:root{
  --bg:#f3f7fb;
  --surface:#ffffff;
  --surface-2:#f7fafc;
  --ink:#0f2233;
  --muted:#5b7183;
  --faint:#566a7b;
  --line:#e3ecf3;
  --line-2:#d2e0ea;
  --brand:#0ea5e9;
  --brand-600:#0284c7;
  --brand-700:#036aa1;
  --brand-ink:#053f5e;
  --teal:#0fb6a4;
  --warn-bg:#fff4e0;
  --warn-ink:#9a5b07;
  --shadow-sm:0 1px 2px rgba(15,34,51,.06), 0 1px 3px rgba(15,34,51,.05);
  --shadow-md:0 6px 18px rgba(15,34,51,.08), 0 2px 6px rgba(15,34,51,.05);
  --shadow-lg:0 18px 50px rgba(8,52,86,.14);
  --r-sm:9px; --r-md:13px; --r-lg:18px; --r-xl:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;font-weight:700}
a{color:inherit;text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1140px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--teal));color:#fff;font-size:18px}
.brand-name span{color:var(--brand-600)}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;font-weight:500;color:var(--muted)}
.nav-links a:hover{color:var(--ink)}
.nav .btn{margin-left:8px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-weight:600;font-size:15px;border:1px solid transparent;border-radius:var(--r-md);padding:11px 18px;cursor:pointer;transition:transform .08s,box-shadow .15s,background .15s;white-space:nowrap}
.btn:active{transform:scale(.98)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-600));color:#fff;box-shadow:0 6px 16px rgba(2,132,199,.28)}
.btn-primary:hover{box-shadow:0 10px 24px rgba(2,132,199,.36)}
.btn-sm{padding:9px 15px;font-size:14px}
.btn-lg{padding:15px 26px;font-size:17px;border-radius:var(--r-lg)}
.btn-block{width:100%}

/* hero */
.hero{position:relative;background:radial-gradient(1200px 500px at 80% -10%,rgba(15,182,164,.18),transparent),linear-gradient(160deg,#e8f6ff 0%,#eef4fb 55%,var(--bg) 100%);padding:74px 0 96px;overflow:hidden}
.hero-inner{max-width:920px;margin:0 auto;padding:0 24px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--line-2);color:var(--brand-700);font-weight:600;font-size:13.5px;padding:7px 14px;border-radius:999px;box-shadow:var(--shadow-sm)}
.hero-badge i{color:var(--teal)}
.hero h1{font-size:clamp(34px,5.4vw,58px);font-weight:800;margin:22px 0 0}
.grad{background:linear-gradient(120deg,var(--brand-600),var(--teal));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:660px;margin:18px auto 0}
.hero-cta{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:30px}
.hero-note{font-size:14px;color:var(--faint);display:inline-flex;align-items:center;gap:6px}
.hero-stats{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:42px}
.hero-stats>div{background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 20px;min-width:150px}
.hero-stats strong{display:block;font-size:18px;color:var(--brand-ink)}
.hero-stats span{font-size:13px;color:var(--muted)}
.hero-wave{position:absolute;bottom:-1px;left:0;width:100%;line-height:0}
.hero-wave svg{width:100%;height:70px;display:block}
.hero-wave path{fill:var(--bg)}

/* config */
.config-head{text-align:center;margin:60px 0 30px}
.config-head h2{font-size:clamp(26px,3.5vw,36px)}
.config-head p{color:var(--muted);margin-top:8px}
.config-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:28px;align-items:start;padding-bottom:80px}

/* steps */
.controls{display:flex;flex-direction:column;gap:16px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;box-shadow:var(--shadow-sm)}
.step-head{display:flex;align-items:center;gap:12px}
.step-num{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--surface-2);border:1px solid var(--line-2);color:var(--brand-700);font-size:14px;font-weight:700}
.step-head h3{font-size:17px;font-weight:600}
.step-hint{color:var(--faint);font-size:13.5px;margin:6px 0 0 38px}
.step > .type-grid,.step > .shape-grid,.step > .seg,.step > .chips,.step > .select,.step > .slider-row:first-of-type{margin-top:16px}

/* type cards */
.type-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.type-card{font-family:inherit;text-align:left;background:var(--surface);border:1.5px solid var(--line-2);border-radius:var(--r-md);padding:16px 14px;cursor:pointer;display:flex;flex-direction:column;gap:6px;transition:border-color .12s,box-shadow .12s,background .12s}
.type-card i{font-size:24px;color:var(--brand-600)}
.type-card:hover{border-color:var(--brand);box-shadow:var(--shadow-sm)}
.type-name{font-weight:600;font-size:15px}
.type-desc{font-size:12.5px;color:var(--muted);line-height:1.4}
.type-card.is-sel{border-color:var(--brand);background:linear-gradient(180deg,#f0faff,#fff);box-shadow:0 0 0 3px rgba(14,165,233,.14)}

/* shapes */
.shape-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.shape-card{font-family:inherit;background:var(--surface);border:1.5px solid var(--line-2);border-radius:var(--r-md);padding:12px 6px 10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:8px;font-size:12.5px;font-weight:500;color:var(--muted);transition:border-color .12s,box-shadow .12s}
.shape-card svg{width:100%;height:30px}
.shape-card svg :is(rect,ellipse,path){fill:#bcd4e6;transition:fill .12s}
.shape-card:hover{border-color:var(--brand)}
.shape-card.is-sel{border-color:var(--brand);box-shadow:0 0 0 3px rgba(14,165,233,.14);color:var(--ink)}
.shape-card.is-sel svg :is(rect,ellipse,path){fill:var(--brand)}

/* segmented */
.seg{display:flex;background:var(--surface-2);border:1px solid var(--line-2);border-radius:var(--r-md);padding:4px;gap:4px}
.seg button{flex:1;font-family:inherit;font-size:14px;font-weight:600;color:var(--muted);background:transparent;border:none;border-radius:9px;padding:9px 4px;cursor:pointer;transition:background .12s,color .12s,box-shadow .12s}
.seg button:hover{color:var(--ink)}
.seg button.is-sel{background:#fff;color:var(--brand-700);box-shadow:var(--shadow-sm)}

/* sliders */
.slider-row{display:flex;align-items:center;gap:14px;margin-top:14px}
.slider-row label{width:56px;font-size:14px;color:var(--muted);font-weight:500}
.slider-row output{width:54px;text-align:right;font-weight:600;font-size:14px}
input[type=range]{-webkit-appearance:none;appearance:none;flex:1;height:6px;border-radius:99px;background:linear-gradient(90deg,var(--brand) 0%,var(--brand) var(--p,50%),var(--line-2) var(--p,50%),var(--line-2) 100%);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:#fff;border:2px solid var(--brand);box-shadow:var(--shadow-sm);cursor:pointer;transition:transform .1s}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.12)}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:2px solid var(--brand);cursor:pointer}

/* select */
.select{width:100%;font-family:inherit;font-size:14.5px;font-weight:500;color:var(--ink);background:var(--surface);border:1.5px solid var(--line-2);border-radius:var(--r-md);padding:12px 14px;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%235b7183' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.select:focus{border-color:var(--brand);outline:none}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{font-family:inherit;display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:500;color:var(--muted);background:var(--surface);border:1.5px solid var(--line-2);border-radius:999px;padding:9px 15px;cursor:pointer;transition:all .12s}
.chip i{font-size:16px}
.chip:hover{border-color:var(--brand);color:var(--ink)}
.chip.is-sel{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(14,165,233,.3)}

/* warn */
.warn{display:flex;align-items:center;gap:8px;margin-top:14px;background:var(--warn-bg);color:var(--warn-ink);font-size:13px;font-weight:500;padding:10px 13px;border-radius:var(--r-sm)}
.warn[hidden]{display:none}

/* summary */
.summary{position:sticky;top:88px}
.summary-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);padding:20px;box-shadow:var(--shadow-lg)}
.pool-stage{background:linear-gradient(170deg,#eafaf1,#e3f3fb);border-radius:var(--r-lg);padding:10px;border:1px solid var(--line)}
.pool-stage svg{width:100%;display:block}
.pool-stage .yard{fill:#d8efdc}
.pool-cap{text-align:center;font-size:13px;color:var(--muted);margin-top:6px;font-weight:500}

.estimate{text-align:center;padding:22px 8px 6px}
.est-label{font-size:13px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.est-big{font-size:clamp(34px,7vw,46px);font-weight:800;letter-spacing:-.03em;color:var(--brand-ink);margin-top:2px}
.est-range{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:12.5px;color:var(--muted)}
.est-range b{display:block;color:var(--ink);font-size:14px}
.est-bar{flex:1;position:relative;height:6px;border-radius:99px;background:linear-gradient(90deg,#bfe3f7,var(--brand),#0e7fb8)}
.est-bar i{position:absolute;top:50%;left:50%;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--brand-600);transform:translate(-50%,-50%);box-shadow:var(--shadow-sm)}

.breakdown-toggle{width:100%;font-family:inherit;display:flex;align-items:center;justify-content:space-between;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-md);padding:11px 14px;font-size:14px;font-weight:600;color:var(--ink);cursor:pointer;margin-top:14px}
.breakdown-toggle span{display:inline-flex;align-items:center;gap:8px}
.breakdown-toggle .chev{transition:transform .2s;color:var(--muted)}
.breakdown-toggle[aria-expanded=false] .chev{transform:rotate(180deg)}
.breakdown{overflow:hidden;transition:max-height .25s ease;font-size:13.5px}
.breakdown .bd-row{display:flex;justify-content:space-between;padding:7px 4px;border-bottom:1px solid var(--line)}
.breakdown .bd-row:last-child{border-bottom:none}
.breakdown .bd-row span{color:var(--muted)}
.breakdown .bd-row b{font-weight:600}

.yearly{margin-top:14px;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.yearly-top{display:flex;justify-content:space-between;align-items:center;background:var(--surface-2);padding:11px 14px;font-size:14px;font-weight:600}
.yearly-top span{display:inline-flex;align-items:center;gap:8px;color:var(--muted)}
.yearly-top strong{font-size:16px;color:var(--ink)}
.yearly-break{padding:6px 14px 12px;font-size:13px}
.yearly-break .yr-row{display:flex;justify-content:space-between;padding:4px 0;color:var(--muted)}
#pp-cta{margin-top:16px}
.disclaimer{font-size:12.5px;color:var(--faint);text-align:center;margin-top:12px;line-height:1.5}

/* how */
.how{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:70px 0}
.how h2{text-align:center;font-size:clamp(26px,3.5vw,34px)}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px}
.how-card{text-align:center;padding:10px}
.how-num{display:grid;place-items:center;width:54px;height:54px;margin:0 auto 14px;border-radius:16px;background:linear-gradient(135deg,#e8f6ff,#e6fbf6);color:var(--brand-600);font-size:26px;border:1px solid var(--line)}
.how-card h3{font-size:18px;font-weight:600}
.how-card p{color:var(--muted);margin-top:8px;font-size:15px}

/* footer */
.footer{background:#0c2434;color:#cfe2ee;padding:46px 0}
.footer .brand{color:#fff}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:center}
.footer-tag{color:#9cb8c9;font-size:14px;margin-top:8px}
.footer-fine{color:#789aae;font-size:12px;max-width:520px;line-height:1.6}

@media(max-width:900px){
  .config-grid{grid-template-columns:1fr}
  .summary{position:static}
  .nav{position:static}
  .nav-inner{flex-wrap:wrap}
  .nav-links{order:3;width:100%;justify-content:center;gap:20px;margin:8px 0 0;font-size:14px}
  .nav-links a{padding:6px 0}
}
@media(max-width:560px){
  .type-grid{grid-template-columns:1fr}
  .how-grid{grid-template-columns:1fr}
  .shape-grid{grid-template-columns:repeat(2,1fr)}
  .hero-stats{flex-direction:column}
  .hero-stats>div{width:100%}
}

/* ad slots */
.ad-slot{margin:22px 0}
.ad-slot--placeholder{min-height:100px;display:flex;align-items:center;justify-content:center;background:repeating-linear-gradient(45deg,var(--surface-2),var(--surface-2) 10px,#eef3f8 10px,#eef3f8 20px);border:1px dashed var(--line-2);border-radius:var(--r-md);color:var(--faint);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.08em}

/* guides */
.guides{padding:70px 0;background:var(--bg)}
.guides h2{text-align:center;font-size:clamp(26px,3.5vw,34px)}
.guides-sub{text-align:center;color:var(--muted);margin-top:8px}
.guides-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.guide-card{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-sm);transition:transform .1s,box-shadow .15s}
.guide-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.guide-tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--brand-700)}
.guide-card h3{font-size:17px;font-weight:600}
.guide-card p{font-size:14px;color:var(--muted);flex:1}
.guide-link{font-size:14px;font-weight:600;color:var(--brand-700);display:inline-flex;align-items:center;gap:6px}

/* footer links */
.footer-right{text-align:right}
.footer-links{display:flex;gap:18px;justify-content:flex-end;flex-wrap:wrap;margin-bottom:10px}
.footer-links a{color:#cfe2ee;font-size:13px}
.footer-links a:hover{color:#fff}

/* article pages */
.article-wrap{max-width:760px;margin:0 auto;padding:40px 24px 70px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.breadcrumb a{color:var(--brand-700)}
.article-wrap h1{font-size:clamp(28px,4.5vw,40px);margin:6px 0 10px;letter-spacing:-.02em}
.article-meta{font-size:13.5px;color:var(--faint);margin-bottom:24px}
.article-body{font-size:17px;line-height:1.75;color:var(--ink)}
.article-body h2{font-size:24px;margin:34px 0 12px;letter-spacing:-.01em}
.article-body h3{font-size:19px;margin:24px 0 8px}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 16px 22px}
.article-body li{margin:6px 0}
.article-body a{color:var(--brand-700);text-decoration:underline;text-underline-offset:2px}
.article-body a:hover{color:var(--brand-ink)}
.article-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-table th,.article-table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-table th{background:var(--surface-2);font-weight:600}
.article-cta{background:linear-gradient(135deg,#eaf6ff,#e6fbf6);border:1px solid var(--line-2);border-radius:var(--r-lg);padding:20px 22px;margin:26px 0;text-align:center}
.article-cta p{margin:0 0 10px;font-size:16px}
.article-cta a{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand-600));color:#fff;font-weight:600;padding:11px 20px;border-radius:var(--r-md);text-decoration:none}
.article-faq{margin-top:30px;border-top:1px solid var(--line);padding-top:24px}

@media(max-width:760px){
  .guides-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .footer-right{text-align:left}
  .footer-links{justify-content:flex-start}
}

/* print — clean estimate sheet */
@media print{
  .nav,.hero,.how,.guides,.footer,.ad-slot,.controls,.config-head,.breakdown-toggle,#pp-cta,.disclaimer{display:none !important}
  body{background:#fff}
  .config-grid{display:block;padding:0}
  .summary{position:static}
  .summary-card{box-shadow:none;border:none;padding:0;max-width:100%}
  .summary-card::before{content:"Your PoolPrice estimate";display:block;font-size:22px;font-weight:700;margin-bottom:14px}
  .breakdown{max-height:none !important}
}

/* skip link */
.skip-link{position:absolute;left:8px;top:-56px;z-index:200;background:var(--brand-600);color:#fff;padding:10px 16px;border-radius:var(--r-md);font-weight:600;transition:top .15s}
.skip-link:focus{top:8px;outline:2px solid #fff;outline-offset:2px}

/* visible keyboard focus */
:focus-visible{outline:2px solid var(--brand-700);outline-offset:2px}
input[type=range]:focus-visible{outline:2px solid var(--brand-700);outline-offset:3px}
.select:focus-visible{outline:2px solid var(--brand-700);outline-offset:2px}

/* responsive tables — wide tables scroll inside themselves on phones */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:20px 0}
.table-scroll .article-table{margin:0}

/* visually hidden (screen-reader only) */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}