/* ====================================================== */
/* --- BIẾN MÀU VÀ THIẾT LẬP CHUNG --- */
/* ====================================================== */
:root {
    /* Bảng màu mới */
    --bg-dark: #121212;
    --bg-card: rgba(28, 28, 31, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --gradient-purple: #c084fc;
    --gradient-pink: #f472b6;
    --gradient-green: #4ade80;
    --gradient-yellow: #facc15;
    --resume-button-bg: var(--gradient-green);
}

/* === BỔ SUNG: BIẾN MÀU CHO LIGHT MODE === */
body.light-mode {
    background-color: var(--bg-dark); /* Explicitly set background */
    --bg-dark: #f5f5f5;
    --bg-card: rgba(255, 255, 255, 0.8);
    --border-color: rgba(0, 0, 0, 0.1);
    --text-primary: #212121;
    --text-secondary: #5f5f5f;
    --resume-button-bg: #18181b;
    /* Nút resume nền đen chữ trắng */
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    /* Font mới */
    font-family: 'Sora', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--gradient-purple);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Helper class cho hiệu ứng kính mờ */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}