:root {
  color-scheme: light;
  --navy: #0c1838;
  --ink: #17294d;
  --blue: #2455dd;
  --gold: #f8d475;
  --muted: #52627b;
  --line: #dce5f1;
  --pale: #f3f6fc;
  --font: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); background: #fff; font: 16px/1.95 var(--font); letter-spacing: .025em; overflow-wrap: anywhere; }
a { color: #214cc4; text-underline-offset: .25em; }
a, button, input { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, audio:focus-visible { outline: 3px solid #ba7c09; outline-offset: 5px; }
button, input { font: inherit; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-feature-settings: "palt"; text-wrap: balance; }
h1 { font-size: clamp(36px, 4.9vw, 59px); line-height: 1.4; font-weight: 900; letter-spacing: -.035em; }
h2 { font-size: clamp(27px, 3.6vw, 36px); line-height: 1.55; font-weight: 800; letter-spacing: -.02em; }
h3 { font-size: 23px; line-height: 1.6; }
p + p { margin-top: 1em; }
.wrap { width: min(800px, calc(100% - 48px)); margin-inline: auto; }
.wide { width: min(1080px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 10; top: 8px; left: 8px; padding: 8px 16px; background: #fff; transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.preview-bar { padding: 9px 20px; background: #eaf0fa; text-align: center; color: #3d5272; font-size: 12px; line-height: 1.8; }
.preview-bar strong { margin-right: 10px; color: #1c4198; }
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 15px; }
.brand { color: var(--ink); text-decoration: none; line-height: 1.5; }
.brand strong { display: block; font-size: 20px; letter-spacing: .1em; }
.brand small { display: block; color: var(--muted); font-size: 10px; letter-spacing: .14em; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 20px; font-size: 12px; font-weight: 700; }
.site-nav a { padding-block: 5px; color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--blue); border-color: var(--blue); }
.hero { position: relative; isolation: isolate; overflow: hidden; color: #fff; background: radial-gradient(ellipse at 92% 105%, #3266d8, transparent 60%), linear-gradient(118deg, #0c1838, #19367b); }
.hero-inner { display: grid; grid-template-columns: 1.3fr .7fr; gap: 28px; align-items: center; padding-block: 78px 70px; }
.eyebrow { margin-bottom: 16px; color: #2855bc; font-size: 11px; font-weight: 800; letter-spacing: .16em; line-height: 1.8; }
.hero .eyebrow { color: var(--gold); }
.hero h1 span { color: var(--gold); }
.hero-lead { max-width: 37em; margin-top: 24px; color: #e1eaff; line-height: 2; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 25px; margin-top: 30px; }
.hero-note { margin-top: 15px; color: #d6e3ff; font-size: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 28px; min-height: 56px; max-width: 100%; padding: 13px 26px; border: 1px solid #e9b65b; border-radius: 5px; background: linear-gradient(110deg, #ffd580, #ffc05b); color: #172d57; box-shadow: 0 4px 0 #ba8634; font-weight: 800; font-size: 15px; line-height: 1.7; text-align: center; text-decoration: none; }
a.button:hover { background: #ffe0a1; }
.button.secondary { color: #214cc4; background: #fff; border-color: #b2c4e7; box-shadow: none; }
.button.secondary:hover { background: #eff4ff; }
.quiet-link { color: #e1eaff; font-size: 13px; }
.sound-art { position: relative; display: grid; place-items: center; width: min(100%, 330px); aspect-ratio: 1; margin-inline: auto; }
.sound-art::before, .sound-art::after { content: ""; position: absolute; width: 100%; height: 100%; border: 1px solid #b8cdff45; border-radius: 50%; }
.sound-art::after { width: 78%; height: 78%; border-color: #d6e3ff80; }
.sound-core { display: grid; place-content: center; width: 59%; height: 59%; border-radius: 50%; border: 1px solid #d4bc7880; background: radial-gradient(circle at 33% 24%, #3b5c99, #122955 75%); box-shadow: 0 0 90px #a7c9ff24, inset 0 0 50px #bcd7ff14; text-align: center; }
.sound-core span { color: #f5d48b; font: 300 62px/1.1 Georgia, serif; }
.sound-core small { margin-top: 9px; font-size: 9px; letter-spacing: .18em; color: #e0e9fb; }
.hero-meta { padding-block: 17px; background: #07163140; border-top: 1px solid #ffffff2b; }
.hero-meta .wide { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 34px; color: #e4edff; font-size: 13px; }
.section { padding-block: 76px; }
.section.pale { background: var(--pale); }
.section-heading { margin-bottom: 34px; }
.section-heading .eyebrow { margin-bottom: 10px; }
.section-intro { margin-top: 20px; color: var(--muted); }
.delivery-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.delivery-item { display: grid; grid-template-columns: 72px 1fr auto; align-items: start; gap: 20px; padding-block: 28px; border-bottom: 1px solid var(--line); }
.item-number { padding-top: 4px; color: #a27b28; font: 400 32px/1.3 Georgia, serif; }
.item-copy p { margin-top: 8px; color: var(--muted); font-size: 15px; }
.item-meta { padding-top: 9px; color: #385279; font-size: 12px; white-space: nowrap; }
.flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin: 0; padding: 0; list-style: none; }
.flow li { border-top: 2px solid #b9cae8; padding-top: 18px; }
.flow .step-number { color: #2455bd; font: 400 29px/1.4 Georgia, serif; }
.flow h3 { margin-top: 12px; font-size: 18px; }
.flow p { margin-top: 9px; color: var(--muted); font-size: 14px; }
.signup-panel { margin-top: 32px; padding: 36px 40px; border: 1px solid #ccd8ed; border-top: 4px solid var(--blue); border-radius: 5px; background: #fff; box-shadow: 0 15px 40px #17346a09; }
.sample-label { display: inline-block; padding: 3px 11px; color: #3a557e; background: #edf2fb; font-size: 12px; font-weight: 700; }
.sample-help { margin-top: 14px; color: var(--muted); font-size: 14px; }
.fields { border: 0; padding: 0; margin: 28px 0 0; min-width: 0; }
.fields legend { margin-bottom: 20px; font-size: 19px; font-weight: 800; }
.field { margin-bottom: 24px; }
.field label { display: block; margin-bottom: 8px; font-weight: 700; font-size: 14px; }
.required { margin-left: 10px; color: #3b5379; font-size: 11px; font-weight: 400; }
.field input { display: block; width: 100%; min-width: 0; min-height: 52px; padding: 12px 14px; color: var(--ink); background: #fff; border: 1px solid #a8bad6; border-radius: 3px; font-size: 16px; }
.field small { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
.consent { font-size: 13px; color: var(--muted); line-height: 1.9; }
.signup-panel .signup-link { width: 100%; margin-top: 23px; cursor: pointer; }
.signup-panel button:disabled { opacity: 1; background: #e1e7f1; color: #4d607e; border-color: #b7c4da; box-shadow: none; }
.review-note { margin-top: 24px; padding-left: 18px; border-left: 3px solid #b9c9e4; color: var(--muted); font-size: 13px; }
.preview-links { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-top: 25px; font-size: 14px; font-weight: 700; }
.receive-hero { padding-block: 60px 50px; }
.receive-hero h1 { font-size: clamp(32px, 4.8vw, 48px); }
.receive-hero .hero-lead { max-width: 46em; }
.resource { margin-top: 35px; padding-top: 35px; border-top: 1px solid var(--line); }
.resource:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.resource-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.resource-meta { color: var(--muted); font-size: 12px; white-space: nowrap; }
.resource-description { margin-top: 14px; color: var(--muted); font-size: 15px; }
.player { margin-top: 25px; padding: 24px; border-radius: 5px; background: #eef3fc; }
audio { display: block; width: 100%; max-width: 100%; }
.player p { margin-top: 12px; color: var(--muted); font-size: 12px; }
.resource-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin-top: 23px; font-size: 14px; }
.listen-note { margin-top: 20px; color: var(--muted); font-size: 13px; }
.check-list { padding-left: 1.3em; margin: 20px 0 0; color: var(--muted); font-size: 14px; }
.check-list li + li { margin-top: 10px; }
.mail-intro { margin-bottom: 25px; color: var(--muted); font-size: 14px; }
.mail-subject { padding: 20px 26px; background: #eef3fc; border: 1px solid var(--line); border-bottom: 0; font-weight: 700; }
.mail-body { margin: 0; padding: 30px 26px; border: 1px solid var(--line); background: #fff; font: 15px/1.95 var(--font); white-space: pre-wrap; overflow-wrap: anywhere; }
.site-footer { padding-block: 28px; background: var(--navy); color: #d9e5fa; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 26px; align-items: center; font-size: 12px; }
.site-footer a { color: #d9e5fa; }
.footer-title { color: #fff; font-weight: 700; }
@media (max-width: 760px) {
  .wide, .wrap { width: calc(100% - 40px); }
  .header-inner { min-height: 82px; gap: 14px; flex-wrap: wrap; }
  .brand strong { font-size: 18px; }
  .site-nav { justify-content: flex-start; gap: 3px 18px; }
  .hero-inner { grid-template-columns: 1fr; padding-block: 48px 40px; gap: 25px; }
  .sound-art { width: 190px; }
  .sound-core span { font-size: 40px; }
  .sound-core small { font-size: 7px; }
  .hero-actions { gap: 17px; }
  .hero-meta .wide { gap: 5px 20px; font-size: 12px; }
  .section { padding-block: 50px; }
  .flow { grid-template-columns: 1fr; gap: 22px; }
  .flow li { display: grid; grid-template-columns: 45px 1fr; column-gap: 12px; padding-top: 14px; }
  .flow h3 { margin-top: 3px; }
  .flow p { grid-column: 2; margin-top: 5px; }
  .delivery-item { grid-template-columns: 40px 1fr; gap: 12px; padding-block: 23px; }
  .item-meta { grid-column: 2; padding-top: 0; }
  .signup-panel { padding: 26px 22px; }
  .resource-head { flex-wrap: wrap; gap: 4px; }
  .player { padding: 16px 12px; }
  .receive-hero { padding-block: 44px 38px; }
  .mail-subject, .mail-body { padding: 22px 18px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.completion-mark { display: grid; place-items: center; width: 64px; height: 64px; margin-bottom: 26px; border: 1px solid #f8d475a0; border-radius: 50%; background: #ffffff0d; color: var(--gold); font-size: 30px; line-height: 1; }
.mail-subject-box { margin-top: 24px; padding: 22px 26px; border-left: 3px solid var(--blue); background: var(--pale); }
.mail-subject-box span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 5px; }
.mail-subject-box strong { font-size: 17px; line-height: 1.8; }
.trouble-list { margin: 28px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.trouble-list li { display: grid; grid-template-columns: 38px 1fr; gap: 16px; padding-block: 22px; border-bottom: 1px solid var(--line); }
.trouble-list .step-number { color: #2952b5; font: 400 28px/1.5 Georgia, serif; }
.trouble-list h3 { font-size: 18px; }
.trouble-list p { margin-top: 5px; font-size: 14px; color: var(--muted); }
@media (max-width: 760px) { .mail-subject-box { padding: 20px; } }

.book-note{margin-top:24px;padding-top:20px;border-top:1px solid #ffffff30;color:#e1eaff;font-size:13px;line-height:1.9}.book-note strong{display:block;color:#f8d475;margin-bottom:5px}.brand small{letter-spacing:.035em}.section-heading::after{content:"";display:block;width:42px;height:3px;background:var(--gold);margin-top:22px}.lesson-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.lesson-list li{display:grid;grid-template-columns:55px 135px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline}.lesson-list .lesson-no{color:var(--blue);font-size:13px;font-weight:800}.lesson-day{color:var(--muted);font-size:13px}.lesson-list h3{font-size:18px}.lesson-list p{font-size:13px;color:var(--muted);margin-top:4px}.newsletter-note{margin-top:24px;padding:22px 24px;background:var(--pale);border-left:3px solid var(--blue);font-size:14px}.signup-details{margin:24px 0}.signup-details>div{display:grid;grid-template-columns:150px 1fr;border-top:1px solid var(--line);padding:14px 0;gap:15px}.signup-details>div:last-child{border-bottom:1px solid var(--line)}.signup-details dt{font-weight:700}.signup-details dd{margin:0;color:var(--muted);font-size:14px}.policy-links{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px;font-size:13px}.signup-note{font-size:12px;color:var(--muted);margin-top:15px}.sender-box{margin-top:15px;color:var(--muted);font-size:14px}.preview-bar a{color:#214cc4}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:32px}.preview-card{display:block;padding:25px;border:1px solid var(--line);border-top:3px solid var(--blue);border-radius:4px;text-decoration:none;background:white;color:var(--ink)}.preview-card strong{display:block;font-size:19px;color:var(--blue);margin-bottom:9px}.preview-card span{font-size:14px;color:var(--muted)}.preview-main{padding:60px 0}.preview-main h1{font-size:34px}.preview-main>p{margin-top:22px}.preview-main .review-note{margin-top:32px}
@media(max-width:760px){.lesson-list li{grid-template-columns:42px 1fr;gap:5px 14px;padding:18px 0}.lesson-list li>div:last-child{grid-column:2}.lesson-list h3{font-size:17px}.signup-details>div{grid-template-columns:1fr;gap:4px}.preview-grid{grid-template-columns:1fr}.preview-main{padding:40px 0}.preview-main h1{font-size:28px}.newsletter-note{padding:18px}.book-note{font-size:12px}}

/* Embedded Asumeru form: visible labels and actual editable inputs. */
.signup-form{margin-top:4px}.signup-form fieldset{min-width:0;margin:0;padding:0;border:0}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.signup-form .form-row{padding:22px 0;border-top:1px solid var(--line)}.signup-form label{display:flex;align-items:center;gap:12px;margin-bottom:11px;font-size:15px;font-weight:800;color:var(--ink)}.required-label,.optional-label{display:inline-flex;align-items:center;padding:2px 8px;border-radius:3px;font-size:11px;font-weight:700;line-height:1.7}.required-label{background:#214cc4;color:#fff}.optional-label{background:#edf1f7;color:#526581}.signup-form .signup-input{display:block;width:100%;max-width:100%;min-height:54px;padding:13px 16px;border:1px solid #aabbd7;border-radius:5px;background:#fff;color:var(--ink);font:inherit;font-size:16px;line-height:1.7;box-shadow:inset 0 1px 2px #10234805}.signup-form .signup-input::placeholder{color:#78869a}.signup-form .signup-input:focus{border-color:var(--blue)}.signup-form .field-help{margin-top:8px;color:var(--muted);font-size:12px;line-height:1.8}.signup-form .consent{margin-top:16px}.signup-form .signup-submit{display:flex;width:100%;margin-top:24px;cursor:pointer}.signup-form .signup-submit:disabled{cursor:not-allowed}.preview-explanation{padding:14px 18px;margin-bottom:24px;background:#edf2fb;border-left:3px solid #214cc4;color:#28436c;font-size:13px}.preview-explanation strong{display:block}
@media(max-width:600px){.signup-form .form-row{padding:19px 0}.signup-form .signup-input{min-height:52px;padding:12px 13px}.signup-form .signup-submit{gap:14px;font-size:14px}}