:root {
    --color-bg: #f5f5f5;
    --color-text: #16191C;
    --color-text-wh: #ffffff;
    --color-text-muted: #3e3e3e;
    --color-border: rgba(119, 119, 119, 0.4);
    --color-btn: #fa3556;
    --color-accent: #1EBFBF;
    --color-accent-dim: #0a9898;
    --font-mono: 'Courier Prime', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --header-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
}

/* Header Container */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.site-logo-img {
    height: 40px;
    width: auto;
    display: block;
    transition: transform 0.3s ease;
}

.site-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

/* Navigation */
.site-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
    padding: 10px 20px;
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
    cursor: pointer;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 20px;
    right: 20px;
    height: 1px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover {
    color: var(--color-text);
}

.nav-item:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* CTA Button */
.nav-cta {
    margin-left: 16px;
    padding: 12px 28px;
    background: var(--color-btn);
    color: var(--color-bg);
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.mobile-cta {
    display: none;
    padding: 10px 24px;
    background: var(--color-btn);
    color: var(--color-bg);
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 20px;
    }

    .site-nav {
        display: none;
    }

    .mobile-cta {
        display: inline-block;
    }
}

/* Smooth scroll offset for anchor links */
html {
    scroll-padding-top: calc(var(--header-height) + 20px);
}