/* ===== 2FACO — Design System (v4) ===== */
/* Fonts loaded via HTML for non-blocking performance */
/* Inter + JetBrains Mono — consistent site-wide */
:root {
--bg: #0a0a0a;
--surface: #111;
--surface2: #1a1a1a;
--border: rgba(255,255,255,0.08);
--text: #e8e8e8;
--text-soft: #ccc;
--muted: #8a8a8a; /* bumped from #777 for WCAG AA contrast on dark bg */
--accent: #4ade80;
--accent-dim: rgba(74,222,128,0.08);
--accent-glow: rgba(74,222,128,0.18);
--danger: #f87171;
--success: #4ade80;
--radius: 8px;
--radius-lg: 12px;
--header-h: 56px;
--font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
--warning: #f59e0b;
--info: #38bdf8;
--font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}
/* Light mode — target so the inline script works flash-free */
html[data-theme="light"] {
--bg: #f8f8f7;
--surface: #fff;
--surface2: #f0f0ef;
--border: rgba(0,0,0,0.09);
--text: #1a1a1a;
--text-soft: #333;
--muted: #555; /* bumped for WCAG AA contrast on light bg */
--accent: #16a34a;
--accent-dim: rgba(22,163,74,0.07);
--accent-glow: rgba(22,163,74,0.18);
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
font-family: var(--font);
font-size: 14px;
background: var(--bg);
color: var(--text);
line-height: 1.65;
transition: background 0.25s, color 0.25s;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
/* ── HEADER ─────────────────────────────────── */
/* Scoped to body > header so article is unaffected */
body > header {
position: fixed;
top: 0;
width: 100%;
height: var(--header-h);
display: flex;
justify-content: space-between;
align-items: center;
padding: 0 32px;
background: rgba(10,10,10,0.92);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border-bottom: 1px solid var(--border);
z-index: 1000;
}
html[data-theme="light"] body > header {
background: rgba(248,248,247,0.94);
}
/* Article header — reset any inherited positioning */
.article-header {
/* Fully cancel any inherited header{} rules — works with both
body > header and bare header selectors in the CSS cascade */
position: static !important;
width: auto !important;
height: auto !important;
background: none !important;
border: none !important;
padding: 0 !important;
backdrop-filter: none !important;
-webkit-backdrop-filter: none !important;
z-index: auto !important;
display: block !important;
top: auto !important;
left: auto !important;
right: auto !important;
transform: none !important;
flex-direction: unset !important;
justify-content: unset !important;
align-items: unset !important;
gap: unset !important;
overflow: visible !important;
}
.logo {
font-family: var(--font-mono);
font-weight: 600;
font-size: 14px;
color: var(--accent);
text-decoration: none;
letter-spacing: -0.3px;
}
.logo span { color: var(--muted); }
nav {
display: flex;
align-items: center;
gap: 24px;
}
nav a {
text-decoration: none;
color: var(--muted);
font-size: 13px;
font-weight: 500;
transition: color 0.15s;
}
nav a:hover, nav a.active { color: var(--text); }
.theme-toggle {
background: var(--surface2);
border: 1px solid var(--border);
border-radius: 6px;
width: 30px;
height: 30px;
display: flex;
align-items: center;
justify-content: center;
cursor: pointer;
font-size: 13px;
transition: border-color 0.15s;
flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent); }
/* ── LAYOUT ──────────────────────────────────── */
.container {
max-width: 1080px;
margin: 0 auto;
padding: 0 20px;
}
.container--narrow {
max-width: 740px;
margin: 0 auto;
padding: 0 20px;
}
.page-body {
padding-top: calc(var(--header-h) + 48px);
padding-bottom: 80px;
}
/* ── ARTICLE HEADER ──────────────────────────── */
/* Note: position/layout reset is handled in the HEADER section above */
.article-header {
margin-bottom: 36px;
}
.article-header .tag {
display: inline-block;
font-family: var(--font-mono);
font-size: 10px;
font-weight: 600;
letter-spacing: 0.5px;
text-transform: uppercase;
color: var(--accent);
background: var(--accent-dim);
border: 1px solid var(--accent-glow);
padding: 3px 8px;
border-radius: 4px;
margin-bottom: 14px;
}
.article-header h1 {
font-size: clamp(26px, 3.5vw, 38px);
font-weight: 700;
line-height: 1.2;
letter-spacing: -0.5px;
margin-bottom: 14px;
}
.article-meta {
display: flex;
align-items: center;
gap: 12px;
font-family: var(--font-mono);
font-size: 11px;
color: var(--muted);
flex-wrap: wrap;
}
.article-meta .separator { opacity: 0.3; }
/* ── ARTICLE CONTENT ─────────────────────────── */
.article-content h2 {
font-size: 18px;
font-weight: 600;
margin-top: 36px;
margin-bottom: 10px;
letter-spacing: -0.3px;
padding-top: 20px;
border-top: 1px solid var(--border);
}
.article-content h3 {
font-size: 15px;
font-weight: 600;
margin-top: 22px;
margin-bottom: 8px;
}
.article-content p {
color: var(--text-soft);
margin-bottom: 13px;
font-size: 14px;
line-height: 1.7;
}
.article-content ul, .article-content ol {
margin-left: 20px;
margin-bottom: 13px;
color: var(--text-soft);
font-size: 14px;
}
.article-content li { margin-bottom: 5px; }
.article-content a {
color: var(--accent);
text-decoration: underline;
text-underline-offset: 2px;
}
.callout {
background: var(--accent-dim);
border-left: 2px solid var(--accent);
padding: 14px 16px;
border-radius: 0 var(--radius) var(--radius) 0;
margin: 22px 0;
font-size: 13px;
color: var(--text-soft);
}
.callout strong { color: var(--accent); }
.toc {
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
padding: 18px 22px;
margin: 24px 0;
}
.toc h4 {
font-family: var(--font-mono);
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.5px;
color: var(--muted);
margin-bottom: 10px;
}
.toc ol {
margin-left: 16px;
color: var(--muted);
font-size: 13px;
}
.toc ol li { margin-bottom: 4px; }
.toc ol a {
color: var(--muted);
text-decoration: none;
transition: color 0.15s;
}
.toc ol a:hover { color: var(--accent); }
/* ── BLOG GRID ───────────────────────────────── */
.blog-grid {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
gap: 16px;
}
.blog-card {
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius-lg);
padding: 20px;
text-decoration: none;
color: var(--text);
display: flex;
flex-direction: column;
transition: border-color 0.15s, transform 0.15s;
}
.blog-card:hover {
border-color: var(--accent);
transform: translateY(-2px);
}
.blog-card .card-tag {
font-family: var(--font-mono);
font-size: 9px;
font-weight: 600;
letter-spacing: 0.5px;
text-transform: uppercase;
color: var(--accent);
margin-bottom: 10px;
}
.blog-card h2 {
font-size: 14px;
font-weight: 600;
line-height: 1.4;
margin-bottom: 8px;
}
.blog-card p {
font-size: 12px;
color: var(--muted);
flex-grow: 1;
line-height: 1.55;
margin-bottom: 14px;
}
.blog-card .card-meta {
font-family: var(--font-mono);
font-size: 10px;
color: var(--muted);
display: flex;
justify-content: space-between;
align-items: center;
}
.blog-card .read-more {
color: var(--accent);
font-size: 10px;
font-weight: 600;
}
/* ── FOOTER ──────────────────────────────────── */
footer {
border-top: 1px solid var(--border);
padding: 28px 32px;
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap: wrap;
gap: 12px;
font-family: var(--font-mono);
font-size: 11px;
color: var(--muted);
}
.footer-links {
display: flex;
gap: 20px;
flex-wrap: wrap;
}
.footer-links a {
color: var(--muted);
text-decoration: none;
transition: color 0.15s;
}
.footer-links a:hover { color: var(--accent); }
/* ── BUTTONS ─────────────────────────────────── */
.btn {
display: inline-flex;
align-items: center;
gap: 6px;
padding: 9px 18px;
border-radius: var(--radius);
font-family: var(--font);
font-size: 13px;
font-weight: 600;
cursor: pointer;
border: none;
text-decoration: none;
transition: all 0.15s;
}
.btn-primary {
background: var(--accent);
color: #000;
}
.btn-primary:hover {
filter: brightness(1.08);
box-shadow: 0 0 16px var(--accent-glow);
}
/* ── MOBILE NAV ──────────────────────────────── */
.nav-toggle { display: none; }
/* ── BREADCRUMB ──────────────────────────────── */
.breadcrumb {
font-family: var(--font-mono);
font-size: 11px;
color: var(--muted);
margin-bottom: 20px;
display: flex;
gap: 6px;
align-items: center;
flex-wrap: wrap;
}
.breadcrumb a {
color: var(--muted);
text-decoration: none;
transition: color 0.15s;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: 0.35; }
/* ── SECTION HEADER ──────────────────────────── */
.section-header {
display: flex;
justify-content: space-between;
align-items: baseline;
margin-bottom: 20px;
flex-wrap: wrap;
gap: 8px;
}
.section-header h2 {
font-size: 18px;
font-weight: 600;
letter-spacing: -0.3px;
}
.section-header a {
font-family: var(--font-mono);
font-size: 11px;
font-weight: 500;
color: var(--accent);
text-decoration: none;
}
.section-header a:hover { text-decoration: underline; }
/* ── RESPONSIVE ──────────────────────────────── */
/* ── UTILITY ─────────────────────────────────── */
.sr-only {
position: absolute; width: 1px; height: 1px;
padding: 0; margin: -1px; overflow: hidden;
clip: rect(0,0,0,0); border: 0;
}
/* ── Skip to main content (accessibility) ─────────── */
.skip-link {
position: absolute;
top: -100px;
left: 16px;
background: var(--accent);
color: #fff;
padding: 8px 16px;
border-radius: var(--radius);
font-size: 14px;
font-weight: 600;
text-decoration: none;
z-index: 9999;
transition: top 0.15s;
}
.skip-link:focus { top: 16px; }
/* ── Reduced motion preference ─────────────────────── */
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}
/* ── Tools showcase (homepage) ─────────────────────── */
.tools-showcase {
padding: 40px 0 48px;
border-top: 1px solid var(--border);
}
.tools-showcase__title {
font-size: 13px;
font-family: var(--font-mono);
text-transform: uppercase;
letter-spacing: 0.05em;
color: var(--muted);
margin-bottom: 16px;
}
.tools-showcase__grid {
display: flex;
flex-wrap: wrap;
gap: 8px;
}
.tool-chip {
display: inline-block;
padding: 6px 14px;
border: 1px solid var(--border);
border-radius: 20px;
font-size: 13px;
color: var(--text);
text-decoration: none;
transition: border-color 0.15s, color 0.15s, background 0.15s;
white-space: nowrap;
}
.tool-chip:hover {
border-color: var(--accent);
color: var(--accent);
background: var(--accent-dim, rgba(99,102,241,0.08));
}
.tool-chip--all {
border-color: var(--accent);
color: var(--accent);
font-weight: 600;
}
/* ── AdSense: collapse empty fluid slots ───────────────────── */
ins.adsbygoogle {
min-height: 0 !important;
}
ins.adsbygoogle[data-ad-status="unfilled"] {
display: none !important;
height: 0 !important;
min-height: 0 !important;
margin: 0 !important;
}
/* ── Nav overflow gradient hint (mobile) ──────────────────── */
/* ── Touch targets: copy + toggle buttons (WCAG 2.5.5) ─────── */
/* ── Blog card animation: visible by default, animated by JS ── */
.blog-card.will-animate {
opacity: 0;
transform: translateY(14px);
transition: opacity 0.35s ease, transform 0.35s ease;
}
.blog-card.will-animate.visible {
opacity: 1;
transform: translateY(0);
}
/* ═══════════════════════════════════════════════════════
MOBILE NAV — Hamburger menu + header controls
══════════════════════════════════════════════════════ */
/* ── Header controls container (theme toggle + hamburger) ── */
.header-controls {
display: flex;
align-items: center;
gap: 8px;
flex-shrink: 0;
}
/* ── Hamburger button — hidden on desktop ── */
.nav-hamburger {
display: none;
flex-direction: column;
justify-content: center;
align-items: center;
gap: 5px;
width: 44px;
height: 44px;
background: transparent;
border: 1px solid var(--border);
border-radius: var(--radius);
cursor: pointer;
padding: 10px;
transition: border-color 0.15s;
}
.nav-hamburger:hover { border-color: var(--accent); }
.nav-hamburger .ham-bar {
display: block;
width: 18px;
height: 2px;
background: var(--text);
border-radius: 2px;
transition: transform 0.25s ease, opacity 0.25s ease;
}
/* Animated X when open */
.nav-hamburger[aria-expanded="true"] .ham-bar:nth-child(1) {
transform: translateY(7px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] .ham-bar:nth-child(2) {
opacity: 0;
}
.nav-hamburger[aria-expanded="true"] .ham-bar:nth-child(3) {
transform: translateY(-7px) rotate(-45deg);
}
@media (max-width: 768px) {
/* Header: logo left, controls right — single row */
body > header {
padding: 0 16px;
height: 56px;
flex-wrap: nowrap;
justify-content: space-between;
align-items: center;
position: relative;
}
/* Nav: hidden by default, drops down below header */
nav#navMenu {
display: none;
position: fixed;
top: 56px;
left: 0;
right: 0;
background: rgba(10,10,10,0.97);
backdrop-filter: blur(16px);
-webkit-backdrop-filter: blur(16px);
border-bottom: 1px solid var(--border);
flex-direction: column;
padding: 8px 0;
z-index: 999;
mask-image: none;
-webkit-mask-image: none;
animation: navSlideDown 0.2s ease;
}
nav#navMenu.nav-open {
display: flex;
}
@keyframes navSlideDown {
from { opacity: 0; transform: translateY(-8px); }
to { opacity: 1; transform: translateY(0); }
}
nav#navMenu a {
font-size: 15px;
padding: 14px 20px;
width: 100%;
border-bottom: 1px solid var(--border);
white-space: nowrap;
}
nav#navMenu a:last-child { border-bottom: none; }
nav#navMenu a.active {
color: var(--accent);
background: var(--accent-dim);
}
/* Hamburger visible on mobile */
.nav-hamburger { display: flex; }
/* Theme toggle sizing */
.theme-toggle {
width: 44px;
height: 44px;
display: flex;
align-items: center;
justify-content: center;
}
footer { padding: 24px 16px; flex-direction: column; align-items: flex-start; }
.blog-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
.code-copy {
padding: 10px 12px;
font-size: 12px;
min-height: 44px;
}
.code-toggle {
padding: 10px 10px;
min-height: 44px;
min-width: 44px;
}
.code-line {
height: auto;
min-height: 44px;
padding: 6px 10px;
}
.key-right { width: 160px; }
.code-val { font-size: 14px; letter-spacing: 2px; }
.theme-toggle { width: 44px; height: 44px; }
}