/*
  由井せいた 公式サイト
  Round 1: 情報設計・共通デザインシステム
  参照要素倉庫のトレース元:
  - ヘッダー: DECO-022 / 015 primeNumber
  - FV: LAYOUT-017 / 016 Ubie（左コピー・右ビジュアルへ適用）
  - 政策カード: DECO-019 / 012 日本ゼトック
  - テーマ一覧: DECO-011 / 006 安川電機
  - 理念リード: 009 京都きもの学院
  - 相談CTA: 008 ビズリーチ
  - フッター: DECO-006 / 004 福助
*/
:root {
  --color-primary: #1C3550;
  --color-accent: #AE3257;
  --color-background: #F4F5F6;
  --color-surface: #FFFFFF;
  --color-text: #142538;
  --color-muted: #66717E;
  --color-border: #DDE1E5;
  --color-primary-hover: color-mix(in srgb, var(--color-primary) 88%, #000000);
  --color-accent-hover: color-mix(in srgb, var(--color-accent) 88%, #000000);
  --font-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-en: "Jost", sans-serif;
  --header-h: 72px;
  --content: 1200px;
  --reading: 736px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 120px;
  --radius-btn: 8px;
  --radius-card: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 24px); }
body { background: var(--color-background); color: var(--color-text); font-family: var(--font-ja); font-size: 16px; line-height: 1.8; overflow-x: clip; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }

.inner { width: min(var(--content), calc(100% - 96px)); margin-inline: auto; }
.reading { width: min(var(--reading), calc(100% - 96px)); margin-inline: auto; }
.en { font-family: var(--font-en); letter-spacing: .12em; }
.kicker { color: var(--color-accent); font-family: var(--font-en); font-size: 12px; font-weight: 600; letter-spacing: .16em; line-height: 1.4; text-transform: uppercase; }
.section-head { max-width: 720px; margin-bottom: var(--space-5); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-title { color: var(--color-primary); font-size: clamp(30px, 3.1vw, 42px); font-weight: 700; letter-spacing: .03em; line-height: 1.35; margin-top: var(--space-2); }
.section-lead { color: var(--color-muted); font-size: 16px; margin-top: var(--space-3); }
.section { padding-block: var(--space-8); }
.section--surface { background: var(--color-surface); }
.section--muted { background: var(--color-background); }

.btn { align-items: center; border: 1px solid transparent; border-radius: var(--radius-btn); display: inline-flex; font-size: 16px; font-weight: 600; gap: 12px; justify-content: center; min-height: 52px; padding: 12px 28px; transition: background-color .25s ease, border-color .25s ease, transform .25s ease; }
.btn::after { border-right: 2px solid currentColor; border-top: 2px solid currentColor; content: ""; height: 7px; transform: rotate(45deg); width: 7px; }
.btn:hover { transform: translateY(-2px); }
.btn--accent { background: var(--color-accent); color: var(--color-surface); }
.btn--accent:hover { background: var(--color-accent-hover); }
.btn--primary { background: var(--color-primary); color: var(--color-surface); }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--outline { background: var(--color-surface); border-color: var(--color-primary); color: var(--color-primary); }
.btn--outline:hover { background: var(--color-background); }
.text-link { align-items: center; color: var(--color-primary); display: inline-flex; font-size: 15px; font-weight: 600; gap: 10px; }
.text-link::after { border-right: 2px solid currentColor; border-top: 2px solid currentColor; content: ""; height: 7px; transform: rotate(45deg); width: 7px; }
.text-link:hover { color: var(--color-accent); }

/* DECO-022: fixed header, horizontal navigation and one strong CTA */
.hd { align-items: center; background: var(--color-surface); border-bottom: 1px solid var(--color-border); display: flex; height: var(--header-h); justify-content: space-between; left: 0; padding-left: 48px; position: fixed; right: 0; top: 0; z-index: 50; }
.hd__logo { align-items: baseline; display: flex; gap: 12px; }
.hd__name { color: var(--color-primary); font-size: 20px; font-weight: 700; letter-spacing: .04em; }
.hd__en { color: var(--color-muted); font-family: var(--font-en); font-size: 10px; font-weight: 600; letter-spacing: .18em; }
.hd__right { align-items: center; display: flex; height: 100%; }
.hd__nav ul { align-items: center; display: flex; gap: 28px; margin-right: 28px; }
.hd__nav a { color: var(--color-text); font-size: 14px; font-weight: 600; padding-block: 8px; position: relative; }
.hd__nav a::after { background: var(--color-accent); bottom: 0; content: ""; height: 2px; left: 0; position: absolute; transform: scaleX(0); transform-origin: left; transition: transform .25s ease; width: 100%; }
.hd__nav a:hover, .hd__nav a.is-active { color: var(--color-primary); }
.hd__nav a:hover::after, .hd__nav a.is-active::after { transform: scaleX(1); }
.hd__cta { align-items: center; align-self: stretch; background: var(--color-accent); color: var(--color-surface); display: flex; font-size: 15px; font-weight: 700; gap: 12px; justify-content: center; min-width: 182px; }
.hd__cta:hover { background: var(--color-accent-hover); }
.hd__cta .arw { border-right: 2px solid currentColor; border-top: 2px solid currentColor; height: 7px; transform: rotate(45deg); width: 7px; }
.hd__ham { display: none; }
.drawer, .drawer-ovl { display: none; }

/* LAYOUT-017 adapted to the supplied PC hero composition */
.hero { background: var(--color-surface); padding-top: var(--header-h); }
.hero__inner { min-height: min(760px, calc(90vh - var(--header-h))); overflow: hidden; position: relative; }
.hero__copy { padding-block: 72px; margin-left: max(48px, calc((100vw - var(--content)) / 2)); position: relative; width: min(44%, 540px); z-index: 1; }
.hero__role { color: var(--color-primary); font-size: 14px; font-weight: 600; margin-bottom: var(--space-3); }
.hero__title { color: var(--color-primary); font-size: clamp(48px, 4.4vw, 64px); font-weight: 700; letter-spacing: .02em; line-height: 1.28; margin-top: var(--space-2); }
.hero__lead { color: var(--color-muted); font-size: 17px; margin-top: var(--space-3); max-width: 510px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.hero__labels { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: var(--space-4); }
.hero__labels span { border: 1px solid var(--color-border); color: var(--color-muted); font-size: 13px; padding: 5px 10px; }
.hero__visual { background: var(--color-background); inset: 0; overflow: hidden; position: absolute; z-index: 0; }
.hero__visual img { height: 100%; object-fit: cover; object-position: center; width: 100%; }

/* DECO-019: priority policy grid with numbered cards */
.policy-summary { background: var(--color-background); }
.policy-grid { display: grid; gap: 20px; grid-template-columns: repeat(5, 1fr); }
.policy-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); display: flex; flex-direction: column; min-height: 320px; padding: 28px 24px 24px; transition: border-color .25s ease, transform .25s ease; }
.policy-card:hover { border-color: var(--color-primary); transform: translateY(-3px); }
.policy-card__num { color: var(--color-accent); font-family: var(--font-en); font-size: 14px; font-weight: 600; letter-spacing: .16em; }
.policy-card__category { color: var(--color-muted); font-size: 13px; margin-top: 18px; }
.policy-card h3 { color: var(--color-primary); font-size: 20px; line-height: 1.45; margin-top: 6px; }
.policy-card p { color: var(--color-muted); font-size: 14px; margin-top: 16px; }
.policy-card .text-link { margin-top: auto; padding-top: 20px; }

/* DECO-011: factual assembly-question theme list */
.assembly { background: var(--color-surface); }
.theme-list { border-top: 2px solid var(--color-primary); }
.theme-row { align-items: flex-start; border-bottom: 1px solid var(--color-border); display: grid; gap: 20px; grid-template-columns: 150px 1fr auto; padding: 22px 8px; }
.theme-row__category { color: var(--color-accent); font-size: 13px; font-weight: 600; }
.theme-row h3 { color: var(--color-primary); font-size: 18px; line-height: 1.5; }
.theme-row p { color: var(--color-muted); font-size: 14px; margin-top: 4px; }
.theme-row__year { color: var(--color-muted); font-family: var(--font-en); font-size: 13px; }

/* 009 Kyoto Kimono: a single strong reason and restrained supporting text */
.reason { background: var(--color-primary); color: var(--color-surface); }
.reason .kicker { color: var(--color-surface); opacity: .8; }
.reason__quote { font-size: clamp(28px, 3.2vw, 44px); font-weight: 700; letter-spacing: .03em; line-height: 1.5; margin-top: var(--space-2); max-width: 900px; }
.reason__text { color: color-mix(in srgb, var(--color-surface) 80%, transparent); font-size: 16px; margin-top: var(--space-4); max-width: 736px; }

.profile-brief { background: var(--color-surface); }
.profile-brief__grid { align-items: center; display: grid; gap: 64px; grid-template-columns: 320px minmax(0, 1fr); }
.profile-brief__image { aspect-ratio: 4 / 5; background: var(--color-background); border-radius: var(--radius-card); overflow: hidden; }
.profile-brief__image img { height: 100%; object-fit: cover; object-position: center top; width: 100%; }
.profile-brief__copy { max-width: 680px; }
.profile-brief__copy p { color: var(--color-muted); margin-top: var(--space-3); }
.profile-brief__labels { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--space-3); }
.profile-brief__labels span { border-left: 2px solid var(--color-accent); color: var(--color-primary); font-size: 14px; font-weight: 600; padding-left: 8px; }
.profile-brief__copy .text-link { margin-top: var(--space-4); }

/* The content will be wired in Round 2; the layout is deliberately restrained in Round 1. */
.activity-preview { background: var(--color-background); }
.activity-preview__grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.activity-card, .activity-preview__panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); display: flex; flex-direction: column; min-height: 250px; padding: 28px; }
.activity-card__meta { align-items: center; display: flex; gap: 10px; }
.activity-card__category { color: var(--color-accent); font-family: var(--font-en); font-size: 12px; font-weight: 600; letter-spacing: .13em; }
.activity-card time { color: var(--color-muted); font-family: var(--font-en); font-size: 13px; }
.activity-card h3, .activity-preview__panel h3 { color: var(--color-primary); font-size: 20px; line-height: 1.5; margin-top: 16px; }
.activity-card p, .activity-preview__panel p { color: var(--color-muted); font-size: 14px; margin-top: 10px; }
.activity-card .text-link, .activity-preview__panel .text-link { margin-top: auto; padding-top: 20px; }
.activity-channel { align-items: center; background: var(--color-primary); color: var(--color-surface); display: flex; gap: 24px; grid-column: 1 / -1; padding: 28px 32px; }
.activity-channel__icon { align-items: center; background: var(--color-accent); border-radius: 50%; display: flex; flex: none; height: 44px; justify-content: center; width: 44px; }
.activity-channel h3 { font-size: 20px; }
.activity-channel p { color: color-mix(in srgb, var(--color-surface) 80%, transparent); font-size: 14px; }
.activity-channel .text-link { color: var(--color-surface); margin-left: auto; }
.activity-channel .text-link:hover { color: var(--color-surface); text-decoration: underline; }

/* DECO-014: one consultation CTA before support */
.consult { background: var(--color-surface); padding-block: var(--space-8); }
.consult__box { background: var(--color-primary); border-radius: var(--radius-card); color: var(--color-surface); padding: 64px; text-align: center; }
.consult__box .kicker { color: var(--color-surface); opacity: .8; }
.consult__box h2 { font-size: clamp(28px, 3vw, 40px); line-height: 1.4; margin-top: 12px; }
.consult__box p { color: color-mix(in srgb, var(--color-surface) 80%, transparent); margin: 16px auto 28px; max-width: 620px; }
.consult__box .btn { background: var(--color-accent); color: var(--color-surface); }
.consult__box .btn:hover { background: var(--color-accent-hover); }
.consult__tel { color: var(--color-surface); display: block; font-family: var(--font-en); font-size: 28px; font-weight: 600; margin-top: 24px; }

.support-preview { background: var(--color-background); }
.support-preview__grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.support-preview__item { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card); padding: 24px; }
.support-preview__item h3 { color: var(--color-primary); font-size: 18px; }
.support-preview__item p { color: var(--color-muted); font-size: 14px; margin-top: 8px; }
.support-preview__item .text-link { margin-top: 16px; }

/* basic internal page framework for policy/profile/privacy */
.page-hero { background: var(--color-surface); padding: calc(var(--header-h) + 80px) 0 80px; }
.page-hero__title { color: var(--color-primary); font-size: clamp(40px, 4.2vw, 56px); line-height: 1.3; margin-top: 12px; max-width: 850px; }
.page-hero__lead { color: var(--color-muted); font-size: 17px; margin-top: 20px; max-width: 736px; }
.page-shell { padding-block: var(--space-8); }
.placeholder-note { background: var(--color-surface); border-left: 3px solid var(--color-accent); color: var(--color-muted); font-size: 14px; margin-top: 24px; padding: 16px 20px; }

/* Detail-page reading layout */
.prose { max-width: var(--reading); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { color: var(--color-primary); font-size: clamp(28px, 3vw, 38px); line-height: 1.4; margin-top: var(--space-6); }
.prose h3 { color: var(--color-primary); font-size: 22px; line-height: 1.5; margin-top: var(--space-5); }
.prose p, .prose li { color: var(--color-muted); }
.prose ul { list-style: disc; margin-left: 1.4em; }
.prose li + li { margin-top: 8px; }
.policy-detail__item { border-top: 1px solid var(--color-border); padding-top: var(--space-5); }
.policy-detail__item + .policy-detail__item { margin-top: var(--space-6); }
.policy-detail__num { color: var(--color-accent); font-family: var(--font-en); font-size: 13px; font-weight: 600; letter-spacing: .15em; }
.profile-detail { display: grid; gap: 64px; grid-template-columns: 300px minmax(0, 1fr); }
.profile-detail__image { aspect-ratio: 3 / 4; background: var(--color-background); border-radius: var(--radius-card); overflow: hidden; }
.profile-detail__image img { height: 100%; object-fit: cover; width: 100%; }
.profile-timeline { border-left: 1px solid var(--color-border); margin-top: var(--space-4); padding-left: 24px; }
.profile-timeline li { color: var(--color-muted); padding-bottom: 16px; position: relative; }
.profile-timeline li::before { background: var(--color-accent); border-radius: 50%; content: ""; height: 8px; left: -28px; position: absolute; top: 10px; width: 8px; }
.profile-timeline strong { color: var(--color-primary); display: inline-block; font-family: var(--font-en); margin-right: 12px; }
@media (max-width: 768px) { .profile-detail { gap: 32px; grid-template-columns: 1fr; } .profile-detail__image { max-width: 280px; } }

/* DECO-006: formal navy footer with grouped official information */
.ft { background: var(--color-primary); color: var(--color-surface); padding: 64px 0 28px; }
.ft__grid { display: grid; gap: 48px; grid-template-columns: 1.3fr repeat(3, 1fr); }
.ft__brand { font-size: 21px; font-weight: 700; }
.ft__brand .en { color: color-mix(in srgb, var(--color-surface) 70%, transparent); display: block; font-size: 10px; margin-top: 5px; }
.ft__role, .ft__address, .ft__tel { color: color-mix(in srgb, var(--color-surface) 80%, transparent); font-size: 13px; margin-top: 12px; }
.ft__tel { display: inline-block; font-family: var(--font-en); font-size: 18px; font-weight: 600; }
.ft__title { color: var(--color-surface); font-size: 13px; font-weight: 600; letter-spacing: .1em; }
.ft__links { margin-top: 14px; }
.ft__links li + li { margin-top: 8px; }
.ft__links a { color: color-mix(in srgb, var(--color-surface) 80%, transparent); font-size: 13px; }
.ft__links a:hover { color: var(--color-surface); text-decoration: underline; }
.ft__sns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.ft__sns a { align-items: center; border: 1px solid color-mix(in srgb, var(--color-surface) 45%, transparent); border-radius: 50%; color: var(--color-surface); display: flex; height: 40px; justify-content: center; width: 40px; }
.ft__sns svg { height: 18px; width: 18px; }
.ft__sns a:hover { background: color-mix(in srgb, var(--color-surface) 12%, transparent); }
.ft__bottom { border-top: 1px solid color-mix(in srgb, var(--color-surface) 22%, transparent); color: color-mix(in srgb, var(--color-surface) 65%, transparent); display: flex; font-size: 12px; justify-content: space-between; margin-top: 48px; padding-top: 20px; }

/* Nav drawer keeps content visible without motion requirements */
@media (prefers-reduced-motion: no-preference) {
  .fade { opacity: 0; transform: translateY(12px); transition: opacity .45s ease, transform .45s ease; }
  .fade.is-in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

@media (max-width: 1100px) {
  .inner, .reading { width: min(var(--content), calc(100% - 64px)); }
  .hd { padding-left: 32px; }
  .hd__nav ul { gap: 18px; margin-right: 20px; }
  .hero__copy { padding-left: 32px; }
  .policy-grid { grid-template-columns: repeat(3, 1fr); }
  .policy-card:nth-child(4), .policy-card:nth-child(5) { grid-column: span 1; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; --space-7: 80px; --space-8: 80px; }
  body { font-size: 15px; }
  .inner, .reading { width: calc(100% - 40px); }
  .section { padding-block: var(--space-7); }
  .section-head { margin-bottom: var(--space-4); }
  .section-lead { font-size: 15px; }
  .btn { font-size: 15px; min-height: 50px; padding-inline: 22px; }
  .hd { padding-left: 20px; }
  .hd__en { display: none; }
  .hd__nav, .hd__cta { display: none; }
  .hd__ham { align-items: stretch; background: transparent; border: 0; display: flex; flex-direction: column; gap: 6px; height: var(--header-h); justify-content: center; padding: 0 20px; width: 64px; }
  .hd__ham span { background: var(--color-primary); display: block; height: 2px; transition: transform .25s ease, opacity .25s ease; width: 100%; }
  .hd__ham[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .hd__ham[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .hd__ham[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  .drawer-ovl { background: color-mix(in srgb, var(--color-primary) 55%, transparent); inset: var(--header-h) 0 0; opacity: 0; position: fixed; transition: opacity .25s ease; z-index: 40; }
  .drawer-ovl.is-open { opacity: 1; }
  .drawer { background: var(--color-surface); border-left: 1px solid var(--color-border); bottom: 0; padding: 24px 20px; position: fixed; right: 0; top: var(--header-h); transform: translateX(100%); transition: transform .25s ease; width: min(84vw, 340px); z-index: 45; }
  .drawer.is-open { transform: translateX(0); }
  .drawer li { border-bottom: 1px solid var(--color-border); }
  .drawer li a { display: block; font-size: 16px; font-weight: 600; padding-block: 15px; }
  .drawer__cta { margin-top: 24px; width: 100%; }
  .hero__inner { display: flex; flex-direction: column; min-height: 0; }
  .hero__copy { margin-left: 0; order: 1; padding: 56px 20px 36px; width: auto; }
  .hero__visual { inset: auto; position: static; }
  .hero__title { font-size: clamp(38px, 10vw, 44px); }
  .hero__lead { font-size: 15px; }
  .hero__actions { align-items: stretch; flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .hero__visual { aspect-ratio: 4 / 3; order: 2; }
  .hero__visual img { object-position: 61% center; }
  .policy-grid { grid-template-columns: 1fr; }
  .policy-card { min-height: 0; padding: 24px 20px; }
  .theme-row { gap: 8px 12px; grid-template-columns: 1fr auto; }
  .theme-row__category { grid-column: 1; }
  .theme-row__year { grid-column: 2; grid-row: 1; }
  .theme-row__copy { grid-column: 1 / -1; }
  .reason__quote { font-size: 29px; }
  .profile-brief__grid { gap: 32px; grid-template-columns: 1fr; }
  .profile-brief__image { max-width: 280px; }
  .activity-preview__grid, .support-preview__grid { grid-template-columns: 1fr; }
  .activity-channel { align-items: flex-start; flex-direction: column; gap: 14px; }
  .activity-channel .text-link { margin-left: 0; }
  .consult { padding-block: 64px; }
  .consult__box { margin-inline: 20px; padding: 48px 20px; }
  .consult__box .btn { width: 100%; }
  .ft__grid { gap: 32px; grid-template-columns: 1fr; }
  .ft__bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}