/* Base Styles & Variables */
:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #1e40af;
    --text: #1f2937;
    --text-light: #6b7280;
    --background: #f9fafb;
    --white: #ffffff;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --success: #10b981;
    --error: #ef4444;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

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

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 {
    font-size: 2.5rem;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 60px;
    height: 4px;
    background-color: var(--primary);
    border-radius: var(--radius-full);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Header & Navigation */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

.nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 2rem;
    height: 1.5rem;
}

.hamburger {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text);
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .hamburger:first-child {
    transform: translateY(0.6rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger:last-child {
    transform: translateY(-0.6rem) rotate(-45deg);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.nav-list a {
    color: var(--text);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.nav-list a:hover,
.nav-list a:focus {
    background-color: var(--gray-100);
    text-decoration: none;
    color: var(--primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: var(--space-2xl) 0;
    text-align: center;
}

.lead {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-xl);
}

/* Buttons */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.cta-button:hover,
.cta-button:focus {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: white;
    outline: none;
    border-color: var(--secondary);
}

.cta-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

/* Contact Methods */
.contact-methods {
    padding: var(--space-2xl) 0;
    background-color: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.contact-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--gray-200);
}

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

.contact-icon {
    width: 4rem;
    height: 4rem;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    font-size: 1.5rem;
}

.contact-card h3 {
    color: var(--primary);
    margin-bottom: var(--space-sm);
}

.contact-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

.contact-card a {
    color: var(--primary);
    font-weight: 500;
    word-break: break-all;
}

/* FAQ Section */
.faq {
    padding: var(--space-2xl) 0;
    background-color: var(--gray-100);
}

.faq h2 {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.faq h2::after {
    left: 50%;
    transform: translateX(-50%);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--gray-200);
}

.faq-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    color: var(--primary);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.faq-item h3::before {
    content: '•';
    color: var(--primary);
    font-size: 1.5em;
    line-height: 0;
}

.faq-item p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-color: #1e293b;
    color: white;
    padding: var(--space-2xl) 0 var(--space-md);
}

.footer a {
    color: #e2e8f0;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover,
.footer a:focus {
    color: white;
    text-decoration: underline;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand h2 {
    color: white;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: #cbd5e1;
    max-width: 300px;
}

.footer-links h3,
.footer-social h3 {
    color: white;
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    position: relative;
    display: inline-block;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-xs);
}

.social-icons {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.2s ease;
}

.social-icons a:hover,
.social-icons a:focus {
    background-color: var(--primary);
    transform: translateY(-2px);
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-md);
    text-align: center;
    color: #94a3b8;
    font-size: 0.875rem;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-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;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Responsive Design */
@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow-md);
        padding: var(--space-md);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .nav-list a {
        display: block;
        padding: var(--space-sm) var(--space-md);
        border-radius: var(--radius-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .contact-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
    }
    
    .footer-bottom {
        text-align: center;
    }
}