/* 
 * WhyTigr Enterprises - Core Stylesheet
 * Aesthetic: Minimalist Corporate
 */

:root {
    --bg-color: #ffffff;
    --section-bg: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --accent-color: #2563eb; /* Professional Blue */
    --accent-hover: #1d4ed8;
    --border-color: #e5e7eb;
    --max-width: 1100px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

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

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

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

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
}

.section-alt {
    background-color: var(--section-bg);
}

/* Header & Nav */
header {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.logo span {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

/* Typography */
h1, h2, h3 {
    margin-bottom: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Footer */
footer {
    background: #fff;
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Grid Components */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: #fff;
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 0.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    .nav-links { gap: 1rem; }
}