/* ISSO Matsushima Seaside Stay
   Direction (client, 2026-10-12): quiet, white, generous space. Mincho type with wide
   tracking, hairline rules instead of boxes, full-bleed photography, small uppercase
   Latin labels. Brand black-blue #384E5E (the exterior wall) is the only accent.
   No web fonts: system mincho (Hiragino / Yu / Noto Serif CJK on Android). */

:root {
  --brand: #384e5e;
  --brand-dark: #26353f;
  --brand-soft: #eef1f3;
  --ink: #22292e;
  --ink-2: #5b6469;
  --paper: #fcfcfa;
  --line: #e2e4e5;
  --wrap: 1120px;
  --mincho: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "Noto Serif CJK JP", serif;
  --latin: Futura, "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
  --sans: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  --space: clamp(80px, 12vw, 160px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 15px/2.1 var(--mincho); letter-spacing: .08em;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 68px; /* room for the mobile booking bar */
}
:lang(en) body, body:lang(en) { letter-spacing: .02em; line-height: 1.85; }
img { max-width: 100%; display: block; }
a { color: var(--ink); text-underline-offset: 5px; text-decoration-thickness: 1px; text-decoration-color: var(--line); }
a:hover { color: var(--brand); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--mincho); font-weight: 400; line-height: 1.7; letter-spacing: .16em; margin: 0 0 1em; color: var(--ink); }
:lang(en) h1, :lang(en) h2, :lang(en) h3 { letter-spacing: .04em; line-height: 1.4; }
.hero h1, .band-dark h2 { color: inherit; }
h1 { font-size: clamp(1.45rem, 3.6vw, 2.1rem); }
h2 { font-size: clamp(1.2rem, 2.6vw, 1.5rem); }
h3 { font-size: 1.02rem; letter-spacing: .12em; }
p { margin: 0 0 1.4em; }
strong { font-weight: 600; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.eyebrow { font: 500 .68rem/1.6 var(--latin); letter-spacing: .32em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 1.6em; display: flex; align-items: center; gap: 14px; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; opacity: .6; }
.lead { font-size: 1rem; color: var(--ink-2); line-height: 2.2; }
.fine { font-size: .78rem; color: var(--ink-2); line-height: 1.9; }

/* header */
.site-head { position: sticky; top: 0; z-index: 30; background: rgba(252, 252, 250, .92); backdrop-filter: blur(10px); }
.head-row { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--brand); margin: 0; }
.logo .logo-mark { height: 34px; width: auto; }
.logo .logo-word { height: 13px; width: auto; }
.nav-desktop { display: none; gap: 30px; }
.nav-desktop a, .lang { color: var(--ink); text-decoration: none; font-size: .8rem; letter-spacing: .14em; }
.nav-desktop a[aria-current], .nav-desktop a:hover { color: var(--brand); text-decoration: underline; text-decoration-color: currentColor; }
.head-actions { display: flex; align-items: center; gap: 18px; }
.lang { font: 500 .66rem var(--latin); letter-spacing: .24em; text-transform: uppercase; padding: 4px 0; border-bottom: 1px solid var(--line); }
.nav-mobile summary { list-style: none; cursor: pointer; width: 40px; height: 40px; display: grid; place-items: center; }
.nav-mobile summary::-webkit-details-marker { display: none; }
.nav-mobile summary span, .nav-mobile summary span::before, .nav-mobile summary span::after { display: block; width: 24px; height: 1px; background: var(--ink); position: relative; content: ""; }
.nav-mobile summary span::before { position: absolute; top: -6px; }
.nav-mobile summary span::after { position: absolute; top: 6px; }
.nav-mobile nav { position: absolute; left: 0; right: 0; top: 72px; background: var(--paper); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; padding: 12px 24px 28px; }
.nav-mobile nav a { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; letter-spacing: .14em; font-size: .92rem; }
.btn.hide-sm { display: none; }
@media (min-width: 960px) {
  .nav-desktop { display: flex; }
  .nav-mobile { display: none; }
  .btn.hide-sm { display: inline-flex; }
}

/* buttons: square, thin, quiet. The one filled button is the booking action. */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 50px; padding: 0 28px; border-radius: 0; text-decoration: none; border: 1px solid transparent; cursor: pointer; font: 400 .86rem/1 var(--mincho); letter-spacing: .18em; transition: background .25s, color .25s, border-color .25s; }
.btn::after { content: ""; width: 22px; height: 1px; background: currentColor; transition: width .25s; }
.btn:hover::after { width: 32px; }
.btn-sm { min-height: 40px; padding: 0 18px; font-size: .78rem; }
.btn-sm::after { display: none; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.btn-wide { width: 100%; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* hero: full-bleed photo, small spaced copy, one hairline */
.hero { position: relative; color: #fff; background: var(--brand); }
.hero .photo { aspect-ratio: auto !important; height: 100svh; min-height: 520px; max-height: 900px; }
.hero .photo img { width: 100%; height: 100%; object-fit: cover; }
.hero-copy { position: absolute; inset: auto 0 0 0; padding: 0 0 clamp(40px, 8vh, 80px); background: linear-gradient(rgba(20, 28, 33, 0) 0%, rgba(20, 28, 33, .55) 70%); }
.hero-copy .wrap { border-left: 1px solid rgba(255, 255, 255, .55); padding-left: clamp(20px, 3vw, 36px); margin-left: max(24px, calc((100% - var(--wrap)) / 2 + 24px)); }
@media (max-width: 700px) { .hero-copy { background: linear-gradient(rgba(20, 28, 33, .15), rgba(20, 28, 33, .7) 40%); } }
.hero .eyebrow { color: rgba(255, 255, 255, .85); }
.hero h1 { font-size: clamp(1.6rem, 4.4vw, 2.6rem); letter-spacing: .24em; margin-bottom: .9em; }
.hero p { max-width: 30em; font-size: .9rem; line-height: 2.2; }
.hero .facts-inline { display: flex; flex-wrap: wrap; gap: 6px 26px; font-size: .78rem; margin: 0 0 28px; padding: 0; list-style: none; letter-spacing: .14em; opacity: .9; }
.hero .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .8); }
.hero .btn-ghost:hover { background: #fff; color: var(--ink); }
.hero .btn-primary { background: #fff; color: var(--ink); }
.hero .btn-primary:hover { background: var(--brand-soft); color: var(--ink); }

/* photos: no rounding, no frames */
.photo { display: block; overflow: hidden; background: var(--brand-soft); margin: 0; }
.photo img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s ease; }
a:hover .photo img, .spot:hover .photo img { transform: scale(1.03); }
@media (prefers-reduced-motion: reduce) { .photo img { transition: none; } a:hover .photo img, .spot:hover .photo img { transform: none; } }
.ph { display: grid; place-items: end start; background: linear-gradient(160deg, #c9d1d6, #8a9ca8); }
.ph span { font: 500 .62rem/1 var(--latin); letter-spacing: .24em; color: rgba(255, 255, 255, .85); padding: 14px; }

/* sections: space does the separating */
section, .section { padding: var(--space) 0 0; }
main > section:last-child, main > div:last-child { padding-bottom: var(--space); }
.band { background: transparent; }
.band-dark { background: var(--brand); color: #eef2f4; }
.band-dark a { color: #fff; }
.band-dark .eyebrow { color: #c4d0d8; }
.page-head { padding: clamp(56px, 9vw, 120px) 0 0; }
.page-head h1 { margin-bottom: 1.2em; }
.split { display: grid; gap: 40px; align-items: center; }
@media (min-width: 820px) { .split { grid-template-columns: 1.15fr 1fr; gap: clamp(48px, 7vw, 110px); } .split.rev { grid-template-columns: 1fr 1.15fr; } .split.rev > :first-child { order: 2; } }
.grid { display: grid; gap: 40px 32px; }
@media (min-width: 700px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .grid.three, .grid.trips { grid-template-columns: repeat(3, 1fr); } }
.card { background: transparent; border: 0; border-top: 1px solid var(--line); padding: 26px 0 0; }
.card h3 { font-size: 1rem; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a::after { content: " ―"; color: var(--ink-2); }
.card h3 a:hover { color: var(--brand); }
.card p { color: var(--ink-2); font-size: .9rem; }
.card.trip[hidden] { display: none; }
nav.card { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 22px 0; margin-top: 40px; font-size: .88rem; }
nav.card ol { padding-left: 1.4em; }
.why { counter-reset: why; list-style: none; padding: 0; margin: 0; display: grid; gap: 56px; }
@media (min-width: 820px) { .why { grid-template-columns: repeat(3, 1fr); gap: 48px; } }
.why li { counter-increment: why; border-top: 1px solid var(--ink); padding-top: 24px; }
.why li::before { content: "0" counter(why); font: 400 .72rem var(--latin); color: var(--ink-2); letter-spacing: .24em; }
.why h3 { margin: 14px 0 14px; }
.why p { font-size: .9rem; color: var(--ink-2); }

/* lists & tables: hairlines only */
ul.checks, ul.notes { padding: 0; list-style: none; margin: 0 0 1.4em; }
ul.checks li, ul.notes li { padding: 10px 0 10px 1.8em; position: relative; border-bottom: 1px solid var(--line); font-size: .92rem; }
ul.checks li::before { content: ""; position: absolute; left: 0; top: 1.35em; width: .9em; height: 1px; background: var(--brand); }
ul.notes li::before { content: "※"; position: absolute; left: 0; color: var(--ink-2); }
ul.cols { columns: 1; padding-left: 1.2em; font-size: .92rem; }
@media (min-width: 700px) { ul.cols { columns: 2; column-gap: 56px; } }
table.facts { width: 100%; border-collapse: collapse; font-size: .9rem; border-top: 1px solid var(--ink); }
table.facts th, table.facts td { text-align: left; padding: 16px 12px 16px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
table.facts th { width: 34%; font-weight: 400; color: var(--ink-2); letter-spacing: .12em; }
table.facts thead th { color: var(--ink); border-bottom-color: var(--ink); }

/* timeline */
.day { padding: 40px 0 8px; }
.timeline { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--line); }
.timeline li { position: relative; padding: 0 0 26px 28px; }
.timeline li::before { content: ""; position: absolute; left: -4px; top: 13px; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }
.timeline time { font: 400 .76rem var(--latin); color: var(--ink-2); letter-spacing: .16em; font-variant-numeric: tabular-nums; }
.timeline p { margin: 0; font-size: .92rem; }
.callout { background: transparent; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); padding: 28px 0; margin: 40px 0; }

/* planner */
.planner { background: transparent; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); padding: 32px 0 24px; margin-bottom: 48px; }
.planner fieldset { border: 0; padding: 0; margin: 0 0 22px; }
.planner legend { font-size: .86rem; letter-spacing: .16em; margin-bottom: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label { position: relative; }
.chips input { position: absolute; opacity: 0; inset: 0; }
.chips span { display: inline-block; padding: 8px 16px; border: 1px solid var(--line); cursor: pointer; font-size: .84rem; letter-spacing: .1em; background: transparent; transition: border-color .2s; }
.chips span:hover { border-color: var(--ink); }
.chips input:checked + span { background: var(--ink); color: #fff; border-color: var(--ink); }
.chips input:focus-visible + span { outline: 2px solid var(--brand); outline-offset: 2px; }
.planner-result { font-size: .86rem; letter-spacing: .12em; margin: 0 0 20px; color: var(--ink-2); }

/* booking */
.book-form { background: transparent; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); padding: 32px 0; }
.book-form .row { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; margin-bottom: 24px; }
.book-form .row label:first-child { grid-column: 1 / -1; }
@media (min-width: 700px) { .book-form .row { grid-template-columns: 2fr 1fr 1fr; } .book-form .row label:first-child { grid-column: auto; } }
.book-form label { display: flex; flex-direction: column; font-size: .76rem; letter-spacing: .16em; gap: 8px; color: var(--ink-2); }
.book-form input, .book-form select { font: 400 1rem var(--mincho); letter-spacing: .06em; min-height: 50px; padding: 0 2px; border: 0; border-bottom: 1px solid var(--ink); border-radius: 0; background: transparent; color: var(--ink); -webkit-appearance: none; appearance: none; }
.book-form select { background: linear-gradient(45deg, transparent 50%, var(--ink) 50%) right 6px center / 6px 6px no-repeat, transparent; padding-right: 22px; }
.scores { display: flex; flex-wrap: wrap; gap: 48px; margin-bottom: 12px; }
.score { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); }
.score strong { font: 400 1.9rem/1.2 var(--mincho); letter-spacing: .06em; }
.score span { font: 400 .7rem var(--latin); letter-spacing: .18em; color: var(--ink-2); text-transform: uppercase; }
blockquote.review { margin: 0; padding: 28px 0 0; border-top: 1px solid var(--line); font-size: .95rem; line-height: 2.2; }
blockquote.review footer { font-size: .76rem; color: var(--ink-2); margin-top: 14px; letter-spacing: .1em; }

/* faq */
details.faq { border-bottom: 1px solid var(--line); }
details.faq:first-of-type { border-top: 1px solid var(--line); }
details.faq summary { cursor: pointer; font-size: .95rem; padding: 22px 40px 22px 0; position: relative; list-style: none; letter-spacing: .1em; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::before, details.faq summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 14px; height: 1px; background: var(--ink); transition: transform .25s; }
details.faq summary::after { transform: rotate(90deg); }
details.faq[open] summary::after { transform: rotate(0deg); }
details.faq > :not(summary) { margin: 0 0 24px; font-size: .9rem; color: var(--ink-2); }
.faq-group { margin-bottom: 72px; }
.faq-group h2 { font-size: 1.05rem; }

/* breadcrumbs */
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 18px 24px 0; margin: 0 auto; max-width: var(--wrap); font-size: .7rem; letter-spacing: .14em; color: var(--ink-2); }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.crumbs li + li::before { content: "―"; margin-right: 10px; opacity: .5; }

/* page-end next step: centered, airy, a hairline above */
.next { text-align: center; background: transparent; padding: var(--space) 24px; margin: 0 auto; max-width: 720px; }
.next h2 { font-size: clamp(1.15rem, 2.4vw, 1.4rem); }
.next p { color: var(--ink-2); font-size: .9rem; }
.next .actions { justify-content: center; margin-top: 32px; }

/* footer: light, small, spaced */
.site-foot { background: var(--paper); color: var(--ink-2); padding: 72px 0 32px; font-size: .8rem; border-top: 1px solid var(--line); letter-spacing: .1em; }
.site-foot a { color: var(--ink); text-decoration: none; }
.site-foot a:hover { color: var(--brand); }
.site-foot .logo { color: var(--brand); margin-bottom: 24px; }
.site-foot .logo .logo-mark { height: 48px; }
.site-foot .logo .logo-word { height: 16px; }
.site-foot address { font-style: normal; }
.foot-grid { display: grid; gap: 48px; }
.foot-grid nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; align-content: start; }
@media (min-width: 820px) { .foot-grid { grid-template-columns: 1.2fr 1fr; } }
.foot-fine { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 20px; font-size: .68rem; }
.foot-fine p { margin: 0 0 4px; }
.foot-fine a { text-decoration: underline 1px var(--line); } /* inline link: the site's hairline underline */
.foot-fine a:hover { text-decoration-color: currentColor; }

/* sticky booking bar (mobile): slim, white, one hairline */
.sticky { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 16px calc(8px + env(safe-area-inset-bottom)); background: rgba(252, 252, 250, .96); border-top: 1px solid var(--line); }
.sticky p { margin: 0; line-height: 1.5; display: flex; flex-direction: column; }
.sticky strong { font-size: .84rem; font-weight: 400; letter-spacing: .12em; }
.sticky span { font-size: .66rem; color: var(--ink-2); letter-spacing: .08em; }
.sticky .btn { min-height: 44px; padding: 0 20px; font-size: .8rem; }
.sticky .btn::after { display: none; }
@media (min-width: 960px) { .sticky { display: none; } body { padding-bottom: 0; } }
body.page-book { padding-bottom: 0; }
.estimate { margin: 0 0 16px; font-variant-numeric: tabular-nums; }
table.prices th, table.prices td { width: auto; text-align: right; font-variant-numeric: tabular-nums; }
table.prices th[scope="row"], table.prices thead th:first-child { text-align: left; }

/* floor plan */
.plan { margin: 0; color: var(--brand); }
.plan img { width: 100%; height: auto; }
.plan figcaption { margin-top: 28px; }
.shot { margin: 0; }
.shot figcaption { margin-top: 10px; }

/* hero video: poster loads first; video fades in when ready, plays once, rests on the last
   frame. Never loaded for reduced-motion or data-saver users; pausable (WCAG 2.2.2). */
.hero .photo { position: relative; }
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 1.6s ease; }
.hero-video.on { opacity: 1; }
.motion-toggle { position: absolute; top: 18px; right: 18px; z-index: 2; width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(255,255,255,.6); background: transparent; color: #fff; cursor: pointer; display: none; place-items: center; }
.hero.has-video .motion-toggle { display: grid; }
.motion-toggle svg { width: 12px; height: 12px; fill: currentColor; }
.motion-toggle .play, .hero.paused .motion-toggle .pause { display: none; }
.hero.paused .motion-toggle .play { display: block; }
.narrow-shot { max-width: 320px; margin-top: 28px; }
.narrow > .photo, .narrow > h2 + .photo { margin-bottom: 40px; }

/* area guide spots: image + words, no boxes */
.spots { display: grid; gap: 56px 32px; margin: 40px 0 16px; }
@media (min-width: 620px) { .spots { grid-template-columns: 1fr 1fr; } .spot-feature { grid-column: 1 / -1; } }
.spot { background: transparent; border: 0; }
.spot h3 { margin: 20px 0 10px; font-size: 1rem; }
.spot p { margin: 0; font-size: .88rem; color: var(--ink-2); line-height: 2.05; }
.spot p + p { margin-top: .8em; }
.spot-text { border-top: 1px solid var(--line); padding-top: 6px; }
.spot-feature h3 { font-size: 1.2rem; letter-spacing: .18em; margin-top: 12px; }
.spot-feature p { font-size: .95rem; max-width: 40em; }
.spot .badge { display: inline-flex; align-items: center; gap: 10px; margin: 26px 0 0; padding: 0; background: none; color: var(--brand); font: 500 .66rem/1 var(--latin); letter-spacing: .3em; text-transform: uppercase; }
.spot .badge::before { content: ""; width: 24px; height: 1px; background: currentColor; }
.spot .badge + h3 { margin-top: 12px; }
.spot .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.photo-c { position: relative; }
.photo-c .cr { position: absolute; right: 0; bottom: 0; max-width: 100%; padding: 2px 6px; font-size: 10px; line-height: 1.4; color: #fff; background: rgba(0,0,0,.45); text-decoration: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.spots .stack { display: grid; gap: 32px; align-content: start; }
@media (min-width: 620px) { .spots .stack { grid-template-rows: 1fr 1fr; align-content: stretch; } }
.spot-text h3 { margin-top: 16px; }

/* home intro under the hero: the brand lines, given room */
.intro .intro-lines { font-size: clamp(1.1rem, 2.4vw, 1.4rem); line-height: 2.4; letter-spacing: .3em; color: var(--ink); margin-bottom: 2.2em; }
:lang(en) .intro .intro-lines { letter-spacing: .06em; line-height: 1.9; }
.intro p { color: var(--ink-2); font-size: .92rem; line-height: 2.3; }
.intro .facts-inline { display: flex; flex-wrap: wrap; gap: 8px 28px; list-style: none; padding: 24px 0 0; margin: 40px 0 0; border-top: 1px solid var(--line); font-size: .8rem; letter-spacing: .14em; color: var(--ink); }
.split:not(:has(.photo)) { align-items: start; }
@media (max-width: 480px) { .hero h1 { font-size: 1.45rem; letter-spacing: .16em; } .hero-copy .wrap { padding-left: 18px; } }

/* OTA-mode booking choices */
.ota-grid { display: grid; gap: 32px; margin: 8px 0 20px; }
@media (min-width: 620px) { .ota-grid { grid-template-columns: 1fr 1fr; } }
.ota-choice { border-top: 1px solid var(--line); padding-top: 18px; display: flex; flex-direction: column; }
/* names stay plain text: Airbnb's trademark rules allow the name only in the surrounding text style */
.ota-choice .ota-name { margin: 0 0 4px; }
.ota-choice p { font-size: .86rem; color: var(--ink-2); }
.ota-choice .btn { margin-top: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }