/* LedgerFlow marketing site — shared base / design system.
   Canonical, deduplicated rules common to the site's pages; page-specific rules
   and deliberate per-page accent overrides live in css/<page>.css (loaded AFTER
   this file). */

/* Self-hosted fonts (Inter + JetBrains Mono, SIL OFL 1.1). Replaces the
   Google Fonts CDN so no visitor IP is sent to Google (GDPR). See assets/fonts/. */
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/inter-400-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/inter-400-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/inter-500-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/inter-500-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url(../assets/fonts/inter-600-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url(../assets/fonts/inter-600-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:700;font-display:swap;src:url(../assets/fonts/inter-700-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:700;font-display:swap;src:url(../assets/fonts/inter-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:800;font-display:swap;src:url(../assets/fonts/inter-800-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:800;font-display:swap;src:url(../assets/fonts/inter-800-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/jetbrains-mono-400-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/jetbrains-mono-400-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/jetbrains-mono-500-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/jetbrains-mono-500-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}

:root{--bg:#0A0F1E;--bg-2:#0E1428;--surface:#111827;--surface-2:#1A2235;--border:rgba(255,255,255,0.08);--border-hover:rgba(255,255,255,0.16);--text-1:#F8F9FA;--text-2:#CBD5E1;--text-3:#64748B;--accent:#00D4AA;--accent-dark:#00A882;--accent-glow:rgba(0,212,170,0.15);--radius:12px;--radius-lg:20px;--transition:0.25s cubic-bezier(0.4,0,0.2,1);--nav-h:72px;--font-mono:'JetBrains Mono',monospace}
[data-theme="light"] {
      --bg: #F4F7F8; --bg-2: #EBF0F4; --surface: #FFFFFF; --surface-2: #F0F4F7;
      --border: rgba(0,0,0,0.08); --border-hover: rgba(0,0,0,0.16);
      --text-1: #0A0F1E; --text-2: #3A5068; --text-3: #7A96AC;
      --accent: #00A489; --accent-dark: #007A67; --accent-glow: rgba(0,164,137,0.12);
    }
* { box-sizing: border-box; margin: 0; padding: 0; }
*::before { box-sizing: border-box; margin: 0; padding: 0; }
*::after { box-sizing: border-box; margin: 0; padding: 0; }
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text-1);font-family:'Inter',sans-serif;line-height:1.6;overflow-x:hidden;transition:background .2s,color .2s}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(48px, 6vw, 80px) 0; }
.section-label { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.section-title{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.15;color:var(--text-1);margin-bottom:16px}
.section-sub{font-size:clamp(16px,2vw,18px);color:var(--text-2);max-width:680px;line-height:1.7}
.section-header{margin-bottom:40px}
.section-header.center { text-align: center; }
.section-header.center .section-sub { margin: 0 auto; }
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 8px; font-size: 15px; font-weight: 600; transition: all var(--transition); }
.btn-primary { background: var(--accent); color: #0A0F1E; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,212,170,0.3); }
.btn-ghost { background: transparent; color: var(--text-1); border: 1px solid var(--border-hover); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-lg { padding: 16px 32px; font-size: 17px; border-radius: 10px; }
.nav-logo { display: flex; align-items: center; gap: 0; font-size: 22px; font-weight: 800; color: var(--text-1); letter-spacing: -0.5px; white-space: nowrap; }
.nav-logo span { color: var(--accent); }
#nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0 24px; transition: background var(--transition), backdrop-filter var(--transition); }
#nav.scrolled { background: rgba(10,15,30,0.94); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
[data-theme="light"] #nav.scrolled { background: rgba(244,247,248,0.94); }
.nav-inner { max-width: 1200px; margin: 0 auto; height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links > li > a { font-size: 14px; font-weight: 500; color: var(--text-1); padding: 8px 12px; border-radius: 6px; transition: color var(--transition), background var(--transition); display: flex; align-items: center; gap: 4px; }
.nav-links > li > a:hover { color: var(--text-1); background: var(--surface); }
.has-dropdown { position: relative; }
.dropdown { position: absolute; top: calc(100% + 6px); left: -8px; background: rgba(10,15,30,0.97); backdrop-filter: blur(20px); border: 1px solid var(--border); border-radius: 12px; padding: 6px; min-width: 210px; z-index: 500; opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity 0.18s ease, transform 0.18s ease, visibility 0s linear 0.18s; }
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); transition: opacity 0.18s ease, transform 0.18s ease; }
.dropdown a { display: block; padding: 9px 14px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--text-2); transition: all 0.15s; }
.dropdown a:hover { background: var(--surface-2); color: var(--accent); }
[data-theme="light"] .dropdown { background: rgba(244,247,248,0.97); }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.theme-toggle { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--text-2); border: 1px solid var(--border); background: var(--surface); transition: all var(--transition); }
.theme-toggle svg { width: 16px; height: 16px; }
.nav-actions .btn { padding: 9px 18px; font-size: 14px; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-1); border-radius: 2px; transition: all var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu { display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; background: rgba(10,15,30,0.98); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 16px 24px 24px; z-index: 999; max-height: calc(100vh - var(--nav-h)); overflow-y: auto; }
[data-theme="light"] .mobile-menu { background: rgba(244,247,248,0.98); }
.mobile-menu.open { display: block; }
.mobile-section-title { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); padding: 12px 8px 6px; }
.mobile-link { display: block; padding: 10px 8px; font-size: 15px; font-weight: 500; color: var(--text-2); border-bottom: 1px solid var(--border); }
.mobile-link.indent { padding-left: 20px; font-size: 14px; }
.mobile-actions { display: flex; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.mobile-actions .btn { flex: 1; justify-content: center; font-size: 14px; }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%); }
[data-theme="light"] .hero-grid { background-image: linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px); }
footer{background:var(--surface);border-top:1px solid var(--border);padding:64px 0 32px}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-logo{display:flex;align-items:center;gap:0;font-size:20px;font-weight:800;margin-bottom:12px;white-space:nowrap}
.footer-logo span { color: var(--accent); }
.footer-tagline{font-size:14px;color:var(--text-3);line-height:1.6;margin-bottom:20px;max-width:260px}
.footer-socials{display:flex;gap:12px}
.footer-social{width:34px;height:34px;border-radius:8px;background:var(--surface-2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-3);transition:all var(--transition)}
.footer-social svg { width: 16px; height: 16px; }
.footer-social:hover{border-color:var(--accent);color:var(--accent)}
.footer-col-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);margin-bottom:16px}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-2); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom{border-top:1px solid var(--border);padding-top:28px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-copy { font-size: 13px; color: var(--text-3); }

/* Anchor targets clear the fixed nav when reached via #hash links (the Developer
   and Built-for-AI dropdowns are in-page anchor menus). */
section[id] { scroll-margin-top: calc(var(--nav-h) + 24px); }

/* Nav density: the bar now carries six top-level items, so the desktop nav
   collapses to the hamburger earlier (≤1000px) than the per-page 768px content
   breakpoints — it never wraps/overflows on tablets. app.js uses the same 1000px
   threshold for auto-closing the mobile menu on resize. */
@media (max-width: 1000px) {
  .nav-links, .nav-actions .btn { display: none; }
  .hamburger { display: flex; }
}