/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
img, svg { display: block; max-width: 100%; }

/* Light theme tokens (OpenAI-inspired minimalism) */
:root {
    --bg: #ffffff;
    --bg-2: #f6f7f9;
    --bg-3: #eef1f4;
    --text: #0b0f19;
    --muted: #5b6475;
    --card: #ffffff;
    --glass: rgba(255,255,255,0.8);
    --border: rgba(15, 23, 42, 0.08);
    --primary: #0b0f19; /* black button */
    --primary-2: #0b0f19;
    --accent: #0b0f19;
    --error: #ef4444;
    --shadow-elev: 0 8px 30px rgba(2, 8, 23, 0.06);
    --radius-1: 10px;
    --radius-2: 14px;
    --radius-3: 20px;
    --grid-max: 1200px;
    --grid-pad: 24px;
    --glass-blur: 10px;
    --speed-1: 120ms;
    --speed-2: 220ms;
    --speed-3: 600ms;
    --easing: cubic-bezier(.2,.8,.2,1);
}

/* Base */
body.theme-light {
    background: var(--bg);
    color: var(--text);
    font: 500 16px/1.7 Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* Typography */
h1, h2, h3, h4 { font-family: "Space Grotesk", Inter, system-ui, sans-serif; letter-spacing: .2px; color: var(--text); }
h1 { font-weight: 700; font-size: clamp(44px, 6vw, 64px); line-height: 1.04; letter-spacing: -0.02em; }
h2 { font-weight: 700; font-size: clamp(28px, 3.4vw, 40px); line-height: 1.12; letter-spacing: -0.01em; }
h3 { font-weight: 600; font-size: clamp(18px, 2.4vw, 22px); }
p.subtitle { color: #3b4456; font-size: clamp(16px, 2.2vw, 20px); max-width: 820px; }

/* Layout primitives */
.container {
    max-width: var(--grid-max);
    margin-inline: auto;
    padding-inline: var(--grid-pad);
}
section { padding: clamp(56px, 7vw, 110px) 0; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 50;
    backdrop-filter: blur(var(--glass-blur));
    background: rgba(255,255,255,0.85);
    border-bottom: 1px solid var(--border);
    transition: background var(--speed-2) var(--easing), border-color var(--speed-2) var(--easing), box-shadow var(--speed-2) var(--easing);
}
.site-header.elevated { box-shadow: 0 8px 24px rgba(2,8,23,0.06); background: rgba(255,255,255,0.95); }
.nav-wrap { display: flex; align-items: center; gap: 18px; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: .2px; }
.nav { margin-left: auto; display: none; gap: 22px; }
.nav a { color: #2b3343; text-decoration: none; transition: color var(--speed-1) var(--easing); }
.nav a:hover { color: var(--text); }
.nav-cta { display: none; gap: 10px; margin-left: 8px; }
.nav-toggle { margin-left: auto; width: 42px; height: 42px; display: grid; place-content: center; background: transparent; border: 1px solid var(--border); border-radius: 10px; cursor: pointer; }
.nav-toggle span { width: 18px; height: 2px; background: var(--text); display: block; margin: 2px 0; border-radius: 2px; }

/* Desktop nav */
@media (min-width: 900px) {
    .nav { display: flex; }
    .nav-cta { display: flex; }
    .nav-toggle { display: none; }
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: #fafbfc; padding-top: 56px; }
.footer-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
.footer-grid .col.brand { grid-column: span 6; }
.footer-grid .col { grid-column: span 2; }
.footer-grid h4 { color: var(--text); margin-bottom: 12px; font-size: 12px; text-transform: uppercase; letter-spacing: .14em; opacity: .9; }
.footer-grid ul { list-style: none; display: grid; gap: 10px; }
.footer-grid a { color: #3b4456; text-decoration: none; }
.footer-grid a:hover { color: var(--text); }
.footer-grid .logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; }
.footer-grid .logo .dot { width: 10px; height: 10px; border-radius: 50%; background: #0b0f19; box-shadow: none; }
.footnote { display: flex; gap: 10px; align-items: center; justify-content: center; padding: 22px 0 32px; color: #6b7280; border-top: 1px dashed var(--border); margin-top: 24px; }
.footnote .sep { opacity: .6; }

/* Components */
.btn {
    position: relative;
    display: inline-flex; align-items: center; justify-content: center;
    gap: 10px; padding: 14px 18px;
    color: #ffffff; font-weight: 700; text-decoration: none;
    background: var(--primary);
    border: 1px solid #0b0f19;
    border-radius: 999px;
    box-shadow: 0 10px 25px rgba(2,8,23,0.06);
    transition: transform var(--speed-1) var(--easing), box-shadow var(--speed-2) var(--easing), background var(--speed-2) var(--easing), opacity var(--speed-2);
    will-change: transform;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 18px 40px rgba(2,8,23,0.10); }
.btn:active { transform: translateY(0); }
.btn.small { padding: 10px 14px; font-size: 14px; }
.btn-ghost {
    background: #ffffff; color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}
.btn-ghost:hover { border-color: rgba(2,8,23,0.20); background: #f8fafc; }
.btn-primary { background: #0b0f19; color: #ffffff; border-color: #0b0f19; }

/* Cards / Surfaces */
.card { background: #ffffff; border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow-elev); padding: 18px; }
.glass { background: rgba(255,255,255,0.7); border: 1px solid var(--border); border-radius: var(--radius-3); backdrop-filter: blur(var(--glass-blur)); box-shadow: var(--shadow-elev); }

/* Chips */
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; background: #f3f4f6; border: 1px solid var(--border); color: #111827; border-radius: 999px; font-size: 14px; }

/* Utilities */
.hidden { display: none !important; }
.center { text-align: center; }
.muted { color: var(--muted); }

/* Selection + Scrollbar */
::selection { background: #111827; color: #fff; }
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-thumb { background: #cfd5df; border: 3px solid var(--bg); border-radius: 999px; }
::-webkit-scrollbar-track { background: #f1f3f6; }

/* Links */
a { color: #111827; }
a:hover:not(.btn) { color: #0b0f19; }

/* Animation helpers */
@keyframes floatY { 0% { transform: translateY(0) } 50% { transform: translateY(-6px) } 100% { transform: translateY(0) } }

/* Media tweaks */
@media (max-width: 899px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid .col.brand { grid-column: span 2; }
}
/* Header polish */
.site-header {
    position: sticky; top: 0; z-index: 50;
    backdrop-filter: blur(var(--glass-blur));
    background: rgba(255,255,255,0.78);
}
.site-header::after {
    content: "";
    position: absolute; inset: auto 0 0 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(2,8,23,0.08), transparent);
    transform: scaleY(1); transform-origin: bottom;
    transition: opacity var(--speed-2) var(--easing);
    opacity: .8;
}
.site-header.elevated { box-shadow: 0 8px 24px rgba(2,8,23,0.06); background: rgba(255,255,255,0.92); }
.site-header.elevated::after { opacity: 1; }

/* Nav link underline animation */
.nav a {
    position: relative;
    color: #2b3343; text-decoration: none;
}
.nav a::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
    background: #0b0f19;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--speed-2) var(--easing);
    opacity: .9;
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { transform: scaleX(1); }

/* Mobile menu: tidy slide-down */
@media (max-width: 899px) {
    .nav-wrap { position: relative; }
    .nav.open, .nav-cta.open {
        width: 100%;
        padding: 12px 0 10px;
        border-top: 1px solid var(--border);
        animation: fadeDown var(--speed-2) var(--easing);
    }
    .nav.open { flex-direction: column; align-items: flex-start; gap: 12px; }
    .nav-cta.open { justify-content: flex-start; gap: 10px; }
    @keyframes fadeDown { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
}

/* Burger to X animation */
.nav-toggle { position: relative; overflow: hidden; }
.nav-toggle span {
    width: 18px; height: 2px; background: var(--text); display: block; margin: 2px 0; border-radius: 2px;
    transition: transform var(--speed-2) var(--easing), opacity var(--speed-2) var(--easing);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* Header CTAs micro glow */
.nav-cta .btn-primary.small {
    box-shadow: 0 8px 22px rgba(2,8,23,0.10);
}
.nav-cta .btn-primary.small:hover {
    box-shadow: 0 14px 36px rgba(2,8,23,0.16);
}/* Fancy primary button with label */
.btn .btn-text { display: block; }
.btn .btn-label {
    display: block;
    margin-top: 2px;
    font-size: 12px;
    line-height: 1.1;
    letter-spacing: .2px;
    opacity: .85;
    color: #e8edf6;
}

/* Elevated gradient, soft glow, and shimmer */
.btn-primary.fancy {
    background: linear-gradient(140deg, #0b0f19 0%, #121826 45%, #0b0f19 100%);
    border: 1px solid #0b0f19;
    box-shadow:
        0 12px 28px rgba(2,8,23,0.16),
        inset 0 -2px 0 rgba(255,255,255,0.06);
    overflow: hidden;
}
.btn-primary.fancy:hover {
    box-shadow:
        0 14px 36px rgba(2,8,23,0.18),
        inset 0 -2px 0 rgba(255,255,255,0.08);
    transform: translateY(-1px);
}

/* Shimmer sweep */
.btn-primary.fancy::before {
    content: "";
    position: absolute;
    inset: -120% -40% auto -40%;
    height: 300%;
    transform: rotate(20deg) translateX(-30%);
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.035) 50%, transparent 100%);
    transition: transform var(--speed-3) var(--easing), opacity var(--speed-2) var(--easing);
    pointer-events: none;
    opacity: 0;
}
.btn-primary.fancy:hover::before {
    transform: rotate(20deg) translateX(-10%);
    opacity: .28;
}

/* Subtle outer glow ring */
.btn-primary.fancy::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 999px;
    background: radial-gradient(60% 60% at 50% 50%, rgba(99,102,241,0.18), transparent 60%);
    opacity: .0;
    transition: opacity var(--speed-2) var(--easing);
    pointer-events: none;
}
.btn-primary.fancy:hover::after { opacity: .18; }/* Hide the "Powered by Code Canvas" floating badge */
a[href="https://codecanvas.ai"] {
    display: none !important;
}