/* ====================================================
    CSS VARIABLES FOR LIGHT/DARK MODE
    ==================================================== */
:root {
    /* Light Theme Colors */
    --primary-color: #3498db;
    --primary-hover-color: #2980b9;
    --secondary-color: #2c3e50;
    --bg-color: #ffffff;
    --bg-secondary: #f9f9f9;
    --text-color: #333333;
    --text-secondary: #555555;
    --border-color: #e0e0e0;
    --card-bg: #ffffff;
    --footer-bg: #0b1220;
    --hero-gradient: linear-gradient(135deg, #3498db, #2c3e50);
    --shadow: 0 5px 15px rgba(0,0,0,0.05);
    --shadow-hover: 0 10px 25px rgba(0,0,0,0.1);
}

.dark-mode {
    /* Dark Theme Colors */
    --primary-color: #4da8ff;
    --primary-hover-color: #66b8ff;
    --secondary-color: #ecf0f1;
    --bg-color: #121212;
    --bg-secondary: #1a1a1a;
    --text-color: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #2d2d2d;
    --card-bg: #1e1e1e;
    --footer-bg: #0a0a0a;
    --hero-gradient: linear-gradient(135deg, #1a5276, #121212);
    --shadow: 0 5px 15px rgba(0,0,0,0.2);
    --shadow-hover: 0 10px 25px rgba(0,0,0,0.3);
}

/* ====================================================
    1. RESET AND BASE STYLES
    ==================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ====================================================
    2. UTILITY CLASSES
    ==================================================== */
.mt-30 {
    margin-top: 30px;
}