/* =================================================================== SayNative design system — "Academic & trustworthy" Navy + teal, serif headings, calm institutional feel. Light theme is the default; dark theme re-maps the same tokens via prefers-color-scheme. Brand navy used AS A SURFACE (footer, logo tile) is a fixed literal so it stays navy in both themes. =================================================================== */ :root { color-scheme: light dark; /* Brand */ --lg-navy: #0f2a4a; --lg-navy-700: #163a63; --lg-navy-300: #9fb3cc; --lg-teal: #0d9488; --lg-teal-600: #0b7d73; --lg-teal-700: #095f57; --lg-teal-100: #d3ebe8; --lg-crimson: #9f1239; /* Surfaces & ink */ --lg-ink: #16202b; --lg-ink-soft: #475569; --lg-ink-faint: #64748b; /* AA on white for small text */ --lg-paper: #ffffff; --lg-surface: #f6f8fb; --lg-surface-2: #eef2f7; --lg-line: #dde4ec; --lg-header-bg: rgba(255,255,255,.88); /* Type */ --lg-serif: Georgia, 'Times New Roman', 'Iowan Old Style', serif; --lg-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; /* Shape */ --lg-radius: 14px; --lg-radius-s: 10px; --lg-shadow: 0 1px 2px rgba(15,42,74,.06), 0 8px 24px rgba(15,42,74,.06); --lg-shadow-lg:0 12px 40px rgba(15,42,74,.12); --lg-maxw: 1200px; } /* Dark theme: driven by the .dark class on (set by the pre-paint script in App.razor from the saved choice or the system preference), so the header toggle can override the OS setting. */ :root.dark { /* "Navy" ink flips light so headings/labels stay readable */ --lg-navy: #d9e4f4; --lg-navy-700: #c3d3ea; --lg-navy-300: #56708f; --lg-teal: #16a99c; --lg-teal-600: #3cc4b6; --lg-teal-700: #5ecfc3; --lg-teal-100: #10403b; --lg-crimson: #e56a8b; --lg-ink: #e4eaf3; --lg-ink-soft: #a8b5c6; --lg-ink-faint: #8494a8; --lg-paper: #151f2b; --lg-surface: #0e151e; --lg-surface-2: #1c2836; --lg-line: #2c3b4e; --lg-header-bg: rgba(14,21,30,.85); --lg-shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35); --lg-shadow-lg:0 12px 40px rgba(0,0,0,.5); } * { box-sizing: border-box; } html, body { margin: 0; padding: 0; font-family: var(--lg-sans); color: var(--lg-ink); background: var(--lg-surface); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; } h1, h2, h3, h4 { font-family: var(--lg-serif); color: var(--lg-navy); line-height: 1.2; letter-spacing: -.01em; font-weight: 700; } h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); margin: 0 0 .4em; } h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); margin: 0 0 .5em; } h3 { font-size: 1.2rem; margin: 0 0 .4em; } p { margin: 0 0 1em; } a { color: var(--lg-teal-600); text-decoration: none; } a:hover { text-decoration: underline; } :focus-visible { outline: 2px solid var(--lg-teal); outline-offset: 2px; } /* FocusOnNavigate moves focus to the h1 after route changes (for screen readers); a heading isn't interactive, so no visible ring. */ h1:focus, h1:focus-visible { outline: none; } .lg-container { max-width: var(--lg-maxw); margin: 0 auto; padding: 0 24px; } /* ── Lessons shell: sidebar course nav + content column ── */ .ln-shell { display: grid; grid-template-columns: 276px minmax(0, 1fr); gap: 48px; align-items: start; max-width: 1160px; margin: 0 auto; padding: 44px 24px 72px; } /* Clear the sticky 68px header: without the offset the sidebar's bottom hangs below the viewport and the last unit can never scroll into view. */ .ln-side { position: sticky; top: 84px; max-height: calc(100vh - 108px); overflow-y: auto; overscroll-behavior: contain; padding: 4px; scrollbar-width: thin; scrollbar-color: var(--lg-line) transparent; } @media (max-width: 940px) { .ln-shell { display: block; padding-top: 24px; } .ln-side { position: static; max-height: none; overflow: visible; padding: 0; margin-bottom: 28px; } } /* ── Buttons ───────────────────────────────────────────── */ .lg-btn { display: inline-flex; align-items: center; gap: .5em; font: 600 1rem/1 var(--lg-sans); padding: .85em 1.5em; border-radius: 999px; border: 1.5px solid transparent; cursor: pointer; transition: transform .12s ease, box-shadow .12s ease, background .12s ease; text-decoration: none; } .lg-btn:hover { text-decoration: none; transform: translateY(-1px); } /* Teal-600 base (not teal): white text needs it for 4.5:1 AA at button size. */ .lg-btn--primary { background: var(--lg-teal-600); color: #fff; box-shadow: 0 6px 18px rgba(13,148,136,.28); } .lg-btn--primary:hover { background: var(--lg-teal-700); color: #fff; } .lg-btn--ghost { background: transparent; color: var(--lg-navy); border-color: var(--lg-line); } .lg-btn--ghost:hover { border-color: var(--lg-navy-300); color: var(--lg-navy); background: var(--lg-paper); } .lg-btn--lg { font-size: 1.08rem; padding: 1em 1.9em; } .lg-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; } /* Dark ink on teal already clears AA; keep the original dark fills. */ :root.dark .lg-btn--primary { background: var(--lg-teal); color: #06231f; } :root.dark .lg-btn--primary:hover { background: var(--lg-teal-600); color: #06231f; } /* ── Header ────────────────────────────────────────────── */ .lg-header { position: sticky; top: 0; z-index: 50; background: var(--lg-header-bg); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--lg-line); } .lg-header__row { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; } /* Auto margin (not space-between) pins the nav + theme button to the right edge as a cluster; on mobile the nav is absolute and the theme button takes over the auto margin (see the 720px block). */ .lg-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; } .lg-nav__links { display: flex; align-items: center; gap: 28px; } .lg-nav a { color: var(--lg-ink-soft); font-weight: 500; font-size: .96rem; } .lg-nav a:hover { color: var(--lg-navy); text-decoration: none; } .lg-nav a.lg-btn--primary { color: #fff; } :root.dark .lg-nav a.lg-btn--primary { color: #06231f; } /* Theme toggle: moon shown in light mode (click → dark), sun in dark. */ .lg-theme-btn { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border: 1px solid var(--lg-line); border-radius: 999px; background: transparent; color: var(--lg-ink-soft); cursor: pointer; flex: 0 0 auto; transition: background .12s ease, color .12s ease, border-color .12s ease; } .lg-theme-btn:hover { background: var(--lg-paper); color: var(--lg-teal-600); border-color: var(--lg-navy-300); } .lg-theme-btn__sun { display: none; } :root.dark .lg-theme-btn__sun { display: block; } :root.dark .lg-theme-btn__moon { display: none; } /* Mobile menu: CSS-only (checkbox) so it works during static SSR too */ .lg-nav__toggle { position: absolute; opacity: 0; pointer-events: none; } .lg-nav__burger { display: none; } @media (max-width: 720px) { .lg-nav__burger { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 10px; cursor: pointer; border: 1px solid var(--lg-line); border-radius: 10px; background: var(--lg-paper); } .lg-nav__burger span { display: block; height: 2px; border-radius: 2px; background: var(--lg-navy); transition: transform .15s ease, opacity .15s ease; } .lg-nav__toggle:checked ~ .lg-nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); } .lg-nav__toggle:checked ~ .lg-nav__burger span:nth-child(2) { opacity: 0; } .lg-nav__toggle:checked ~ .lg-nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); } .lg-nav__toggle:focus-visible ~ .lg-nav__burger { outline: 2px solid var(--lg-teal); outline-offset: 2px; } .lg-nav { display: none; position: absolute; left: 0; right: 0; top: 68px; flex-direction: column; align-items: stretch; gap: 4px; background: var(--lg-paper); border-bottom: 1px solid var(--lg-line); padding: 12px 24px 18px; box-shadow: var(--lg-shadow-lg); } .lg-nav__toggle:checked ~ .lg-nav { display: flex; } .lg-nav__links { flex-direction: column; align-items: stretch; gap: 4px; } .lg-nav__links a { padding: 10px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--lg-surface-2); } .lg-nav a.lg-btn--primary { justify-content: center; margin-top: 10px; } /* The nav leaves the flow on mobile — the theme button carries the auto margin so it clusters with the burger on the right. */ .lg-theme-btn { margin-left: auto; width: 44px; height: 44px; border-radius: 10px; } } /* ── Logo ──────────────────────────────────────────────── */ .lg-logo { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; } .lg-logo:hover { text-decoration: none; } .lg-logo__mark { display: block; border-radius: 10px; box-shadow: 0 2px 8px rgba(15,42,74,.18); } .lg-logo__word { font-family: var(--lg-serif); font-weight: 700; font-size: 1.32rem; letter-spacing: -.015em; } .lg-logo__lingo { color: var(--lg-navy); } .lg-logo__graph { color: var(--lg-teal); } .lg-logo--compact .lg-logo__word { font-size: 1.1rem; } .lg-logo--ondark .lg-logo__lingo { color: #fff; } /* ── Footer ────────────────────────────────────────────── */ .lg-footer { background: #0f2a4a; color: #c8d4e4; margin-top: 64px; } .lg-footer__row { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; padding: 48px 0 28px; } .lg-footer a { color: #c8d4e4; } .lg-footer a:hover { color: #fff; } .lg-footer__col h4 { color: #fff; font-family: var(--lg-sans); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; margin: 0 0 12px; } .lg-footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: .92rem; } .lg-footer__brand { max-width: 300px; } .lg-footer__brand p { color: #9fb0c6; font-size: .9rem; margin-top: 12px; } .lg-footer__bar { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; font-size: .82rem; color: #8ea1ba; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; } /* ── Cards / surfaces ──────────────────────────────────── */ .lg-card { background: var(--lg-paper); border: 1px solid var(--lg-line); border-radius: var(--lg-radius); box-shadow: var(--lg-shadow); } /* ── Ad slots ──────────────────────────────────────────── */ .lg-ad { position: relative; display: flex; align-items: center; justify-content: center; background: repeating-linear-gradient(45deg, var(--lg-surface), var(--lg-surface) 10px, var(--lg-surface-2) 10px, var(--lg-surface-2) 20px); border: 1px dashed var(--lg-line); border-radius: var(--lg-radius-s); color: var(--lg-ink-faint); font-size: .8rem; overflow: hidden; } .lg-ad::before { content: "Advertisement"; position: absolute; top: 6px; left: 8px; font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--lg-ink-faint); } .lg-ad__inner { text-align: center; padding: 8px; } .lg-ad--rect { width: 300px; height: 250px; } .lg-ad--leader { width: 100%; max-width: 728px; height: 90px; margin: 0 auto; } .lg-ad--inline { width: 100%; height: 110px; margin: 20px 0; } @media (max-width: 980px) { .lg-ad--rect { width: 100%; } } /* ── Utility ───────────────────────────────────────────── */ .lg-eyebrow { display: inline-block; font: 700 .78rem/1 var(--lg-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--lg-teal-600); margin-bottom: 14px; } .lg-visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; } .lg-muted { color: var(--lg-ink-soft); } .lg-section { padding: 64px 0; } /* Prose pages (About, Privacy, Terms) */ .lg-prose { max-width: 760px; padding: 56px 24px; } .lg-prose__lead { font-size: 1.18rem; color: var(--lg-ink-soft); margin-bottom: 36px; } .lg-prose h2 { margin-top: 40px; } .lg-prose p, .lg-prose li { color: var(--lg-ink-soft); } .lg-prose ul { padding-left: 1.3em; margin: 0 0 1em; } .lg-prose__updated { font-size: .85rem; color: var(--lg-ink-faint); margin-bottom: 28px; } /* Styled error / 404 hero */ .lg-oops { text-align: center; padding: 96px 24px 72px; } .lg-oops__code { font: 700 5rem/1 var(--lg-serif); color: var(--lg-navy-300); letter-spacing: -.02em; margin-bottom: 8px; } .lg-oops p { color: var(--lg-ink-soft); max-width: 34em; margin: 0 auto 28px; } @media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; } } #blazor-error-ui { position: fixed; bottom: 0; left: 0; right: 0; background: #fff3cd; border-top: 1px solid #ffe69c; padding: 12px 20px; display: none; z-index: 1000; color: #533f03; } #blazor-error-ui .reload { color: #0b7d73; } #blazor-error-ui .dismiss { cursor: pointer; float: right; }