:root{--bg:#f5f6fa;--card:#fff;--soft:#f8f9fc;--accent:#f77062;--text:#222831;--muted:#626b78;--border:#e1e5eb;--shadow:0 14px 38px rgba(25,32,45,.07)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);font:16px/1.75 Arial,Helvetica,sans-serif}
a{color:#d95d51}a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.site-header{padding:18px 5%;border-bottom:1px solid var(--border);background:rgba(255,255,255,.88)}
.header-inner{max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{width:170px;max-width:58%;height:auto;object-fit:contain}
.nav{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.nav a,.back-link{color:var(--muted);text-decoration:none;font-size:14px}
.nav a:hover,.back-link:hover{color:var(--accent)}
main{width:100%;flex:1}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.hero{padding:58px 0 32px}
.eyebrow{display:inline-block;padding:5px 11px;border:1px solid rgba(247,112,98,.32);border-radius:999px;background:rgba(247,112,98,.08);color:#c95045;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}
h1{font-size:clamp(32px,5vw,50px);line-height:1.13;letter-spacing:-.035em;margin:16px 0}
.hero p{max-width:690px;color:var(--muted);font-size:17px}
.hero-strip{margin-top:28px;padding:18px 22px;border:1px solid var(--border);border-radius:14px;background:var(--card);display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
.hero-strip strong{font-size:15px}.hero-strip span{font-size:13px;color:var(--muted)}
.filters{display:flex;gap:9px;flex-wrap:wrap;margin:8px 0 28px}
.filter{border:1px solid var(--border);border-radius:999px;padding:7px 13px;background:#fff;color:var(--muted);font-size:13px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:28px 0 18px}
.section-head h2{font-size:23px;line-height:1.3}.section-head p{color:var(--muted);font-size:14px}
.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding-bottom:66px}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;min-width:0;transition:transform .2s,box-shadow .2s}
.article-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(25,32,45,.11)}
.card-art{min-height:150px;padding:23px;display:flex;align-items:flex-end;background:linear-gradient(135deg,#fff0ed,#f8f9fc);border-bottom:1px solid var(--border)}
.art-mark{width:56px;height:56px;border-radius:15px;background:#fff;border:1px solid rgba(247,112,98,.28);display:grid;place-items:center;color:#d95d51;font-size:24px;font-weight:700}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1}
.category{font-size:11px;letter-spacing:.08em;text-transform:uppercase;font-weight:700;color:#c95045}
.article-card h3{font-size:20px;line-height:1.35;margin:8px 0 10px;letter-spacing:-.015em}
.article-card h3 a{color:var(--text);text-decoration:none}.article-card h3 a:hover{color:#c95045}
.article-card p{font-size:14px;color:var(--muted);margin-bottom:18px}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}
.read-link{font-weight:700;text-decoration:none;color:#c95045}
.newsletter{margin:0 0 64px;padding:28px;border:1px solid var(--border);border-radius:16px;background:#fff;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.newsletter h2{font-size:22px;margin-bottom:5px}.newsletter p{color:var(--muted);font-size:14px;max-width:660px}
.cta{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 19px;border-radius:9px;background:var(--accent);color:#1f2329;text-decoration:none;font-weight:700;font-size:14px}
.cta:hover{background:#ff8a7e}
.site-footer{border-top:1px solid var(--border);padding:24px 18px;text-align:center;color:var(--muted);font-size:13px;background:#fff}
.site-footer p{margin:4px 0}.site-footer a{color:var(--text);text-decoration:none}.site-footer a:hover{color:var(--accent)}
/* Article pages */
.article-wrap{padding:42px 0 68px}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(220px,280px);gap:24px;align-items:start;justify-content:center}
.article-main,.sidebar{background:#fff;border:1px solid var(--border);border-radius:17px;box-shadow:var(--shadow)}
.article-main{padding:clamp(23px,4vw,44px)}
.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:20px}.breadcrumbs a{color:var(--muted);text-decoration:none}.breadcrumbs a:hover{color:var(--accent)}
.article-title{font-size:clamp(30px,4.2vw,43px);line-height:1.18;letter-spacing:-.03em;margin:13px 0}
.article-meta{color:var(--muted);font-size:13px;margin-bottom:25px}
.article-intro{font-size:18px;color:#4d5663;border-left:3px solid var(--accent);padding-left:17px;margin:20px 0 28px}
.article-content h2{font-size:25px;line-height:1.3;margin:34px 0 12px;scroll-margin-top:20px}
.article-content h3{font-size:19px;margin:23px 0 8px}
.article-content p{margin:0 0 15px;color:#4f5865}
.article-content ul,.article-content ol{padding-left:24px;margin:10px 0 20px;color:#4f5865}
.article-content li{margin:8px 0;padding-left:3px}
.article-content strong{color:var(--text)}
.article-content table{width:100%;border-collapse:collapse;margin:18px 0 24px;font-size:14px}
.article-content th,.article-content td{border:1px solid var(--border);padding:11px;text-align:left;vertical-align:top}
.article-content th{background:var(--soft);color:var(--text)}
.tip{margin:22px 0;padding:17px 19px;border-left:3px solid var(--accent);border-radius:7px;background:#fff5f3;color:#4f5865}
.article-toc{padding:21px}.article-toc h2,.sidebar-box h2{font-size:17px;margin-bottom:12px}
.article-toc ol{padding-left:19px}.article-toc li{margin:8px 0;font-size:14px}.article-toc a{color:var(--muted);text-decoration:none}.article-toc a:hover{color:var(--accent)}
.sidebar{padding:20px;position:sticky;top:20px}.sidebar-box+.sidebar-box{border-top:1px solid var(--border);padding-top:19px;margin-top:19px}
.sidebar p{font-size:14px;color:var(--muted);margin-bottom:12px}.related-links{list-style:none}.related-links li{margin:10px 0}.related-links a{font-size:14px;color:var(--text);text-decoration:none}.related-links a:hover{color:var(--accent)}
.article-cta{margin-top:34px;padding:23px;border:1px solid var(--border);border-radius:13px;background:var(--soft)}
.article-cta h2{font-size:22px;margin-bottom:8px}.article-cta p{color:var(--muted);margin-bottom:15px}
@media(max-width:850px){.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:1fr}.sidebar{position:static}.hero{padding-top:40px}}
@media(max-width:560px){.site-header{padding:15px 18px}.logo{width:135px}.nav{gap:12px}.nav a{font-size:12px}.container{width:calc(100% - 28px)}.article-grid{grid-template-columns:1fr;gap:14px}.hero{padding:38px 0 24px}.hero p{font-size:15px}.card-art{min-height:118px}.card-body{padding:19px}.article-wrap{padding:25px 0 45px}.article-title{font-size:31px}.article-content h2{font-size:22px}.newsletter{padding:22px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}


/* Theme switcher and dark theme */
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:38px;padding:7px 12px;border:1px solid var(--border);border-radius:999px;background:var(--card);color:var(--text);font:600 13px Arial,Helvetica,sans-serif;cursor:pointer;white-space:nowrap}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}
.theme-toggle:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
html[data-theme="dark"]{color-scheme:dark;--bg:#11151c;--card:#1a202b;--soft:#202938;--text:#edf1f7;--muted:#a8b2c1;--border:#303b4b;--shadow:0 14px 38px rgba(0,0,0,.22)}
html[data-theme="dark"] body{background:var(--bg);color:var(--text)}
html[data-theme="dark"] .site-header{background:rgba(26,32,43,.94)}
html[data-theme="dark"] .site-footer{background:#161c26}
html[data-theme="dark"] .filters .filter{background:var(--card);color:var(--muted);border-color:var(--border)}
html[data-theme="dark"] .card-art{background:linear-gradient(135deg,#34252b,#202938);border-color:var(--border)}
html[data-theme="dark"] .art-mark{background:#252d3a;color:#ff9387;border-color:#704b4b}
html[data-theme="dark"] .article-main,html[data-theme="dark"] .sidebar,html[data-theme="dark"] .hero-strip,html[data-theme="dark"] .article-card,html[data-theme="dark"] .newsletter{background:var(--card);border-color:var(--border)}
html[data-theme="dark"] .article-intro{color:#c2cbd8}
html[data-theme="dark"] .article-content p,html[data-theme="dark"] .article-content ul,html[data-theme="dark"] .article-content ol{color:#c0cad7}
html[data-theme="dark"] .article-content th{background:var(--soft);color:var(--text)}
html[data-theme="dark"] .article-content td{color:#c0cad7}
html[data-theme="dark"] .tip{background:#34272a;color:#e5c7c2}
html[data-theme="dark"] .article-cta{background:var(--soft);border-color:var(--border)}
html[data-theme="dark"] .article-cta p{color:var(--muted)}
html[data-theme="dark"] .cta{color:#241d1d}

/* System mode: follow the operating-system dark preference. */
@media (prefers-color-scheme: dark) {
html:not([data-theme="light"]):not([data-theme="dark"]){color-scheme:dark;--bg:#11151c;--card:#1a202b;--soft:#202938;--text:#edf1f7;--muted:#a8b2c1;--border:#303b4b;--shadow:0 14px 38px rgba(0,0,0,.22)}
html:not([data-theme="light"]):not([data-theme="dark"]) body{background:var(--bg);color:var(--text)}
html:not([data-theme="light"]):not([data-theme="dark"]) .site-header{background:rgba(26,32,43,.94)}
html:not([data-theme="light"]):not([data-theme="dark"]) .site-footer{background:#161c26}
html:not([data-theme="light"]):not([data-theme="dark"]) .filters .filter{background:var(--card);color:var(--muted);border-color:var(--border)}
html:not([data-theme="light"]):not([data-theme="dark"]) .card-art{background:linear-gradient(135deg,#34252b,#202938);border-color:var(--border)}
html:not([data-theme="light"]):not([data-theme="dark"]) .art-mark{background:#252d3a;color:#ff9387;border-color:#704b4b}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-main,html:not([data-theme="light"]):not([data-theme="dark"]) .sidebar,html:not([data-theme="light"]):not([data-theme="dark"]) .hero-strip,html:not([data-theme="light"]):not([data-theme="dark"]) .article-card,html:not([data-theme="light"]):not([data-theme="dark"]) .newsletter{background:var(--card);border-color:var(--border)}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-intro{color:#c2cbd8}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-content p,html:not([data-theme="light"]):not([data-theme="dark"]) .article-content ul,html:not([data-theme="light"]):not([data-theme="dark"]) .article-content ol{color:#c0cad7}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-content th{background:var(--soft);color:var(--text)}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-content td{color:#c0cad7}
html:not([data-theme="light"]):not([data-theme="dark"]) .tip{background:#34272a;color:#e5c7c2}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-cta{background:var(--soft);border-color:var(--border)}
html:not([data-theme="light"]):not([data-theme="dark"]) .article-cta p{color:var(--muted)}
html:not([data-theme="light"]):not([data-theme="dark"]) .cta{color:#241d1d}
}
@media(max-width:560px){.theme-toggle{min-height:34px;padding:6px 9px;font-size:12px}}