:root {
    --primary: #0072FF;
    --secondary: #00C6FF;
    --dark-bg: #0f1115;
    --card-bg: #1a1d24;
    --text-main: #e0e6ed;
    --text-muted: #94a3b8;
    --accent: #00e5ff;
    --header-height: 70px;
}

* { box-sizing: border-box; }

body {
    background-color: var(--dark-bg);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    margin: 0;
    line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

/* HEADER & NAV REBUILD */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-height);
    background: rgba(15, 17, 21, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 2000;
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: #fff; }
.brand-logo { height: 35px; width: 35px; }
.brand-name { font-weight: 700; font-size: 1.25rem; }

.nav-list { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav-link { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: color 0.2s; }
.nav-link:hover { color: var(--secondary); }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 2100;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    position: relative;
    transition: background 0.2s;
}
.hamburger::before, .hamburger::after {
    content: "";
    position: absolute;
    width: 24px;
    height: 2px;
    background: #fff;
    left: 0;
    transition: transform 0.2s;
}
.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* Mobile Menu Logic */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--dark-bg);
        display: flex;
        justify-content: center;
        align-items: center;
        transition: right 0.3s ease-in-out;
        z-index: 2050;
    }
    
    .nav-menu.is-open { right: 0; }
    
    .nav-list { flex-direction: column; text-align: center; gap: 2.5rem; }
    .nav-link { font-size: 1.5rem; }
    
    .nav-toggle.is-active .hamburger { background: transparent; }
    .nav-toggle.is-active .hamburger::before { transform: rotate(45deg) translate(5px, 6px); }
    .nav-toggle.is-active .hamburger::after { transform: rotate(-45deg) translate(5px, -6px); }
}

/* Rest of the styles */
main { padding-top: var(--header-height); }
.hero { padding: 80px 0; text-align: center; }
h1 { font-size: 3rem; margin-bottom: 1.5rem; color: #fff; line-height: 1.1; }
.hero p { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 2.5rem; }
.cta-button { background: linear-gradient(90deg, var(--primary), var(--secondary)); color: white; padding: 0.9rem 2.2rem; border-radius: 50px; text-decoration: none; font-weight: 600; display: inline-block; }
.ai-badge { display: inline-block; background: rgba(0, 198, 255, 0.1); color: var(--accent); padding: 0.3rem 0.8rem; border-radius: 4px; font-size: 0.85rem; margin-bottom: 1rem; font-weight: 600; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; padding: 60px 0; }
.card { background: var(--card-bg); padding: 2rem; border-radius: 12px; border: 1px solid rgba(255,255,255,0.05); }
.chart-container { background: var(--card-bg); padding: 1.5rem; border-radius: 12px; border: 1px solid rgba(255,255,255,0.05); margin: 2rem 0; text-align: center; }
.chart-svg { max-width: 100%; height: auto; }
footer { padding: 4rem 0; text-align: center; border-top: 1px solid rgba(255,255,255,0.05); }