:root {
    --bg-color: #fff;
    --text-color: #333;
    --nav-bg-color: rgba(255, 255, 255, 0.95);
    --border-color: rgba(0, 0, 0, 0.1);
    --hover-color: #666;
    --clock-bg: #e0e0e0;
    --clock-fill: #b3b3b3;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #f5f5f5;
    --nav-bg-color: rgba(26, 26, 26, 0.95);
    --border-color: rgba(255, 255, 255, 0.1);
    --hover-color: #ccc;
    --clock-bg: #333;
    --clock-fill: #555;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Added to prevent all scrolling --- */
html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Comfortaa', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.nav-menu a {
    font-family: 'Comfortaa', sans-serif;
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

/* Navbar Styles */
.navbar {
    position: fixed;
    width: 100%;
    top: 0;
    background-color: var(--nav-bg-color);
    padding: 2rem 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-bottom 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    position: relative;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    letter-spacing: 2px;
    z-index: 1002;
}

.logo a {
    text-decoration: none;
    color: inherit;
}

.menu-toggle {
    display: none;
    cursor: pointer;
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    padding: 10px;
    width: 45px;
    height: 45px;
    align-items: center;
    justify-content: center;
}

.hamburger {
    width: 25px;
    height: 25px;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    transition: transform 0.3s ease, background-color 0.3s ease;
    left: 0;
}

.hamburger::before {
    transform: translateY(-6px);
}

.hamburger::after {
    transform: translateY(6px);
}

.hamburger.active::before {
    transform: translateY(0) rotate(45deg);
}

.hamburger.active::after {
    transform: translateY(0) rotate(-45deg);
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-menu a:hover {
    color: var(--hover-color);
}

/* Dark mode toggle button styles */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    transition: color 0.3s ease;
    padding: 0;
    margin-left: auto;
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    /* Ensure icons are stacked */
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--hover-color);
}


/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        right: 2rem;
        left: auto;
    }

    .theme-toggle {
        left: 2rem;
        right: auto;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--bg-color);
        padding: 6rem 2rem;
        transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.5s ease, visibility 0.5s ease;
        opacity: 0;
        visibility: hidden;
        transform: translateX(-100%);
        will-change: transform, opacity, visibility;
        backface-visibility: hidden;
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu ul {
        display: flex;
        flex-direction: column;
        list-style: none;
        gap: 5.5rem;
        align-items: center;
        justify-content: center;
        height: 100%;
    }

    .nav-menu.active li {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-menu li {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease, transform 0.4s ease;
        transition-delay: 0s;
    }

    .nav-menu.active li:nth-child(2) {
        transition-delay: 0.2s;
    }

    .nav-menu.active li:nth-child(3) {
        transition-delay: 0.3s;
    }

    .nav-menu a {
        font-size: 1.2rem;
    }
}