:root{--ink:#111827;--muted:#5f6b7a;--paper:#f7f8fa;--white:#fff;--line:#dfe4ea;--blue:#2357d9;--cyan:#35c5f0;--red:#ef4e55;--navy:#091a33;--radius:18px;--shadow:0 18px 50px rgba(9,26,51,.09);font-family:"Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.75}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);overflow-wrap:anywhere}img{max-width:100%;height:auto}a{color:var(--blue);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}.screen-reader-text{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:16px;top:-100px;z-index:10000;background:#fff;color:#000;padding:10px 16px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:1000;background:rgba(247,248,250,.92);border-bottom:1px solid rgba(17,24,39,.08);backdrop-filter:blur(18px)}.site-header__inner{max-width:1240px;min-height:82px;margin:auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand__logo .custom-logo-link{display:block;line-height:0}.brand__logo img{width:48px;height:48px;object-fit:contain}.brand__mark{display:grid;place-items:center;width:44px;height:44px;background:var(--ink);color:#fff;border-radius:12px;font:bold 22px/1 Georgia,serif}.brand__text{display:flex;flex-direction:column;line-height:1.2}.brand__text strong{font-size:1.12rem;letter-spacing:.02em}.brand__text small{margin-top:4px;color:var(--muted);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase}.site-nav__list{display:flex;align-items:center;gap:8px;margin:0;padding:0;list-style:none}.site-nav__list a{display:block;padding:10px 12px;color:var(--ink);font-size:.88rem;font-weight:700;text-decoration:none;border-radius:9px}.site-nav__list a:hover,.site-nav__list .current-menu-item>a,.site-nav__list .current-menu-ancestor>a{background:#e9eefb;color:var(--blue)}.site-nav__list .menu-item-has-children{position:relative}.site-nav__list .sub-menu{position:absolute;top:100%;left:0;min-width:250px;margin:4px 0 0;padding:8px;list-style:none;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}.site-nav__list li:hover>.sub-menu,.site-nav__list li:focus-within>.sub-menu{opacity:1;visibility:visible;transform:none}.nav-toggle{display:none;width:44px;height:44px;padding:10px;border:0;background:transparent}.nav-toggle span:not(.screen-reader-text){display:block;height:2px;margin:5px 0;background:var(--ink)}.site-main{min-height:60vh}.content-shell{width:min(1120px,calc(100% - 40px));margin:0 auto}.content-shell--page{width:min(1160px,calc(100% - 40px));padding:64px 0 96px}.content-shell--article{width:min(820px,calc(100% - 40px));padding:72px 0 100px}.eyebrow{margin:0 0 8px;color:var(--blue);font:800 .75rem/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.16em;text-transform:uppercase}.home-hero{min-height:650px;padding:90px max(24px,calc((100vw - 1180px)/2));display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);align-items:center;gap:70px;color:#fff;background:radial-gradient(circle at 75% 20%,rgba(53,197,240,.25),transparent 27%),linear-gradient(135deg,#07152a 0%,#0c2851 65%,#123a72 100%);overflow:hidden}.home-hero h1{margin:.15em 0 .4em;font-size:clamp(3rem,7vw,6.5rem);line-height:.98;letter-spacing:-.055em}.home-hero h1 span{color:var(--cyan)}.home-hero .eyebrow{color:#77dcfa}.home-hero__lead{max-width:680px;color:#c5d3e5;font-size:clamp(1rem,1.7vw,1.25rem)}.home-hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 22px;border:1px solid transparent;border-radius:999px;font-weight:800;text-decoration:none;transition:transform .2s,box-shadow .2s,background .2s}.button:hover{transform:translateY(-2px)}.button--primary{background:var(--cyan);color:#06182c;box-shadow:0 10px 30px rgba(53,197,240,.22)}.button--ghost{border-color:rgba(255,255,255,.35);color:#fff}.button--ghost:hover{background:rgba(255,255,255,.1)}.button--ghost-dark{border-color:var(--line);background:#fff;color:var(--ink)}.home-hero__code{position:relative;padding:26px;border:1px solid rgba(255,255,255,.16);border-radius:22px;background:rgba(2,13,27,.45);box-shadow:0 30px 80px rgba(0,0,0,.28);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;transform:rotate(1.5deg)}.home-hero__code:before{content:"";display:block;width:9px;height:9px;margin-bottom:22px;border-radius:50%;background:#ff6b6b;box-shadow:17px 0 #ffd166,34px 0 #4dd4a8}.home-hero__code span{color:#91a8c5}.home-hero__code strong{float:right;color:#5de1ad;font-size:.8rem}.home-hero__code code{display:block;margin-top:18px;color:#bfeafa;font-size:clamp(.85rem,1.3vw,1.05rem);line-height:2}.home-section{padding-top:100px;padding-bottom:110px}.section-heading{max-width:720px;margin-bottom:42px}.section-heading h2{margin:.1em 0;font-size:clamp(2rem,4vw,3.35rem);line-height:1.1;letter-spacing:-.035em}.section-heading>p:last-child{color:var(--muted)}.app-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.app-card{position:relative;min-height:455px;padding:42px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.app-card:after{content:"";position:absolute;width:230px;height:230px;right:-70px;bottom:-80px;border:40px solid currentColor;border-radius:50%;opacity:.06}.app-card--reader{background:#fff;color:var(--navy);border:1px solid var(--line)}.app-card--natm{background:linear-gradient(145deg,#173c97,#2357d9);color:#fff}.app-card__index{position:absolute;right:30px;top:25px;font:bold 4rem/1 ui-monospace,monospace;opacity:.09}.app-card__icon{display:grid;place-items:center;width:70px;height:70px;margin-bottom:34px;border-radius:18px;background:var(--navy);color:#fff;font:bold 1.7rem/1 Georgia,serif}.app-card--natm .app-card__icon{background:#fff;color:var(--blue)}.app-card--naim{background:linear-gradient(145deg,#0e7490,#0891b2);color:#fff}.app-card--naim .app-card__icon{background:#fff;color:#0e7490}.app-card__platform{font:800 .72rem/1.4 ui-monospace,monospace;letter-spacing:.14em;opacity:.7}.app-card h3{margin:.2em 0 .45em;font-size:clamp(2rem,3vw,3rem);line-height:1.05;letter-spacing:-.035em}.app-card>p:not(.app-card__platform){max-width:540px;opacity:.8}.app-card__links{position:absolute;left:42px;right:42px;bottom:38px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}.app-card__links a{font-weight:800;color:inherit}.home-updates{background:#eef1f5}.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.post-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:14px;transition:transform .2s,box-shadow .2s}.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.post-card__link{display:flex;flex-direction:column;height:100%;min-height:300px;padding:26px;color:var(--ink);text-decoration:none}.post-card__meta{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font:700 .7rem/1.4 ui-monospace,monospace;text-transform:uppercase}.post-card__meta span{color:var(--blue)}.post-card h2{margin:.7em 0 .5em;font-size:1.28rem;line-height:1.45}.post-card__link>p:not(.post-card__meta){color:var(--muted);font-size:.9rem}.post-card__more{margin-top:auto;padding-top:16px;color:var(--blue);font-weight:800}.home-updates__more{text-align:center;margin-top:42px}.archive-header{padding:72px 0 36px}.archive-header h1{margin:.1em 0;font-size:clamp(2.2rem,5vw,4rem);line-height:1.1}.archive-header+.post-grid{padding-bottom:50px}.navigation.pagination{padding:20px 0 80px}.nav-links{display:flex;gap:8px;justify-content:center}.page-numbers{padding:8px 13px;background:#fff;border:1px solid var(--line);border-radius:8px;text-decoration:none}.page-numbers.current{background:var(--blue);color:#fff}.entry-header{margin-bottom:42px;padding-bottom:28px;border-bottom:1px solid var(--line)}.entry-header h1{margin:.1em 0;font-size:clamp(2.25rem,5vw,4.7rem);line-height:1.12;letter-spacing:-.04em}.entry-parent{display:inline-block;margin-top:14px}.entry-meta{color:var(--muted)}.entry-content{font-size:1rem}.entry--post .entry-content{font-size:1.08rem;line-height:2}.entry-content h2,.entry-content h3,.entry-content h4{line-height:1.35;scroll-margin-top:110px}.entry-content h2{margin-top:2em;font-size:2rem}.entry-content h3{margin-top:1.8em;font-size:1.5rem}.entry-content p{margin:1.1em 0}.entry-content blockquote{margin:2em 0;padding:10px 22px;border-left:4px solid var(--blue);background:#eef2fb}.entry-content pre{max-width:100%;padding:20px;overflow:auto;background:#0d1b2e;color:#d5edff;border-radius:12px}.entry-content table{width:100%;border-collapse:collapse}.entry-content th,.entry-content td{padding:10px;border:1px solid var(--line)}.entry-content input,.entry-content textarea,.entry-content select{max-width:100%;padding:12px;border:1px solid #b9c2ce;border-radius:8px;background:#fff;font:inherit}.entry-content textarea{width:100%}.entry-content button,.entry-content input[type=submit]{padding:12px 22px;border:0;border-radius:999px;background:var(--blue);color:#fff;font-weight:800}.entry-footer{margin-top:60px;padding-top:24px;border-top:1px solid var(--line)}.error-page{padding:15vh 0}.error-page h1{font-size:clamp(2.5rem,7vw,5rem)}.site-footer{padding:60px 24px 24px;background:#061325;color:#b7c5d8}.site-footer__inner{max-width:1180px;margin:auto;display:grid;grid-template-columns:1fr auto;gap:36px}.site-footer strong{color:#fff;font-size:1.2rem}.site-footer nav{display:flex;gap:18px}.site-footer a{color:#dce9f7}.site-footer__copy{max-width:1180px;margin:40px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:.75rem}.footer-widget__title{color:#fff}.custom-logo-link{display:inline-block}
@media(max-width:900px){.home-hero{grid-template-columns:1fr;min-height:auto;padding-top:70px;padding-bottom:70px}.home-hero__code{max-width:520px}.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.site-header__inner{min-height:70px;padding:0 18px}.brand__text small{display:none}.nav-toggle{display:block}.site-nav{position:absolute;left:14px;right:14px;top:68px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);display:none}.site-nav.is-open{display:block}.site-nav__list{display:block}.site-nav__list a{padding:12px}.site-nav__list .sub-menu{position:static;display:none;margin:0;padding:0 0 0 16px;border:0;box-shadow:none;opacity:1;visibility:visible;transform:none}.site-nav__list .submenu-open>.sub-menu{display:block}.app-grid{grid-template-columns:1fr}.app-card{min-height:430px}.site-footer__inner{grid-template-columns:1fr}}
@media(max-width:600px){.content-shell,.content-shell--page,.content-shell--article{width:min(100% - 28px,1120px)}.home-hero{padding-left:20px;padding-right:20px}.home-hero h1{font-size:3.25rem}.home-section{padding-top:70px;padding-bottom:75px}.app-card{padding:28px;min-height:470px}.app-card__links{left:28px;right:28px;bottom:28px;align-items:flex-start;flex-direction:column;gap:8px}.post-grid{grid-template-columns:1fr}.entry-header h1{font-size:2.35rem}.site-footer nav{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* Keep decorative card artwork from intercepting the application links. */
.app-card::after{pointer-events:none}
.app-card__links{z-index:1}

@media(min-width:901px){.app-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.app-card{min-height:520px;padding:34px}.app-card__links{left:34px;right:34px}.app-card h3{font-size:clamp(1.8rem,2.4vw,2.65rem)}}

/* Hero typography: keep kanji dominant and give kana a lighter rhythm. */
.home-hero h1 .hero-line-accent{color:var(--cyan)}
.home-hero h1 .hero-kanji{font-size:1em;color:inherit}
.home-hero h1>.hero-kanji{color:#fff}
.home-hero h1 .hero-kana{display:inline-block;font-size:.78em;font-weight:800;letter-spacing:-.035em;transform:translateY(-.035em)}
.home-hero h1 .hero-kana--katakana{padding:0 .08em;border-bottom:.08em solid rgba(255,255,255,.42);letter-spacing:-.065em}
.home-hero h1 .hero-kana--accent{margin-left:.05em;color:var(--cyan);text-shadow:0 0 24px rgba(53,197,240,.42)}
.home-hero h1 .hero-punctuation{font-size:.72em;font-weight:700;opacity:.65}

/* NATM manual video links and modal player. */
.natm-page .natm-video-link{display:inline-flex;align-items:center;gap:.65em;margin:14px 0 8px;padding:11px 18px;border:1px solid var(--natm-primary);border-radius:999px;background:#fff;color:var(--natm-primary-dark);font-weight:800;text-decoration:none;box-shadow:0 6px 18px rgba(47,127,224,.12);transition:transform .18s ease,background .18s ease,color .18s ease}
.natm-page .natm-video-link::before{content:"▶";display:grid;place-items:center;width:1.7em;height:1.7em;border-radius:50%;background:var(--natm-primary);color:#fff;font-size:.72em}
.natm-page .natm-video-link:hover{transform:translateY(-2px);background:var(--natm-primary);color:#fff;text-decoration:none}
.natm-page .natm-video-link:hover::before{background:#fff;color:var(--natm-primary)}
.natm-video-open{overflow:hidden}
.natm-video-overlay[hidden]{display:none}
.natm-video-overlay{position:fixed;inset:0;z-index:10000;display:grid;place-items:center;padding:24px;background:rgba(4,12,25,.76);backdrop-filter:blur(3px);cursor:zoom-out}
.natm-video-dialog{width:min(1100px,94vw);max-height:92vh;overflow:hidden;border:1px solid rgba(255,255,255,.22);border-radius:16px;background:#07101e;box-shadow:0 30px 100px rgba(0,0,0,.55);cursor:default}
.natm-video-dialog__header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 16px;color:#fff}
.natm-video-dialog__header h3{margin:0;color:#fff;font-size:1rem}
.natm-video-close{display:grid;place-items:center;flex:0 0 auto;width:38px;height:38px;padding:0;border:1px solid rgba(255,255,255,.32);border-radius:50%;background:rgba(255,255,255,.08);color:#fff;font:400 28px/1 sans-serif;cursor:pointer}
.natm-video-close:hover,.natm-video-close:focus{background:#fff;color:#07101e;outline:none}
.natm-video-player{display:block;width:100%;max-height:calc(92vh - 64px);background:#000}
@media(max-width:600px){.natm-video-overlay{padding:10px}.natm-video-dialog{width:100%;border-radius:12px}.natm-video-dialog__header{padding:9px 12px}.natm-video-dialog__header h3{font-size:.86rem}}