:root {
    /* Colors */
    --primary-color: #007BFF;
    --secondary-color: #17A2B8;
    --background-color: #F0F8FF;
    --footer-bg-color: #004085;
    --button-color: #28A745;
    --text-color: #333333;
    --light-text-color: #F0F8FF; /* For dark backgrounds */
    --accent-color: #FFD700; /* A vibrant tropical accent */

    /* Section Backgrounds - Inspired by tropical waters */
    --section-bg-1: #E0F7FA; /* Lightest */
    --section-bg-2: #B2EBF2;
    --section-bg-3: #80DEEA;
    --section-bg-4: #4DD0E1;
    --section-bg-5: #26C6DA;
    --section-bg-6: #00BCD4; /* Darkest */

    /* Typography */
    --font-family-heading: 'Poppins', sans-serif;
    --font-family-body: 'Open Sans', sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.7;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Borders & Shadows */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    --glass-border: 1px solid rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --hover-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);

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

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

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    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-heading);
    color: var(--primary-color);
    line-height: 1.2;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em; /* Subtle tightening for headings */
}

h1 { font-size: 3.5rem; font-weight: 700; }
h2 { font-size: 2.5rem; font-weight: 600; }
h3 { font-size: 1.8rem; font-weight: 600; }
h4 { font-size: 1.4rem; font-weight: 500; }
h5 { font-size: 1.2rem; font-weight: 500; }
h6 { font-size: 1rem; font-weight: 500; }

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

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-easing), text-shadow var(--transition-speed) var(--transition-easing);
}

a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px rgba(0, 123, 255, 0.3);
}

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

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden; /* For wave effects */
}

/* 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-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-heading);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    border: none;
    outline: none;
    transition: all var(--transition-speed) var(--transition-easing);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background-color: var(--button-color);
    color: var(--light-text-color);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.btn-primary:hover {
    background-color: #218838; /* Darker green */
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(40, 167, 69, 0.6);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--light-text-color);
    box-shadow: 0 6px 20px rgba(23, 162, 184, 0.4);
}

.btn-secondary:hover {
    background-color: #138496; /* Darker secondary */
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(23, 162, 184, 0.6);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: none;
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.3);
}

/* Cards - Glassmorphism style */
.card {
    background: rgba(255, 255, 255, 0.15); /* Slightly opaque white for glass effect */
    border-radius: var(--border-radius-md);
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(10px); /* The magic of glassmorphism */
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-speed) var(--transition-easing), box-shadow var(--transition-speed) var(--transition-easing);
}

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

/* Forms */
input[type="text"],
input[type="email"],
input[type="password"],
textarea {
    width: 100%;
    padding: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(0, 123, 255, 0.3); /* Lighter primary color border */
    border-radius: var(--border-radius-sm);
    background-color: rgba(255, 255, 255, 0.7); /* Semi-transparent white */
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    color: var(--text-color);
    transition: all var(--transition-speed) var(--transition-easing);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
    outline: none;
    background-color: var(--light-text-color);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--footer-bg-color);
    color: var(--light-text-color);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 5px solid var(--secondary-color); /* A stark line like the ocean horizon */
}

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

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

.footer a:hover {
    color: var(--light-text-color);
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

/* Specific Glassmorphism for Navbar/Header (if applicable) */
.navbar, .header-glass {
    background: rgba(255, 255, 255, 0.1); /* Very light glass for header */
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar a {
    color: var(--primary-color);
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

.navbar a:hover {
    background-color: rgba(0, 123, 255, 0.1);
    color: var(--secondary-color);
}

/* Animation: Subtle Wave Effect for sections (optional, but enhances underwater feel) */
@keyframes wave {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.section-with-wave {
    background-size: 200% 200%;
    animation: wave 15s ease infinite;
    /* Example gradient, adjust as needed for specific sections */
    background-image: linear-gradient(135deg, var(--section-bg-1) 0%, var(--section-bg-3) 50%, var(--section-bg-5) 100%);
}

/* Media Queries for Responsiveness */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    .section {
        padding: var(--spacing-lg) 0;
    }
    .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .section {
        padding: var(--spacing-md) 0;
    }
    .container {
        padding-left: var(--spacing-xs);
        padding-right: var(--spacing-xs);
    }
}

/* Scrollbar styling for a custom look */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 5px;
    transition: background var(--transition-speed) var(--transition-easing);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}


/* 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;
    }
}