:root {
    --bg: #FFFFFF;
    --fg: #1F2937;
    --muted: #6B7280;
    --accent-start: #303653;
    --accent-end: #8B5CF6;
    --border: rgba(31, 41, 55, 0.1);
    --card-bg: rgba(249, 250, 251, 0.8);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --header-bg: rgba(255, 255, 255, 0.9);
    --header-bg-scroll: rgba(255, 255, 255, 0.95);
    --transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: #0B0F19;
    --fg: #E6E9F2;
    --muted: #8B9BB8;
    --accent-start: #303653;
    --accent-end: #A78BFA;
    --border: rgba(230, 233, 242, 0.1);
    --card-bg: rgba(230, 233, 242, 0.03);
    --header-bg: rgba(11, 15, 25, 0.9);
    --header-bg-scroll: rgba(11, 15, 25, 0.95);
}

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

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

.logo img {
    height: 95px;
    width: auto;
}

.logo .logo-dark {
    display: none;
}

[data-theme="dark"] .logo .logo-dark {
    display: block;
}

[data-theme="dark"] .logo .logo-light {
    display: none;
}

.header-actions {
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--muted);
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--fg);
}

.theme-switch {
    display: flex;
    align-items: center;
    margin-left: 1rem;
}

.theme-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card-bg);
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--fg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

[data-theme="dark"] .theme-toggle::before {
    transform: translateX(20px);
    background: var(--accent-end);
}

.theme-toggle::after {
    content: '☀️';
    position: absolute;
    top: 50%;
    left: 4px;
    transform: translateY(-50%);
    font-size: 10px;
    opacity: 0.6;
    pointer-events: none;
}

[data-theme="dark"] .theme-toggle::after {
    content: '🌙';
    right: 4px;
    left: auto;
}

.mobile-menu {
    display: none;
    margin-left: 0.75rem;
    border: 0;
    background: none;
    color: var(--fg);
    cursor: pointer;
}

.hero {
    padding: 10rem 0 3rem;
    background: radial-gradient(ellipse at center, rgba(48, 54, 83, 0.1) 0%, transparent 50%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
    align-items: center;
}

h1 {
    margin-bottom: 1.25rem;
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0;
    background: linear-gradient(45deg, var(--fg), var(--accent-start));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    margin-bottom: 1rem;
    font-size: 2rem;
    line-height: 1.15;
}

h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

p,
li {
    color: var(--muted);
}

p {
    margin-bottom: 1rem;
}

ul {
    padding-left: 1.2rem;
}

li {
    margin-bottom: 0.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--fg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    border: 0;
    color: #fff;
    background: linear-gradient(45deg, var(--accent-start), var(--accent-end));
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card {
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card-bg);
    box-shadow: var(--shadow);
}

.section {
    padding: 3rem 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.before-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.metric {
    margin-bottom: 0.25rem;
    color: var(--accent-start);
    font-size: 2rem;
    font-weight: 800;
}

.eyebrow {
    display: inline-flex;
    margin-bottom: 1rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid rgba(48, 54, 83, 0.2);
    border-radius: 999px;
    background: rgba(48, 54, 83, 0.08);
    color: var(--accent-start);
    font-size: 0.8rem;
    font-weight: 700;
}

.lead {
    font-size: 1.2rem;
    line-height: 1.45;
}

.cta-band {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(48, 54, 83, 0.08), rgba(139, 92, 246, 0.08));
    text-align: center;
}

.step-list {
    counter-reset: steps;
    list-style: none;
    padding-left: 0;
}

.step-list li {
    position: relative;
    margin-bottom: 0.75rem;
    padding-left: 2.2rem;
}

.step-list li::before {
    counter-increment: steps;
    content: counter(steps);
    position: absolute;
    left: 0;
    top: 0.1rem;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--accent-start), var(--accent-end));
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    line-height: 1.5rem;
    text-align: center;
}

footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
}

@media (max-width: 768px) {
    .logo img {
        height: 58px;
    }

    .nav {
        display: none;
    }

    .nav.mobile-open {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
        border-top: 1px solid var(--border);
        background: var(--header-bg);
        backdrop-filter: blur(10px);
        box-shadow: var(--shadow-lg);
    }

    .mobile-menu {
        display: block;
    }

    .theme-switch {
        margin-left: 0.5rem;
    }

    .hero {
        padding-top: 8rem;
    }

    .hero-grid,
    .grid,
    .grid-2,
    .before-after {
        grid-template-columns: 1fr;
    }
}