:root {
    --bg: #fafbff;
    --text: #232733;
    --primary: #1a8cff;
    --accent: #ffb300;
    --nav-bg: #f5f6fa;
    --footer-bg: #222;
    --footer-text: #fff;
}
body {
    background: var(--bg);
    color: var(--text);
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    transition: background 0.2s, color 0.2s;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--nav-bg);
    padding: 1rem 2rem;
    box-shadow: 0 2px 6px #0001;
}
.logo a {
    color: var(--primary);
    font-weight: bold;
    font-size: 1.6rem;
    letter-spacing: 1px;
    text-decoration: none;
}
nav a {
    margin: 0 1.1rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}
nav a:hover, nav a.active {
    color: var(--accent);
}
main {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 1rem;
}
footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 1.2rem;
    margin-top: 3rem;
    font-size: 1rem;
    letter-spacing: 0.5px;
}
#darkModeToggle {
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--text);
}
/* Dark Mode */
body.dark {
    --bg: #181c24;
    --text: #e1e4ea;
    --nav-bg: #232733;
    --footer-bg: #15171c;
    --footer-text: #aaa;
    --primary: #ffb300;
}
@media (max-width: 900px) {
    header { flex-direction: column; align-items: flex-start; }
    nav { margin-top: 1rem; }
    main { padding: 0.5rem; }
}
@media (max-width: 600px) {
    .logo { font-size: 1.1rem; }
    nav a { margin: 0 0.5rem; font-size: 0.98rem;}
    main { padding: 0.3rem; }
}