:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --border-color: rgba(0, 0, 0, 0.05);
    --accent-gradient: linear-gradient(45deg, #6a11cb 0%, #2575fc 100%);
    --noise-opacity: 0.03;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #ffffff;
    --card-bg: #1e1e1e;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-gradient: linear-gradient(45deg, #f3ec78, #af4261);
    --noise-opacity: 0.05;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 4rem 2rem;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
    box-sizing: border-box;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.75" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noise)" opacity="0.05"/%3E%3C/svg%3E');
    opacity: var(--noise-opacity);
    z-index: -1;
}

h1 {
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-shadow: 0 4px 15px var(--shadow-color);
}

.ad-container {
    margin: 3rem 0;
    width: 100%;
    max-width: 800px;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
    box-sizing: border-box;
    text-align: center;
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-color);
}