/**
 * Header Styles
 * Uses design system CSS variables for consistency
 */

/* Header-specific hover colors */
:root {
    --hover-home: var(--primary-600);
    --hover-services: var(--accent-600);
    --hover-clients: #2980b9;
    --hover-who: #8e44ad;
    --hover-partners: #c0392b;
    --hover-contact: #d35400;
    --hover-portal: var(--slate-700);
}

.header {
    background-color: var(--slate-800);
    color: var(--text-inverse);
    padding: var(--space-4);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(8px);
    background-color: rgba(30, 41, 59, 0.95);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.nav-brand h1 {
    margin: 0;
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    letter-spacing: -0.03em;
}

.nav-brand a {
    display: flex;
    align-items: center;
}

.nav-logo {
    height: 40px;
    width: auto;
    border-radius: var(--radius-lg, 0.75rem);
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: var(--space-2);
}

.nav-item {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background-color: var(--primary-600);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* Per-link hover colors for visual interest */
.nav-item[href*="home"]:hover { background-color: var(--hover-home); box-shadow: 0 0 10px var(--hover-home); }
.nav-item[href*="services"]:hover { background-color: var(--hover-services); box-shadow: 0 0 10px var(--hover-services); }
.nav-item[href*="client-stories"]:hover { background-color: var(--hover-clients); box-shadow: 0 0 10px var(--hover-clients); }
.nav-item[href*="who-we-are"]:hover { background-color: var(--hover-who); box-shadow: 0 0 10px var(--hover-who); }
.nav-item[href*="partners"]:hover { background-color: var(--hover-partners); box-shadow: 0 0 10px var(--hover-partners); }
.nav-item[href*="contact"]:hover { background-color: var(--hover-contact); box-shadow: 0 0 10px var(--hover-contact); }
.nav-item[href*="portal"]:hover { background-color: var(--hover-portal); box-shadow: 0 0 10px var(--hover-portal); }

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Portal button special styling */
.portal-btn {
    background-color: var(--primary-600);
    color: white;
}

.portal-btn:hover {
    background-color: var(--primary-500) !important;
    box-shadow: var(--shadow-glow) !important;
}

/* Mobile navigation toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: white;
    position: relative;
    transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: white;
    transition: all var(--transition-fast);
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

/* Mobile responsive styles */
@media (max-width: 960px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--slate-800);
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-2);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-item {
        width: 100%;
        text-align: center;
        padding: var(--space-3) var(--space-4);
    }
}

/* Body padding for fixed header - only when design system is NOT loaded */
/* Design system handles this, but keep as fallback */
body {
    padding-top: var(--header-height, 70px);
}