/* 海日和 — a day beneath the surface */
:root{color-scheme:dark;--night:#040c15;--navy:#071523;--cyan:#3ed9e8;--white:#f3f7fa;--muted:#9aaebf;--paper:#f4f6f5;--ink:#102330;--line:rgba(167,194,211,.18);--font:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif;--numbers:"Arial Narrow","Helvetica Neue",Arial,sans-serif;--pad:clamp(24px,5vw,88px)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--night);color:var(--white);font:16px/1.85 var(--font);-webkit-font-smoothing:antialiased}body.menu-open{overflow:hidden}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}a{color:inherit;text-decoration:none}button,a,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:6px}img{display:block;width:100%;height:auto}button{color:inherit}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-weight:700;line-height:1.25;letter-spacing:-.045em;word-break:keep-all;overflow-wrap:anywhere}h2{font-size:clamp(38px,5.3vw,76px)}h3{font-size:24px}::selection{background:#3ed9e8;color:#071523}.wrap{width:min(100%,1440px);margin:auto;padding-inline:var(--pad)}.eyebrow{font:600 12px/1.4 var(--numbers);letter-spacing:.23em;text-transform:uppercase;color:var(--cyan)}.body-copy{font-size:clamp(15px,1.3vw,18px);color:var(--muted);line-height:2}.section-copy{max-width:510px}.section-copy .body-copy{margin-top:26px}.section-copy h2{margin-top:22px}.quiet-link{display:inline-flex;gap:16px;align-items:center;color:var(--cyan);font-size:14px;font-weight:700}.quiet-link span{transition:transform .25s}.quiet-link:hover span{transform:translateX(5px)}.skip-link{position:fixed;left:20px;top:-100px;z-index:100;background:var(--cyan);color:var(--navy);padding:10px 20px;border-radius:30px}.skip-link:focus{top:12px}
/* Navigation */
.site-head{position:absolute;inset:0 0 auto;z-index:50;border-bottom:1px solid transparent;transition:background .3s,border-color .3s}.site-head.scrolled{position:fixed;background:rgba(4,12,21,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-color:var(--line)}.head-inner{min-height:88px;display:flex;align-items:center;gap:40px}.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}.brand svg{width:34px;height:34px;color:var(--cyan)}.brand-name{font-size:25px;line-height:1.2;font-weight:700;letter-spacing:.12em}.brand-name small{display:block;margin-top:5px;font:600 9px/1 var(--numbers);letter-spacing:.39em}.nav{margin-left:auto;display:flex;gap:30px;align-items:center}.nav a{font-size:12px;color:#c7d2db;transition:color .2s}.nav a:hover,.nav a[aria-current]{color:var(--cyan)}.nav .nav-status{font-size:12px;display:flex;gap:7px;align-items:center;border-left:1px solid var(--line);padding-left:25px}.nav-status i{width:5px;height:5px;border-radius:50%;background:var(--cyan)}.menu-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:transparent;align-items:center;justify-content:center;flex-direction:column;gap:5px}.menu-toggle span{width:17px;height:1px;background:var(--white);transition:transform .25s}.menu-toggle[aria-expanded=true] span:first-child{transform:translateY(3px) rotate(45deg)}.menu-toggle[aria-expanded=true] span:last-child{transform:translateY(-3px) rotate(-45deg)}
.site-head{position:fixed;background:rgba(4,12,21,.38);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.hero-actions .button{position:relative;z-index:1;background-color:#3ed9e8;min-width:148px}
/* Hero */
.hero{position:relative;isolation:isolate;min-height:clamp(800px,66vw,1080px);overflow:hidden;background:#020b13}.hero-art{position:absolute;inset:0;z-index:-2;overflow:hidden}.hero-art img{width:100%;height:100%;object-fit:cover;object-position:50% 48%;transform:scale(var(--hero-scale,1.015));will-change:transform}.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(2,10,18,.55),transparent 55%),linear-gradient(0deg,#040c15 1%,transparent 22%);pointer-events:none}.hero-main{padding-top:clamp(210px,18vw,285px);padding-bottom:170px}.hero-copy{width:46%;max-width:610px}.hero h1{font-size:clamp(64px,7.4vw,112px);line-height:1.18;letter-spacing:-.055em;margin-top:30px}.hero .tagline{font-size:clamp(15px,1.55vw,22px);margin-top:26px;letter-spacing:.025em;white-space:nowrap}.hero .eyebrow{color:#9bc4d4;font-size:12px;letter-spacing:.16em}.hero-actions{display:flex;align-items:center;gap:25px;margin-top:40px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;min-height:52px;padding:12px 27px;border-radius:999px;background:var(--cyan);color:#03222d;font-size:14px;font-weight:700;transition:background .25s,transform .25s;white-space:nowrap}.button:hover{background:#8beaf2;transform:translateY(-2px)}.button .arrow{font:24px/1 var(--numbers)}.hero-status{font-size:12px;color:#bac8d3;border-left:1px solid #47606e;padding-left:22px;white-space:nowrap}.hero-note{font-size:12px;color:#8097a8;margin-top:25px;line-height:1.7}.hero-bottom{position:absolute;left:0;right:0;bottom:37px}.hero-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:35px}.hero-bottom p{font-size:clamp(19px,2.6vw,36px);font-weight:700;letter-spacing:-.04em}.chapter-links{display:flex;gap:26px}.chapter-links a{display:flex;gap:9px;align-items:center;font-size:12px;color:#b9c7d1;white-space:nowrap}.chapter-links b{font-family:var(--numbers);font-size:16px;font-weight:500;color:var(--cyan)}.scroll-cue{display:flex;align-items:center;gap:10px;font:12px var(--numbers);letter-spacing:.16em;color:#879fb0}.scroll-cue i{width:34px;height:1px;background:#6a8a9c}
/* Chapters */
.chapter-intro{padding-block:95px 115px;text-align:center}.chapter-intro h2{font-size:clamp(31px,4.3vw,61px);margin-top:22px}.chapter-intro .body-copy{max-width:650px;margin:24px auto 0;font-size:15px}.chapter-intro .line{width:1px;height:62px;background:linear-gradient(var(--cyan),transparent);margin:42px auto 0}.chapter-number{font:500 12px var(--numbers);letter-spacing:.2em;color:#8294a1;display:flex;align-items:center;gap:16px}.chapter-number::before{content:"";width:28px;height:1px;background:currentColor}.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:8%}.light{background:var(--paper);color:var(--ink);color-scheme:light}.light .body-copy{color:#5a6d78}.light .eyebrow{color:#198693}.plan{padding-block:130px 145px;overflow:hidden;position:relative}.plan .section-copy{max-width:520px}.plan h2 em{font-style:normal;color:#168b98}.feature-line{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:29px;font-size:12px;color:#55717f}.feature-line span{display:flex;align-items:center;gap:7px}.feature-line span::before{content:"";width:4px;height:4px;border-radius:50%;background:#239eaa}.detail-disclosure{border-top:1px solid rgba(30,62,80,.18);margin-top:28px}.detail-disclosure summary{font-size:13px;font-weight:600;padding:18px 30px 18px 0;cursor:pointer;position:relative;list-style:none}.detail-disclosure summary::-webkit-details-marker{display:none}.detail-disclosure summary::after{content:"+";position:absolute;right:3px;font:22px var(--numbers);top:14px}.detail-disclosure[open] summary::after{content:"−"}.detail-disclosure p{font-size:13px;color:#5a6d78;padding-bottom:20px;line-height:1.9}.art-caption{font-size:12px;color:#7d919d;text-align:center;margin-top:35px}
/* The dive photo */
.dive{position:relative;isolation:isolate;min-height:850px;overflow:hidden;background:#021322}.dive-art{position:absolute;inset:0;z-index:-2}.dive-art img{width:100%;height:100%;object-fit:cover;object-position:center;transform:scale(1.04) translateY(var(--dive-y,0px));will-change:transform}.dive::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(1,12,23,.76),rgba(1,12,23,.12) 55%),linear-gradient(0deg,rgba(2,14,24,.8),transparent 36%)}.dive .wrap{padding-top:145px;padding-bottom:130px}.dive h2{font-size:clamp(57px,6.2vw,91px);margin-top:30px}.dive .section-copy{max-width:520px}.dive .body-copy{color:#b8cdd9;max-width:390px;margin-top:30px;font-size:15px}.dive .chapter-number{color:#78b2c7}.dive-facts{display:flex;gap:45px;margin-top:45px}.dive-facts>div+div{border-left:1px solid #4e7081;padding-left:40px}.dive-facts b{font:500 43px var(--numbers);letter-spacing:-.04em;line-height:1}.dive-facts b small{font-size:17px;margin-left:3px}.dive-facts span{display:block;font-size:12px;color:#9fbac9;margin-top:8px}.dive .quiet-link{margin-top:32px}.dive-notice{position:absolute;bottom:27px;right:var(--pad);font-size:12px;color:#809eac}.dive-details{background:#071724;padding:38px var(--pad);border-bottom:1px solid var(--line)}.dive-details-inner{width:min(100%,1240px);margin:auto}.dive-details .detail-disclosure{border-color:var(--line);margin-top:0}.dive-details .detail-disclosure summary{font-size:15px;padding-block:14px}.dive-details .detail-disclosure p{color:#9fb4c2;max-width:820px}.dive-details ul{display:grid;grid-template-columns:1fr 1fr;gap:16px 50px;margin:10px 0 30px;padding-left:18px;color:#9fb4c2;font-size:13px;line-height:1.9}
/* Surface / log */
.surface{padding-block:145px;overflow:hidden;background:#eaf1f2}.surface .split{gap:11%}.surface h2{font-size:clamp(38px,4.8vw,67px)}.demo-caption{font-size:12px;line-height:1.8;color:#819aa9;margin-top:24px}.surface .quiet-link{color:#168794;margin-top:25px}.log{padding-block:130px 150px;background:#f7f8f6;color:var(--ink);overflow:hidden}.log-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:70px}.log-intro>div:first-child{flex:1}.log-intro h2{margin-top:22px}.log-intro .body-copy{color:#5a6d78;max-width:370px;font-size:15px}.log .eyebrow{color:#198693}.log-gallery{display:grid;grid-template-columns:1.35fr 1fr;gap:25px;margin-top:60px}.log-profile{background:#0a1d2d;border-radius:24px;color:#edf4f9;padding:38px 40px;overflow:hidden;position:relative}.log-profile-head{display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:12px;color:#809bac}.log-profile h3{font-size:23px;letter-spacing:-.03em;margin-top:7px;font-weight:500}.profile-chart{width:100%;height:auto;margin-top:35px;overflow:visible}.chart-label{font-family:var(--numbers);font-size:12px;fill:#7795a8}.chart-grid{stroke:#284357;stroke-width:.5}.profile-path{stroke:#43dce4;fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}.chart-area{fill:url(#profile-fill)}.profile-stats{display:flex;gap:35px;margin-top:30px}.profile-stats b{font:500 31px/1.3 var(--numbers);letter-spacing:-.04em}.profile-stats b small{font:12px var(--font);color:#adc0cc;margin-left:4px}.profile-stats span{display:block;font-size:12px;color:#7795a8;margin-top:4px}.profile-foot{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#7996a7;margin-top:30px;padding-top:19px;border-top:1px solid #233c4f}.play-preview{border:1px solid #41687e;border-radius:50%;width:33px;height:33px;background:transparent;color:#a8d8e8;display:grid;place-items:center;cursor:pointer;font-size:12px;transition:background .2s}.play-preview:hover{background:#25475e}.profile-marker{stroke:#c6f7f9;stroke-width:1;opacity:.7}.profile-dot{fill:#aef9fb}.log-photo{position:relative;background:#082635;border-radius:24px;overflow:hidden;min-height:400px}.log-photo img{width:100%;height:100%;object-fit:cover;object-position:50% 34%;transition:transform .8s}.log-photo:hover img{transform:scale(1.035)}.log-photo-caption{position:absolute;bottom:0;left:0;right:0;padding:70px 28px 25px;color:#e8f2f6;font-size:13px;background:linear-gradient(transparent,#071927e6)}.log-photo-caption small{display:block;font-size:12px;color:#9eb7c4;margin-top:4px}.log-footnote{display:flex;justify-content:space-between;gap:25px;margin-top:25px;font-size:12px;color:#728b98}.log-footnote a{color:#168794}.trust-strip{display:flex;align-items:flex-start;gap:20px;margin-top:55px;padding-top:35px;border-top:1px solid #d8e2e5}.trust-strip svg{width:26px;height:26px;flex-shrink:0;color:#258f99;margin-top:3px}.trust-strip h3{font-size:19px;letter-spacing:-.02em}.trust-strip p{font-size:13px;color:#6f8491;max-width:780px;margin-top:10px}
/* Sea map */
.seamap{padding-block:145px;background:#071723;overflow:hidden}.seamap .split{gap:8%}.seamap h2{font-size:clamp(42px,5vw,71px)}.seamap .body-copy{font-size:15px}.seamap .button{margin-top:32px;font-size:13px;min-height:48px}.map-visual{position:relative;min-height:490px;border:1px solid #244252;border-radius:26px;overflow:hidden;background:#081b2c;box-shadow:0 35px 80px #0004}.map-visual img{height:490px;object-fit:cover;object-position:48% 52%;opacity:.92}.map-label{position:absolute;left:21px;top:21px;font:12px var(--numbers);letter-spacing:.16em;padding:8px 12px;background:#061725e6;border:1px solid #526e7f66;border-radius:20px;color:#b3d8e5}.map-caption{position:absolute;left:0;right:0;bottom:0;padding:75px 25px 24px;background:linear-gradient(transparent,#061725);font-size:12px;color:#b2c4cf}.map-caption span{display:inline-flex;align-items:center;gap:7px}.map-caption i{height:5px;width:5px;border-radius:50%;background:var(--cyan)}.map-caption small{display:block;font-size:12px;color:#7e9aaa;margin-top:5px}.map-features{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}.map-features span{padding:4px 10px;border:1px solid #274452;border-radius:20px;color:#9bb9c8;font-size:12px}
/* Preserved product information */
.product-info{background:#0a1926;border-top:1px solid var(--line)}.spec{padding-block:100px 70px}.spec h2,.faq h2{font-size:clamp(30px,3.4vw,45px);margin-top:17px}.spec dl{margin:35px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:0 55px}.spec .row{display:grid;grid-template-columns:100px 1fr;gap:20px;border-bottom:1px solid var(--line);padding:18px 0;font-size:12px}.spec dt{color:#718e9f}.spec dd{margin:0;color:#b0c2ce;line-height:1.9}.safety{padding-block:0 70px}.safety-box{border:1px solid #8c794740;background:#9c7b2509;padding:25px 30px;border-radius:16px;display:flex;align-items:flex-start;gap:20px}.safety-box svg{flex-shrink:0;width:24px;height:24px;margin-top:3px}.safety h2{font-size:15px;font-weight:500;color:#d0bb7c;letter-spacing:0}.safety ul{margin:13px 0 0;padding-left:17px;font-size:12px;color:#91a4b2;line-height:2}.faq{padding-block:15px 105px}.faq-list{margin-top:30px;max-width:950px}.faq details{border-bottom:1px solid var(--line)}.faq summary{list-style:none;position:relative;cursor:pointer;padding:22px 40px 22px 0;font-size:14px;color:#c8d7e1}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";position:absolute;right:5px;top:19px;font:24px var(--numbers);color:#7c9bad}.faq details[open] summary::after{content:"−"}.faq details p{padding:0 35px 25px 0;font-size:13px;color:#859eae;line-height:2}.closing{text-align:center;padding-block:115px 120px;background:radial-gradient(ellipse at 50% 0,#12394c,transparent 75%),#061420}.closing h2{font-size:clamp(35px,5vw,66px);margin-top:25px}.closing p{font-size:13px;color:#8dabbc;margin-top:25px}.closing .button{margin-top:30px;min-height:48px}.site-foot{border-top:1px solid var(--line);padding-block:40px 30px;background:#040d16}.footer-main{display:flex;align-items:center;justify-content:space-between;gap:30px}.site-foot .brand-name{font-size:20px}.site-foot .brand svg{width:28px}.foot-links{display:flex;flex-wrap:wrap;gap:12px 25px;font-size:12px;color:#7e99aa}.draft-note{font-size:12px;color:#526d80;margin-top:35px;line-height:1.8}.progress-line{position:fixed;left:0;top:0;width:100%;height:2px;background:var(--cyan);z-index:70;transform:scaleX(var(--progress,0));transform-origin:left;pointer-events:none}.reveal{opacity:1}.motion-ready .reveal{opacity:0;transform:translateY(25px);transition:opacity .9s,transform .9s}.motion-ready .reveal.is-visible{opacity:1;transform:none}
/* Tablet and phone */
@media(min-width:761px){.hero-art img{object-fit:contain;object-position:50% 50%}}
@media(min-width:1600px){.hero-main{padding-top:285px}.hero{min-height:1050px}}
@media(max-width:1100px){.head-inner{gap:20px}.nav{gap:20px}.nav .nav-status{display:none}.hero{min-height:820px}.hero-main{padding-top:245px}.hero h1{font-size:78px}.hero-copy{width:47%}.hero .tagline{font-size:16px}.hero-actions{gap:16px}.hero-status{padding-left:16px}.hero .button{padding-inline:23px;font-size:12px}.chapter-links{gap:16px}.scroll-cue{display:none}.dive{min-height:800px}.dive .section-copy{max-width:460px}.dive h2{font-size:65px}.dive .body-copy{max-width:330px}.plan,.surface,.log,.seamap{padding-block:100px}.log-gallery{grid-template-columns:1.25fr 1fr}.log-profile{padding:30px}.profile-stats{gap:25px}.profile-stats b{font-size:27px}.spec .row{grid-template-columns:80px 1fr;gap:15px}.map-visual,.map-visual img{min-height:430px;height:430px}}
@media(max-width:760px){:root{--pad:25px}html{scroll-padding-top:80px}.head-inner{min-height:75px}.brand-name{font-size:22px}.brand svg{width:29px}.menu-toggle{display:flex}.nav{display:none;position:absolute;left:0;right:0;top:74px;background:#061420fa;padding:24px var(--pad) 32px;flex-direction:column;align-items:stretch;gap:0;backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav.is-open{display:flex}.nav a{font-size:17px;padding:15px 0;border-bottom:1px solid var(--line)}.hero{min-height:0;padding-bottom:0}.hero-main{padding-top:134px;padding-bottom:0}.hero-copy{width:100%;max-width:none;position:relative;z-index:2}.hero .eyebrow{font-size:12px;letter-spacing:.13em}.hero h1{font-size:clamp(61px,12vw,88px);margin-top:22px;line-height:1.15}.hero .tagline{font-size:15px;margin-top:23px;white-space:normal}.hero-actions{margin-top:27px;gap:20px}.hero .button{font-size:12px;padding:11px 23px;min-height:47px;gap:18px}.hero-status{font-size:12px;padding-left:18px}.hero-note{font-size:12px;max-width:260px;margin-top:18px}.hero-art{position:relative;inset:auto;margin-top:-28px;height:410px;z-index:-1;overflow:hidden}.hero-art img{width:140%;height:100%;max-width:none;object-fit:cover;object-position:100% 50%;margin-left:-40%;transform:none;will-change:auto}.hero-art::after{content:"";position:absolute;inset:0;background:linear-gradient(#020b13 0%,transparent 20%,transparent 78%,#040c15 99%)}.hero::after{background:none}.hero-bottom{position:relative;bottom:auto;padding:0 0 32px;margin-top:-4px}.hero-bottom-inner{display:block}.hero-bottom p{font-size:22px;letter-spacing:-.045em}.chapter-links{gap:25px;margin-top:24px}.chapter-links a{font-size:12px}.chapter-links b{font-size:14px}.chapter-intro{padding-block:65px 65px}.chapter-intro h2{font-size:32px;line-height:1.45}.chapter-intro .body-copy{font-size:13px;line-height:2;max-width:380px;margin-top:21px}.chapter-intro .line{height:35px;margin-top:28px}.eyebrow{font-size:12px}.split{grid-template-columns:1fr;gap:42px}.section-copy{max-width:none}.section-copy h2{margin-top:20px}.section-copy .body-copy{font-size:14px;margin-top:22px}.chapter-number{font-size:12px}.plan{padding-block:72px 65px}.plan h2{font-size:42px;line-height:1.35}.feature-line{font-size:12px;gap:8px 18px}.art-caption{margin-top:27px;font-size:12px}.dive{min-height:0;display:flex;flex-direction:column}.dive .wrap{padding-top:75px;padding-bottom:0}.dive .section-copy{max-width:none}.dive h2{font-size:54px;line-height:1.3}.dive .body-copy{max-width:370px;font-size:14px}.dive-facts{gap:30px;margin-top:28px}.dive-facts>div+div{padding-left:30px}.dive-facts b{font-size:35px}.dive .quiet-link{font-size:12px;margin-top:25px}.dive-art{position:relative;inset:auto;height:405px;margin-top:5px;z-index:-1}.dive-art img{width:145%;max-width:none;height:100%;object-fit:cover;object-position:100% 50%;margin-left:-45%;transform:none;will-change:auto}.dive-art::after{content:"";position:absolute;inset:0;background:linear-gradient(#021322,transparent 22%,transparent 82%,#071724)}.dive::after{display:none}.dive-notice{position:relative;inset:auto;text-align:center;padding:0 20px 24px;font-size:12px;margin-top:-16px}.dive-details{padding:20px var(--pad)}.dive-details .detail-disclosure summary{font-size:13px}.dive-details ul{grid-template-columns:1fr;gap:13px;font-size:12px}.surface{padding-block:75px}.surface .split{gap:45px}.surface .section-copy{order:0}.surface h2{font-size:40px;line-height:1.35}.surface .quiet-link{font-size:12px}.log{padding-block:72px 75px}.log-intro{display:block}.log-intro h2{font-size:42px;line-height:1.35}.log-intro .body-copy{font-size:14px;margin-top:25px}.log-gallery{grid-template-columns:1fr;gap:18px;margin-top:35px}.log-profile{padding:25px 25px 22px;border-radius:20px}.log-profile h3{font-size:21px}.profile-chart{margin-top:30px}.profile-stats{gap:32px;margin-top:24px}.profile-stats b{font-size:29px}.log-photo{min-height:340px;max-height:450px;border-radius:20px}.log-photo img{height:390px;object-position:50% 39%}.log-footnote{flex-direction:column;gap:9px;font-size:12px}.trust-strip{margin-top:32px;padding-top:28px;gap:14px}.trust-strip h3{font-size:17px;line-height:1.6}.trust-strip p{font-size:12px}.seamap{padding-block:75px}.seamap h2{font-size:43px;line-height:1.35}.seamap .body-copy{font-size:14px}.map-visual,.map-visual img{height:370px;min-height:370px}.map-visual{border-radius:20px}.map-features span{font-size:12px}.spec{padding-block:65px 45px}.spec dl{grid-template-columns:1fr;margin-top:25px}.spec .row{grid-template-columns:80px 1fr;font-size:12px;padding:15px 0}.spec h2,.faq h2{font-size:32px}.safety{padding-bottom:45px}.safety-box{padding:23px 20px;gap:12px}.safety h2{font-size:13px}.safety-box svg{width:19px;height:19px}.safety ul{font-size:12px;line-height:2}.faq{padding-bottom:65px}.faq summary{font-size:12px;line-height:1.9;padding-block:19px}.faq details p{font-size:12px;padding-right:0}.closing{padding-block:75px 80px}.closing h2{font-size:40px;line-height:1.4}.closing p{font-size:12px}.footer-main{flex-direction:column;align-items:flex-start;gap:26px}.site-foot{padding-block:35px 25px}.foot-links{font-size:12px;gap:15px 22px}.draft-note{margin-top:25px;font-size:12px}}
@media(max-width:360px){:root{--pad:20px}.hero h1{font-size:57px}.hero .tagline{font-size:13px}.hero-actions{gap:12px}.hero .button{padding-inline:18px;font-size:12px}.hero-status{padding-left:12px;font-size:12px}.hero-art{height:360px}.hero-bottom p{font-size:20px}.chapter-links{gap:18px}.plan h2,.surface h2,.log-intro h2{font-size:37px}.dive h2{font-size:47px}.profile-stats{gap:23px}.profile-stats b{font-size:26px}.map-visual,.map-visual img{height:320px;min-height:320px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.motion-ready .reveal{opacity:1;transform:none}.hero-art img,.dive-art img{transform:none!important;will-change:auto}}

/* Photographic watch with crisp, editable surface-mode content. */
.surface { padding-block: 110px; }
.surface-visual {
  width: 100%;
  max-width: 440px;
  min-width: 0;
  margin: auto;
}
.surface-photo {
  position: relative;
  width: 100%;
  aspect-ratio: 2 / 3;
  container-type: inline-size;
}
.surface-photo > img {
  width: 100%;
  height: auto;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 14%, #000 86%, transparent),
    linear-gradient(transparent, #000 4%, #000 95%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 14%, #000 86%, transparent),
    linear-gradient(transparent, #000 4%, #000 95%, transparent);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}
.surface-screen {
  position: absolute;
  top: 28.1%;
  left: 22%;
  width: 52%;
  height: 41.2%;
  padding: 3.7% 4.2% 4%;
  overflow: hidden;
  border-radius: 18% / 16%;
  color: #edf4f6;
  font-size: 2.3cqw;
}
.surface-watch-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #8c9ea2;
  font-size: 2cqw;
  line-height: 1.3;
}
.surface-watch-status span:last-child { color: #d8e6e7; font: 500 2.5cqw var(--numbers); }
.surface-screen .eyebrow { margin-top: 3.5cqw; font-size: 1.9cqw; letter-spacing: .13em; }
.surface-timer {
  margin-top: 1cqw;
  color: #f0f8f8;
  font: 400 15.5cqw/1.1 var(--numbers);
  letter-spacing: -.055em;
  font-variant-numeric: tabular-nums;
}
.surface-timer-label { color: #95afb3; font-size: 2.3cqw; margin-top: .3cqw; }
.surface-screen .rest-divider { height: 1px; background: #c2d7da30; margin: 3.5cqw 0; }
.surface-screen .wait-row { display: flex; align-items: center; gap: 2.8cqw; }
.surface-screen .wait-ring {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 14cqw;
  height: 14cqw;
  border: .9cqw solid #263e43;
  border-top-color: #dfc861;
  border-right-color: #dfc861;
  border-radius: 50%;
  color: #f0da7e;
  font: 500 4.2cqw var(--numbers);
}
.surface-screen .wait-row > span { color: #9eb3b6; font-size: 2.2cqw; line-height: 1.55; }
.surface-screen .wait-row b { display: block; margin-top: .9cqw; color: #cad8da; font-size: 2cqw; font-weight: 400; }
.surface-visual .demo-caption { margin: 15px -10px 0; text-align: center; font-size: 12px; color: #748e97; line-height: 1.9; }
@media (max-width: 760px) {
  .surface { padding-block: 75px; }
  .surface .surface-visual { order: 1; max-width: 360px; }
  .surface-visual .demo-caption { margin: 15px 0 0; font-size: 12px; }
}

/* A quiet ocean study for the dive planner. */
.plan-art--ocean {
  position: relative;
  min-width: 0;
  padding: 24px 0 0;
}
.plan-study-heading {
  display: flex;
  justify-content: space-between;
  color: #728b95;
  font: 500 12px var(--numbers);
  letter-spacing: .17em;
}
.plan-study-heading span:last-child {
  color: #168b98;
}
.plan-ocean-visual {
  margin: -5px -9% -2%;
  aspect-ratio: 1.8;
}
.plan-ocean-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 11%, #000 89%, transparent),
    linear-gradient(transparent, #000 17%, #000 81%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 11%, #000 89%, transparent),
    linear-gradient(transparent, #000 17%, #000 81%, transparent);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}
.plan-study-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid #bfcfd3;
}
.plan-study-stats dt {
  color: #69808b;
  font-size: 12px;
  letter-spacing: .08em;
}
.plan-study-stats dd {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 5px 0 0;
  color: #174858;
  font: 400 clamp(36px, 3.7vw, 54px)/1.2 var(--numbers);
  letter-spacing: -.04em;
}
.plan-study-stats dd span {
  font-size: 14px;
  letter-spacing: 0;
  color: #66808c;
}
.plan-study-stats .plan-study-gas {
  flex-wrap: wrap;
  gap: 6px 9px;
  padding-top: 8px;
  font: 400 clamp(23px, 2.2vw, 31px)/1.4 var(--font);
  letter-spacing: .03em;
}
.plan-study-gas span {
  font: 400 12px var(--numbers);
  letter-spacing: .12em;
}
.plan-art--ocean .art-caption {
  margin-top: 25px;
  text-align: left;
}
@media (max-width: 760px) {
  .plan-art--ocean { padding-top: 4px; }
  .plan-study-heading { font-size: 12px; }
  .plan-ocean-visual { margin: 5px -11% 0; }
  .plan-study-stats { gap: 15px; padding-top: 20px; }
  .plan-study-stats dd { font-size: 40px; }
  .plan-study-stats .plan-study-gas { font-size: 25px; }
  .plan-study-stats dt { font-size: 12px; }
  .plan-study-stats dd span { font-size: 12px; }
  .plan-study-gas span { font-size: 12px; }
  .plan-art--ocean .art-caption { margin-top: 20px; }
}

/* Ocean-first opening: the app's world, without a hardware product shot. */
.hero--ocean {
  min-height: clamp(760px, 94svh, 960px);
}
.hero--ocean .hero-art img {
  object-fit: cover;
  object-position: 62% 36%;
  width: 100%;
  margin-left: 0;
}
.hero--ocean::after {
  background: linear-gradient(90deg, rgba(2,10,18,.24), transparent 66%),
    linear-gradient(0deg, #040c15, transparent 32%);
}
.hero--ocean .hero-main {
  padding-top: clamp(185px, 23svh, 255px);
  padding-bottom: 155px;
}
.hero--ocean .hero-copy {
  width: 65%;
  max-width: 730px;
}
.hero--ocean h1 {
  font-size: clamp(64px, 7.1vw, 104px);
}
.hero--ocean .hero-note {
  font-size: 14px;
  color: #a8c0ce;
  line-height: 1.9;
  margin-top: 26px;
  max-width: 420px;
}
@media (max-width: 1100px) and (min-width: 761px) {
  .hero--ocean .hero-copy { width: 75%; }
  .hero--ocean h1 { font-size: 80px; }
}
@media (max-width: 760px) {
  .hero--ocean { min-height: max(760px, 100svh); }
  .hero--ocean .hero-art { position: absolute; inset: 0; height: auto; margin-top: 0; z-index: -2; }
  .hero--ocean .hero-art img { object-position: 65% 25%; transform: none; }
  .hero--ocean .hero-art::after { display: none; }
  .hero--ocean::after {
    background: linear-gradient(90deg, rgba(2,10,18,.25), transparent),
      linear-gradient(0deg, #040c15, transparent 48%);
  }
  .hero--ocean .hero-main { padding-top: clamp(160px, 23svh, 200px); padding-bottom: 160px; }
  .hero--ocean .hero-copy { width: 100%; max-width: none; }
  .hero--ocean h1 { font-size: clamp(61px, 12vw, 88px); }
  .hero--ocean .hero-note { font-size: 13px; max-width: 100%; margin-top: 25px; }
  .hero--ocean .hero-bottom { position: absolute; bottom: 0; padding-bottom: 32px; margin-top: 0; }
}
@media (max-width: 360px) {
  .hero--ocean h1 { font-size: 57px; }
  .hero--ocean .hero-note { font-size: 12px; }
}


/* ---- 2026-11-14 の直し ---- */
/* 注意書きは本文と同じ大きさで読めるように */
.safety h2 { font-size: 18px; font-weight: 700; }
.safety ul { font-size: 15px; line-height: 1.9; color: #b9c8d2; }
.safety ul li + li { margin-top: 6px; }
.spec .row, .faq details p, .detail-disclosure p, .dive-details ul { font-size: 14px; }
.faq summary { font-size: 15px; }
.chart-label { font-size: 11px; }
@media (max-width: 760px) {
  .safety h2 { font-size: 16px; }
  .safety ul { font-size: 14px; }
  .spec .row, .faq details p, .detail-disclosure p, .dive-details ul { font-size: 13px; }
  .faq summary { font-size: 14px; }
}
/* 地図の章の見出し：「。」だけが次の行に落ちないように */
.seamap h2 { font-size: clamp(34px, 4.1vw, 60px); }
@media (max-width: 760px) { .seamap h2 { font-size: clamp(30px, 9.2vw, 36px); } }
/* 上のメニュー：一番上では透明、スクロールしたら濃い帯 */
.site-head { background: linear-gradient(rgba(4, 12, 21, .6), transparent); backdrop-filter: none; -webkit-backdrop-filter: none; }
.site-head.scrolled { background: rgba(4, 12, 21, .94); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }

/* 泡と光（ページ全体にうっすら重ねる） */
#sea-fx { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 40; pointer-events: none; opacity: .55; mix-blend-mode: screen; }

/* 水中の章：本物の Watch 画面 */
.dive .wrap { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 6%; }
.dive-art img { transform: scaleX(-1) scale(1.04) translateY(var(--dive-y, 0px)); }
.dive::after { background: linear-gradient(90deg, rgba(1, 12, 23, .72), rgba(1, 12, 23, .3)), linear-gradient(0deg, rgba(2, 14, 24, .85), transparent 40%); }
.dive-watch { width: clamp(240px, 26vw, 340px); margin-right: clamp(0px, 4vw, 70px); }
.watch-screen { container-type: inline-size; aspect-ratio: 422 / 514; border-radius: 21% / 17.5%; overflow: hidden; background: #000;
  box-shadow: 0 0 0 1px rgba(160, 220, 240, .22), 0 0 0 7px rgba(3, 10, 16, .85), 0 0 0 8px rgba(160, 220, 240, .14), 0 40px 90px rgba(0, 0, 0, .6), 0 0 120px rgba(62, 217, 232, .16); }
.watch-screen img { width: 100%; height: 100%; object-fit: cover; }
.dive-watch figcaption { margin-top: 20px; text-align: center; font-size: 12px; color: #9fbac9; }
.watch-live { width: 100%; height: 100%; display: flex; flex-direction: column; justify-content: space-between; padding: 6cqw 5cqw 7cqw; color: #fff; font-family: -apple-system, "SF Pro Rounded", "Helvetica Neue", var(--font); line-height: 1.15; font-variant-numeric: tabular-nums; }
.wl-time { text-align: right; font-size: 7.6cqw; font-weight: 600; }
.wl-depth { display: flex; align-items: baseline; gap: 2cqw; font-size: 9cqw; color: #9aa0a6; }
.wl-depth b { font-size: 12.5cqw; color: #fff; }
.wl-bars { margin-left: auto; align-self: center; display: flex; flex-direction: column; gap: .9cqw; }
.wl-bars span { display: block; width: 6.5cqw; height: 1.5cqw; background: #3a3a3c; border-radius: 1px; }
.wl-bars span.on { background: #ffd34a; }
.wl-ndl { display: flex; align-items: baseline; gap: 2cqw; }
.wl-ndl span { font-size: 5.6cqw; color: #b9bdc2; flex: 1; }
.wl-ndl b { font-size: 15cqw; color: #30d158; }
.wl-ndl b.stop { color: #ffd34a; font-size: 12cqw; }
.wl-ndl small { font-size: 6cqw; color: #b9bdc2; }
.wl-row { display: flex; justify-content: space-between; align-items: center; font-size: 6.2cqw; color: #b9bdc2; }
.wl-row b { font-size: 9.5cqw; color: #fff; font-weight: 600; }
.wl-rate { display: block; height: .9cqw; max-width: 22cqw; background: #30d158; border-radius: 2px; transition: width .25s; }
.wl-rate.fast { background: #ff9f0a; }
.wl-card { background: #1c1c1e; border-radius: 3.5cqw; padding: 2.4cqw 3cqw; font-size: 6.6cqw; color: #b9bdc2; }
.wl-card > div { display: flex; justify-content: space-between; }
.wl-card small { display: block; font-size: 4.2cqw; margin-top: .6cqw; color: #e5e5ea; }
@media (max-width: 760px) {
  .dive .wrap { display: block; padding-bottom: 70px; }
  .dive-art { position: absolute; inset: 0; height: auto; margin-top: 0; z-index: -2; }
  .dive-art img { width: 100%; margin-left: 0; object-position: 50% 30%; transform: scaleX(-1); }
  .dive-art::after { display: none; }
  .dive::after { display: block; background: linear-gradient(rgba(1, 12, 23, .78), rgba(1, 12, 23, .35) 60%, #071724); }
  .dive-watch { width: min(250px, 68vw); margin: 48px auto 0; }
  .dive-notice { margin-top: 0; }
}

/* 水面の章：本物の iPhone 画面 */
.phone-shot { position: relative; width: min(100%, 300px); margin: auto; border-radius: 12.5% / 5.8%; overflow: hidden; background: #071523;
  box-shadow: 0 0 0 1px rgba(16, 35, 48, .18), 0 0 0 7px #0b141c, 0 40px 80px rgba(16, 45, 60, .28); }
.phone-shot img { width: 100%; height: auto; }
.phone-shot .pl { position: absolute; inset: 0; width: 100%; height: 100%; }
.pl text { font-family: -apple-system, "SF Pro Display", "Helvetica Neue", Arial, sans-serif; font-weight: 700; fill: #f3f7fa; font-variant-numeric: tabular-nums; }
.pl-rest { font-size: 66px; letter-spacing: -1px; }
.pl-wait { font-size: 36px; }

/* 海の地図：風の流れ */
.windbox { position: relative; max-width: 680px; margin: 70px auto 0; border: 1px solid #244252; border-radius: 26px; overflow: hidden; background: #081a2b; }
.windbox canvas { display: block; width: 100%; aspect-ratio: 22.1 / 22; }
.windbox figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 60px 25px 22px; background: linear-gradient(transparent, #061725); font-size: 12px; color: #b2c4cf; }
.windbox figcaption b { display: block; font-size: 17px; color: #e8f2f6; margin-bottom: 4px; }
.windbox.wind-failed { display: none; }
@media (max-width: 760px) { .windbox { margin-top: 45px; margin-inline: auto; border-radius: 20px; } }
@media (prefers-reduced-motion: reduce) { .dive-art img { transform: scaleX(-1) !important; } }

.button.is-soon { background: transparent; color: #9bb9c8; border: 1px solid #36586a; cursor: default; }
.button.is-soon:hover { background: transparent; transform: none; }