header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(249, 249, 247, 0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}

nav {
    max-width: calc(var(--max-width) + (var(--content-padding) * 2));
    margin: 0 auto;
    padding: 1rem var(--content-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    flex-shrink: 0;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.logo-image {
    height: 38px;
    width: auto;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.6rem;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

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

.nav-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-shrink: 0;
}

.cta-button,
.demo-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0.7rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 0.92rem;
    font-weight: 500;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.cta-button {
    background: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-bg);
}

.cta-button:hover {
    background: #2a2a2a;
    border-color: #2a2a2a;
    color: var(--color-bg);
}

.demo-button:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}