/* 全画面共通：色、文字、ヘッダー、フォーム、ボタン、進捗表示 */
:root {
    color-scheme: light;
    --ink: #171717;
    --muted: #6b6b67;
    --paper: #f6f5f0;
    --card: #ffffff;
    --line: #deddd7;
    --accent: #232323;
    --font-body: "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
    --font-heading: "Shippori Mincho B1", Georgia, "Yu Mincho", serif;
    --font-ui: "Zen Kaku Gothic Antique", "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
    font-family: var(--font-body);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.75; }
a { color: inherit; }
button, input, select, textarea { font: inherit; font-family: var(--font-ui); }
nav, summary, label, legend, dialog dt, [role="tab"], .lesson-header-course, .primary-button, .secondary-button, .text-button, .member-menu-toggle, .member-menu-action, .status-pill, .breadcrumb, .course-progress-summary, .progress-percent { font-family: var(--font-ui); }
.site-header { position: relative; z-index: 20; min-height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 0 5vw; border-bottom: 1px solid var(--line); background: rgba(246,245,240,.96); }
.brand { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 600; letter-spacing: .14em; text-decoration: none; }
.member-header-context { display: flex; align-items: center; min-width: 0; gap: 20px; }
.lesson-header-course { min-width: 0; overflow: hidden; padding: 6px 12px; border: 1px solid #d2d1cb; background: transparent; color: #4f4f4a; font-size: .86rem; font-weight: 500; line-height: 1.4; text-decoration: none; text-overflow: ellipsis; white-space: nowrap; transition: background .15s ease, border-color .15s ease; }
.lesson-header-course:hover, .lesson-header-course:active { border-color: #b8b7b1; background: rgba(0,0,0,.025); }
.lesson-header-course:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.member-nav { display: flex; align-items: center; gap: 22px; font-size: .82rem; }
.member-nav-study-cards { text-decoration: none; white-space: nowrap; }
.member-nav-study-cards:hover, .member-nav-study-cards:focus-visible { text-decoration: underline; }
.member-account-menu { display: flex; align-items: center; }
.member-menu-toggle { display: inline-flex; align-items: center; gap: 8px; margin: 0; padding: 4px; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
.member-menu-toggle-text { display: none; font-size: .82rem; }
.member-menu-avatar { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; width: 36px; height: 36px; border-radius: 999px; background: #ecebe6; color: #5c5c58; }
.member-menu-chevron { display: inline-flex; transition: transform .15s ease; }
.member-account-menu.is-open .member-menu-chevron { transform: rotate(180deg); }
.member-menu-toggle:focus-visible, .member-menu-panel a:focus-visible, .member-menu-action:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.member-menu-panel { position: absolute; top: calc(100% + 6px); right: 5vw; z-index: 30; width: min(320px, calc(100vw - 24px)); max-width: calc(100vw - 24px); padding: 16px 18px 10px; overflow-x: hidden; background: var(--card); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 12px 32px rgba(28, 28, 26, .12); }
.member-menu-identity { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px; align-items: center; padding: 4px 2px 14px; border-bottom: 1px solid var(--line); }
.member-menu-identity .member-menu-avatar { width: 44px; height: 44px; }
.member-menu-identity-text { min-width: 0; }
.member-menu-name, .member-menu-email { margin: 0; overflow-wrap: anywhere; word-break: break-word; }
.member-menu-name { font-weight: 700; line-height: 1.4; }
.member-menu-email { color: var(--muted); font-size: .82rem; line-height: 1.45; }
.member-menu-list { margin: 8px 0 0; padding: 0; list-style: none; }
.member-menu-list a, .member-menu-action { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 44px; padding: 8px 4px; border: 0; background: transparent; color: inherit; font-size: .95rem; line-height: 1.4; text-align: left; text-decoration: none; cursor: pointer; }
.member-menu-list a:hover, .member-menu-action:hover { background: #f7f6f1; }
.member-menu-icon { display: inline-flex; flex: 0 0 auto; color: #3a3a36; }
.member-menu-item-sp { display: none; }
.member-menu-logout { margin: 4px 0 0; padding-top: 6px; border-top: 1px solid var(--line); }
.member-account { max-width: 560px; }
.member-account-panel { margin: 0 0 28px; padding: 20px 22px; background: var(--card); border: 1px solid var(--line); }
.member-account-panel p { margin: 0 0 12px; overflow-wrap: anywhere; word-break: break-word; }
.member-account-panel dt { margin: 0 0 4px; color: var(--muted); font-size: .82rem; font-weight: 700; }
.member-account-panel dd { margin: 0 0 16px; overflow-wrap: anywhere; word-break: break-word; }
.member-account-panel h2 { margin: 8px 0 8px; font-size: 1.25rem; }
.member-account-name-form { display: grid; gap: 10px; margin-top: 12px; }
.member-account-name-form input { width: 100%; }
.field-help { margin: 0 0 12px; color: var(--muted); font-size: .85rem; overflow-wrap: anywhere; }
.page-shell { width: min(1080px, 90vw); margin: 0 auto; padding: 14px 0 96px 32px; min-height: calc(100vh - 150px); }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); padding: 28px 5vw; font-size: .8rem; }
.eyebrow { margin: 0 0 10px; font: 700 .72rem/1.4 var(--font-ui); letter-spacing: .2em; color: var(--muted); }
h1, h2, h3 { font-family: var(--font-heading); line-height: 1.35; font-weight: 600; }
h1 { margin: 0 0 18px; font-size: clamp(1.8rem, 4vw, 3rem); }
h2 { font-size: 1.45rem; }
.lead { color: #4c4c48; font-size: 1.02rem; }
label { font-weight: 700; font-size: .9rem; }
input { width: 100%; border: 1px solid #aaa9a2; border-radius: 2px; background: #fff; padding: 14px 15px; }
select, textarea { width: 100%; border: 1px solid #aaa9a2; border-radius: 2px; background: #fff; padding: 14px 15px; }
input:focus, select:focus, textarea:focus { outline: 2px solid #222; outline-offset: 2px; }
.primary-button, .secondary-button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 12px 22px; border: 1px solid var(--accent); text-decoration: none; cursor: pointer; }
.primary-button { background: var(--accent); color: #fff; }
.secondary-button { background: transparent; color: var(--ink); }
.primary-button:hover, .primary-button:focus-visible, .primary-button:active { background: #444; }
.secondary-button:active { background: #f0efe9; }
.inline { width: fit-content; }
.text-button { border: 0; background: transparent; cursor: pointer; text-decoration: underline; }
.message, .dev-code { margin: 22px 0; padding: 12px 14px; background: #f0efe9; border-left: 3px solid #555; }
.message.error { background: #fff0ee; border-left-color: #9f2d1f; }
.dev-code { border: 1px dashed #999; background: #fff; }
.fine-print, .back-link { display: block; margin-top: 22px; color: var(--muted); font-size: .85rem; }
.page-heading { max-width: 760px; margin-bottom: 44px; }
.page-heading h1 { margin-bottom: 12px; }
.course-progress { display: grid; grid-template-columns: 1fr auto; gap: 7px 12px; margin: 22px 0; }
.course-progress-summary { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; font-size: .82rem; }
.course-progress-summary span { color: var(--muted); }
.course-progress-label { white-space: nowrap; }
.progress-track { align-self: center; height: 10px; overflow: hidden; background: #e2e1db; border-radius: 999px; }
.progress-track span { display: block; height: 100%; min-width: 0; background: #4d7658; border-radius: inherit; transition: width .2s ease; }
.progress-percent { min-width: 42px; font-weight: 700; font-size: .82rem; text-align: right; }
.status-pill { display: inline-block; padding: 3px 8px; background: #ecebe6; border-radius: 999px; font-size: .72rem; }
.empty-state { color: var(--muted); }
button:disabled { opacity: .5; cursor: not-allowed; }

@media (max-width: 640px) {
    .member-view .page-shell { padding-left: 0; }
    .site-header { min-height: 62px; }
    .member-view .site-header { min-height: 54px; align-items: center; flex-direction: row; justify-content: space-between; gap: 8px; padding: 9px 12px; }
    .member-view .member-header-context { flex: 1 1 auto; gap: 8px; }
    .member-view .brand { flex: 0 0 auto; font-size: .82rem; letter-spacing: .1em; white-space: nowrap; }
    .member-view .lesson-header-course { padding: 5px 8px; font-size: .72rem; white-space: nowrap; }
    .member-view .member-nav { flex: 0 0 auto; gap: 12px; font-size: .74rem; }
    .member-nav-study-cards { display: none; }
    .member-menu-toggle-text { display: inline; }
    .member-menu-item-sp { display: list-item; }
    .member-menu-panel { left: 12px; right: 12px; width: auto; max-width: none; }
    .member-account-name-form .primary-button { width: 100%; }
}

@media (max-width: 375px) {
    .member-view .site-header { gap: 6px; padding-right: 9px; padding-left: 9px; }
    .member-view .member-header-context { gap: 6px; }
    .member-view .brand { font-size: .76rem; letter-spacing: .06em; }
    .member-view .lesson-header-course { padding: 4px 6px; font-size: .68rem; }
    .member-view .member-nav { gap: 9px; font-size: .7rem; }
    .member-menu-panel { left: 9px; right: 9px; }
}