12px;padding:14px 16px}
.baserow .n{font-size:14px;font-weight:700;color:var(--primary-dark)}
.baserow .n small{display:block;font-size:12px;font-weight:400;color:var(--primary-light)}
.baserow .v{font-size:15px;font-weight:800;color:var(--primary)}
.seclabel{font-size:13px;font-weight:700;color:var(--dark-700);margin:20px 0 10px}
.seclabel span{font-weight:400;color:var(--gray-400)}
.items{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.li{display:grid;grid-template-columns:20px 1fr auto;grid-template-areas:"chk name name" "chk qty total";column-gap:10px;row-gap:8px;align-items:center;padding:12px 14px;border:1.5px solid var(--gray-200);border-radius:12px;cursor:pointer;transition:all .15s}
.li.on{border-color:var(--primary-100);background:var(--primary-50)}
.li>input.li-chk{grid-area:chk;width:18px;height:18px;accent-color:var(--primary);cursor:pointer;align-self:center}
.li-name{grid-area:name;font-size:13.5px;font-weight:600;color:var(--dark-700);line-height:1.35}
.li-name small{font-size:12px;font-weight:400;color:var(--gray-400)}
.li-qtywrap{grid-area:qty;display:flex;align-items:center;gap:6px}
.li .li-qty{width:100%;max-width:88px;text-align:center;padding:8px}
.li-qty:disabled{background:var(--gray-100);color:var(--gray-400)}
.li-unit{font-size:12px;color:var(--gray-500)}
.li-total{grid-area:total;font-size:13px;font-weight:700;color:var(--primary);white-space:nowrap;text-align:right}
.notes{margin-top:14px;border:1px solid var(--gray-200);border-radius:10px;padding:12px 14px}
.notes-h{font-size:13px;font-weight:700;color:var(--dark-700);margin-bottom:6px}
.notes ul{margin:0;padding-left:18px}
.notes li{font-size:12px;color:var(--gray-500);margin-bottom:4px;line-height:1.5}
@media(max-width:520px){.items{grid-template-columns:1fr}}

/* RESULT */
.result{position:sticky;top:84px;align-self:start}
.result h2{color:var(--primary-dark)}
.brk{list-style:none;margin:6px 0 0}
.brk li{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed var(--gray-200);font-size:14px}
.brk li .lbl{color:var(--dark-600)}
.brk li .lbl small{display:block;color:var(--gray-400);font-size:12px;font-weight:400}
.brk li .amt{font-weight:600;color:var(--dark-700);white-space:nowrap}
.total{display:flex;justify-content:space-between;align-items:baseline;margin-top:16px;padding-top:16px;border-top:2px solid var(--gray-200)}
.total .k{font-size:15px;font-weight:700;color:var(--dark-700)}
.total .v{font-size:26px;font-weight:800;color:var(--primary);font-family:var(--font-heading)}
.disc{font-size:12px;color:var(--gray-500);background:var(--gray-100);border-radius:10px;padding:11px 13px;margin-top:16px;line-height:1.5}
.wa-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin-top:16px;background:var(--green);color:#fff;text-decoration:none;font-weight:700;font-size:15px;padding:14px;border-radius:12px;box-shadow:0 6px 18px rgba(22,163,74,.28);transition:transform .18s}
.wa-btn:hover{transform:translateY(-1px)}
.tel-btn{display:block;text-align:center;margin-top:10px;color:var(--primary);font-weight:600;text-decoration:none;font-size:14px}

/* INFO */
.info{max-width:960px;margin:36px auto 0;padding:0 20px}
.info h2{font-size:22px;color:var(--primary-dark);margin-bottom:16px;text-align:center}
.faq{background:#fff;border-radius:14px;border:1px solid var(--gray-200);padding:6px 22px}
.faq details{border-bottom:1px solid var(--gray-200);padding:14px 0}
.faq details:last-child{border-bottom:none}
.faq summary{font-weight:600;color:var(--dark-700);cursor:pointer;font-size:15px;list-style:none;display:flex;justify-content:space-between}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';color:var(--primary);font-weight:700;font-size:20px}
.faq details[open] summary::after{content:'–'}
.faq p{margin-top:10px;font-size:14px;color:var(--gray-500)}

/* FOOTER */
footer{background:var(--dark);color:var(--gray-300);padding:48px 24px 28px;margin-top:56px}
.ft-in{max-width:1200px;margin:0 auto}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.ft-brand img{height:40px;margin-bottom:14px}
.ft-brand p{font-size:13px;line-height:1.7}
.ft-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.ft-col a{display:block;color:var(--gray-400);text-decoration:none;font-size:13px;padding:5px 0;transition:color .2s}
.ft-col a:hover{color:#fff}
.ft-div{height:1px;background:rgba(255,255,255,.1);margin:32px 0 20px}
.ft-bot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--gray-500)}

/* WA FLOAT */
.wa{position:fixed;right:24px;bottom:24px;z-index:1000;width:56px;height:56px;background:#25D366;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(37,211,102,.4)}
.wa svg{width:30px;height:30px;fill:#fff}

@media(max-width:820px){
.nav-links{display:none}.mob-btn{display:block}
.calc{grid-template-columns:1fr}
.result{position:static}
.ft-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
.nav-in{padding:8px 16px}.nav-logo img{height:36px}
.card-pad{padding:20px}
.ft-grid{grid-template-columns:1fr}
}

/* ── Perbaikan luber di layar kecil ──────────────────────────────────────
   Grid kolom tetap yang ditulis langsung di atribut style tidak pernah
   menyusut: track 1fr bertumpu pada lebar min-content isinya, jadi kartu
   ber-padding tebal memaksa halaman melebar dan bisa digeser ke samping.
   min-width:0 melepas batas itu; jumlah kolom diturunkan bertahap supaya
   isinya tetap terbaca, bukan sekadar tidak luber. */
@media(max-width:768px){
  [style*="grid-template-columns:repeat("]>*{min-width:0}
  [style*="repeat(4,1fr)"],[style*="repeat(5,1fr)"]{grid-template-columns:repeat(2,1fr)!important}
}
@media(max-width:560px){
  [style*="repeat(3,1fr)"]{grid-template-columns:repeat(2,1fr)!important}
}
@media(max-width:430px){
  [style*="repeat(2,1fr)"],[style*="repeat(3,1fr)"],
  [style*="repeat(4,1fr)"],[style*="repeat(5,1fr)"]{grid-template-columns:1fr!important}
}


/* Shared performance safeguards */
img{max-width:100%;height:auto}
img[loading="lazy"]{content-visibility:auto}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}.anim{opacity:1!important;transform:none!important}}