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

body {
    font-family: "Segoe UI", sans-serif;
    background-color: var(--bg-color, #f3f4f6);
    color: var(--text-color, #111827);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

:root {
    --bg-color: #f9fafb;
    --text-color: #111827;
    --accent-color: #2563eb;
    --accent-color-dark: #1d4ed8;
    --card-bg: #ffffff;
    --secondary-accent: #f59e0b;
    --nav-bg: #f9fafb;
    --light-gray: gray;
    --dark-gray: #8ea8b3;
}

body.dark {
    --bg-color: #1f2937;
    --text-color: #f3f4f6;
    --accent-color: #3b82f6;
    --accent-color-dark: #2563eb;
    --card-bg: #374151;
    --secondary-accent: #fbbf24;
    --nav-bg: #1f2937;
    --light-gray: #a7b5d3;
    --dark-gray: #455255;
}

/* 📦 Section Layout + Scroll Animation */
.section {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

/* Entrance animation */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}