/* ========================================
   MAIN STYLESHEET - Core Styles
   Portfolio Site - Eric Hunter Petross
   ======================================== */

/* CSS Variables */
:root {
    --primary: #50C878;
    --primary-rgb: 80, 200, 120;
    --accent-black: #0b0b0b;
    --dark-gray: #1e1e1e;
    --light-contrast: #f5f5f5;
    --secondary-accent: #355E3B;
    --utility-gray: #3f3f3f;
    --highlight: #c2c2c2;
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, #0b0b0b 0%, #1e1e1e 50%, #0b0b0b 100%);
    color: var(--light-contrast);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Ambient Background Glow */
body::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, rgba(80, 200, 120, 0.15) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    z-index: -1;
    pointer-events: none;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.1); }
}

/* Container & Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--light-contrast);
}

p {
    line-height: 1.6;
    color: rgba(245, 245, 245, 0.9);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary-accent) 100%);
    color: var(--accent-black);
    box-shadow: 0 4px 15px rgba(80, 200, 120, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(80, 200, 120, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--light-contrast);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Section Spacing */
section {
    padding: 6rem 0;
    position: relative;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Loading States */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Fade In Animation */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Base */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 4rem 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    section {
        padding: 3rem 0;
    }
}