:root {
    --primary-blue: #002d62;
    --secondary-blue: #004080;
    --accent-red: #d32f2f;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border-color: #e0e0e0;
}

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

html {
    font-size: 16px !important;
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 16px !important;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    zoom: 1 !important;
}

/* Header & Navigation */
.header-top {
    background-color: var(--bg-light);
    padding: 10px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
}

.header-top a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 15px;
}

.main-header {
    background-color: var(--white);
    padding: 15px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-container img {
    height: 70px;
    width: auto;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links li a {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 1.1rem;
    position: relative;
    padding-bottom: 5px;
    transition: color 0.3s;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-blue);
    transition: width 0.3s ease;
}

.nav-links li a:hover::after, .nav-links li a.active::after {
    width: 100%;
}

.nav-links li a.active {
    color: var(--secondary-blue);
}

/* Hero Section */
.hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    background-size: cover;
    background-position: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 45, 98, 0.7); /* Deep blue overlay */
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    border-radius: 4px;
    transition: background-color 0.3s;
    border: 2px solid var(--white);
}

.btn-primary:hover {
    background-color: var(--white);
    color: var(--primary-blue);
}

/* Common Section Styles */
.section-padding {
    padding: 80px 5%;
}

.section-title {
    text-align: center;
    color: var(--primary-blue);
    font-size: 2.2rem;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--accent-red);
    margin: 15px auto 0;
}

/* Page Specific Content Layouts */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.content-text h3 {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.content-text p {
    margin-bottom: 15px;
    color: var(--text-light);
}

.content-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* ISKO Group Layout */
.group-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.group-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary-blue);
    transition: transform 0.3s;
}

.group-card:hover {
    transform: translateY(-5px);
}

.group-card h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* MD Desk Letter */
.md-letter {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 50px;
    border-radius: 8px;
    border-left: 5px solid var(--primary-blue);
}

.signature {
    margin-top: 30px;
    font-style: italic;
    color: var(--primary-blue);
    font-weight: 600;
}

/* Footer */
.main-footer {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 60px 5% 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-red);
}

.footer-col p, .footer-col ul li {
    margin-bottom: 10px;
    color: #cbd5e1;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--white);
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Add hamburger menu in real app */
    }
    .content-grid {
        grid-template-columns: 1fr;
    }
    .header-top {
        flex-direction: column;
        gap: 10px;
    }
}