body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

/* Header / Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    padding: 1rem 0;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    text-decoration: none;
}

.logo-nav img {
    height: 32px;
    width: auto;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover,
nav a.active {
    color: var(--royal-purple);
}

/* Page Header */
.page-header {
    margin-top: 80px;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* Section Containers */
section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem 5rem;
}

.about-content,
.contact-content {
    margin: 0 auto;
    text-align: center;
}

.about-content {
    max-width: 800px;
}

.contact-content {
    max-width: 600px;
}

/* Card base (app-card, news-card) */
.app-card,
.news-card {
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

/* Footer */
footer {
    background-color: var(--gray-900);
    color: var(--gray-400);
    padding: 2rem;
    text-align: center;
}

footer a {
    color: var(--gray-300);
    text-decoration: none;
}

footer a:hover {
    color: var(--white);
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }

    nav ul {
        display: none;
    }
}