/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Open+Sans:wght@300;400&display=swap');

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #1A365D;
    --color-secondary: #2A9D8F;
    --color-background: #F3F4F6;
    --color-accent: #E76F51;
    --color-accent-secondary: #84A98C;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #FFFFFF;

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Container */
    --container-width: 1200px;
    --container-padding: 1rem;
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Navigation */
.nav {
    background-color: var(--color-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav__logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-primary);
    text-decoration: none;
}

.nav__menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav__link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav__link:hover {
    color: var(--color-secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn--primary:hover {
    background-color: #d45a3d;
}

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

.btn--secondary:hover {
    background-color: #238b7f;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-primary);
    color: var(--color-white);
    margin-top: 80px;
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero__title {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.hero__subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

/* Cards */
.card {
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-lg);
    transition: transform 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
}

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

.card p {
    flex-grow: 1;
}

.card .btn {
    margin-top: var(--spacing-md);
    align-self: flex-start;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid--2-cols { grid-template-columns: repeat(2, 1fr); }
.grid--3-cols { grid-template-columns: repeat(3, 1fr); }
.grid--4-cols { grid-template-columns: repeat(4, 1fr); }

/* Responsive Design */
@media (max-width: 1024px) {
    .grid--4-cols { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .grid--3-cols,
    .grid--4-cols { grid-template-columns: repeat(2, 1fr); }
    
    .nav__menu {
        display: none;
    }
}

@media (max-width: 480px) {
    .grid--2-cols,
    .grid--3-cols,
    .grid--4-cols { grid-template-columns: 1fr; }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.section:nth-child(even) {
    background-color: var(--color-white);
}

.section ul {
    margin-top: var(--spacing-md);
}

.section ul li {
    margin-bottom: var(--spacing-sm);
}

/* Footer Styles */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

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

.footer ul {
    list-style: none;
    padding: 0;
}

.footer ul li {
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer a:hover {
    opacity: 1;
}

.footer p {
    opacity: 0.8;
}

.footer .text-center {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* List Styles */
ul {
    list-style-position: inside;
    margin-bottom: var(--spacing-md);
}

ul li {
    list-style-type: none;
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-md);
}

ul li::before {
    content: "•";
    color: var(--color-secondary);
    position: absolute;
    left: 0;
}

/* Text Styles */
.text-muted {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-form input[type="email"] {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-text-light);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
}

.newsletter-form input[type="email"]:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.newsletter-form button {
    white-space: nowrap;
}

@media (max-width: 768px) {
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
}