/* =========================================
   共通スタイルシート
   薫（かおる）サイト / AI・感性コンテンツ群
========================================= */

:root {
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Noto Sans JP', sans-serif;
    --color-text: #333;
    --color-heading: #111;
    --color-background: #fdfdfd;
    --color-accent: #508560;
    --color-accent-light: #e8f0ea;
    --color-subtle-bg: #f7f9f7;
    --color-border: #e0e0e0;
    --container-width: 860px;
    --container-narrow: 760px;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    padding: 0;
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-serif);
    font-size: 15px;
    line-height: 1.95;
    letter-spacing: .03em;
    -webkit-text-size-adjust: 100%;
    word-wrap: break-word;
    font-feature-settings: "palt";
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity .2s ease;
}
a:hover { opacity: .7; text-decoration: underline; }

p { margin: 0 0 1.3rem; }

/* ===== LAYOUT ===== */
#wrapper {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

main { display: block; }

/* ===== HEADER ===== */
header#header {
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.site-nav {
    font-family: var(--font-sans);
    font-size: .85rem;
    margin-bottom: 1.2rem;
    color: #888;
}
.site-nav a { color: var(--color-accent); }

.article-eyebrow {
    font-family: var(--font-sans);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .15em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: .5rem;
}

h1.article-title {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-heading);
    margin: 0 0 .8rem;
    letter-spacing: .03em;
}

.article-subtitle {
    font-family: var(--font-serif);
    font-size: .95rem;
    color: #666;
    margin: 0 0 .6rem;
}

.article-meta {
    font-family: var(--font-sans);
    font-size: .8rem;
    color: #aaa;
}

/* ===== HEADINGS ===== */
h2 {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-heading);
    margin: 2.5rem 0 1.2rem;
    line-height: 1.6;
}

h2.section-heading {
    font-size: 1.15rem;
    padding-left: .9rem;
    border-left: 4px solid var(--color-accent);
    margin: 0 0 1.3rem;
}

h3 {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-heading);
    margin: 1.8rem 0 .9rem;
}

/* ===== SECTION BLOCK ===== */
.section-block {
    margin: 2.8rem 0;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--color-border);
}
.section-block:last-of-type { border-bottom: none; }

/* ===== HIGHLIGHT ===== */
.hl {
    background: #ffe066;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 700;
}

/* ===== PULL QUOTE ===== */
.pull-quote {
    margin: 2rem 0;
    padding: 1.3rem 1.6rem;
    background: var(--color-subtle-bg);
    border-left: 5px solid var(--color-accent);
    border-radius: 0 8px 8px 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-heading);
    line-height: 1.85;
}

/* ===== EQUATION BLOCK ===== */
.equation-block {
    margin: 2rem 0;
    padding: 1.2rem 1.5rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: .93rem;
    color: var(--color-heading);
    font-weight: 500;
    text-align: center;
    letter-spacing: .06em;
}

/* ===== POINT CARDS ===== */
.point-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 1.5rem 0;
}

.point-card {
    background: #fff;
    border: 1px solid var(--color-border);
    padding: 1rem 1.1rem;
    border-radius: 8px;
    flex: 1;
    min-width: 200px;
    font-size: .9rem;
    line-height: 1.7;
}

.point-card strong {
    display: block;
    font-family: var(--font-sans);
    font-size: .88rem;
    margin-bottom: .4rem;
    color: var(--color-accent);
}

/* ===== DEFINITION / LITERATURE BOX ===== */
.definition-box,
.literature-box,
.info-box {
    background: #f7f9fb;
    border-left: 4px solid #4c8bf5;
    padding: 1.2rem 1.4rem;
    margin: 1.5rem 0;
    border-radius: 0 6px 6px 0;
    font-size: .93rem;
    line-height: 1.8;
}

/* ===== EXCERPT / BLOCKQUOTE ===== */
.excerpt,
blockquote.excerpt {
    background: var(--color-subtle-bg);
    border-left: 5px solid var(--color-accent);
    padding: 1.2rem 1.4rem;
    margin: 1.8rem 0;
    font-style: italic;
    font-size: .92rem;
}

/* ===== NAME CARD GRID ===== */
.name-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
}

.name-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 1.1rem 1.3rem;
}

.name-card .name-main {
    font-family: var(--font-sans);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: .3rem;
}

.name-card .name-reading {
    font-size: .82rem;
    color: #888;
    font-family: var(--font-sans);
    margin-bottom: .5rem;
}

.name-card p {
    font-size: .9rem;
    margin: 0;
    line-height: 1.75;
}

/* ===== FAQ ===== */
.faq-section {
    margin: 2.5rem 0;
    padding: 1.4rem 1.2rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: #fff;
}

.faq-item + .faq-item {
    margin-top: 1rem;
    border-top: 1px dashed var(--color-border);
    padding-top: 1rem;
}

.faq-q {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: .95rem;
    margin-bottom: .4rem;
    color: var(--color-heading);
}

.faq-a {
    font-size: .93rem;
    line-height: 1.85;
}

/* ===== STEP LIST ===== */
.step-list {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.step-list li {
    counter-increment: step;
    display: flex;
    gap: 1rem;
    margin-bottom: 1.4rem;
    align-items: flex-start;
}

.step-list li::before {
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    background: var(--color-accent);
    color: #fff;
    border-radius: 50%;
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: .88rem;
}

/* ===== CHAPTER LIST ===== */
ul.chapter-list {
    list-style: none;
    padding-left: 1.5rem;
    margin: 1rem 0 1.5rem;
}

ul.chapter-list li {
    margin-bottom: .7rem;
    position: relative;
    font-size: .95rem;
}

ul.chapter-list li::before {
    content: '・';
    color: var(--color-accent);
    position: absolute;
    left: -1.4rem;
    font-weight: bold;
}

/* ===== RELATED ARTICLES ===== */
.related-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.related-section h2 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 1.2rem;
    color: #666;
    letter-spacing: .08em;
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: .8rem;
}

.related-card {
    display: block;
    padding: .9rem 1.1rem;
    background: var(--color-subtle-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: .88rem;
    color: var(--color-text);
    text-decoration: none !important;
    transition: background .2s ease, border-color .2s ease;
}

.related-card:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent);
    opacity: 1;
    text-decoration: none !important;
}

.related-card .rc-category {
    font-size: .73rem;
    font-weight: 700;
    letter-spacing: .12em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: .2rem;
}

.related-card .rc-title {
    color: var(--color-heading);
    font-weight: 500;
    line-height: 1.5;
}

/* ===== BUTTON ===== */
.btn-primary {
    display: inline-block;
    padding: .65rem 1.4rem;
    background: var(--color-accent);
    color: #fff !important;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: .9rem;
    font-weight: 700;
    text-decoration: none !important;
    letter-spacing: .04em;
    transition: opacity .2s ease;
}
.btn-primary:hover { opacity: .8; }

/* ===== CLOSING BLOCK ===== */
.closing-block {
    margin-top: 3rem;
    padding: 1.8rem;
    background: var(--color-subtle-bg);
    border-radius: 12px;
    border: 1px solid #c8d8c8;
    text-align: center;
}

.closing-block p {
    font-size: .93rem;
    color: #555;
    margin-bottom: .6rem;
}

/* ===== PAGE TOC ===== */
.page-toc {
    margin: 2rem 0 2.5rem;
    padding: 1.2rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: var(--color-subtle-bg);
}

.page-toc h2 {
    margin-top: 0;
    text-align: center;
    font-size: 1rem;
}

.page-toc ul {
    list-style: none;
    padding-left: 0;
    margin: .5rem 0 0;
}

.page-toc li {
    margin-bottom: .4rem;
    font-size: .9rem;
}

/* ===== FOOTER ===== */
#footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

#footer address {
    font-style: normal;
    font-size: .82rem;
    color: #aaa;
    font-family: var(--font-sans);
}

/* ===== DESKTOP ===== */
@media (min-width: 720px) {
    body {
        font-size: 16px;
        line-height: 1.95;
        text-align: justify;
    }

    #wrapper {
        padding: 2.5rem 1.8rem 4rem;
    }

    h1.article-title {
        font-size: 1.75rem;
    }

    .related-grid {
        grid-template-columns: 1fr 1fr;
    }

    .name-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 960px) {
    .related-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}