:root {
    --primary-color: #0f172a; /* Deep Navy Blue */
    --secondary-color: #3b82f6; /* Vibrant Blue */
    --accent-color: #10b981; /* Green */
    --background-color: #f8fafc; /* Off-white */
    --surface-color: #ffffff; /* White */
    --text-color: #334155; /* Slate 700 */
    --text-light: #64748b; /* Slate 500 */
    --border-color: #e2e8f0; /* Slate 200 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary-color);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; letter-spacing: -0.025em; }
h2 { font-size: 2rem; letter-spacing: -0.025em; margin-top: 3rem; }
h3 { font-size: 1.5rem; margin-top: 2rem; }

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

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(to bottom right, var(--primary-color), #1e293b);
    color: var(--surface-color);
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    color: var(--surface-color);
    margin-bottom: 1.5rem;
    font-size: 3.5rem;
}

.hero p {
    font-size: 1.25rem;
    color: #cbd5e1;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--surface-color);
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: background-color 0.2s, transform 0.1s;
}

.cta-button:hover {
    background-color: #059669;
    color: white;
    transform: translateY(-1px);
}

/* Comparison Table */
.table-container {
    overflow-x: auto;
    margin: 3rem 0;
    background: var(--surface-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: var(--primary-color);
    position: sticky;
    top: 0;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background-color: #f8fafc;
}

.check-icon { color: var(--accent-color); }
.cross-icon { color: #ef4444; }

/* Provider Cards */
.provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.provider-card {
    background: var(--surface-color);
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.provider-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.provider-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1.5rem;
}

.provider-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.provider-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.provider-features {
    list-style: none;
    margin: 1.5rem 0;
}

.provider-features li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.provider-features li::before {
    content: "✓";
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: #94a3b8;
    padding: 4rem 0;
    margin-top: 6rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.footer-col h4 {
    color: var(--surface-color);
    margin-bottom: 1.5rem;
}

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

.footer-col li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: #94a3b8;
}

.footer-col a:hover {
    color: var(--surface-color);
}

.copyright {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #334155;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav-links { display: none; } /* Simple mobile hide for now */
    .provider-grid { grid-template-columns: 1fr; }
}