/* =========================================================
   シンプリ — メインCSS
   モバイルファースト / 純CSS / ビルド不要
   ========================================================= */

:root {
    --color-primary: #5B8DEE;
    --color-primary-dark: #3F6BC7;
    --color-primary-soft: #EAF1FF;
    --color-accent: #FDBB2D;
    --color-text: #1F2937;
    --color-text-soft: #4B5563;
    --color-text-mute: #6B7280;
    --color-bg: #FAFBFE;
    --color-bg-alt: #F3F5FB;
    --color-surface: #FFFFFF;
    --color-border: #E5E7EB;
    --color-shadow: rgba(31, 41, 55, 0.06);
    --color-shadow-strong: rgba(31, 41, 55, 0.12);
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-card: 0 2px 6px var(--color-shadow), 0 10px 24px rgba(91, 141, 238, 0.06);
    --shadow-card-hover: 0 4px 12px var(--color-shadow-strong), 0 16px 36px rgba(91, 141, 238, 0.12);
    --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
    --font-display: "M PLUS Rounded 1c", "Noto Sans JP", sans-serif;
    --container-max: 1120px;
    --container-narrow: 760px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.8;
    font-size: 16px;
    font-feature-settings: "palt";
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

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

a { color: var(--color-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 20px;
}
.container--narrow { max-width: var(--container-narrow); }

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: #fff;
    padding: 8px 16px;
    z-index: 999;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

.text-link { color: var(--color-primary-dark); }
.text-link:hover { text-decoration: underline; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 64px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
}
.brand:hover { text-decoration: none; }
.brand__mark { display: inline-flex; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-family: var(--font-display); font-weight: 900; font-size: 22px; letter-spacing: 0.02em; }
.brand__sub { font-size: 11px; color: var(--color-text-mute); margin-top: 2px; }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav__link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--color-text-soft);
    font-weight: 500;
    font-size: 14px;
    transition: background-color .15s ease;
}
.site-nav__link:hover { background: var(--color-bg-alt); text-decoration: none; }
.site-nav__link.is-active { background: var(--color-primary-soft); color: var(--color-primary-dark); }

@media (max-width: 480px) {
    .brand__sub { display: none; }
    .brand__name { font-size: 19px; }
    .site-nav__link { padding: 8px 10px; font-size: 13px; }
}

/* ===== Hero ===== */
.hero {
    padding: 56px 0 64px;
    background:
        radial-gradient(ellipse 80% 60% at 80% 20%, rgba(253, 187, 45, 0.18), transparent 60%),
        radial-gradient(ellipse 70% 50% at 10% 100%, rgba(91, 141, 238, 0.22), transparent 60%),
        linear-gradient(180deg, #F7FAFF, #FAFBFE);
    overflow: hidden;
}
.hero__inner { display: grid; gap: 32px; grid-template-columns: 1fr; align-items: center; }
@media (min-width: 880px) {
    .hero__inner { grid-template-columns: 1.1fr 0.9fr; gap: 48px; }
    .hero { padding: 80px 0 96px; }
}
.hero__eyebrow {
    display: inline-block;
    margin: 0 0 12px;
    padding: 6px 14px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary-dark);
}
.hero__title {
    font-family: var(--font-display);
    font-size: clamp(28px, 6vw, 48px);
    font-weight: 900;
    line-height: 1.35;
    margin: 0 0 16px;
    letter-spacing: 0.01em;
}
.hero__title rt { font-size: 0.4em; }
.hero__title-accent {
    background: linear-gradient(transparent 62%, #FFE99A 62%);
    padding: 0 4px;
}
.hero__lead {
    font-size: 15px;
    color: var(--color-text-soft);
    margin: 0 0 24px;
    line-height: 1.9;
}
@media (min-width: 640px) {
    .hero__lead { font-size: 17px; }
}

.hero__search {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-card);
}
.hero__search-label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-text-mute);
    margin-bottom: 8px;
}
.hero__search-row { display: flex; gap: 8px; }
.hero__search input[type="search"] {
    flex: 1;
    min-width: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 16px;
    font-family: inherit;
    background: var(--color-bg-alt);
}
.hero__search input[type="search"]:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(91, 141, 238, 0.18);
}

.hero__visual {
    position: relative;
    min-height: 280px;
    display: none;
}
@media (min-width: 880px) {
    .hero__visual { display: block; }
}
.hero__bubble {
    position: absolute;
    padding: 14px 20px;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow-card);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 15px;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    animation: float 6s ease-in-out infinite;
}
.hero__bubble::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 24px;
    width: 14px;
    height: 14px;
    background: #fff;
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    transform: rotate(45deg);
}
.hero__bubble--1 { top: 8%; left: 6%; animation-delay: 0s; }
.hero__bubble--2 { top: 32%; left: 48%; animation-delay: 1.5s; background: #FFF8E1; }
.hero__bubble--3 { top: 58%; left: 12%; animation-delay: 3s; background: #E8F0FE; }
.hero__bubble--4 { top: 78%; left: 50%; animation-delay: 4.5s; }
.hero__bubble--2::after, .hero__bubble--3::after { background: inherit; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero--compact {
    padding: 40px 0 32px;
    background: linear-gradient(135deg, var(--cat-color, var(--color-primary)) 0%, color-mix(in srgb, var(--cat-color, var(--color-primary)) 80%, white) 100%);
    color: #fff;
}
.hero--compact .hero__title--compact {
    font-size: clamp(24px, 5vw, 36px);
    color: #fff;
    margin: 12px 0 8px;
}
.hero--compact .hero__lead { color: rgba(255, 255, 255, 0.92); margin: 0; }
.breadcrumb--on-color, .breadcrumb--on-color a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb--on-color .breadcrumb__current { color: #fff; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-weight: 700;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: transform .1s ease, box-shadow .15s ease, background-color .15s ease;
    white-space: nowrap;
}
.btn--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(91, 141, 238, 0.35);
}
.btn--primary:hover { background: var(--color-primary-dark); text-decoration: none; transform: translateY(-1px); }
.btn--primary:active { transform: translateY(0); }

/* ===== Sections ===== */
.site-main { min-height: 60vh; }
.section { padding: 56px 0; }
.section--alt { background: var(--color-bg-alt); }
.section__title {
    font-family: var(--font-display);
    font-size: clamp(22px, 4vw, 30px);
    font-weight: 900;
    margin: 0 0 8px;
    letter-spacing: 0.01em;
}
.section__title::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 1.05em;
    background: var(--color-primary);
    border-radius: 3px;
    margin-right: 12px;
    vertical-align: -3px;
}
.section__lead { color: var(--color-text-soft); margin: 0 0 32px; font-size: 15px; }

@media (max-width: 640px) {
    .section { padding: 40px 0; }
}

/* ===== Category grid ===== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
@media (min-width: 640px) { .category-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; } }
@media (min-width: 960px) { .category-grid { grid-template-columns: repeat(6, 1fr); } }

.category-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 14px 18px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    transition: transform .15s ease, box-shadow .2s ease, border-color .15s ease;
    overflow: hidden;
}
.category-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--cat-color), color-mix(in srgb, var(--cat-color) 60%, white));
    opacity: 0;
    transition: opacity .2s ease;
    z-index: 0;
}
.category-card > * { position: relative; z-index: 1; }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); border-color: var(--cat-color); text-decoration: none; }
.category-card:hover::before { opacity: 0.06; }
.category-card__count {
    position: absolute;
    top: 10px;
    right: 12px;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-mute);
}
.category-card__icon {
    color: var(--cat-color);
    margin-bottom: 8px;
    display: inline-flex;
    padding: 12px;
    background: color-mix(in srgb, var(--cat-color) 12%, white);
    border-radius: 50%;
}
.category-card__name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 4px;
}
.category-card__desc { font-size: 11px; color: var(--color-text-mute); line-height: 1.5; }

@media (min-width: 640px) {
    .category-card__name { font-size: 15px; }
    .category-card__desc { font-size: 12px; }
}

/* ===== Article grid / card ===== */
.article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 560px) { .article-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (min-width: 960px) { .article-grid { grid-template-columns: repeat(3, 1fr); } }

.article-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    color: var(--color-text);
    transition: transform .15s ease, box-shadow .2s ease;
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); text-decoration: none; }
.article-card__thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--color-bg-alt);
    overflow: hidden;
}
.article-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-card__thumb-fallback {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--cat-color), color-mix(in srgb, var(--cat-color) 60%, white));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 56px;
}
.article-card__category {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(31, 41, 55, 0.78);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
}
.article-card__body { padding: 16px 18px 18px; flex: 1; display: flex; flex-direction: column; }
.article-card__title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 8px;
    line-height: 1.5;
    color: var(--color-text);
}
.article-card__desc {
    font-size: 13px;
    color: var(--color-text-soft);
    margin: 0 0 12px;
    line-height: 1.7;
    flex: 1;
}
.article-card__meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-text-mute);
    border-top: 1px dashed var(--color-border);
    padding-top: 10px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 12px;
    color: var(--color-text-mute);
    margin: 24px 0 16px;
}
.breadcrumb a { color: var(--color-text-mute); }
.breadcrumb a:hover { color: var(--color-primary-dark); }
.breadcrumb__current { color: var(--color-text); }

/* ===== Article (single) ===== */
.article__header { padding: 32px 0 24px; text-align: left; }
.article__category {
    display: inline-block;
    background: color-mix(in srgb, var(--cat-color) 14%, white);
    color: var(--cat-color);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 16px;
}
.article__title {
    font-family: var(--font-display);
    font-size: clamp(24px, 5vw, 38px);
    font-weight: 900;
    margin: 0 0 16px;
    line-height: 1.5;
    letter-spacing: 0.01em;
}
.article__lead {
    font-size: 16px;
    color: var(--color-text-soft);
    margin: 0 0 16px;
    line-height: 1.9;
    padding: 16px 18px;
    background: var(--color-primary-soft);
    border-radius: var(--radius);
    border-left: 4px solid var(--color-primary);
}
.article__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-mute);
}
.article__meta-dot { opacity: 0.5; }
.article__hero {
    margin: 0 0 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-alt);
    position: relative;
}
.article__hero img { width: 100%; height: auto; display: block; }
.article__hero-credit {
    position: absolute;
    right: 8px;
    bottom: 8px;
    background: rgba(31, 41, 55, 0.65);
    color: rgba(255, 255, 255, 0.92);
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
}
.article__hero-credit a { color: #fff; text-decoration: underline; text-underline-offset: 2px; }
.article__hero-credit a:hover { opacity: 0.85; }

.article__body { padding-bottom: 48px; }

.article__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
}
.tag {
    display: inline-block;
    background: var(--color-bg-alt);
    color: var(--color-text-soft);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}

/* ===== Prose (article body) ===== */
.prose { font-size: 16px; line-height: 1.95; color: var(--color-text); }
.prose > * + * { margin-top: 1.2em; }
.prose h2 {
    font-family: var(--font-display);
    font-size: clamp(20px, 4vw, 26px);
    font-weight: 900;
    margin: 2.2em 0 0.8em;
    padding: 12px 0 12px 18px;
    border-left: 6px solid var(--color-primary);
    background: linear-gradient(90deg, var(--color-primary-soft), transparent 70%);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    line-height: 1.5;
}
.prose h3 {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 700;
    margin: 1.8em 0 0.6em;
    color: var(--color-primary-dark);
    position: relative;
    padding-left: 16px;
}
.prose h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}
.prose h4 {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    margin: 1.4em 0 0.4em;
}
.prose p { margin: 1em 0; }
.prose strong { font-weight: 700; background: linear-gradient(transparent 62%, #FFE99A 62%); padding: 0 2px; }
.prose em { font-style: normal; color: var(--color-primary-dark); font-weight: 700; }
.prose a { color: var(--color-primary-dark); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1.5px; }

.prose ul, .prose ol { padding-left: 1.5em; margin: 1em 0; }
.prose ul li, .prose ol li { margin: 0.5em 0; }
.prose ul li::marker { color: var(--color-primary); }
.prose ol li::marker { color: var(--color-primary); font-weight: 700; }

.prose blockquote {
    margin: 1.5em 0;
    padding: 16px 20px;
    border-left: 4px solid var(--color-accent);
    background: #FFFCEF;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-soft);
}
.prose blockquote p { margin: 0.5em 0; }

.prose code {
    background: #F1F3F8;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.92em;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
.prose pre {
    background: #1F2937;
    color: #F3F4F6;
    padding: 18px 20px;
    border-radius: var(--radius);
    overflow-x: auto;
    line-height: 1.65;
    font-size: 14px;
}
.prose pre code { background: transparent; padding: 0; color: inherit; }

.prose hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 2.5em 0;
}

.prose img { border-radius: var(--radius); margin: 1.5em 0; }

/* Custom prose components (markdown will embed raw HTML for these) */
.prose .callout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    padding: 18px 20px;
    border-radius: var(--radius);
    margin: 1.8em 0;
    background: var(--color-primary-soft);
    border: 1px solid color-mix(in srgb, var(--color-primary) 25%, white);
}
.prose .callout__icon {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 18px;
}
.prose .callout--warn { background: #FFF7E1; border-color: #FFD980; }
.prose .callout--warn .callout__icon { background: #F59E0B; }
.prose .callout--danger { background: #FFEEEE; border-color: #FFB3B3; }
.prose .callout--danger .callout__icon { background: #EF4444; }
.prose .callout--success { background: #E9F9EE; border-color: #B5E5C2; }
.prose .callout--success .callout__icon { background: #22C55E; }
.prose .callout__title { font-family: var(--font-display); font-weight: 700; margin: 0 0 4px; font-size: 15px; }
.prose .callout__body { font-size: 14px; line-height: 1.8; color: var(--color-text-soft); }
.prose .callout__body p:first-child { margin-top: 0; }
.prose .callout__body p:last-child { margin-bottom: 0; }

.prose .summary-box {
    margin: 1.8em 0;
    padding: 22px 24px;
    background: linear-gradient(135deg, #FFFCEF, #FFF8E1);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--color-accent);
    position: relative;
}
.prose .summary-box::before {
    content: "つまり";
    position: absolute;
    top: -14px;
    left: 20px;
    background: var(--color-accent);
    color: #fff;
    padding: 4px 14px;
    border-radius: 999px;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 13px;
}
.prose .summary-box p { margin: 0.3em 0; font-size: 16px; font-weight: 500; }
.prose .summary-box strong { background: rgba(255, 235, 130, 0.5); }

.prose .compare {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin: 1.8em 0;
}
@media (min-width: 640px) { .prose .compare { grid-template-columns: 1fr 1fr; gap: 16px; } }
.prose .compare__item {
    padding: 18px 20px;
    border-radius: var(--radius);
    background: #fff;
    border: 2px solid var(--color-border);
}
.prose .compare__item--a { border-color: var(--color-primary); background: var(--color-primary-soft); }
.prose .compare__item--b { border-color: #FDBB2D; background: #FFFCEF; }
.prose .compare__label {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 8px;
    font-size: 13px;
}
.prose .compare__item--a .compare__label { background: var(--color-primary); color: #fff; }
.prose .compare__item--b .compare__label { background: var(--color-accent); color: #fff; }
.prose .compare__title { font-family: var(--font-display); font-weight: 700; font-size: 17px; margin: 0 0 8px; }
.prose .compare ul { margin: 0; padding-left: 1.2em; }
.prose .compare li { margin: 4px 0; font-size: 14px; }

.prose .steps {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 1.8em 0;
    display: grid;
    gap: 14px;
}
.prose .steps > li {
    counter-increment: step;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px 20px 18px 64px;
    position: relative;
    box-shadow: var(--shadow-card);
    margin: 0;
}
.prose .steps > li::before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 17px;
}

.prose .figure-box {
    margin: 1.8em 0;
    padding: 24px 20px;
    background: linear-gradient(135deg, #F7FAFF, #EAF1FF);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid color-mix(in srgb, var(--color-primary) 18%, white);
}
.prose .figure-box__caption {
    font-size: 13px;
    color: var(--color-text-mute);
    margin-top: 12px;
}

.prose table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.8em 0;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    font-size: 14px;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}
@media (min-width: 720px) { .prose table { display: table; white-space: normal; } }
.prose thead { background: var(--color-primary-soft); }
.prose th {
    padding: 12px 14px;
    text-align: left;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-primary-dark);
    border-bottom: 2px solid color-mix(in srgb, var(--color-primary) 30%, white);
    font-size: 13px;
}
.prose td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}
.prose tbody tr:last-child td { border-bottom: none; }
.prose tbody tr:nth-child(even) { background: var(--color-bg-alt); }

/* ===== Promise (about) ===== */
.promise-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin: 2em 0;
}
@media (min-width: 720px) { .promise-grid { grid-template-columns: repeat(3, 1fr); } }
.promise-card {
    background: #fff;
    padding: 24px 20px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    position: relative;
}
.promise-card__num {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 32px;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
    opacity: 0.7;
}
.promise-card__title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 8px;
}
.promise-card p { font-size: 14px; color: var(--color-text-soft); margin: 0; line-height: 1.8; }

/* ===== Empty state ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
}
.empty-state__title { font-family: var(--font-display); font-weight: 700; font-size: 18px; margin: 0 0 8px; }
.empty-state__text { color: var(--color-text-mute); margin: 0; font-size: 14px; }

/* ===== Footer ===== */
.site-footer {
    background: #1F2937;
    color: #D1D5DB;
    padding: 48px 0 24px;
    margin-top: 48px;
}
.site-footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
@media (min-width: 720px) { .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; } }
.site-footer__brand { font-family: var(--font-display); font-weight: 900; font-size: 20px; color: #fff; margin: 0 0 8px; }
.site-footer__tagline { color: #9CA3AF; font-size: 13px; margin: 0; line-height: 1.8; }
.site-footer__heading {
    font-family: var(--font-display);
    font-weight: 700;
    color: #fff;
    font-size: 14px;
    margin: 0 0 12px;
}
.site-footer__list { list-style: none; padding: 0; margin: 0; }
.site-footer__list li { margin: 6px 0; }
.site-footer__list a { color: #D1D5DB; font-size: 13px; }
.site-footer__list a:hover { color: #fff; }
.site-footer__copy {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
    color: #9CA3AF;
    font-size: 12px;
    margin: 0;
}

/* ===== Focus visible ===== */
:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* =========================================================
   Quiz
   ========================================================= */
.site-nav__link--accent {
    background: linear-gradient(135deg, #FFE99A, #FDBB2D);
    color: #92400E;
    font-weight: 700;
}
.site-nav__link--accent:hover { background: linear-gradient(135deg, #FDBB2D, #F59E0B); color: #fff; }

.hero--quiz {
    padding: 56px 0 64px;
    background:
        radial-gradient(ellipse 80% 60% at 80% 20%, rgba(253, 187, 45, 0.35), transparent 60%),
        radial-gradient(ellipse 70% 50% at 10% 100%, rgba(91, 141, 238, 0.4), transparent 60%),
        linear-gradient(135deg, #5B8DEE 0%, #3F6BC7 100%);
    color: #fff;
    overflow: hidden;
}
.hero__eyebrow--on-color { background: rgba(255, 255, 255, 0.18); color: #fff; border-color: rgba(255, 255, 255, 0.3); }
.hero__title--on-color { color: #fff; }
.hero__title-strike { background: linear-gradient(transparent 62%, #FDBB2D 62%); padding: 0 4px; color: #fff; }
.hero__lead--on-color { color: rgba(255, 255, 255, 0.92); }

.quiz-modes {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 32px;
}
@media (min-width: 760px) {
    .quiz-modes { grid-template-columns: 1fr 1fr; }
    .quiz-mode-card--all { grid-column: 1 / -1; }
}

.quiz-mode-card {
    display: block;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 24px;
    color: var(--color-text);
    transition: transform .15s ease, box-shadow .2s ease, border-color .15s ease;
    position: relative;
}
.quiz-mode-card:hover { text-decoration: none; }
a.quiz-mode-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); border-color: var(--color-primary); }

.quiz-mode-card--all {
    background: linear-gradient(135deg, #5B8DEE, #3F6BC7);
    color: #fff;
    border-color: transparent;
}
.quiz-mode-card--all .quiz-mode-card__desc { color: rgba(255, 255, 255, 0.9); }
.quiz-mode-card--all .quiz-mode-card__count { color: rgba(255, 255, 255, 0.85); }

.quiz-mode-card__icon {
    display: inline-block;
    font-size: 22px;
    background: rgba(255, 255, 255, 0.2);
    width: 44px; height: 44px;
    border-radius: 50%;
    text-align: center;
    line-height: 44px;
    margin-bottom: 8px;
}
.quiz-mode-card__title {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 900;
    margin: 0 0 6px;
}
.quiz-mode-card__desc {
    font-size: 13px;
    color: var(--color-text-soft);
    margin: 0 0 14px;
    line-height: 1.7;
}
.quiz-mode-card__count {
    font-size: 12px;
    color: var(--color-text-mute);
    font-weight: 700;
}
.quiz-mode-card__list { display: flex; flex-wrap: wrap; gap: 8px; }

.quiz-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text);
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.quiz-chip span { color: var(--color-text-mute); font-weight: 500; font-size: 11px; }
a.quiz-chip:hover {
    background: var(--cat-color, var(--color-primary));
    color: #fff;
    border-color: transparent;
    text-decoration: none;
}
a.quiz-chip:hover span { color: rgba(255, 255, 255, 0.85); }
.quiz-chip--disabled { opacity: 0.5; cursor: not-allowed; }
.quiz-chip--article {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-flex;
}

.quiz-options {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 24px;
}
.quiz-options__title {
    font-family: var(--font-display);
    font-weight: 700;
    margin: 0 0 12px;
    font-size: 15px;
}
.quiz-toggle {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    cursor: pointer;
}
.quiz-toggle input { margin-top: 4px; width: 18px; height: 18px; accent-color: var(--color-primary); }
.quiz-toggle__text { display: block; flex: 1; }
.quiz-toggle__text strong { font-weight: 700; display: block; font-size: 14px; margin-bottom: 4px; }
.quiz-toggle__text small { color: var(--color-text-mute); font-size: 12px; line-height: 1.7; display: block; }
.quiz-options__hint { margin: 12px 0 0; font-size: 12px; color: var(--color-text-mute); }
.text-link--bare { background: none; border: none; padding: 0; font: inherit; cursor: pointer; color: var(--color-primary-dark); text-decoration: underline; }

/* ===== Quiz Play ===== */
.quiz-play-section { padding: 32px 0 56px; }
.quiz-back-link {
    display: inline-block;
    color: var(--color-text-mute);
    font-size: 13px;
    margin-bottom: 16px;
}
.quiz-loading {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text-mute);
    font-size: 14px;
}
.quiz-empty {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius);
}
.quiz-empty p { margin: 0 0 20px; color: var(--color-text-soft); }

.quiz-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
}
.quiz-progress__bar {
    flex: 1;
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: 999px;
    overflow: hidden;
}
.quiz-progress__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 999px;
    transition: width .3s ease;
}
.quiz-progress__text {
    font-size: 12px;
    color: var(--color-text-mute);
    font-weight: 700;
    white-space: nowrap;
}

.quiz-question__card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    box-shadow: var(--shadow-card);
    margin-bottom: 16px;
}
.quiz-question__source {
    font-size: 11px;
    color: var(--color-text-mute);
    margin: 0 0 8px;
    font-weight: 700;
}
.quiz-question__text {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 700;
    margin: 0 0 20px;
    line-height: 1.7;
}
@media (min-width: 640px) {
    .quiz-question__text { font-size: 22px; }
    .quiz-question__card { padding: 32px; }
}

.quiz-choices {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}
.quiz-choice {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 14px 18px;
    background: #fff;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    font: inherit;
    text-align: left;
    color: var(--color-text);
    transition: border-color .12s ease, background-color .12s ease, transform .08s ease;
}
.quiz-choice:hover:not(:disabled) {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}
.quiz-choice:active:not(:disabled) { transform: scale(0.99); }
.quiz-choice:disabled { cursor: default; opacity: 0.85; }
.quiz-choice__mark {
    flex: 0 0 auto;
    width: 32px; height: 32px;
    background: var(--color-bg-alt);
    color: var(--color-text-mute);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 15px;
}
.quiz-choice__text { flex: 1; font-size: 15px; line-height: 1.6; }
.quiz-choice.is-correct {
    border-color: #22C55E;
    background: #E9F9EE;
}
.quiz-choice.is-correct .quiz-choice__mark { background: #22C55E; color: #fff; }
.quiz-choice.is-wrong {
    border-color: #EF4444;
    background: #FEE2E2;
}
.quiz-choice.is-wrong .quiz-choice__mark { background: #EF4444; color: #fff; }

.quiz-explanation {
    background: #FFFCEF;
    border: 1px solid #FFD980;
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    animation: slideUp .25s ease;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.quiz-explanation__head { margin-bottom: 10px; }
.quiz-result-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 999px;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 13px;
    color: #fff;
}
.quiz-result-tag--ok { background: #22C55E; }
.quiz-result-tag--ng { background: #EF4444; }
.quiz-explanation__body {
    color: var(--color-text-soft);
    font-size: 14px;
    line-height: 1.85;
    margin-bottom: 16px;
}
.quiz-next-btn { width: 100%; }
@media (min-width: 640px) {
    .quiz-next-btn { width: auto; min-width: 200px; }
}

/* ===== Quiz Result ===== */
.quiz-result {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
}
@media (min-width: 640px) {
    .quiz-result { padding: 48px 36px; }
}
.quiz-result__score { margin-bottom: 24px; }
.quiz-result__ring {
    --rate: 0;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: conic-gradient(var(--color-primary) calc(var(--rate) * 1%), var(--color-bg-alt) 0);
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: --rate 1s ease;
}
.quiz-result__ring::before {
    content: "";
    position: absolute;
    inset: 12px;
    background: #fff;
    border-radius: 50%;
}
.quiz-result__rate {
    position: relative;
    z-index: 1;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 36px;
    color: var(--color-text);
}
.quiz-result__count {
    margin: 0;
    font-size: 15px;
    color: var(--color-text-soft);
}
.quiz-result__count span { font-weight: 700; color: var(--color-text); }
.quiz-result__grade {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 64px;
    line-height: 1;
    margin-bottom: 12px;
}
.quiz-result__message {
    font-size: 15px;
    color: var(--color-text-soft);
    margin-bottom: 28px;
    line-height: 1.8;
}
.quiz-result__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 24px;
}
.btn--ghost {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
    padding: 10px 20px;
}
.btn--ghost:hover { background: var(--color-bg-alt); text-decoration: none; }

.quiz-result__review {
    text-align: left;
    margin-top: 32px;
    border-top: 1px dashed var(--color-border);
    padding-top: 24px;
}
.quiz-result__review-title {
    font-family: var(--font-display);
    font-size: 16px;
    margin: 0 0 16px;
}
.quiz-result__review-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.quiz-review-item {
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.quiz-review-item__q { font-weight: 700; margin: 0 0 10px; font-size: 14px; line-height: 1.6; }
.quiz-review-item__row { margin: 4px 0; font-size: 13px; display: flex; gap: 10px; align-items: baseline; }
.quiz-review-item__label {
    flex: 0 0 auto;
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
}
.quiz-review-item__label--wrong { background: #EF4444; }
.quiz-review-item__label--correct { background: #22C55E; }
.quiz-review-item__txt { flex: 1; color: var(--color-text-soft); }
.quiz-review-item__exp { margin: 8px 0 0; font-size: 12px; color: var(--color-text-mute); line-height: 1.7; }

/* =========================================================
   Reduce motion
   ========================================================= */
/* ===== Reduce motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}