@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&display=swap');

:root {
  --primary: #181d26;
  --primary-active: #0d1218;
  --ink: #181d26;
  --body: #333840;
  --muted: #41454d;
  --hairline: #dddddd;
  --canvas: #ffffff;
  --surface-soft: #f8fafc;
  --surface-strong: #e0e2e6;
  --surface-dark: #181d26;
  --coral: #aa2d00;
  --forest: #0a2e0e;
  --cream: #f5e9d4;
  --peach: #fcab79;
  --mint: #a8d8c4;
  --link: #1b61c9;
  --link-active: #1a3866;
  --on-primary: #ffffff;
  --on-dark: #ffffff;
}

body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: var(--body); background: var(--canvas); font-size: 14px; font-weight: 400; line-height: 1.25; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { padding: 0; list-style: none; }

/* NAV */
.sd-nav { background: var(--canvas); border-bottom: 1px solid var(--hairline); height: 64px; position: sticky; top: 0; z-index: 200; }
.sd-nav .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.sd-wordmark { font-size: 16px; font-weight: 500; color: var(--ink); }
.sd-wordmark:hover { text-decoration: none; }
.sd-nav-links { display: flex; align-items: center; gap: 0; }
.sd-nav-links a { font-size: 14px; font-weight: 400; color: var(--body); padding: 8px 12px; }
.sd-nav-links a:hover { color: var(--ink); text-decoration: none; }
.sd-nav-right { display: flex; align-items: center; gap: 8px; }
.sd-btn-primary { background: var(--primary); color: var(--on-primary); font-size: 16px; font-weight: 500; padding: 16px 24px; border-radius: 12px; display: inline-block; line-height: 1; }
.sd-btn-primary:hover { background: var(--primary-active); color: var(--on-primary); text-decoration: none; }
.sd-btn-secondary { background: var(--canvas); color: var(--ink); font-size: 16px; font-weight: 500; padding: 16px 24px; border-radius: 12px; border: 1px solid var(--hairline); display: inline-block; line-height: 1; }
.sd-btn-secondary:hover { background: var(--surface-soft); text-decoration: none; }
.sd-hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.sd-hamburger span { display: block; width: 22px; height: 2px; background: var(--ink); }
.sd-mobile-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); z-index: 199; padding: 16px; flex-direction: column; gap: 4px; }
.sd-mobile-menu.open { display: flex; }
.sd-mobile-menu a { font-size: 16px; color: var(--ink); padding: 12px; border-bottom: 1px solid var(--hairline); }

/* HERO */
.sd-hero { padding: 96px 0; }
.sd-hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.sd-hero h1 { font-size: clamp(32px, 5vw, 40px); font-weight: 400; line-height: 1.2; color: var(--ink); margin-bottom: 16px; }
.sd-hero-sub { font-size: 16px; color: var(--body); line-height: 1.5; max-width: 580px; margin-bottom: 32px; }
.sd-hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.sd-hero-img { width: 100%; height: auto; max-height: 420px; object-fit: cover; border-radius: 10px; border: 1px solid var(--hairline); }

/* SIGNATURE CARDS */
.sd-sig-coral { background: var(--coral); color: var(--on-primary); border-radius: 12px; padding: 48px; margin: 24px 0; }
.sd-sig-forest { background: var(--forest); color: var(--on-primary); border-radius: 12px; padding: 48px; margin: 24px 0; }
.sd-sig-dark { background: var(--surface-dark); color: var(--on-dark); border-radius: 12px; padding: 48px; margin: 24px 0; }
.sd-sig-cream { background: var(--cream); color: var(--ink); border-radius: 10px; padding: 24px; margin: 24px 0; }
.sd-sig-coral h2, .sd-sig-forest h2, .sd-sig-dark h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 400; line-height: 1.2; margin-bottom: 12px; }
.sd-sig-coral p, .sd-sig-forest p, .sd-sig-dark p { font-size: 16px; opacity: 0.85; line-height: 1.5; max-width: 600px; margin-bottom: 20px; }
.sd-sig-cream h3 { font-size: 20px; font-weight: 400; color: var(--ink); margin-bottom: 8px; }
.sd-sig-cream p { font-size: 14px; color: var(--body); line-height: 1.5; margin-bottom: 12px; }
.sd-btn-on-dark { background: var(--canvas); color: var(--ink); font-size: 16px; font-weight: 500; padding: 16px 24px; border-radius: 12px; display: inline-block; }
.sd-btn-on-dark:hover { background: var(--surface-soft); text-decoration: none; }

/* ARTICLE CARDS GRID */
.sd-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; margin: 32px 0; }
.sd-article-card { background: var(--canvas); border: 1px solid var(--hairline); border-radius: 10px; padding: 16px; }
.sd-article-card .cat-tag { font-size: 14px; font-weight: 500; letter-spacing: 0.16px; color: var(--muted); text-transform: uppercase; font-size: 12px; margin-bottom: 6px; }
.sd-article-card h3 { font-size: 18px; font-weight: 500; color: var(--ink); line-height: 1.4; margin-bottom: 8px; }
.sd-article-card p { font-size: 14px; color: var(--body); line-height: 1.4; margin-bottom: 12px; }
.sd-article-card a.read-link { font-size: 14px; color: var(--link); font-weight: 400; }

/* SECTION */
.sd-section { padding: 96px 0; }
.sd-section-soft { background: var(--surface-soft); padding: 96px 0; }
.sd-section-strong { background: var(--surface-strong); padding: 96px 0; }
.sd-section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 400; color: var(--ink); line-height: 1.2; margin-bottom: 16px; }
.sd-section-sub { font-size: 16px; color: var(--body); line-height: 1.5; max-width: 620px; margin-bottom: 40px; }

/* BREADCRUMB */
.sd-bc { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.sd-bc a { color: var(--link); }
.sd-bc span { color: var(--muted); }
.sd-bc-sep { color: var(--hairline); }

/* TOC */
.sd-toc { background: var(--surface-soft); border: 1px solid var(--hairline); border-radius: 10px; padding: 20px 24px; margin-bottom: 32px; }
.sd-toc-head { font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 10px; }
.sd-toc ol { list-style: decimal; padding-left: 18px; }
.sd-toc li { font-size: 14px; color: var(--body); margin-bottom: 4px; }
.sd-toc a { color: var(--link); }

/* ARTICLE PAGE */
.sd-article-header { margin-bottom: 40px; }
.sd-article-cat { font-size: 14px; font-weight: 500; letter-spacing: 0.16px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; font-size: 12px; }
.sd-article-header h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 400; color: var(--ink); line-height: 1.2; margin-bottom: 16px; }
.sd-article-header .lead { font-size: 16px; color: var(--body); line-height: 1.5; max-width: 720px; }
.sd-article-img { width: 100%; height: 380px; object-fit: cover; border-radius: 10px; margin: 24px 0; }
.sd-article-body h2 { font-size: 24px; font-weight: 400; color: var(--ink); margin: 40px 0 12px; }
.sd-article-body h3 { font-size: 18px; font-weight: 500; color: var(--ink); margin: 24px 0 10px; }
.sd-article-body p { font-size: 14px; color: var(--body); line-height: 1.7; margin-bottom: 16px; }
.sd-article-body ul, .sd-article-body ol { margin: 12px 0 16px 20px; }
.sd-article-body ul { list-style: disc; }
.sd-article-body ol { list-style: decimal; }
.sd-article-body li { font-size: 14px; color: var(--body); line-height: 1.7; margin-bottom: 6px; }
.sd-article-body a { color: var(--link); }

/* DISCLAIMER */
.sd-disclaimer { background: var(--cream); border-radius: 10px; padding: 16px 20px; margin: 20px 0; font-size: 13px; color: var(--body); line-height: 1.5; }

/* RELATED */
.sd-related { border-top: 1px solid var(--hairline); padding-top: 40px; margin-top: 56px; }
.sd-related h3 { font-size: 14px; font-weight: 500; letter-spacing: 0.16px; text-transform: uppercase; color: var(--muted); margin-bottom: 20px; font-size: 12px; }
.sd-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.sd-related-card { padding: 16px; border: 1px solid var(--hairline); border-radius: 10px; display: flex; flex-direction: column; gap: 4px; }
.sd-related-tag { font-size: 12px; font-weight: 500; text-transform: uppercase; color: var(--muted); }
.sd-related-title { font-size: 14px; font-weight: 400; color: var(--ink); }
.sd-related-title a { color: var(--ink); }
.sd-related-title a:hover { color: var(--link); }

/* FORMS */
.sd-form-group { margin-bottom: 20px; }
.sd-form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 6px; }
.sd-form-group input, .sd-form-group textarea { width: 100%; background: var(--canvas); color: var(--ink); font-size: 14px; font-family: inherit; padding: 12px 16px; border: 1px solid var(--hairline); border-radius: 6px; outline: none; height: 44px; }
.sd-form-group textarea { height: auto; min-height: 120px; resize: vertical; }
.sd-form-group input:focus, .sd-form-group textarea:focus { border-color: #458fff; }
.sd-submit-btn { background: var(--primary); color: var(--on-primary); font-size: 16px; font-weight: 500; padding: 16px 24px; border: none; border-radius: 12px; cursor: pointer; font-family: inherit; }
.sd-submit-btn:hover { background: var(--primary-active); }
.sd-form-msg { display: none; font-size: 14px; color: var(--body); padding: 12px 16px; border: 1px solid var(--hairline); border-radius: 8px; margin-top: 12px; background: var(--surface-soft); }

/* COOKIE BANNER */
.sd-cookie { display: none; position: fixed; bottom: 24px; left: 24px; right: 24px; max-width: 540px; background: var(--canvas); border: 1px solid var(--hairline); border-radius: 10px; padding: 20px 24px; z-index: 300; }
.sd-cookie p { font-size: 14px; color: var(--body); line-height: 1.5; margin-bottom: 14px; }
.sd-cookie-btns { display: flex; gap: 8px; }
.sd-cookie-acc { background: var(--primary); color: var(--on-primary); border: none; border-radius: 12px; padding: 14px 20px; font-size: 14px; font-weight: 500; cursor: pointer; font-family: inherit; }
.sd-cookie-rej { background: var(--canvas); color: var(--muted); border: 1px solid var(--hairline); border-radius: 12px; padding: 14px 20px; font-size: 14px; cursor: pointer; font-family: inherit; }

/* FOOTER */
.sd-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 32px; }
.sd-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.sd-footer-brand .wordmark { font-size: 16px; font-weight: 500; color: var(--ink); margin-bottom: 10px; }
.sd-footer-brand p { font-size: 14px; color: var(--muted); line-height: 1.5; max-width: 260px; }
.sd-footer-col-head { font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 12px; }
.sd-footer ul { display: flex; flex-direction: column; gap: 8px; }
.sd-footer ul li a { font-size: 14px; color: var(--muted); }
.sd-footer ul li a:hover { color: var(--ink); text-decoration: none; }
.sd-footer-bottom { border-top: 1px solid var(--hairline); padding-top: 20px; }
.sd-footer-disc { font-size: 13px; color: var(--muted); line-height: 1.5; margin-bottom: 12px; max-width: 880px; }
.sd-footer-legal { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--muted); }
.sd-footer-legal a { color: var(--muted); }
.sd-footer-legal a:hover { color: var(--ink); text-decoration: none; }

/* PAGE STATIC */
.sd-page-head { padding: 64px 0 40px; border-bottom: 1px solid var(--hairline); margin-bottom: 40px; }
.sd-page-head h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 400; color: var(--ink); }
.sd-page-content h2 { font-size: 20px; font-weight: 400; color: var(--ink); margin: 32px 0 12px; }
.sd-page-content p, .sd-page-content li { font-size: 14px; color: var(--body); line-height: 1.7; margin-bottom: 12px; }
.sd-page-content ul { padding-left: 18px; list-style: disc; }
.sd-page-content a { color: var(--link); }

/* RESPONSIVE */
@media (max-width: 991px) {
  .sd-hero-grid { grid-template-columns: 1fr; }
  .sd-nav-links, .sd-nav-right { display: none; }
  .sd-hamburger { display: flex; }
  .sd-footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .sd-section, .sd-section-soft, .sd-section-strong { padding: 64px 0; }
  .sd-hero { padding: 64px 0; }
  .sd-footer-grid { grid-template-columns: 1fr; }
  .sd-card-grid { grid-template-columns: 1fr; }
  .sd-sig-coral, .sd-sig-forest, .sd-sig-dark { padding: 32px 24px; }
}