:root {
    /* Colors */
    --color-primary: #0F52BA; /* Deep Blue */
    --color-secondary: #40B4BA; /* Teal Blue */
    --color-background: #E0FFFF; /* Light Cyan */
    --color-footer-bg: #1A3A54; /* Dark Blue Gray */
    --color-button: #0F52BA; /* Deep Blue */
    --color-text-dark: #1A3A54;
    --color-text-light: #F0F8FF; /* Alice Blue for light text */
    --color-glass-light: rgba(255, 255, 255, 0.2);
    --color-glass-border: rgba(255, 255, 255, 0.3);
    --color-glass-shadow: rgba(0, 0, 0, 0.1);

    /* Section Backgrounds */
    --section-bg-1: #E0FFFF; /* Light Cyan */
    --section-bg-2: #B0E0E6; /* Powder Blue */
    --section-bg-3: #87CEEB; /* Sky Blue */
    --section-bg-4: #6495ED; /* Cornflower Blue */
    --section-bg-5: #4682B4; /* Steel Blue */
    --section-bg-6: #DDF0F0; /* Very light blue-green */

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --font-size-base: 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;
    --spacing-xxl: 6rem;

    /* Border Radii */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;

    /* Shadows */
    --shadow-button: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-card: 0 8px 32px 0 var(--color-glass-shadow);
    --shadow-card-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-header: 0 4px 8px rgba(0, 0, 0, 0.1); /* For header on scroll */

    /* Transitions */
    --transition-smooth: all 0.3s ease-in-out;
    --transition-fast: all 0.2s ease-out;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: var(--line-height-heading);
    color: var(--color-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

h1 { font-size: 3.5rem; letter-spacing: -0.05em; } /* 56px */
h2 { font-size: 2.75rem; letter-spacing: -0.04em; } /* 44px */
h3 { font-size: 2rem; letter-spacing: -0.03em; } /* 32px */
h4 { font-size: 1.5rem; letter-spacing: -0.02em; } /* 24px */
h5 { font-size: 1.25rem; } /* 20px */
h6 { font-size: 1rem; } /* 16px */

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

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

/* 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); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm); /* Rounded rectangular */
    background-color: var(--color-button);
    color: var(--color-text-light);
    font-family: var(--font-heading);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-button); /* Subtle shadow */
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.15); /* Subtle glassy texture */
    border-radius: 50%;
    transition: width 0.4s ease, height 0.4s ease, transform 0.4s ease;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.btn:hover {
    transform: translateY(-2px) scale(1.02); /* Slightly scales and moves up */
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15), 0 2px 6px rgba(0, 0, 0, 0.1); /* Enhanced shadow */
}

.btn:hover:before {
    width: 200%;
    height: 200%;
    opacity: 0; /* Simulates a subtle glow by fading out the glassy texture */
}

.btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Card Style (Glassmorphism) */
.card {
    background: var(--color-glass-light); /* Light, translucent background */
    backdrop-filter: blur(10px); /* Glassy blur */
    -webkit-backdrop-filter: blur(10px); /* Safari support */
    border: 1px solid var(--color-glass-border); /* Translucent border */
    border-radius: var(--border-radius-md); /* Slightly rounded corners */
    box-shadow: var(--shadow-card); /* Outer shadow */
    padding: var(--spacing-lg);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden; /* For potential inner glow effects */
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 48px 0 var(--color-glass-shadow), var(--shadow-card-inner); /* Enhanced shadow with inner shadow */
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: transparent; /* Transparent by default */
    padding: var(--spacing-sm) var(--spacing-xl);
    z-index: 1000;
    transition: var(--transition-smooth);
    border-bottom: 1px solid transparent; /* Subtle bottom border */
}

.header.scrolled {
    background-color: rgba(15, 82, 186, 0.9); /* Solid, slightly darker shade of primary blue */
    box-shadow: var(--shadow-header); /* Subtle bottom border shadow */
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.header .nav-link {
    color: var(--color-text-light); /* Light text for header links */
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: var(--transition-smooth);
    position: relative;
}

.header .nav-link:hover {
    color: var(--color-secondary);
    transform: translateY(-2px);
}

.header .nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -5px;
    width: 0;
    height: 2px;
    background-color: var(--color-secondary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.header .nav-link:hover::after {
    width: 80%;
}

/* Footer */
.footer {
    background-color: var(--color-footer-bg);
    color: var(--color-text-light);
    padding: var(--spacing-xl) var(--spacing-xl);
    font-size: 0.9rem;
}

.footer h4 {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.footer a {
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

.footer a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

.footer .social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    margin: 0 var(--spacing-xs);
    transition: var(--transition-smooth);
    color: var(--color-text-light);
}

.footer .social-icon:hover {
    background-color: var(--color-secondary);
    box-shadow: 0 0 15px var(--color-secondary); /* Subtle glow */
    transform: translateY(-3px) scale(1.05);
}

/* Utility Classes (to complement Tailwind) */
.container {
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

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

.text-center {
    text-align: center;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    h3 { font-size: 1.75rem; }
    .section-padding {
        padding-top: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    body { font-size: 1rem; }
    .header {
        padding: var(--spacing-sm);
    }
    .footer {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    .section-padding {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 1rem;
    }
    .card {
        padding: var(--spacing-md);
    }
}


/* 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;
    }
}