:root {
    /* Colors */
    --primary-color: #1A2B3C;
    --secondary-color: #D4E5F6;
    --background-color: #F8F8F8;
    --footer-bg-color: #0D1821;
    --button-color: #3A6EA5;
    --text-color: var(--primary-color);
    --heading-color: var(--primary-color);
    --accent-color: #A3B18A; /* Using one of the section colors as a subtle accent */

    /* Section Backgrounds */
    --section-bg-1: #F0F0F0;
    --section-bg-2: #FFFFFF;
    --section-bg-3: #D4E5F6;
    --section-bg-4: #E5E5E5;
    --section-bg-5: #CCCCCC;
    --section-bg-6: #A3B18A;

    /* Typography */
    --font-family-sans: 'Inter', sans-serif; /* Modern, clean sans-serif */
    --font-family-serif: 'Playfair Display', serif; /* Elegant, readable serif for headings */
    --base-font-size: 1.125rem; /* 18px */
    --line-height-base: 1.7;
    --line-height-heading: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;

    /* Borders & Shadows */
    --border-radius-sm: 0.375rem; /* 6px */
    --border-radius-md: 0.75rem; /* 12px */
    --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --border-glass: 1px solid rgba(255, 255, 255, 0.18);

    /* Transitions */
    --transition-speed: 0.3s;
    --transition-ease: ease-in-out;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base for rem units */
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--base-font-size);
    line-height: var(--line-height-base);
    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-serif);
    color: var(--heading-color);
    line-height: var(--line-height-heading);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.75rem; }
h3 { font-size: 2.25rem; }
h4 { font-size: 1.75rem; }
h5 { font-size: 1.5rem; }
h6 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.01em;
}

a {
    color: var(--button-color);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease),
                opacity var(--transition-speed) var(--transition-ease);
}

a:hover, a:focus {
    color: var(--accent-color);
    opacity: 0.9;
}

ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Utility Classes for Layout and Spacing (complementing Tailwind) */
.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);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-size: var(--base-font-size);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) var(--transition-ease);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-subtle);
}

.btn-primary {
    background-color: var(--button-color);
    color: var(--secondary-color);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-subtle);
}

.btn-secondary {
    background-color: transparent;
    color: var(--button-color);
    border: 2px solid var(--button-color);
}

.btn-secondary:hover {
    background-color: var(--button-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

/* Cards & Glassmorphism */
.card {
    background-color: var(--section-bg-2); /* Default white background */
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-subtle);
    padding: var(--spacing-lg);
    transition: transform var(--transition-speed) var(--transition-ease),
                box-shadow var(--transition-speed) var(--transition-ease);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.glass-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: var(--border-glass);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-glass);
    padding: var(--spacing-lg);
    transition: all var(--transition-speed) var(--transition-ease);
}

.glass-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.25);
}

/* Forms */
input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--secondary-color);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-sans);
    font-size: var(--base-font-size);
    color: var(--text-color);
    background-color: var(--section-bg-2);
    transition: border-color var(--transition-speed) var(--transition-ease),
                box-shadow var(--transition-speed) var(--transition-ease);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--button-color);
    box-shadow: 0 0 0 3px rgba(58, 110, 165, 0.2);
}

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

/* Section Backgrounds */
.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); }

/* Geometric Abstraction & Subtle Gradients (Example for a hero section or specific element) */
.hero-section-abstract {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--secondary-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero-section-abstract::before,
.hero-section-abstract::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.08); /* Subtle overlay */
    border-radius: 50%;
    filter: blur(50px);
    z-index: 0;
}

.hero-section-abstract::before {
    width: 300px;
    height: 300px;
    top: -50px;
    left: -50px;
    transform: rotate(45deg);
}

.hero-section-abstract::after {
    width: 400px;
    height: 400px;
    bottom: -100px;
    right: -100px;
    transform: rotate(-30deg);
}

.hero-section-abstract .container {
    position: relative;
    z-index: 1;
}

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

.footer a {
    color: var(--secondary-color);
    opacity: 0.8;
}

.footer a:hover {
    color: var(--accent-color);
    opacity: 1;
}

/* Media Queries for Responsiveness */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    h3 { font-size: 1.875rem; }
    .hero-section-abstract { padding: var(--spacing-lg) 0; }
}

@media (max-width: 768px) {
    :root {
        --base-font-size: 1rem; /* 16px */
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    .section-padding {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
}

/* Animations - Subtle Fade In for elements (can be applied with JS or Intersection Observer) */
@keyframes fadeInSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-slide-up {
    opacity: 0; /* Hidden by default */
    animation: fadeInSlideUp 0.8s var(--transition-ease) forwards;
}


/* 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;
    }
}