/* SIE Inc - Professional Website Styles */

/* CSS Variables */
:root {
    --primary-navy: #1B1B3A;
    --primary-blue: #2980b9;
    --steel-grey: #2c3e50;
    --light-grey: #ecf0f1;
    --white: #ffffff;
    --dark-overlay: rgba(0, 0, 0, 0.75);
    --section-padding: 80px;
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--steel-grey);
    background: var(--white);
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-link {
    display: flex;
    align-items: center;
}

.header-logo {
    display: block;
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: var(--transition);
}

.header-logo:hover {
    opacity: 0.85;
    transform: scale(1.02);
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

nav a {
    color: var(--steel-grey);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 0;
}

nav a:hover {
    color: var(--primary-blue);
}

.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 280px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    border-radius: var(--border-radius);
    padding: 10px 0;
    margin-top: 5px;
    z-index: 1000;
}

.dropdown:hover .dropdown-content,
.dropdown-content:hover {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 12px 20px;
    color: var(--steel-grey);
}

.dropdown-content a:hover {
    background: var(--light-grey);
    color: var(--primary-blue);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--steel-grey);
    cursor: pointer;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

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

.hero h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

/* Sections */
section {
    padding: var(--section-padding) 0;
}

section:nth-child(even) {
    background: var(--light-grey);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-navy);
    text-align: center;
    margin-bottom: 50px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--steel-grey);
    text-align: center;
    max-width: 800px;
    margin: -30px auto 50px;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

/* Cards */
.card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.card h3 {
    font-size: 1.5rem;
    color: var(--primary-navy);
    margin-bottom: 15px;
}

.card p {
    color: var(--steel-grey);
    margin-bottom: 15px;
}

.card ul {
    list-style: none;
    padding-left: 0;
}

.card ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 35px;
    background: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: #1f5f8b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(41, 128, 185, 0.3);
}

.btn-secondary {
    background: var(--steel-grey);
}

.btn-secondary:hover {
    background: var(--primary-navy);
}

/* Forms */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--steel-grey);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* Contact Info */
.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.contact-info h3 {
    color: var(--primary-navy);
    margin-bottom: 20px;
}

.contact-item {
    margin-bottom: 20px;
}

.contact-item h4 {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.contact-item p {
    color: var(--steel-grey);
    margin: 5px 0;
}

/* Footer */
footer {
    background: var(--primary-navy);
    color: var(--white);
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-column h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-logo {
    display: block;
    height: 40px;
    width: auto;
    max-width: 180px;
    margin-bottom: 20px;
    object-fit: contain;
}

.footer-column p {
    margin: 10px 0;
    opacity: 0.9;
    font-size: 0.95rem;
}

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

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.85;
    transition: var(--transition);
}

.footer-column a:hover {
    opacity: 1;
    color: var(--primary-blue);
}

.footer-locations p {
    padding-left: 20px;
    position: relative;
}

.footer-locations p::before {
    content: '📍';
    position: absolute;
    left: 0;
}

.linkedin-btn {
    display: inline-block;
    background: #0077b5;
    color: var(--white);
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.linkedin-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,119,181,0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --section-padding: 60px;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 40px;
    }
    
    /* Mobile Navigation */
    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: 2px 0 10px rgba(0,0,0,0.1);
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    nav.active {
        left: 0;
    }
    
    nav ul {
        flex-direction: column;
        padding: 80px 20px 20px;
        gap: 0;
    }
    
    nav ul li {
        width: 100%;
        border-bottom: 1px solid var(--light-grey);
    }
    
    nav a {
        display: block;
        padding: 15px 0;
    }
    
    .dropdown-content {
        position: static;
        display: none;
        box-shadow: none;
        background: var(--light-grey);
        margin-top: 0;
    }
    
    .dropdown.active .dropdown-content {
        display: block;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    /* Hero */
    .hero {
        height: 300px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    /* Grids */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .header-logo {
        height: 40px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .card {
        padding: 30px 20px;
    }
    
    .header-logo {
        height: 36px;
    }
}