/* --- Global Styles --- */
:root {
    /* Χρώματα Βασισμένα στο Λογότυπο */
    --primary-color: #f79c32; /* Orange box/accent */
    --secondary-color: #a9d0f1; /* Light Blue box/accent */
    --gold-accent: #e8b750; /* Gold text highlight from bottom bar */
    --text-color: #333333; /* Dark text */
    --heading-color: #000000; /* Black heading */
    --bg-color-main: #fcfcfc; /* Main background color, almost white */
    --bg-color-alt: #f0f0f0; /* Alternate background for sections */
    --footer-bg-color: #505050; /* Dark gray background from bottom bar */
    --footer-text-color: #e8b750; /* Gold text for footer */
    --white: #ffffff;
    --border-color: #e0e0e0;

    /* Γραμματοσειρές - ΑΛΛΑΞΕ ΤΙΣ ΓΡΑΜΜΑΤΟΣΕΙΡΕΣ ΕΔΩ (αν θες) */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Διαστάσεις */
    --header-height: 80px;
    --spacing-xs: 10px;
    --spacing-sm: 20px;
    --spacing-md: 40px;
    --spacing-lg: 80px;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth; /* Smooth scrolling */
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--text-color);
    background-color: var(--bg-color-main);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--heading-color);
    margin-bottom: var(--spacing-sm);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 5px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:active {
    transform: translateY(2px);
}

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

.btn-primary:hover {
    background-color: #e08b29; /* Σκούρο πορτοκαλί για hover */
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #92bce2; /* Σκούρο γαλάζιο για hover */
}

/* Animation class for script */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Header Styles --- */
#main-header {
    height: var(--header-height);
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo img {
    height: 60px; /* Ρύθμισε το ύψος του logo */
}

.nav-links {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 600;
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    width: 30px;
    height: 20px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--heading-color);
    transition: transform 0.3s ease, opacity 0.3s ease;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.mobile-menu-toggle::before, .mobile-menu-toggle::after {
    content: '';
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--heading-color);
    position: absolute;
    left: 0;
    transition: transform 0.3s ease;
}

.mobile-menu-toggle::before {
    top: 0;
}

.mobile-menu-toggle::after {
    bottom: 0;
}

/* Active state for mobile menu toggle */
.mobile-menu-toggle.active span {
    opacity: 0;
}

.mobile-menu-toggle.active::before {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active::after {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section Styles --- */
.hero-section {
    height: 100vh;
    padding-top: var(--header-height); /* Offset for header */
    background-color: var(--bg-color-alt);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-container h1 {
    font-size: 3rem;
    color: var(--gold-accent); /* Χρησιμοποιούμε το gold για highlight */
}

.hero-container p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* --- About Us Section Styles --- */
.about-section {
    padding: var(--spacing-lg) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr; /* Default for mobile */
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
}

/* --- Services Section Styles --- */
.services-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-color-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.service-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 5px solid var(--border-color); /* Προεπιλεγμένο border */
}

/* ΑΛΛΑΞΕ ΤΟ ΧΡΩΜΑ ΤΩΝ ΚΑΡΤΩΝ ΕΔΩ */
.service-card:nth-child(1) {
    border-top-color: var(--primary-color);
}

.service-card:nth-child(2) {
    border-top-color: var(--secondary-color);
}

.service-card:nth-child(3) {
    border-top-color: var(--gold-accent);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.1);
}

.service-card h3 {
    margin-bottom: var(--spacing-xs);
}

/* --- Contact Section Styles --- */
.contact-section {
    padding: var(--spacing-lg) 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr; /* Default for desktop */
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contact-form .form-group {
    margin-bottom: var(--spacing-sm);
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
}

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: var(--font-body);
}

.contact-details h3 {
    margin-top: 0;
}

.contact-details p {
    margin-bottom: var(--spacing-xs);
}

/* --- Footer Styles --- */
#main-footer {
    background-color: var(--footer-bg-color);
    color: var(--footer-text-color);
    padding: var(--spacing-md) 0;
    text-align: center;
}

/* --- Responsive Design --- */
@media (max-width: 900px) {
    .hero-container h1 {
        font-size: 2.5rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    /* Mobile Menu styles */
    .mobile-menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--white);
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        text-align: center;
        z-index: 999;
    }

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

    .nav-links li {
        margin: 0;
    }

    /* Content adjustments */
    .hero-container h1 {
        font-size: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }
}