/* HydroSling — TidalCore. Static single-page site. No frameworks. */
:root{
  --ink:#0b2e4f;        /* deep navy */
  --ink-soft:#33526e;
  --aqua:#3fc1c9;       /* accent wave */
  --aqua-deep:#186f7a;  /* 5.84:1 on white — WCAG AA compliant (was #1f8a94 @ 4.1:1) */
  --mist:#eaf5f8;       /* pale aqua section bg */
  --paper:#ffffff;
  --line:#d7e5ec;
  --max:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}

/* skip link: hidden until keyboard focus (WCAG 2.4.1) */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;background:var(--ink);color:#fff;padding:10px 18px;border-radius:10px;z-index:999;text-decoration:none;font-weight:700;white-space:nowrap}
.skip-link:focus{left:16px;top:10px;width:auto;height:auto;overflow:visible;outline:3px solid var(--aqua);outline-offset:2px}

/* visible focus rings for keyboard users (WCAG 2.4.7) */
:focus-visible{outline:3px solid var(--aqua-deep);outline-offset:2px}
:where(a, button, input):focus:not(:focus-visible){outline:none}
html.js :focus:not(:focus-visible){outline:none}

/* screen-reader only — still accessible to AT (WCAG 1.3.1) */
.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}
body{font-family:"Avenir Next","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1{font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.12;letter-spacing:-.02em;font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.2rem);line-height:1.2;letter-spacing:-.015em;font-weight:800;margin-bottom:.5em}
h3{font-size:1.12rem;font-weight:700}
p{color:var(--ink-soft)}
a{color:var(--aqua-deep)}
.kicker{color:var(--aqua-deep);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.82rem;margin-bottom:14px}
.lede{font-size:1.08rem;max-width:34em}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-text{font-size:1.18rem;letter-spacing:.04em;color:var(--ink);display:flex;flex-direction:column;line-height:1}
.brand-text strong{font-weight:800}
.brand-text em{font-style:normal;font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--aqua-deep);margin-top:4px}
.brand-text.small{font-size:1rem;display:inline}
.nav{display:flex;align-items:center;gap:22px}
.nav a{color:var(--ink-soft);text-decoration:none;font-size:.92rem;font-weight:600}
.nav a:hover{color:var(--ink)}
.nav-cta{background:var(--ink);color:#fff!important;padding:9px 18px;border-radius:999px}
.nav-cta:hover{background:#123f68}
@media(max-width:820px){.nav a:not(.nav-cta){display:none}}

/* hero */
.hero{background:linear-gradient(180deg,#f4fafc 0%,#ffffff 100%);padding:72px 0 110px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero-media{position:relative}
.hero-media img{border-radius:18px;box-shadow:0 24px 60px -18px rgba(11,46,79,.35)}
.hero-media figcaption{font-size:.82rem;color:var(--ink-soft);margin-top:10px;text-align:center}
.hero-ctas{display:flex;gap:14px;margin:28px 0 26px;flex-wrap:wrap}
.hero-points{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px 20px;font-size:.94rem;color:var(--ink-soft)}
.hero-points li{padding-left:26px;position:relative}
.hero-points li::before{content:"";position:absolute;left:0;top:7px;width:14px;height:8px;background:var(--aqua);border-radius:3px;clip-path:polygon(0 40%,40% 100%,100% 0,100% 30%,40% 100%,0 70%);transform:scale(1.4)}
.wave-sep{position:absolute;left:0;right:0;bottom:-2px;line-height:0}
.wave-sep svg{width:100%;height:74px;display:block}
@media(max-width:880px){.hero{padding-top:48px}.hero-grid{grid-template-columns:1fr;gap:36px}.hero-media{max-width:480px;margin:0 auto}}

/* buttons */
.btn{display:inline-block;text-decoration:none;font-weight:700;border-radius:999px;padding:14px 30px;font-size:1rem;transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--ink);color:#fff;box-shadow:0 10px 24px -10px rgba(11,46,79,.5)}
.btn-primary:hover{background:#123f68;color:#fff}
.btn-ghost{border:2px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--mist)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--mist);color:var(--ink)}

/* band */
.band{background:#eaf5f8;padding:56px 0}
.band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px}
.band-item h3{color:var(--ink);margin-bottom:8px}
@media(max-width:820px){.band-grid{grid-template-columns:1fr}}

/* sections */
.section{padding:88px 0}
.section.alt{background:var(--mist)}
.section-lede{max-width:44em;margin-bottom:40px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.feature .f-ico{display:inline-flex;width:44px;height:44px;border-radius:12px;background:var(--mist);color:var(--aqua-deep);align-items:center;justify-content:center;margin-bottom:14px}
.feature .f-ico svg{width:24px;height:24px}
.feature h4{font-size:1.02rem;margin-bottom:6px}
.feature p{font-size:.92rem}
@media(max-width:880px){.feature-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.feature-grid{grid-template-columns:1fr}}

/* how */
.steps{list-style:none;counter-reset:step;display:grid;grid-template-columns:1fr;gap:14px;max-width:640px;margin-bottom:44px}
.steps li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px 16px 64px;position:relative;color:var(--ink-soft);font-weight:500}
.steps span{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.how-note{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.how-note h3{margin-bottom:12px}
.recovery-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:10px 24px;margin-bottom:14px}
.recovery-list li{padding-left:24px;position:relative;color:var(--ink-soft)}
.recovery-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--aqua)}
.how-note > p{font-size:.88rem;font-style:italic}

/* gallery — masonry: every image keeps its NATURAL aspect ratio (no crop, no stretch) */
.gallery{columns:3;column-gap:18px}
.gallery .g{position:relative;border-radius:16px;overflow:hidden;background:var(--mist);break-inside:avoid;margin:0 0 18px;display:block}
.gallery img{display:block;width:100%;height:auto;object-fit:contain}
.gallery figcaption{display:block;background:var(--ink);color:#dbeef6;font-size:.8rem;padding:10px 16px}
@media(max-width:880px){.gallery{columns:2}}
@media(max-width:620px){.gallery{columns:1}}

/* specs */
.specs-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:start}
table.specs{width:100%;border-collapse:collapse;background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.specs th,.specs td{padding:13px 18px;text-align:left;font-size:.95rem;border-bottom:1px solid var(--line)}
.specs tr:last-child th,.specs tr:last-child td{border-bottom:0}
.specs th{color:var(--ink);font-weight:700;width:46%;background:#f6fbfd}
.specs td{color:var(--ink-soft)}
.swatches{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px 20px;margin-bottom:10px}
.swatches li{display:flex;align-items:center;gap:12px;color:var(--ink-soft);font-weight:600}
.sw{width:26px;height:26px;border-radius:8px;display:inline-block;border:1px solid rgba(0,00,0,.12)}
.sw-white{background:#fff;border:2px solid var(--line)}
.fine{font-size:.82rem;color:var(--ink-soft)}

/* disclaimer */
.disclaimer{background:#fdf6ec;border:1px solid #ecd9b0;border-radius:16px;padding:26px 28px}
.disclaimer h3{margin-bottom:10px;color:#7a5a17}
.disclaimer p{color:#6b5316;font-size:.9rem}

/* cta */
.cta{background:linear-gradient(160deg,var(--ink) 0%,#123f68 100%);color:#fff;text-align:center;padding:96px 24px}
.cta h2{color:#fff}
.cta p{color:#bcd6e8;max-width:40em;margin:0 auto 30px}
.cta-sub{margin-top:26px!important;font-size:.85rem;opacity:.75}

/* footer */
.site-footer{background:#08233d;color:#9db8cc;padding:44px 0;font-size:.85rem}
.site-footer .brand-text, .site-footer .brand-text strong{color:#fff}
.footer-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.site-footer p{color:#9db8cc}

/* subtle entrance (progressive enhancement: content is visible by default) */
@media (prefers-reduced-motion: no-preference){
  .feature,.steps li,.band-item{transition:opacity .5s ease,transform .5s ease}
  html.js .feature:not(.seen),html.js .steps li:not(.seen),html.js .band-item:not(.seen){opacity:0;transform:translateY(14px)}
  .feature.seen,.steps li.seen,.band-item.seen{opacity:1;transform:none}
}

/* ============ BUY SECTION ============ */
.buy-section{background:linear-gradient(180deg,#ffffff 0%,#f4fafc 100%)}
.buy-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:center}
.buy-media img{border-radius:18px;box-shadow:0 24px 60px -18px rgba(11,46,79,.3);width:auto;max-width:100%;height:auto;margin:0 auto}
.buy-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px 32px;box-shadow:0 14px 40px -20px rgba(11,46,79,.25)}
.buy-price{display:flex;align-items:baseline;gap:10px}
.buy-price strong{font-size:2.5rem;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.buy-price span{color:var(--ink-soft);font-weight:600}
.buy-ship{color:var(--aqua-deep);font-weight:700;margin:2px 0 20px}
.buy-label{font-weight:700;font-size:.92rem;margin-bottom:10px}
.buy-note{color:var(--ink-soft);font-weight:400;font-size:.82rem}
.color-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:22px}
.color-chip{display:flex;align-items:center;gap:9px;border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer;font-size:.88rem;font-weight:600;color:var(--ink-soft);transition:border-color .15s ease,box-shadow .15s ease}
.color-chip::before{content:"";width:18px;height:18px;border-radius:50%;background:var(--c);border:1px solid rgba(0,0,0,.15);flex:0 0 auto}
.color-chip.sel,.color-chip[aria-checked="true"]{border-color:var(--ink);box-shadow:0 0 0 3px rgba(63,193,201,.25);color:var(--ink)}
.qty-row{display:inline-flex;align-items:center;border:1.5px solid var(--line);border-radius:999px;overflow:hidden}
.qty-btn{width:44px;height:44px;border:0;background:#f6fbfd;font-size:1.3rem;color:var(--ink);cursor:pointer}
.qty-btn:hover{background:var(--mist)}
#qty{width:64px;height:44px;border:0;text-align:center;font-size:1.05rem;font-weight:700;color:var(--ink);background:#fff;-moz-appearance:textfield}
#qty::-webkit-outer-spin-button,#qty::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.buy-qty{margin-bottom:24px}
.btn-buy{width:100%;display:flex;flex-direction:column;align-items:center;gap:2px;padding:16px 24px;font-size:1.05rem}
.btn-buy .buy-btn-sub{font-size:.75rem;font-weight:600;opacity:.75;letter-spacing:.06em;text-transform:uppercase}
.btn-buy.busy{opacity:.7;pointer-events:none}
.buy-fine{font-size:.8rem;color:var(--ink-soft);text-align:center;margin-top:12px}
.buy-error{background:#fdecec;border:1px solid #f2b8b5;color:#8a1f1a;border-radius:10px;padding:10px 14px;font-size:.85rem;margin-top:12px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:0 0 30px}
.btn-ghost-light{border:2px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff}

/* sticky mobile buy bar */
.mobile-buy-bar{position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;align-items:center;gap:12px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-top:1px solid var(--line);box-shadow:0 -8px 24px -12px rgba(11,46,79,.25)}
.mobile-buy-bar .mb-price{font-weight:800;font-size:1.05rem;color:var(--ink);line-height:1.1}
.mobile-buy-bar .mb-price small{display:block;font-size:.68rem;font-weight:600;color:var(--aqua-deep)}
.mobile-buy-bar .btn{flex:1;justify-content:center;padding:12px 18px;font-size:.95rem;margin:0}
@media(max-width:700px){
  .mobile-buy-bar.show{display:flex}
  body{padding-bottom:76px}
  .buy-grid{grid-template-columns:1fr;gap:26px}
  .buy-media{max-width:420px;margin:0 auto;width:100%}
  .buy-panel{padding:24px 20px}
  .color-row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:420px){.color-row{grid-template-columns:repeat(2,1fr)}.color-chip span{font-size:.8rem}}

/* ============ media aspect-ratio safety ============ */
/* never stretch, never crop: every img keeps its intrinsic ratio */
.hero-media img,.buy-media img{width:auto;max-width:100%;height:auto;margin:0 auto}
.gallery img{width:100%;height:auto}
img,video{max-width:100%;height:auto}

/* ============ CSR CHAT WIDGET ============ */
.csr-launch{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:120;display:inline-flex;align-items:center;gap:9px;border:0;cursor:pointer;background:var(--ink);color:#fff;font-weight:700;font-size:.92rem;padding:13px 20px;border-radius:999px;box-shadow:0 12px 30px -10px rgba(11,46,79,.55);font-family:inherit}
.csr-launch:hover{background:#123f68}
.csr-dot{width:9px;height:9px;border-radius:50%;background:#43d6a4;box-shadow:0 0 0 3px rgba(67,214,164,.25)}
.csr-panel{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:121;width:min(360px,calc(100vw - 36px));height:min(520px,calc(100vh - 90px - env(safe-area-inset-bottom)));background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 80px -20px rgba(11,46,79,.45);display:none;flex-direction:column;overflow:hidden;transform:translateY(12px);opacity:0;transition:transform .22s ease,opacity .22s ease}
.csr-panel.open{display:flex;transform:none;opacity:1}
.csr-head{display:flex;align-items:center;gap:11px;padding:14px 16px;background:var(--ink);color:#fff;flex:0 0 auto}
.csr-avatar{width:34px;height:34px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#3fc1c9,#0b2e4f);display:inline-flex;border:2px solid rgba(255,255,255,.35);flex:0 0 auto}
.csr-head-txt{display:flex;flex-direction:column;line-height:1.25;flex:1;min-width:0}
.csr-head-txt small{color:#9fc7dd;font-size:.72rem}
.csr-close{background:none;border:0;color:#cfe3ef;font-size:1.35rem;line-height:1;cursor:pointer;padding:2px 6px;border-radius:8px}
.csr-close:hover{background:rgba(255,255,255,.12);color:#fff}
.csr-log{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:9px;background:#fbfdfe;-webkit-overflow-scrolling:touch}
.csr-msg{max-width:86%;padding:10px 13px;border-radius:14px;font-size:.9rem;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}
.csr-a{background:#e8f2f7;color:var(--ink);border-bottom-left-radius:4px;align-self:flex-start}
.csr-u{background:var(--ink);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.csr-typing{opacity:.65;font-style:italic}
.csr-form{flex:0 0 auto;padding:10px 12px calc(10px + env(safe-area-inset-bottom)*0.4);display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--line);background:#fff}
.csr-form input{font-family:inherit}
.csr-form input[type=email]{border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:.82rem;color:var(--ink-soft);background:#fbfdfe}
.csr-row{display:flex;gap:8px}
.csr-row input{flex:1;border:1.5px solid var(--line);border-radius:999px;padding:11px 16px;font-size:.95rem;color:var(--ink);min-width:0}
.csr-row input:focus{outline:none;border-color:var(--aqua)}
.csr-send{border:0;background:var(--ink);color:#fff;font-weight:700;border-radius:999px;padding:0 20px;cursor:pointer;font-size:.9rem}
.csr-send:hover{background:#123f68}
.csr-honey{position:absolute;left:-9999px;top:-9999px;height:0;width:0;overflow:hidden}
@media(max-width:700px){
  .csr-launch{right:14px;bottom:calc(88px + env(safe-area-inset-bottom))}
  .csr-panel{right:8px;left:8px;bottom:calc(8px + env(safe-area-inset-bottom));width:auto;height:min(560px,calc(100vh - 120px))}
  .mobile-buy-bar.show ~ .csr-launch{bottom:calc(88px + env(safe-area-inset-bottom))}
}
@media(min-width:701px){.csr-launch{bottom:18px}}