:root {
    /* Colors */
    --primary-color: #2F4F4F; /* Dark Slate Gray */
    --secondary-color: #8FBC8F; /* Dark Sea Green */
    --background-color: #F0FFF0; /* Honeydew */
    --footer-bg-color: #1A2B3C; /* Darker Blue-Gray */
    --button-color: #4682B4; /* Steel Blue */
    --text-color: #333333;
    --light-text-color: #F0FFF0; /* Honeydew for dark backgrounds */
    --accent-color: #C0D0C0; /* Light Grayish Green */

    /* Section Backgrounds */
    --section-bg-1: #F0FFF0;
    --section-bg-2: #E0EEE0;
    --section-bg-3: #D0E0D0;
    --section-bg-4: #C0D0C0;
    --section-bg-5: #B0C0B0;
    --section-bg-6: #A0B0A0;

    /* Typography */
    --font-family-headings: 'Merriweather', serif; /* Elegant serif */
    --font-family-body: 'Open Sans', sans-serif; /* Clean sans-serif */
    --base-font-size: 18px;
    --line-height: 1.7;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 96px;

    /* Borders & Shadows */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --shadow-subtle: 0 4px 8px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 8px 16px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-duration: 0.3s;
    --transition-timing-function: ease-in-out;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-body);
    font-size: var(--base-font-size);
    line-height: var(--line-height);
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-headings);
    color: var(--primary-color);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5em; /* 56px */
    font-weight: 700;
}

h2 {
    font-size: 2.5em; /* 40px */
    font-weight: 600;
}

h3 {
    font-size: 1.8em; /* 28.8px */
    font-weight: 600;
}

p {
    margin-bottom: 1em;
}

a {
    color: var(--button-color);
    text-decoration: none;
    transition: color var(--transition-duration) var(--transition-timing-function);
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Utility Classes for Layout and Spacing */
.container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.section-padding {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.section-padding-lg {
    padding-top: calc(var(--spacing-xl) * 1.5);
    padding-bottom: calc(var(--spacing-xl) * 1.5);
}

/* Section Backgrounds - For visual separation and natural feel */
.section-bg-1 { background-color: var(--section-bg-1); }
.section-bg-2 { background-color: var(--section-bg-2); }
.section-bg-3 { background-color: var(--section-bg-3); }
.section-bg-4 { background-color: var(--section-bg-4); }
.section-bg-5 { background-color: var(--section-bg-5); }
.section-bg-6 { background-color: var(--section-bg-6); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-body);
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-duration) var(--transition-timing-function);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-subtle);
}

.btn-primary {
    background-color: var(--button-color);
    color: var(--light-text-color);
    border-color: var(--button-color);
}

.btn-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background-color: transparent;
    color: var(--button-color);
    border-color: var(--button-color);
}

.btn-secondary:hover {
    background-color: var(--button-color);
    color: var(--light-text-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Cards - Clean lines, subtle shadow */
.card {
    background-color: #ffffff;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-subtle);
    padding: var(--spacing-lg);
    transition: transform var(--transition-duration) var(--transition-timing-function), box-shadow var(--transition-duration) var(--transition-timing-function);
    border: 1px solid var(--section-bg-2); /* Subtle border for definition */
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

/* Forms - Natural and clean inputs */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--accent-color);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-body);
    font-size: 1em;
    color: var(--text-color);
    background-color: #ffffff;
    transition: border-color var(--transition-duration) var(--transition-timing-function), box-shadow var(--transition-duration) var(--transition-timing-function);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--button-color);
    box-shadow: 0 0 0 3px rgba(70, 130, 180, 0.2); /* Steel Blue with transparency */
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer - Distinct and elegant */
.footer {
    background-color: var(--footer-bg-color);
    color: var(--light-text-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer a {
    color: var(--secondary-color);
    margin: 0 var(--spacing-sm);
}

.footer a:hover {
    color: var(--button-color);
    text-decoration: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5em; /* 40px */
    }

    h2 {
        font-size: 1.8em; /* 28.8px */
    }

    h3 {
        font-size: 1.4em; /* 22.4px */
    }

    .section-padding {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }

    .section-padding-lg {
        padding-top: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }

    .container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2em; /* 32px */
    }

    h2 {
        font-size: 1.5em; /* 24px */
    }

    .btn {
        width: 100%;
        padding: var(--spacing-sm);
    }
}

/* Animation for element fade-in on scroll (requires JS to trigger classes) */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--transition-timing-function), transform 0.6s var(--transition-timing-function);
}

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

/* Specific styles for 'Ελληνικά' (Greek) text if needed - adjust font weights, etc. for better rendering */
body[lang="el"] {
    /* Potential adjustments for Greek characters if the chosen fonts don't render them well */
    /* Example: font-weight: 400 for body, slightly higher for headings */
}


/* Cookie Banner Additional Styles for Tailwind */
.cookie-banner-hover-effect:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (prefers-reduced-motion: reduce) {
    .cookie-banner-hover-effect:hover {
        transform: none;
    }
}