:root{color-scheme:light;--gold-50: #fcefd8;--gold-300: #c9a84c;--gold-600: #7f692d;--gold-700: #615020;--indigo: #4f3db0;--page: #f0edf8;--surface: #faf8ff;--well: #ddd8ea;--ink: #1a1740;--muted: #57527a;--gold: var(--gold-600);--link-hover: var(--gold-700);--line: #ccc6dd;--control-border: #78708f;--button: #4f3db0;--button-ink: #f5f3ff;--note: #e9e4f5;--focus: #4f3db0;--disabled-ink: #57527a;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none}@media(prefers-color-scheme:dark){:root{color-scheme:dark;--indigo: #46468a;--page: #181928;--surface: #232335;--well: #121220;--ink: #dfdee8;--muted: #b5b1c9;--gold: var(--gold-300);--link-hover: var(--gold-300);--line: #45435c;--control-border: #8c87a2;--button: #c9a84c;--button-ink: #1a1400;--note: #28283f;--focus: #e5bf58;--disabled-ink: #b5b1c9}}*{box-sizing:border-box}html{scroll-padding-top:1.5rem}body{margin:0;background:var(--page);color:var(--ink);font-size:1rem;line-height:1.65}body,input,select,button{font-family:inherit}main{min-height:60vh}main:focus{outline:none}img{max-width:100%;height:auto}picture{display:block}a{color:inherit;text-decoration-color:var(--gold);text-underline-offset:.22em;text-decoration-thickness:.08em}a:hover{color:var(--link-hover)}button,input,select{font:inherit}button,select{cursor:pointer}button:disabled,input:disabled{cursor:not-allowed;opacity:1}:focus-visible{outline:3px solid var(--focus);outline-offset:4px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.16;text-wrap:balance}h1{font-size:clamp(2.6rem,6.2vw,4.9rem);font-weight:750;letter-spacing:-.05em}h2{font-size:clamp(1.65rem,3vw,2.3rem);font-weight:700;letter-spacing:-.035em}h3{font-size:1.3rem;font-weight:650;letter-spacing:-.02em}p{text-wrap:pretty}ul,ol{margin:0}::selection{background:var(--gold);color:var(--page)}.shell{width:min(100% - 2.5rem,72rem);margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:10;top:.75rem;left:1rem;transform:translateY(-180%);padding:.65rem 1rem;background:var(--button);color:var(--button-ink);border-radius:.3rem}.skip-link:focus{transform:translateY(0);color:var(--button-ink)}.eyebrow{color:var(--muted);font-size:.74rem;font-weight:700;letter-spacing:.11em;line-height:1.5;text-transform:uppercase}.small-text{font-size:.85rem;line-height:1.6;color:var(--muted)}.gold-text{color:var(--gold)}.button{display:inline-flex;align-items:center;justify-content:center;gap:.8rem;min-height:48px;padding:.8rem 1.25rem;border:1px solid transparent;border-radius:.3rem;background:var(--button);color:var(--button-ink);text-decoration:none;font-weight:650;line-height:1.45}.button:hover{color:var(--button-ink);text-decoration:underline}.button-secondary{border-color:var(--control-border);background:transparent;color:var(--ink)}.button-secondary:hover{color:var(--ink);background:var(--surface)}.button:disabled{background:var(--well);border-color:var(--control-border);color:var(--disabled-ink)}.button:disabled:hover{text-decoration:none}.text-link{display:inline-flex;align-items:center;gap:.6rem;min-height:44px;font-size:.94rem;font-weight:650}.site-header{border-bottom:1px solid var(--line)}.header-inner{display:flex;flex-direction:column;gap:.65rem;padding-block:1.1rem .65rem}.brand{display:inline-flex;align-items:center;align-self:flex-start;gap:.55rem;min-height:44px;text-decoration:none}.brand>img{width:44px;flex-shrink:0}.brand-name{display:flex;align-items:baseline;gap:.6rem;font-size:1.55rem;font-weight:750;letter-spacing:-.05em}.brand-japanese{color:var(--muted);font-size:.75rem;font-weight:500;letter-spacing:.07em}.nav-list{display:flex;flex-wrap:wrap;gap:.2rem 1.15rem;padding:0;list-style:none}.nav-list a{display:flex;align-items:center;min-height:44px;font-size:.88rem;font-weight:550;text-decoration:none}.nav-list a:hover,.nav-list a[aria-current=page]{color:var(--gold);text-decoration:underline}.hero{display:grid;gap:2.5rem;padding-block:3.75rem 3.25rem}.hero h1{margin-top:1.2rem}.hero-description{max-width:34rem;margin-top:1.5rem;color:var(--muted);font-size:1.08rem;line-height:1.7}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem 1.5rem;margin-top:1.75rem}.hero-footnote{margin-top:1.3rem;color:var(--muted);font-size:.77rem}.study-note{align-self:center;padding:1.65rem;border:1px solid var(--line);border-radius:.3rem;background:var(--note)}.note-topline{display:flex;align-items:center;justify-content:space-between;gap:1rem;color:var(--muted);font-size:.65rem;font-weight:650;letter-spacing:.1em}.note-topline [lang=ja]{font-size:.82rem}.kana-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));margin-block:1.6rem;border-top:1px solid var(--line);border-left:1px solid var(--line);font-family:Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif}.kana-grid span{display:flex;justify-content:center;align-items:center;aspect-ratio:1;border-right:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:clamp(1.2rem,4vw,1.65rem)}.kana-grid span:nth-child(-n+5){background:var(--surface);color:var(--gold)}.study-note h2{font-size:1.85rem}.study-note p{margin-top:.9rem;color:var(--muted);font-size:.94rem}.study-note .text-link{margin-top:.8rem}.section-block{padding-block:2.8rem;border-top:1px solid var(--line)}.section-heading{display:flex;flex-direction:column;gap:1rem;margin-bottom:2rem}.section-heading h2{margin-top:.5rem}.section-heading>p{color:var(--muted);font-size:.9rem}.guide-list{display:grid;gap:1.6rem;padding:0;list-style:none}.guide-list li{position:relative;padding:1.5rem 0 0;border-top:1px solid var(--line)}.guide-list h3{max-width:18rem;margin-block:.7rem .9rem;font-size:1.6rem}.guide-list h3 a{text-decoration:none}.guide-list h3 a:hover{text-decoration:underline}.guide-list p{max-width:22rem;margin-bottom:1rem;color:var(--muted);font-size:.93rem}.guide-list .eyebrow{display:block;padding-right:3rem}.guide-number{position:absolute;right:0;top:1.15rem;color:var(--gold);font-size:1.5rem;font-variant-numeric:tabular-nums;line-height:1.2}.featured-resources{padding:0;list-style:none}.featured-resources li{display:grid;grid-template-columns:4.5rem 1fr;gap:.8rem;padding-block:1.5rem;border-top:1px solid var(--line)}.featured-level{width:4.5rem;align-self:start;padding-block:.6rem;border:1px solid var(--line);border-radius:.25rem;color:var(--gold);text-align:center;font-size:.8rem;font-weight:700}.featured-resources h3{margin-block:.35rem .65rem}.featured-resources p:not(.eyebrow){max-width:45rem;color:var(--muted);font-size:.93rem}.featured-resources .small-text{margin-top:.7rem;font-size:.8rem!important}.editorial-note{margin-top:1.25rem;color:var(--muted);font-size:.83rem}.newsletter{display:grid;gap:1.75rem;margin-block:1.5rem 2rem;padding:1.75rem;border:1px solid var(--line);border-radius:.3rem;background:var(--surface)}.newsletter h2{margin-block:.65rem 1rem}.newsletter>div>p:not(.eyebrow){max-width:33rem;color:var(--muted);font-size:.95rem}.newsletter-signup{align-self:center}label{display:block;margin-bottom:.45rem;font-size:.85rem;font-weight:650}input,select{width:100%;min-height:48px;padding:.65rem .8rem;border:1px solid var(--control-border);border-radius:.3rem;background:var(--surface);color:var(--ink)}input:disabled{color:var(--disabled-ink);background:var(--page)}input::placeholder{color:var(--disabled-ink);opacity:1}.signup-controls{display:grid;gap:.6rem}.newsletter-signup .small-text{margin-top:.85rem}.support-note{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem 2rem;padding-block:.5rem 3rem;color:var(--muted);font-size:.9rem}.site-footer{margin-top:1rem;padding-block:2.5rem 1.25rem;border-top:1px solid var(--line);background:var(--surface)}.footer-top{display:flex;flex-direction:column;gap:1.5rem}.footer-brand{font-size:1.3rem;font-weight:750;text-decoration:none}.footer-brand span{margin-left:.5rem;font-size:.8rem;font-weight:500}.footer-top p{margin-top:.5rem;color:var(--muted);font-size:.87rem}.footer-top .small-text{max-width:26rem;font-size:.8rem}.footer-links{display:flex;flex-direction:column;padding:0;list-style:none}.footer-links a{display:flex;align-items:center;min-height:44px;width:fit-content;font-size:.85rem}.footer-bottom{display:flex;flex-direction:column;gap:.5rem;margin-top:1.75rem;padding-top:1rem;border-top:1px solid var(--line);color:var(--muted);font-size:.75rem}.feed-links{display:flex;flex-wrap:wrap;gap:.2rem 1rem;padding:0;list-style:none}.feed-links a{display:flex;align-items:center;min-height:44px}.page-content{padding-block:2.75rem 3.5rem}.page-heading{max-width:55rem;margin-bottom:2.75rem}.page-heading h1{margin-block:.8rem 1.25rem;font-size:clamp(2.45rem,5.5vw,4rem)}.page-heading>p:not(.eyebrow){max-width:43rem;color:var(--muted);font-size:1.05rem}.filter-panel{display:grid;gap:1rem;padding:1.25rem;border:1px solid var(--line);border-radius:.3rem;background:var(--surface)}.filter-panel .button{align-self:end}.resource-list-heading{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.6rem 1.5rem;padding-block:1.5rem;font-size:.85rem}.resource-list-heading>p{color:var(--muted)}.resource-list-heading a{display:inline-flex;align-items:center;min-height:44px}.resource-grid{display:grid;gap:1.25rem;padding:0;list-style:none}.resource-item{min-width:0}.resource-card{display:flex;flex-direction:column;height:100%;padding:1.5rem;border:1px solid var(--line);border-radius:.3rem;background:var(--surface)}.resource-meta{display:flex;flex-wrap:wrap;gap:.35rem .65rem;margin-bottom:1.1rem;color:var(--muted);font-size:.7rem}.level-label{color:var(--gold);font-weight:700}.pick-label{margin-left:auto;color:var(--gold)}.resource-card h2{margin-bottom:.9rem;font-size:1.38rem;letter-spacing:-.025em}.resource-card h2 a{text-decoration:none}.resource-card h2 a:hover{text-decoration:underline}.resource-card>p{margin-bottom:1.35rem;color:var(--muted);font-size:.94rem}.resource-cost{margin-top:auto;padding-top:1rem;border-top:1px solid var(--line)}.cost-label{font-size:.8rem;font-weight:650}.resource-cost p{margin-top:.4rem;font-size:.79rem}.resource-card .review-note{margin-block:1rem 0;padding-top:.75rem;border-top:1px solid var(--line);font-size:.78rem}.notice,.empty-state{padding:1.25rem;border:1px solid var(--line);border-radius:.2rem;background:var(--surface);font-size:.92rem}.notice h2{margin-bottom:.75rem;font-size:1.25rem}.notice p+p{margin-top:.75rem}.empty-state{margin-bottom:1.5rem}.resource-disclosure{margin-top:2rem;color:var(--muted)}.resource-disclosure h2{color:var(--ink)}.sponsored-label{display:inline-block;color:var(--gold);font-size:.77rem;font-weight:700}.affiliate-note{color:var(--muted);font-size:.8rem;font-weight:400}.breadcrumb{display:flex;align-items:center;gap:.6rem;margin-bottom:1.5rem;font-size:.8rem;color:var(--muted)}.breadcrumb a{display:inline-flex;align-items:center;min-height:44px}.guide-heading h1{max-width:51rem}.article-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;margin-top:1.25rem;color:var(--muted);font-size:.8rem}.article-layout{display:grid;gap:2rem;padding-top:2rem;border-top:1px solid var(--line)}.article-sidebar nav{padding-bottom:1.5rem;border-bottom:1px solid var(--line)}.article-sidebar ul{display:grid;gap:.45rem;margin-top:.7rem;padding:0;list-style:none}.article-sidebar a{display:inline-flex;align-items:center;min-height:44px;font-size:.86rem;line-height:1.55}.prose{font-size:1rem;line-height:1.85;overflow-wrap:break-word}.prose-narrow{max-width:45rem}.prose>p+p,.prose li+li{margin-top:.85rem}.prose h2{margin-block:2.3rem 1rem;font-size:1.65rem}.prose>h2:first-child{margin-top:0}.prose h3{margin-block:1.5rem .85rem;font-size:1.2rem}.prose ul,.prose ol{margin-block:1.1rem;padding-left:1.4rem}.prose ul+p,.prose ol+p{margin-top:1.1rem}.guide-article{min-width:0;max-width:48rem}.prose table{display:block;width:100%;max-width:100%;overflow-x:auto;margin-block:1.25rem;border-collapse:collapse;font-size:.84rem}.prose table th,.prose table td{min-width:8rem;padding:.85rem .7rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.prose table th{font-weight:650}.prose table thead{background:var(--surface)}.table-scroll{position:relative;overflow-x:auto;margin-block:1.25rem}.table-scroll table{display:table;min-width:34rem;margin:0}.free-resources{margin-top:2rem}.article-accountability{margin-top:2rem;padding-top:1.25rem;border-top:1px solid var(--line);color:var(--muted);font-size:.8rem}.related-guides{margin-top:3rem;padding-block:2rem;border-top:1px solid var(--line)}.related-guides h2{margin-block:.5rem 1rem;font-size:1.65rem}.related-guides ul{display:flex;flex-direction:column;gap:.5rem;padding:0;list-style:none}.sponsor-layout{display:grid;gap:2.5rem}.sponsor-package{align-self:start;padding:1.75rem;border:1px solid var(--line);border-radius:.3rem;background:var(--surface)}.sponsor-package h2{margin-top:1rem;font-size:1.7rem}.sponsor-price{margin-top:1rem;color:var(--gold);font-size:clamp(2.75rem,6vw,4rem);font-weight:750;letter-spacing:-.045em;line-height:1.3}.rate-note{margin-top:.6rem;font-size:.88rem}.package-inclusions{display:grid;gap:.85rem;margin-block:1.6rem;padding-left:1.1rem;font-size:.9rem}.sponsor-cta{width:100%}.sponsor-package .small-text{margin-top:1rem}.sponsor-explanation h2:first-child{margin-top:0}.sponsor-slot{margin-top:3rem;padding:1.75rem;border:1px dashed var(--control-border);border-radius:.3rem}.sponsor-slot h2{margin-block:.7rem;font-size:1.4rem}.sponsor-slot p{color:var(--muted);font-size:.9rem}html[lang=ja]{font-family:Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,ui-sans-serif,system-ui,sans-serif}.legal-title{letter-spacing:-.015em!important}.draft-notice{margin-bottom:2rem}.legal-details{margin:0;border-top:1px solid var(--line);font-size:.95rem}.legal-details>div{display:grid;gap:.5rem;padding-block:1.2rem;border-bottom:1px solid var(--line)}.legal-details dt{font-weight:700}.legal-details dd{margin:0;overflow-wrap:anywhere}.legal-followup{margin-top:2.5rem}@media(min-width:600px){.shell{width:min(100% - 4rem,72rem)}.signup-controls{grid-template-columns:minmax(0,1fr) auto}.filter-panel{grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section-heading{flex-direction:row;align-items:end;justify-content:space-between}.section-heading>p{text-align:right}.featured-resources li{grid-template-columns:6rem 1fr;gap:1.5rem}.featured-level{width:6rem;padding-block:.8rem}.newsletter{padding:2.25rem}.footer-top,.footer-bottom{flex-direction:row;justify-content:space-between;gap:2rem}.footer-links{align-items:end}.legal-details>div{grid-template-columns:minmax(10rem,1fr) 3fr;gap:2rem}}@media(min-width:850px){.header-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:2rem;padding-block:1.1rem}.nav-list{gap:1.8rem}.hero{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:3.5rem;padding-block:4.75rem}.hero h1{font-size:clamp(3.5rem,5.6vw,4.7rem)}.study-note{padding:1.9rem}.kana-grid span{font-size:1.65rem}.guide-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:2.5rem}.section-block{padding-block:3rem}.newsletter{grid-template-columns:1.1fr 1fr;gap:3rem;padding:2.5rem}.page-content{padding-block:3.5rem 4.5rem}.article-layout{grid-template-columns:13.5rem minmax(0,1fr);gap:3.5rem}.article-sidebar nav{position:sticky;top:2rem;border-bottom:none}.related-guides ul{flex-direction:row;gap:2rem}.sponsor-layout{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:3.5rem}}@media(prefers-reduced-motion:no-preference){.skip-link{transition:transform .15s ease}}