/* TANKA landing pages — soft, Apple-like treatment aligned to jp.tanka.ai tokens */
:root{
  --bg:#FBFBFD; --surface:#FFFFFF;
  --ink:#1D1D1F; --body:#2B2B30; --muted:#6E6E73; --soft:#A1A1A6;
  --hair:rgba(0,0,0,.06); --hair-2:rgba(0,0,0,.10);
  --blue:#3C90F0; --blue-deep:#2F7BE0; --blue-ink:#1D5FC4; --tint:#F0F5FF; --tint-2:#E6EEFB;
  --err:#B42318; --err-soft:#FEF0EF;
  --r-xl:28px; --r-lg:22px; --r-md:16px; --r-sm:12px; --r-pill:999px;
  --shadow-1:0 1px 2px rgba(0,0,0,.03),0 6px 24px rgba(20,30,50,.05);
  --shadow-2:0 2px 6px rgba(0,0,0,.04),0 18px 50px rgba(20,30,50,.08);
  --sans:"Inter","Noto Sans JP","Hiragino Sans","Yu Gothic UI",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--body);font:15px/1.9 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-feature-settings:"palt" 1}
a{color:var(--blue-ink);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
b,strong{font-weight:600;color:var(--ink)}
.hd{position:sticky;top:0;z-index:10;backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);background:rgba(251,251,253,.78);border-bottom:1px solid var(--hair)}
.hd-in{max-width:1080px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 22px}
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand img{width:24px;height:23px;display:block}
.brand .word{font-weight:700;font-size:19px;letter-spacing:-.01em;line-height:1}
.hd-links{display:flex;gap:28px;align-items:center;font-size:13.5px}
.hd-links a{color:var(--body);opacity:.85}
.hd-links a:hover{opacity:1;text-decoration:none}
.hd-cta{display:inline-flex;align-items:center;gap:6px;background:var(--ink);color:#fff;border-radius:10px;padding:9px 16px;font-weight:600;font-size:13px}
.hd-cta:hover{background:#000;text-decoration:none}
@media (max-width:640px){.hd-links{display:none}}
.wrap{max-width:720px;margin:0 auto;padding:64px 22px 96px}
.wrap.wide{max-width:1080px}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:600;color:var(--blue-ink);background:var(--tint);border-radius:var(--r-pill);padding:5px 14px;letter-spacing:.01em}
.title{font-size:38px;line-height:1.2;margin:0 0 14px;font-weight:700;color:var(--ink);letter-spacing:-.025em;text-wrap:balance}
.lead{color:var(--muted);margin:0 0 30px;font-size:16px}
.is-hero{text-align:center;position:relative}
.is-hero::before{content:"";position:absolute;left:50%;top:-40px;width:min(900px,100vw);height:520px;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(60,144,240,.10),rgba(60,144,240,0));pointer-events:none;z-index:-1}
.is-hero .eyebrow{margin-bottom:26px}
.is-hero .title{font-size:52px;line-height:1.12;margin:0 auto 18px;max-width:880px}
.is-hero .content{text-align:left}
.is-hero .content .hero{text-align:center}
.content h2{font-size:20px;font-weight:600;color:var(--ink);margin:44px 0 10px;letter-spacing:-.01em}
.content h3{font-size:16px;font-weight:600;margin:22px 0 6px;color:var(--ink)}
.content p{margin:10px 0}
.content ul,.content ol{padding-left:1.4em;margin:8px 0}
.content li{margin:6px 0}
.content li::marker{color:var(--soft)}
.content table{border-collapse:collapse;width:100%;font-size:14px;margin:12px 0;display:block;overflow-x:auto}
.content th,.content td{padding:12px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--hair)}
.content th{color:var(--muted);font-size:12.5px;font-weight:600}
.content code{background:var(--tint);color:var(--blue-ink);padding:2px 7px;border-radius:6px;font-size:13px;font-family:"Inter",ui-monospace,monospace;word-break:break-all}
.content blockquote{margin:0 0 8px;padding:18px 22px;background:var(--tint);border-radius:var(--r-lg);color:var(--ink)}
.hero{padding:6px 0 0}
.hero .sub{font-size:19px;line-height:1.75;color:var(--muted);margin:0 auto 32px;max-width:680px;font-weight:400;text-align:center}
.hero .sub b{color:var(--ink);font-weight:600}
.cta-row{display:flex;gap:10px 22px;justify-content:center;align-items:center;flex-wrap:wrap;margin:0 0 6px}
.cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-pill);padding:14px 26px;font-weight:600;font-size:16px;min-width:220px;transition:transform .15s ease,background .15s ease,box-shadow .15s ease}
.cta:hover{text-decoration:none}
.cta.primary{background:linear-gradient(180deg,#4A9BF5,#2F7BE0);color:#fff;box-shadow:0 8px 24px rgba(47,123,224,.28)}
.cta.primary:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(47,123,224,.34)}
.cta.ghost{background:transparent;color:var(--blue-ink);min-width:0;padding:14px 6px;font-weight:500}
.cta.ghost::after{content:"›";font-size:20px;line-height:0;margin-left:2px}
.trust{display:flex;gap:8px 26px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-top:22px}
.trust span{display:inline-flex;align-items:center;gap:7px}
.trust span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue)}
.sec{margin-top:96px}
.sec-h{font-size:32px;font-weight:700;color:var(--ink);margin:0 0 10px;text-align:center;letter-spacing:-.02em;text-wrap:balance}
.sec-p{color:var(--muted);text-align:center;margin:0 auto 34px;font-size:16px;max-width:640px}
.fine{font-size:12.5px;color:var(--soft);text-align:center;margin:18px auto 0;max-width:760px;line-height:1.8}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-xl);padding:26px 24px 24px;position:relative;display:flex;flex-direction:column;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card.dark{background:linear-gradient(180deg,#F3F7FF 0%,#FFFFFF 62%);border-color:rgba(60,144,240,.22)}
.card .tag{display:inline-block;align-self:flex-start;background:var(--tint);color:var(--blue-ink);font-size:12px;font-weight:600;border-radius:var(--r-pill);padding:4px 12px;letter-spacing:.02em}
.card.dark .tag{background:var(--blue-deep);color:#fff}
.card .pimg{width:100%;max-width:240px;aspect-ratio:1/1;object-fit:contain;display:block;margin:14px auto 8px;border-radius:var(--r-lg);background:linear-gradient(180deg,#F7F8FA,#FFFFFF)}
.card .prize{font-size:24px;font-weight:700;color:var(--ink);line-height:1.25;letter-spacing:-.015em;margin-top:6px}
.card .qty{font-size:14px;color:var(--muted);margin-top:2px}
.card .spec{list-style:none;padding:0;margin:10px 0 0;font-size:13.5px;color:var(--muted);line-height:1.75}
.card .spec li::before{content:"";display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--soft);margin:0 9px 3px 0}
.card .when{margin-top:14px;font-size:14px;color:var(--body);line-height:1.7}
.card .when b{color:var(--ink);font-weight:600}
.card .do{margin-top:16px;background:var(--tint);border-radius:var(--r-md);padding:14px 16px 16px}
.card .do-h{font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--blue-ink);margin-bottom:6px}
.card .do ol{margin:0;padding-left:1.4em;font-size:14px;color:var(--body);line-height:1.75}
.card .do li{margin:2px 0}.card .do li::marker{font-weight:600;color:var(--blue-ink)}
.card .do b{font-weight:600}
.mini{display:inline-flex;align-items:center;gap:6px;margin-top:12px;background:var(--blue-deep);color:#fff;border-radius:var(--r-pill);padding:9px 16px;font-size:13.5px;font-weight:600}
.mini:hover{background:var(--blue-ink);text-decoration:none}
.mini.soon{background:transparent;color:var(--muted);border:1px solid var(--hair-2);font-weight:500}
.cmp{overflow-x:auto;border:1px solid var(--hair);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-1)}
.cmp table{border-collapse:collapse;width:100%;min-width:640px;font-size:14.5px}
.cmp th,.cmp td{padding:16px 18px;border-bottom:1px solid var(--hair);text-align:center;vertical-align:middle}
.cmp th{background:transparent;color:var(--ink);font-weight:600;font-size:15px;padding-top:22px}
.cmp th small,.cmp td small{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:3px}
.cmp td:first-child,.cmp th:first-child{text-align:left;font-weight:500;color:var(--ink);width:34%}
.cmp tr:last-child td{border-bottom:0}
.cmp td.y{color:var(--blue-ink);font-weight:600}
.cmp td.y::before{content:"";display:inline-block;width:18px;height:18px;border-radius:50%;background:var(--tint);margin-right:8px;vertical-align:-4px;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231D5FC4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><path d='M5 12l5 5L20 7'/></svg>");background-size:11px;background-repeat:no-repeat;background-position:center}
.cmp td.n{color:#D2D2D7}
.cmp td.opt{color:var(--muted);font-weight:500;font-size:13px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-xl);padding:26px 24px;box-shadow:var(--shadow-1)}
.step .n{width:34px;height:34px;border-radius:50%;background:var(--tint);color:var(--blue-ink);display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:14px}
.step h3{margin:0 0 6px;font-size:17px;color:var(--ink);font-weight:600}
.step p{margin:0;font-size:14.5px;color:var(--muted)}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:f}
.flow .f{position:relative;padding:26px 20px 20px;background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-lg);box-shadow:var(--shadow-1)}
.flow .f::before{counter-increment:f;content:counter(f);display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--tint);color:var(--blue-ink);font-weight:700;font-size:13px;margin-bottom:10px}
.flow h4{margin:0 0 6px;font-size:15.5px;color:var(--ink);font-weight:600}
.flow p{margin:0;font-size:13.5px;color:var(--muted)}
.chips{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 16px;margin:0;padding:0;list-style:none}
.chips li{background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-md);padding:13px 15px;font-size:14.5px;display:flex;gap:12px;align-items:flex-start;color:var(--body)}
.chips li::before{content:"";flex:none;width:20px;height:20px;border-radius:50%;background:var(--tint);margin-top:3px;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231D5FC4' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><path d='M5 12l5 5L20 7'/></svg>");background-size:11px;background-repeat:no-repeat;background-position:center}
.chips li.no{color:var(--muted)}
.chips li.no::before{background-color:#F4F4F6;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236E6E73' stroke-width='3' stroke-linecap='round'><path d='M6 6l12 12M18 6L6 18'/></svg>")}
.warn{margin-top:26px;display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-md);padding:16px 18px;font-size:14px;color:var(--body);box-shadow:var(--shadow-1)}
.warn::before{content:"i";flex:none;width:22px;height:22px;border-radius:50%;background:var(--tint);color:var(--blue-ink);font-weight:700;display:flex;align-items:center;justify-content:center;font-family:Georgia,serif;font-style:italic}
.faq details{background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-md);padding:0 20px;margin:10px 0}
.faq summary{cursor:pointer;padding:17px 0;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:15px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--soft);font-size:20px;font-weight:300;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 18px;color:var(--muted);font-size:14.5px}
.terms{margin-top:72px;background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-xl);padding:6px 26px}
.terms>summary{cursor:pointer;padding:20px 0;font-weight:600;font-size:17px;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center}
.terms>summary::-webkit-details-marker{display:none}
.terms>summary::after{content:"全文を表示 ›";font-size:13px;color:var(--blue-ink);font-weight:500}
.terms[open]>summary::after{content:"閉じる"}
.terms .content{padding-bottom:20px}
.terms .content h2{font-size:15.5px;margin:24px 0 6px}
.terms .content li,.terms .content p{font-size:14px;color:var(--body)}
.form-card{margin-top:40px;background:var(--surface);border:1px solid var(--hair);border-radius:var(--r-xl);padding:30px 28px;box-shadow:var(--shadow-1)}
.form-card h2{font-size:22px;margin:0 0 18px;color:var(--ink);font-weight:600;letter-spacing:-.01em}
.fld,.chk{display:block;margin:18px 0}
.lbl{display:block;font-weight:500;color:var(--ink);margin-bottom:8px;font-size:14.5px}
.req{display:inline-block;margin-left:8px;font-size:11px;font-weight:600;color:var(--blue-ink);background:var(--tint);padding:1px 8px;border-radius:var(--r-pill);vertical-align:middle}
input[type=text],input[type=email],textarea{width:100%;font:inherit;font-size:16px;padding:13px 14px;border:1px solid var(--hair-2);border-radius:var(--r-sm);background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
input:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(60,144,240,.18)}
.chk{display:flex;gap:12px;align-items:flex-start}
.chk input{margin-top:5px;width:18px;height:18px;flex:none;accent-color:var(--blue-deep)}
.chk span{display:block;color:var(--body)}
small{display:block;color:var(--muted);font-size:13px;margin-top:5px}
.btn{width:100%;margin-top:12px;padding:15px;border:0;border-radius:var(--r-pill);background:linear-gradient(180deg,#4A9BF5,#2F7BE0);color:#fff;font:inherit;font-weight:600;font-size:16px;cursor:pointer;box-shadow:0 8px 24px rgba(47,123,224,.25);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(47,123,224,.32)}
.note{font-size:13px;color:var(--muted);margin:14px 0 0}
.err{background:var(--err-soft);color:var(--err);padding:12px 14px;border-radius:var(--r-sm);margin-bottom:12px;font-size:14px}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.ft{max-width:1080px;margin:0 auto;padding:28px 22px 56px;display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;color:var(--soft);font-size:12.5px;border-top:1px solid var(--hair)}
.ft .brand .word{font-size:15px;color:var(--ink)}
.ft a{color:var(--muted)}
.ft .sp{flex:1}
@media (max-width:820px){.cards,.steps{grid-template-columns:1fr}.flow{grid-template-columns:1fr 1fr}.chips{grid-template-columns:1fr}.is-hero .title{font-size:34px}.hero .sub{font-size:16.5px}.sec{margin-top:64px}.sec-h{font-size:25px}.wrap{padding:40px 18px 64px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.flow-3{grid-template-columns:repeat(3,1fr)}
.card .do li small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.kit{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center;background:linear-gradient(135deg,#F3F7FF 0%,#FFFFFF 70%);border:1px solid rgba(60,144,240,.18);border-radius:var(--r-xl);padding:36px 38px;box-shadow:var(--shadow-1)}
.kit-t h2{font-size:24px;font-weight:700;color:var(--ink);margin:12px 0 8px;letter-spacing:-.015em;text-wrap:balance}
.kit-t p{margin:0;color:var(--muted);font-size:15px}
.kit-t .tag{display:inline-block;background:var(--tint);color:var(--blue-ink);font-size:12px;font-weight:600;border-radius:var(--r-pill);padding:4px 12px}
.kit-f input[type=email]{margin-bottom:10px}
.kit-f .btn{margin-top:0}
.kit-f .chk.small{margin:12px 0 0;font-size:12.5px;color:var(--muted)}
.kit-f .chk.small span{color:var(--muted)}
@media (max-width:820px){.flow-3{grid-template-columns:1fr}.kit{grid-template-columns:1fr;padding:26px 22px}}

.card .status{position:absolute;top:22px;right:22px;font-size:12px;font-weight:600;border-radius:var(--r-pill);padding:4px 11px;background:#F4F4F6;color:var(--muted)}
.card .status.live{background:#E8F7EE;color:#1B7F4B}
.card .status.live::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:#2DB56A;margin-right:6px;vertical-align:1px}
.card .status.soon{background:var(--tint);color:var(--blue-ink)}
.card .status.done{background:#F4F4F6;color:var(--soft)}

@media (max-width:640px){
  .hero .sub{text-align:left}
  .cta{width:100%;min-width:0}
  .card .pimg{max-width:200px}
  .trust{gap:6px 16px;text-align:left;justify-content:flex-start}
  .card .status{top:18px;right:18px}
}

.hl-link{color:var(--blue-ink);text-decoration:underline;text-decoration-color:rgba(29,95,196,.35);text-underline-offset:4px;text-decoration-thickness:2px;font-weight:600}
.hl-link:hover{text-decoration-color:var(--blue-ink)}
.trust-line{margin:14px 0 0;font-size:13px;color:var(--muted);text-align:center}
.trust-line a{color:var(--blue-ink)}
.is-hero .title{margin-bottom:12px}
.hero .sub{margin-bottom:22px}
#prizes.sec{margin-top:56px}
@media (max-width:640px){#prizes.sec{margin-top:40px}.hero .sub{margin-bottom:18px}.trust-line{text-align:left;line-height:1.7}}

.acts{display:flex;flex-direction:column;gap:8px;margin-top:4px}
.act{display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fff;border:1px solid var(--hair-2);border-radius:var(--r-sm);padding:11px 14px;font-size:14px;font-weight:600;color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .15s}
.act:hover{text-decoration:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(60,144,240,.14)}
.act::after{content:"›";color:var(--soft);font-size:18px;line-height:0}
.act.off{color:var(--soft);background:#F7F7F9;border-style:dashed;cursor:default}
.act.off::after{content:""}
.act .when-open{font-size:12px;font-weight:500;color:var(--soft)}
.do-note{margin-top:8px;color:var(--muted);font-size:12.5px}