/* ============================================================
   Nirai Design System v1.0 — nirai.css
   ニライカナイ（海の彼方の理想郷）× モダンSaaS
   フォント: Shippori Mincho（感情/見出し）+ Noto Sans JP（本文）
   ============================================================ */
:root{
  --ink:#0B2239;         /* 深海の紺 — 本文見出し */
  --deep:#06283D;        /* 夜の海 — フッター/ヒーロー */
  --sea:#0E5E8A;         /* 海 — リンク/強調 */
  --sea-2:#1180B8;       /* 浅瀬 */
  --foam:#EAF4F8;        /* 波の泡 — 淡背景 */
  --sand:#F7F3EC;        /* 砂浜 — 交互背景 */
  --coral:#E8604C;       /* 珊瑚 — 行動CTA */
  --coral-d:#D14E3B;
  --line:#06C755;        /* LINEブランド */
  --line-d:#05A648;
  --gold:#C9A86A;        /* 資格/実績の金 */
  --text:#33475B;
  --mut:#5E7387;
  --bd:#D8E4EC;
  --serif:"Shippori Mincho","Hiragino Mincho ProN",serif;
  --sans:"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;
  --maxw:1080px;
  --rad:14px;
  --sh:0 6px 24px rgba(11,34,57,.08);
  --sh-lg:0 14px 44px rgba(11,34,57,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--text);line-height:1.9;font-size:16px;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--sea);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--sea-2);outline-offset:2px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:8px 16px;z-index:200}
.skip:focus{left:8px}

/* ---- layout ---- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:72px 0}
.sec-foam{background:var(--foam)}
.sec-sand{background:var(--sand)}
.sec-deep{background:linear-gradient(160deg,var(--deep),#0A3A57);color:#EAF4F8}
.sec-deep h2,.sec-deep h3{color:#fff}
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.g2,.g3,.g4{grid-template-columns:1fr}section{padding:52px 0}}
@media(min-width:861px) and (max-width:1024px){.g4{grid-template-columns:repeat(2,1fr)}}

/* ---- typography ---- */
h1,h2,h3,.serif{font-family:var(--serif);color:var(--ink);line-height:1.5;font-weight:700}
h1{font-size:clamp(30px,5vw,48px);letter-spacing:.02em}
h2{font-size:clamp(24px,3.6vw,34px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:10px}
.kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--sea);text-transform:uppercase;margin-bottom:12px}
.sec-deep .kicker{color:#9FD4EE}
.lead{font-size:17.5px;max-width:760px}
.lead strong{color:var(--ink)}
.center{text-align:center}
.center .lead{margin:0 auto}
.answer{max-width:760px;font-size:17px;color:var(--ink);border-left:4px solid var(--sea-2);padding:6px 0 6px 16px;margin:0 0 20px;background:transparent}
.sec-deep .answer{color:#EAF4F8;border-color:#9FD4EE}
.note{font-size:13px;color:var(--mut)}
.sec-deep .note{color:#B9D4E4}

/* ---- header ---- */
.hd{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--bd)}
.hd-in{max-width:var(--maxw);margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-family:var(--serif);font-weight:800;font-size:21px;color:var(--ink);letter-spacing:.04em}
.logo span{color:var(--sea-2)}
.nav{display:flex;gap:22px;align-items:center;font-size:14.5px}
.nav a{color:var(--ink);font-weight:500}
.nav-toggle{display:none;background:none;border:0;font-size:26px;color:var(--ink);cursor:pointer}
@media(max-width:900px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 20px 22px;border-bottom:1px solid var(--bd);gap:16px;box-shadow:var(--sh)}
  .nav.open{display:flex}
}

/* ---- buttons ---- */
.btn{display:inline-block;padding:14px 30px;border-radius:999px;font-weight:700;font-size:16px;text-align:center;transition:transform .15s,box-shadow .15s;cursor:pointer;border:0;text-decoration:none!important}
.btn:hover{transform:translateY(-2px);box-shadow:var(--sh-lg)}
.btn-line{background:var(--line);color:#fff!important}
.btn-line:hover{background:var(--line-d)}
.btn-line::before{content:"💬 "}
.btn-coral{background:var(--coral);color:#fff!important}
.btn-coral:hover{background:var(--coral-d)}
.btn-ghost{background:transparent;color:var(--ink)!important;border:2px solid var(--ink)}
.sec-deep .btn-ghost{color:#fff!important;border-color:#fff}
.btn-sm{padding:10px 20px;font-size:14px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.center .cta-row{justify-content:center}

/* ---- hero ---- */
.hero{position:relative;background:linear-gradient(165deg,#06283D 0%,#0A4A6E 55%,#1180B8 100%);color:#fff;padding:46px 0 60px;overflow:hidden}
.hero .kicker{color:#9FD4EE}
.hero h1{color:#fff;line-height:1.3;font-size:clamp(28px,4.3vw,42px)}
.hero .lead{color:#DCEDF6;margin-top:14px;line-height:1.7;font-size:16.5px}
.hero .btn{padding:12px 22px;font-size:15px}
.hero .bc{padding:0 0 10px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);gap:34px;align-items:center}
.hero-visual{margin:0;position:relative}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--rad);box-shadow:0 22px 70px rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.24)}
.hero-visual figcaption{margin-top:12px;color:#C8E4F1;font-size:13px;line-height:1.7}
.hero-visual::after{content:"";position:absolute;inset:auto 22px 52px 22px;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.58),transparent)}
@media(max-width:900px){
  .hero{padding:12px 0 12px}
  .hero h1{font-size:clamp(27px,8vw,34px)}
  .hero .lead{font-size:15.5px;line-height:1.65}
  .hero .lead br,.hero .bc,.hero .note{display:none}
  .hero .btn{width:100%;padding:11px 14px}
  .hero-grid{grid-template-columns:1fr;gap:20px}
  .hero-visual{order:-1}
  .hero-visual img{aspect-ratio:7/2}
  .hero-visual figcaption,.hero-visual::after{display:none}
  .hero-badges{display:none}
}
.hero-wave{position:absolute;bottom:-1px;left:0;width:100%;line-height:0}
.hero-wave svg{width:100%;height:70px;display:block}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.badge{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);border-radius:999px;padding:6px 16px;font-size:13px;color:#EAF4F8}
.badge-gold{background:rgba(201,168,106,.2);border-color:var(--gold);color:#F0E3C8}
.hero-home{background:linear-gradient(90deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.86) 42%,rgba(255,255,255,.36) 70%,rgba(255,255,255,.08) 100%),linear-gradient(180deg,rgba(218,247,255,.42),rgba(255,255,255,.18)),url('/img/nirai-series-ocean-relief-hero.png') center right/cover no-repeat;color:var(--ink);padding:58px 0 76px}
.hero-home .hero-grid{grid-template-columns:minmax(0,760px)}
.hero-home h1{color:var(--ink);font-size:clamp(32px,4.4vw,48px);line-height:1.25}
.hero-home .lead{color:#264457;font-size:18px;max-width:650px}
.hero-home .kicker{color:#0E6FA0}
.hero-home .hero-badges .badge{background:rgba(255,255,255,.72);border-color:rgba(14,94,138,.22);color:#24536B;box-shadow:0 6px 18px rgba(14,94,138,.1)}
.hero-home .hero-badges .badge-gold{border-color:#D7B778;color:#806020}
.hero-home .btn-ghost{background:rgba(255,255,255,.65);border-color:var(--sea);color:var(--sea)!important}
.hero-home .hero-visual{display:none}
@media(max-width:900px){
  .hero-home{background:linear-gradient(180deg,rgba(255,255,255,.82) 0%,rgba(255,255,255,.95) 42%,rgba(255,255,255,.98) 100%),url('/img/nirai-series-ocean-relief-hero.png') center top/cover no-repeat;padding:150px 0 18px}
  .hero-home .hero-grid{display:block}
  .hero-home h1{font-size:clamp(29px,8vw,37px)}
  .hero-home .lead{color:#29495B;font-size:15px;line-height:1.58}
}

/* ---- cards ---- */
.card{background:#fff;border:1px solid var(--bd);border-radius:var(--rad);padding:28px;box-shadow:var(--sh)}
.card h3{display:flex;align-items:center;gap:8px}
.card .ico{font-size:26px;line-height:1}
.sec-deep .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.18);color:#DCEDF6}
.sec-deep .card h3{color:#fff}

/* ---- stats band ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
@media(max-width:860px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat b{display:block;font-family:var(--serif);font-size:clamp(30px,4vw,44px);color:var(--ink);line-height:1.2}
.sec-deep .stat b{color:#fff}
.stat b small{font-size:.5em}
.stat span{font-size:13.5px;color:var(--mut)}
.sec-deep .stat span{color:#B9D4E4}

/* ---- pricing ---- */
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;align-items:stretch}
.price{background:#fff;border:1px solid var(--bd);border-radius:var(--rad);padding:30px 24px;text-align:center;position:relative;display:flex;flex-direction:column}
.price.reco{border:2px solid var(--sea-2);box-shadow:var(--sh-lg)}
.price .flag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--sea-2);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:3px 16px;white-space:nowrap}
.price h3{font-size:18px}
.price .tag{font-family:var(--serif);color:var(--sea);font-size:14px;margin-bottom:8px}
.price .amount{font-family:var(--serif);font-size:38px;color:var(--ink);font-weight:800;margin:8px 0 2px}
.price .amount small{font-size:14px;font-weight:500;color:var(--mut)}
.price ul{list-style:none;text-align:left;font-size:14px;margin:16px 0 20px;flex:1}
.price ul li{padding:7px 0 7px 26px;position:relative;border-bottom:1px dashed var(--bd)}
.price ul li::before{content:"✓";position:absolute;left:2px;color:var(--sea-2);font-weight:700}

/* ---- FAQ ---- */
.faq{max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--bd);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 48px 18px 22px;font-weight:700;color:var(--ink);position:relative;list-style:none;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"＋";position:absolute;right:20px;top:50%;transform:translateY(-50%);color:var(--sea-2);font-size:20px}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 22px 20px;font-size:15.5px}
.faq .a p:first-child{color:var(--ink);font-weight:500}

/* ---- story / letter ---- */
.scene{font-family:var(--serif);font-size:clamp(18px,2.6vw,23px);line-height:2.2;color:var(--ink);max-width:680px;margin:0 auto}
.sec-deep .scene{color:#EAF4F8}
.letter{background:var(--sand);border:1px solid #E7DCC8;border-radius:var(--rad);padding:44px 36px;max-width:760px;margin:0 auto;box-shadow:var(--sh)}
.letter p{font-family:var(--serif);font-size:16.5px;line-height:2.3;color:var(--ink);margin-bottom:1.2em}
.letter .sign{text-align:right;font-family:var(--serif);color:var(--ink);margin-top:28px}
blockquote.pull{font-family:var(--serif);font-size:clamp(19px,3vw,26px);color:var(--ink);line-height:2;border:0;text-align:center;max-width:720px;margin:0 auto;padding:8px 20px}
blockquote.pull cite{display:block;font-size:14px;color:var(--mut);margin-top:14px;font-style:normal}

/* ---- timeline / steps ---- */
.steps{counter-reset:st;max-width:760px;margin:0 auto}
.step{position:relative;padding:0 0 34px 66px;counter-increment:st}
.step::before{content:counter(st);position:absolute;left:0;top:0;width:44px;height:44px;border-radius:50%;background:var(--sea-2);color:#fff;font-family:var(--serif);font-weight:800;font-size:20px;display:flex;align-items:center;justify-content:center}
.step::after{content:"";position:absolute;left:21px;top:48px;bottom:6px;width:2px;background:var(--bd)}
.step:last-child::after{display:none}
.step h3{margin-bottom:4px}

/* ---- comparison table ---- */
.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--rad);overflow:hidden;box-shadow:var(--sh);font-size:14.5px}
.tbl th,.tbl td{padding:14px 16px;border-bottom:1px solid var(--bd);text-align:left;vertical-align:top}
.tbl thead th{background:var(--ink);color:#fff;font-weight:700}
.tbl tbody tr:nth-child(even){background:var(--foam)}
.tbl .ok{color:var(--sea);font-weight:700}
.tbl .ng{color:var(--mut)}
.tbl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---- breadcrumbs ---- */
.bc{font-size:13px;color:var(--mut);padding:14px 0}
.bc ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.bc li+li::before{content:"›";margin-right:6px;color:var(--bd)}

/* ---- blog ---- */
.post{max-width:720px;margin:0 auto}
.post-meta{font-size:13.5px;color:var(--mut);display:flex;gap:14px;flex-wrap:wrap;margin:10px 0 30px}
.post h2{margin-top:56px}
.post h3{margin-top:36px}
.post p{margin-bottom:1.5em}
.post .scene{margin:36px auto}
.post img{border-radius:var(--rad);margin:24px 0}
.post-cta{background:var(--foam);border-radius:var(--rad);padding:30px;margin-top:56px;text-align:center}
.post-card{background:#fff;border:1px solid var(--bd);border-radius:var(--rad);padding:26px;box-shadow:var(--sh);display:flex;flex-direction:column;gap:8px}
.post-card .cat{font-size:12px;font-weight:700;color:var(--sea);letter-spacing:.1em}
.post-card h3 a{color:var(--ink)}
.post-card time{font-size:13px;color:var(--mut)}
.toc{background:var(--foam);border-radius:12px;padding:20px 24px;font-size:14.5px;margin:26px 0}
.toc b{color:var(--ink)}
.toc ol{margin:8px 0 0 20px}

/* ---- sticky mobile CTA bar ---- */
.ctabar{position:fixed;left:0;right:0;bottom:0;z-index:120;display:none;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-top:1px solid var(--bd)}
.ctabar .btn{flex:1;padding:12px 8px;font-size:14px}
.ctabar.show{display:flex}
@media(min-width:901px){.ctabar.show{display:none}}
body.has-ctabar{padding-bottom:76px}

/* ---- footer ---- */
.ft{background:var(--deep);color:#B9D4E4;padding:64px 0 96px;font-size:14px}
.ft a{color:#DCEDF6}
.ft h4{color:#fff;font-size:14px;margin-bottom:12px;letter-spacing:.08em}
.ft ul{list-style:none}
.ft li{margin-bottom:8px}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
@media(max-width:860px){.ft-grid{grid-template-columns:1fr 1fr}}
.ft .logo{color:#fff;margin-bottom:10px;display:inline-block}
.ft-btm{border-top:1px solid rgba(255,255,255,.15);margin-top:40px;padding-top:22px;font-size:12.5px;color:#8FB0C4;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---- diagnostic (shindan) ---- */
.quiz{max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--bd);border-radius:var(--rad);padding:34px;box-shadow:var(--sh-lg)}
.quiz .qnum{font-size:13px;color:var(--sea);font-weight:700;letter-spacing:.12em}
.quiz h3{font-size:21px;margin:8px 0 20px}
.quiz .opts{display:grid;gap:12px}
.quiz .opts button{background:var(--foam);border:2px solid transparent;border-radius:12px;padding:16px 18px;font-size:15.5px;text-align:left;cursor:pointer;font-family:var(--sans);color:var(--ink);transition:border-color .15s}
.quiz .opts button:hover{border-color:var(--sea-2)}
.quiz .bar{height:8px;background:var(--foam);border-radius:99px;margin-bottom:24px;overflow:hidden}
.quiz .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--sea-2),var(--sea));border-radius:99px;transition:width .3s}
.quiz .result-num{font-family:var(--serif);font-size:52px;color:var(--coral);font-weight:800;line-height:1.2}
.calc label{display:block;font-weight:700;color:var(--ink);margin:18px 0 6px;font-size:15px}
.calc input[type=range]{width:100%}
.calc output{font-family:var(--serif);font-weight:800;color:var(--ink)}
.calc .big{font-size:44px;color:var(--coral)}

/* ---- misc ---- */
.hr-wave{border:0;height:2px;background:linear-gradient(90deg,transparent,var(--sea-2),transparent);margin:0}
.tagline-jp{font-family:var(--serif);letter-spacing:.06em}
.avatar{width:120px;height:120px;border-radius:50%;object-fit:cover;border:3px solid var(--gold)}
.updated{font-size:12.5px;color:var(--mut)}
@media print{.hd,.ctabar,.ft{display:none}}

/* ---- photos & story (v1.1) ---- */
.photo-band{margin:0;position:relative}
.photo-band img{width:100%;height:clamp(260px,44vw,460px);object-fit:cover;display:block}
.photo-band figcaption{position:absolute;left:0;right:0;bottom:0;padding:60px 20px 22px;text-align:center;color:#fff;font-family:var(--serif);font-size:clamp(15px,2.4vw,20px);letter-spacing:.06em;background:linear-gradient(transparent,rgba(6,40,61,.72));text-shadow:0 1px 8px rgba(6,40,61,.6)}
.figure{margin:34px 0 0}
.figure img{width:100%;border-radius:var(--rad);box-shadow:var(--sh-lg)}
.figure figcaption{font-size:13px;color:var(--mut);margin-top:10px;text-align:center}
.story-photo{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,44%);gap:34px;align-items:center}
.story-photo img{width:100%;border-radius:var(--rad);box-shadow:var(--sh-lg)}
.story-photo figcaption{font-size:13px;color:var(--mut);margin-top:10px;text-align:center;line-height:1.7}
.visual-note{background:rgba(255,255,255,.72);border:1px solid var(--bd);border-radius:var(--rad);padding:18px 20px;margin-top:18px;font-size:14.5px}
@media(max-width:860px){.story-photo{grid-template-columns:1fr}.story-photo figure{order:-1}}
.nirai-avatar{width:72px;height:72px;flex:none}
.chat-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.chat-head b{font-family:var(--serif);color:var(--ink);font-size:17px}
.chat-head span{display:block;font-size:12.5px;color:var(--mut)}
.story-photo{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
@media(max-width:860px){.story-photo{grid-template-columns:1fr}}
.story-photo img{width:100%;border-radius:var(--rad);box-shadow:var(--sh-lg)}