/* Global Styles & CSS Variables */
:root {
    --brand-primary: #003366; /* Aeί̈dios Dark Blue */
    --brand-secondary: #0055A4; /* Aeί̈dios Medium Blue */
    --brand-accent: #FFD700;   /* Aeί̈dios Gold/Yellow Accent */
    --text-primary: #1f2937;   /* Dark Gray for text */
    --text-secondary: #4b5563; /* Medium Gray for text */
    --text-light: #f8f9fa;     /* Very light gray/off-white for dark backgrounds */
    --text-white: #ffffff;
    --bg-light: #f9fafb;       /* Light Gray Background for sections */
    --bg-white: #ffffff;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    --container-width: 1140px;
    --section-padding-y: 5rem; 
    --section-padding-x: 1.5rem; 
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-white);
    font-size: 16px; 
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--brand-primary);
    margin-bottom: 0.75em;
    line-height: 1.3;
    font-weight: 700;
}

h1 { font-size: 2.8rem; }
h2.section-title { font-size: 2.2rem; margin-bottom: 2.5rem; } 
h3 { font-size: 1.6rem; font-family: var(--font-sans); font-weight: 600; } 
h4 { font-size: 1.2rem; font-family: var(--font-sans); font-weight: 600;}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--brand-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: var(--brand-primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: var(--section-padding-x);
    padding-right: var(--section-padding-x);
}

/* Section Styling */
section { 
    padding-top: var(--section-padding-y);
    padding-bottom: var(--section-padding-y);
}
.section-light { background-color: var(--bg-light); }
.section-white { background-color: var(--bg-white); }
.section-dark { background-color: var(--brand-primary); color: var(--text-light); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--text-white); }
.section-dark p { color: #e0e0e0; }

.section-title { /* Already defined h2.section-title */
    text-align: center;
}
.section-subtitle {
    font-size: 1.125rem; 
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem auto; 
}
.text-center { text-align: center; }
.font-semibold { font-weight: 600; }

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.8em 1.8em;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    text-align: center;
    line-height: normal; 
}
.btn-primary {
    background-color: var(--brand-accent);
    color: var(--brand-primary) !important; 
    border-color: var(--brand-accent);
}
.btn-primary:hover {
    background-color: #e6c300; 
    border-color: #e6c300;
    color: var(--brand-primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.btn-secondary { 
    background-color: transparent;
    color: var(--text-white) !important;
    border-color: var(--text-white);
}
.btn-secondary:hover {
    background-color: var(--text-white);
    color: var(--brand-primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.btn-secondary-dark { 
    background-color: var(--brand-secondary);
    color: var(--text-white) !important;
    border-color: var(--brand-secondary);
}
.btn-secondary-dark:hover {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--text-white) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.btn-primary-outline {
    background-color: transparent;
    color: var(--brand-secondary) !important;
    border-color: var(--brand-secondary);
    padding: 0.7em 1.5em; /* Slightly smaller for cards */
}
.btn-primary-outline:hover {
    background-color: var(--brand-secondary);
    color: var(--text-white) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.btn-accent { 
    background-color: var(--brand-accent);
    color: var(--brand-primary) !important;
    border-color: var(--brand-accent);
    font-size: 1.1rem;
}
.btn-accent:hover {
    background-color: #e6c300;
    border-color: #e6c300;
    color: var(--brand-primary) !important;
}
.btn i { margin-left: 8px; }

/* Header & Navigation */
.main-header {
    background-color: var(--bg-white);
    padding: 1em 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: var(--section-padding-x);
    padding-right: var(--section-padding-x);
}
.logo-img {
    height: 50px; 
    max-height: 60px;
}
.nav-links {
    list-style: none;
    display: flex;
}
.nav-links li {
    margin-left: 2em; /* Increased spacing for desktop */
}
.nav-links a {
    font-family: var(--font-sans);
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.5em 0;
    position: relative;
    font-size: 0.95rem;
}
.nav-links a::after { 
    content: '';
    position: absolute;
    bottom: -2px; /* Position slightly below text */
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--brand-accent);
    transition: width 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}
.mobile-nav-toggle {
    display: none; 
    background: none;
    border: none;
    color: var(--brand-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* SECTION 1: Hero Banner Styles */
.hero-section {
    background-image: url('../img/Web Landing Page.jpg'); 
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    color: var(--text-white);
    height: 90vh; 
    min-height: 600px; 
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative; 
    z-index: 1;
    padding: 2em; 
}
.hero-section::before { 
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 51, 102, 0.75); 
    z-index: -1; 
}
.hero-content {
    max-width: 850px; 
    z-index: 2;
    /* Basic fade-in animation for hero text */
    animation: fadeInHeroText 1.2s ease-out 0.3s forwards;
    opacity: 0;
    transform: translateY(20px);
}
@keyframes fadeInHeroText {
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}
.hero-title {
    font-size: 3.5rem; 
    color: var(--text-white);
    margin-bottom: 0.3em;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.5);
}
.hero-subtitle {
    font-family: var(--font-serif); 
    font-size: 1.8rem;
    color: var(--text-light); 
    margin-bottom: 1em;
    font-weight: normal; 
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
}
.hero-tagline {
    font-size: 1.15rem;
    color: #e0e0e0; 
    margin-bottom: 2.5em;
    line-height: 1.7;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
}
.hero-buttons .btn {
    margin: 0.5em;
    min-width: 180px;
}

/* SECTION 3: Core Pillars Styles */
.grid {
    display: grid;
    gap: 2em;
}
.grid-3-cols {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card { /* Base card style */
    background: var(--bg-white);
    padding: 2em 1.5em;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border-radius: 8px;
    transition: all 0.3s ease-out;
}
.card:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transform: translateY(-8px);
}
.pillar-card { 
    text-align: center;
    border-top: 4px solid transparent; 
}
.pillar-card:hover {
    border-top-color: var(--brand-accent);
}
.pillar-icon {
    font-size: 2.8rem;
    color: var(--brand-accent);
    margin-bottom: 0.75em;
    line-height: 1; 
}
.pillar-card h3 {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--brand-primary);
    margin-bottom: 0.5em;
}
.pillar-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.grid-col-span-3-center { 
    grid-column: auto / span 3;
    max-width: 320px; 
    margin-left: auto;
    margin-right: auto;
}

/* SECTION 4: Our Business Units Styles */
.bu-card { /* Extends .card */
    display: flex;
    flex-direction: column;
    text-align: center; 
}
.bu-logo {
    height: 70px; /* Slightly increased */
    max-width: 180px; /* Slightly increased */
    margin: 0 auto 1.2em auto; 
    object-fit: contain; 
}
.bu-card h3 {
    font-family: var(--font-sans);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--brand-primary);
    margin-bottom: 0.5em;
}
.bu-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5em;
    flex-grow: 1; 
}
.bu-card .btn-primary-outline {
    align-self: center; 
    margin-top: auto; 
}

/* SECTION 5: Aeί̈dios Global Presence Styles */
.map-placeholder-container img {
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-top: 2em;
    margin-bottom: 1.5em;
}
.map-locations-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}
.map-locations-text strong {
    color: var(--text-primary);
}

/* SECTION 6: Featured Strategic Venture Styles */
.section-brand-secondary { 
    background-color: var(--brand-secondary);
    color: var(--text-white);
}
.section-brand-secondary .section-title, 
.section-brand-secondary h3 { /* Combined h3 here */
    color: var(--text-white);
}
.section-brand-secondary p {
    color: #e0e0e0;
}
.featured-venture-card {
    background: rgba(255, 255, 255, 0.05); 
    padding: 2.5em;
    border-radius: 12px;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.featured-venture-card h3 { 
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 0.5em;
}
.featured-venture-card p {
    font-size: 1.05rem;
    margin-bottom: 1.5em;
}
.featured-venture-card .btn-accent {
    font-size: 1.1rem;
    padding: 0.8em 2em;
}

/* SECTION 7: Contact Us Styles */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr; 
    gap: 3em;
}
.contact-form-container h3, .contact-details-container h3 {
    font-family: var(--font-serif);
    font-size: 1.7rem;
    color: var(--brand-primary);
    margin-bottom: 1.5em;
}
.form-group {
    margin-bottom: 1.5em;
}
.form-group label {
    display: block;
    font-family: var(--font-sans);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5em;
    font-size: 0.9rem;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="subject"], /* Added subject for consistency */
.form-group textarea {
    width: 100%;
    padding: 0.9em;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="subject"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brand-secondary);
    box-shadow: 0 0 0 2px rgba(0, 85, 164, 0.2);
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
.contact-form-container .btn-primary {
    font-size: 1.05rem;
    padding: 0.9em 2em;
}

.location-item {
    margin-bottom: 2em;
}
.location-item:last-child {
    margin-bottom: 0;
}
.location-item h4 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 0.4em;
}
.location-item h4 i { 
    margin-right: 0.6em;
    color: var(--brand-secondary);
    font-size: 1rem; /* Adjusted icon size */
}
.location-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.location-item p a { /* Styling for tel and mailto links in contact details */
    color: var(--text-secondary);
}
.location-item p a:hover {
    color: var(--brand-primary);
}


/* Footer Styles */
.main-footer {
    background: var(--text-primary);
    color: #a0aec0; 
    padding: 3em var(--section-padding-x);
    text-align: center;
    font-size: 0.9rem;
}
.main-footer p {
    color: #a0aec0;
    margin-bottom: 0.5em;
}
.footer-links a {
    color: #cbd5e0; 
    margin: 0 0.75em;
}
.footer-links a:hover {
    color: var(--brand-accent);
}

/* Responsive Adjustments */
@media (min-width: 768px) { /* Desktop and larger tablets */
    .contact-grid {
        grid-template-columns: 1fr 1fr; 
    }
}
@media (min-width: 992px) { 
    .grid-col-span-3-center {
        grid-column: 2 / span 1; 
    }
}

@media (max-width: 991px) { 
    .nav-links {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 100%; 
        left: 0;
        width: 100%;
        background-color: var(--bg-white);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        padding-bottom: 1em;
    }
    .nav-links.active {
        display: flex; 
    }
    .nav-links li {
        margin: 0;
        width: 100%;
        text-align: center;
    }
    .nav-links a {
        display: block;
        padding: 1em;
        border-bottom: 1px solid #eee;
    }
    .nav-links a::after {
        display: none; 
    }
    .mobile-nav-toggle {
        display: block; 
    }

    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.4rem; }
    .hero-tagline { font-size: 1rem; }

    h2.section-title { font-size: 1.8rem; margin-bottom: 2rem; }
    h3 { font-size: 1.4rem; }

    .grid-3-cols { grid-template-columns: 1fr 1fr; } 
    .grid-col-span-3-center { grid-column: auto / span 2; }
    .pillar-card, .bu-card { padding: 1.5em; }
}

@media (max-width: 576px) { 
    body { font-size: 15px; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .hero-tagline { font-size: 0.9rem; }
    .hero-buttons .btn { display: block; margin: 0.75em auto; width: 90%; }

    h2.section-title { font-size: 1.6rem; }
    h3 { font-size: 1.3rem; }

    .grid-3-cols { grid-template-columns: 1fr; } 
    .grid-col-span-3-center { grid-column: auto / span 1; max-width: 100%;}

    .contact-grid { grid-template-columns: 1fr; } 
    .contact-form-container, .contact-details-container { padding: 0; } /* Remove padding if it's on columns directly */
}