/* =========================================================
   Radiant Healthtech 共通スタイル
   - ベース配色：オフホワイト＋グリーン＋オレンジ
   - 教育事業部サイトと異なる世界観（少しナチュラル＆ヘルスケア寄り）
   - アクセシビリティを意識したコントラスト
   ========================================================= */

/* ========== Reset / Base ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.7;
    color: #1f2933;
    background-color: #fdfaf6;
}

/* 関係者向けページ：パスワード認証前は非表示 */
body.page.stakeholders {
    visibility: hidden;
}

/* 認証に成功したら表示に切り替え */
body.page.stakeholders.stakeholders--unlocked {
    visibility: visible;
}

/* 選択文字色 */
::selection {
    background-color: #0f766e;
    color: #ffffff;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: #0f766e;
    text-decoration: none;
}

a:hover,
a:focus-visible {
    text-decoration: underline;
}

button {
    font-family: inherit;
}

/* ========== カラートークン ========== */
:root {
    --color-bg: #fdfaf6;
    --color-bg-alt: #f4f2ec;
    --color-bg-accent: #0f766e;
    --color-bg-accent-soft: #ecfdf5;
    --color-text-main: #1f2933;
    --color-text-sub: #6b7280;
    --color-primary: #f97316;
    --color-primary-dark: #ea580c;
    --color-secondary: #0f766e;
    --color-border: #e5e7eb;
    --shadow-soft: 0 12px 30px rgba(15, 118, 110, 0.12);
    --radius-base: 12px;
    --radius-pill: 999px;
    --layout-width: 1100px;
}

/* ========== レイアウト共通 ========== */
.container {
    max-width: var(--layout-width);
    padding: 0 16px;
    margin: 0 auto;
}

.site-main {
    padding-bottom: 48px;
}

.section {
    padding: 56px 0;
}

.section--light {
    background-color: var(--color-bg-alt);
}

.section--accent {
    background: radial-gradient(circle at top left, #f97316 0, #0f766e 55%, #064e3b 100%);
    color: #f9fafb;
}

.section--center {
    text-align: center;
}

.section--narrow .container {
    max-width: 800px;
}

/* ========== タイポグラフィ ========== */
.section-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin: 0 0 0.75rem;
}

.section-title--light {
    color: #f9fafb;
}

.section-subtitle {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-sub);
}

.section-subtitle--light {
    color: #e5e7eb;
}

.section-header {
    margin-bottom: 32px;
}

.section-header--row {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-end;
}

/* ビジョン用強調テキスト */
.vision-tagline {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 4px 0 8px;
    color: var(--color-secondary);
}


/* ========== ボタン ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.1s ease;
}

.btn--primary {
    background: linear-gradient(90deg, var(--color-primary) 0, var(--color-primary-dark) 100%);
    color: #ffffff;
    box-shadow: var(--shadow-soft);
}

.btn--primary:hover,
.btn--primary:focus-visible {
    text-decoration: none;
    box-shadow: 0 16px 40px rgba(249, 115, 22, 0.35);
    transform: translateY(-1px);
}

.btn--secondary {
    background-color: #ffffff;
    color: var(--color-secondary);
    border-color: #d1fae5;
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
    background-color: #ecfdf5;
    text-decoration: none;
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-secondary);
    border-color: rgba(15, 118, 110, 0.35);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
    background-color: rgba(15, 118, 110, 0.08);
    text-decoration: none;
}

.btn--light {
    background-color: #f9fafb;
    color: #0f172a;
    border-color: transparent;
}

.btn--light:hover,
.btn--light:focus-visible {
    background-color: #e5e7eb;
}

.btn--sm {
    padding: 6px 14px;
    font-size: 0.85rem;
}

/* ========== スキップリンク ========== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 16px;
    padding: 8px 12px;
    background-color: #111827;
    color: #f9fafb;
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    z-index: 50;
}

.skip-link:focus {
    top: 12px;
}

/* ========== ヘッダー ========== */
.site-header {
    background-color: rgba(253, 250, 246, 0.95);
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 40;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #111827;
}

.logo {
    display: inline-block;
}

/* ヘッダー用タイトルイメージ */
.header-image {
    display: block;
    height: auto;
    max-width: 260px;
    /* 必要に応じて調整 */
}

.logo-mark {
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.15);
    object-fit: cover;
}

.logo-text {
    font-size: 1.1rem;
    letter-spacing: 0.03em;
}

.global-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 12px;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.92rem;
}

.nav-list a {
    padding: 6px 10px;
    border-radius: var(--radius-pill);
    color: #4b5563;
}

.nav-list a[aria-current="page"] {
    background-color: #ecfdf5;
    color: var(--color-secondary);
    font-weight: 700;
}

.nav-list a:hover,
.nav-list a:focus-visible {
    background-color: #f3f4f6;
    text-decoration: none;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* モバイルナビボタン */
.nav-toggle {
    display: none;
    border: none;
    background: transparent;
    padding: 4px;
    cursor: pointer;
}

.nav-toggle__bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: #111827;
    border-radius: 999px;

    +.nav-toggle__bar {
        margin-top: 5px;
    }
}

/* ========== ヒーロー ========== */
.hero {
    padding: 64px 0 40px;
    background: radial-gradient(circle at top right, #f97316 0, #fdfaf6 50%, #ecfdf5 100%);
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
}

.hero-tagline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    background-color: rgba(15, 118, 110, 0.08);
    border-radius: var(--radius-pill);
    padding: 4px 12px;
    color: #065f46;
    margin: 0 0 12px;
}

.hero-title {
    margin: 0 0 12px;
    font-size: 2.1rem;
    line-height: 1.25;
    letter-spacing: 0.03em;
}

.hero-highlight {
    color: var(--color-primary-dark);
}

.hero-lead {
    margin: 0 0 16px;
    color: var(--color-text-sub);
    font-size: 0.98rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
}

.hero-note {
    font-size: 0.85rem;
    color: #4b5563;
}

.hero-visual {
    border-radius: 32px;
    background: linear-gradient(135deg, #ecfdf5 0, #f97316 35%, #0f766e 100%);
    padding: 6px;
    box-shadow: var(--shadow-soft);
}

.hero-image {
    border-radius: 24px;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========== ページヒーロー ========== */
.page-hero {
    padding: 40px 0 24px;
}

.page-eyebrow {
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #9ca3af;
    margin: 0 0 6px;
}

.page-title {
    margin: 0 0 10px;
    font-size: 1.8rem;
    font-weight: 800;
}

.page-lead {
    margin: 0;
    font-size: 0.98rem;
    color: var(--color-text-sub);
}

/* ========== グリッド / カード ========== */
.grid {
    display: grid;
    gap: 24px;
}

.grid--3col {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
    background-color: #ffffff;
    border-radius: var(--radius-base);
    padding: 16px 16px 18px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.card-image {
    border-radius: 12px;
    margin-bottom: 12px;
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card-title {
    margin: 0 0 6px;
    font-size: 1.1rem;
    font-weight: 700;
}

.card-text {
    margin: 0 0 8px;
    font-size: 0.95rem;
    color: var(--color-text-sub);
}

.card-link {
    font-size: 0.9rem;
    font-weight: 600;
}

/* メンバーカード */
.member-card {
    text-align: left;
}

.member-photo {
    border-radius: 999px;
    width: 110px;
    height: 110px;
    object-fit: cover;
    margin-bottom: 8px;
}

.member-role {
    margin: 0 0 2px;
    font-size: 0.9rem;
    color: var(--color-secondary);
}

.member-univ {
    margin: 0 0 6px;
    font-size: 0.9rem;
    color: var(--color-text-sub);
}

.member-snippet {
    margin: 0 0 10px;
    font-size: 0.9rem;
    color: #4b5563;
}

/* ========== 2カラムレイアウト ========== */
.two-column {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: flex-start;
}

.two-column--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
}

/* 箱要素 */
.box {
    border-radius: var(--radius-base);
    padding: 16px 18px;
    background-color: #ecfdf5;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.box-title {
    margin: 0 0 8px;
    font-size: 1rem;
    font-weight: 700;
}

.box-foot {
    margin: 12px 0 0;
    font-size: 0.9rem;
}

/* ========== リスト系 ========== */
.check-list {
    list-style: none;
    padding: 0;
    margin: 8px 0 0;
    font-size: 0.95rem;
}

.check-list li {
    position: relative;
    padding-left: 1.3em;
    margin-bottom: 4px;
}

.check-list li::before {
    content: "✔";
    position: absolute;
    left: 0;
    top: 0.1em;
    font-size: 0.8rem;
    color: var(--color-secondary);
}

/* ステップリスト */
.step-list {
    margin: 0;
    padding-left: 1.1em;
    font-size: 0.95rem;
}

.step-list li {
    margin-bottom: 12px;
}

/* ========== タイムライン ========== */
.timeline {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    border-left: 2px solid rgba(148, 163, 184, 0.7);
}

.timeline-item {
    position: relative;
    padding-left: 24px;
    margin-bottom: 24px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -7px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background-color: var(--color-primary);
}

.timeline-year {
    font-weight: 700;
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 4px;
}

.timeline-title {
    margin: 0 0 6px;
    font-size: 1rem;
    font-weight: 700;
}

.timeline-image {
    width: 100%;
    max-width: 260px;
    border-radius: 10px;
    margin-bottom: 8px;
}

/* ========== NEWS ========== */
.news-list {
    display: grid;
    gap: 24px;
}

.news-list--column {
    grid-template-columns: minmax(0, 1fr);
}

.news-item {
    padding: 16px 0;
    border-bottom: 1px solid rgba(209, 213, 219, 0.9);
}

.news-item--detail {
    border-radius: var(--radius-base);
    border: 1px solid rgba(209, 213, 219, 0.85);
    padding: 16px 16px 18px;
    background-color: #ffffff;
}

.news-header {
    margin-bottom: 6px;
}

.news-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    font-size: 0.8rem;
    color: #6b7280;
}

.news-tag {
    display: inline-flex;
    align-items: center;
    border-radius: var(--radius-pill);
    padding: 3px 10px;
    background-color: #ffedd5;
    color: #9a3412;
    font-weight: 600;
}

.news-title {
    margin: 4px 0 0;
    font-size: 1.05rem;
    font-weight: 700;
}

.news-summary {
    margin: 6px 0 0;
    font-size: 0.92rem;
    color: var(--color-text-sub);
}

.news-image {
    margin-top: 12px;
    border-radius: 10px;
    max-height: 220px;
    object-fit: cover;
}

.news-body {
    margin-top: 10px;
    font-size: 0.95rem;
}

/* ========== FAQ & フォーム ========== */
.faq-category {
    margin-bottom: 32px;
}

.faq-category-title {
    margin: 0 0 10px;
    font-size: 1.05rem;
}

.faq-item {
    border-radius: 10px;
    border: 1px solid rgba(209, 213, 219, 0.9);
    padding: 8px 12px;
    margin-bottom: 10px;
    background-color: #ffffff;
}

.faq-summary {
    list-style: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
}

.faq-summary::-webkit-details-marker {
    display: none;
}

.faq-summary::before {
    content: "＋";
    margin-right: 6px;
    color: #6b7280;
    font-weight: 700;
}

details[open] .faq-summary::before {
    content: "－";
}

.faq-body {
    margin-top: 8px;
    font-size: 0.92rem;
    color: #4b5563;
}

.notice-list {
    font-size: 0.9rem;
    color: #4b5563;
    padding-left: 1.1em;
}

.contact-form {
    margin-top: 16px;
    padding: 16px 16px 18px;
    border-radius: var(--radius-base);
    background-color: #ffffff;
    border: 1px solid rgba(209, 213, 219, 0.9);
}

.form-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
}

.form-field--full {
    grid-column: 1 / -1;
}

label span[aria-hidden="true"] {
    color: #dc2626;
    margin-left: 3px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    border-radius: 8px;
    border: 1px solid rgba(209, 213, 219, 0.9);
    padding: 8px 10px;
    font-size: 0.93rem;
    font-family: inherit;
    background-color: #f9fafb;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid rgba(59, 130, 246, 0.75);
    outline-offset: 2px;
}

textarea {
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
}

/* ========== フッター ========== */
.site-footer {
    border-top: 1px solid rgba(148, 163, 184, 0.4);
    background-color: #111827;
    color: #e5e7eb;
    padding: 24px 0 22px;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: flex-start;
    justify-content: space-between;
}

.footer-logo {
    font-weight: 800;
    font-size: 1.1rem;
}

.footer-copy {
    margin: 4px 0 0;
    font-size: 0.8rem;
    color: #9ca3af;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-column {
    min-width: 180px;
}

.footer-title {
    font-size: 0.9rem;
    margin: 0 0 6px;
    color: #e5e7eb;
}

.footer-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.86rem;
}

.footer-list li {
    margin-bottom: 3px;
}

.footer-list a {
    color: #d1d5db;
}

.footer-list a:hover,
.footer-list a:focus-visible {
    color: #f9fafb;
    text-decoration: underline;
}

/* ========== その他 ========== */
.small {
    font-size: 0.85rem;
    color: #6b7280;
}

.policy-body h2 {
    font-size: 1rem;
    margin-top: 18px;
    margin-bottom: 4px;
}

.policy-body p {
    margin-top: 4px;
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.policy-date {
    margin-top: 16px;
}

/* メンバー詳細 */
.page-hero--member .member-hero {
    display: flex;
    gap: 20px;
    align-items: center;
}

.member-photo-large {
    width: 140px;
    height: 140px;
    border-radius: 999px;
    object-fit: cover;
}

.back-link {
    display: inline-block;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

/* 団体情報テーブル（枠線付き） */
.outline-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
    font-size: 0.95rem;
}

.outline-table th,
.outline-table td {
    border: 1px solid var(--color-border);
    padding: 8px 10px;
    vertical-align: top;
}

.outline-table th {
    background-color: #f9fafb;
    text-align: left;
    white-space: nowrap;
    width: 30%;
}

/* Radiant Device 詳細セクション */
.device-videos {
    display: grid;
    gap: 24px;
    margin: 20px 0 28px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.device-video-title {
    margin: 0 0 4px;
    font-size: 1rem;
    font-weight: 700;
}

.video-frame {
    margin-top: 8px;
}

.video-frame video {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background-color: #000000;
}

/* 3つの機能カードの余白調整 */
.device-functions {
    margin-top: 8px;
}

@media (max-width: 960px) {
    .device-videos {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ========== レスポンシブ ========== */
@media (max-width: 960px) {
    .hero-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .two-column,
    .two-column--reverse {
        grid-template-columns: minmax(0, 1fr);
    }

    .grid--3col {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-header--row {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 720px) {
    .grid--3col {
        grid-template-columns: minmax(0, 1fr);
    }

    .header-inner {
        align-items: center;
    }

    .global-nav {
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 12px;
        padding: 10px 16px 14px;
        background-color: rgba(17, 24, 39, 0.98);
        color: #e5e7eb;
        transform: translateY(-16px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.18s ease;
    }

    .global-nav.open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-list a {
        color: #e5e7eb;
    }

    .nav-list a[aria-current="page"] {
        background-color: rgba(16, 185, 129, 0.24);
        color: #ecfeff;
    }

    .nav-cta {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .nav-toggle {
        display: block;
    }

    .hero {
        padding-top: 56px;
    }

    .form-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .page-hero--member .member-hero {
        flex-direction: column;
        align-items: flex-start;
    }
}