:root {
    --bg-gradient-start: #4facfe;
    --bg-gradient-end: #00f2fe;
    --text-color: white;
    --ball-bg: white;
    --ball-text: black;
    --btn-bg: #ffcc00;
    --btn-hover: #ffdd33;
    --toggle-bg: #333;
    --toggle-text: white;
}

[data-theme="dark"] {
    --bg-gradient-start: #1a1a2e;
    --bg-gradient-end: #16213e;
    --text-color: #e94560;
    --ball-bg: #0f3460;
    --ball-text: white;
    --btn-bg: #e94560;
    --btn-hover: #ff4d6d;
    --toggle-bg: white;
    --toggle-text: #1a1a2e;
}

body {
    font-family: 'Arial', sans-serif;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    transition: background 0.5s ease, color 0.5s ease;
}

.container {
    padding-top: 100px;
}

h1 {
    font-size: 40px;
}

.numbers {
    margin: 30px 0;
    min-height: 80px;
}

.ball {
    display: inline-block;
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    background: var(--ball-bg);
    color: var(--ball-text);
    font-weight: bold;
    font-size: 22px;
    margin: 10px;
    transition: transform 0.3s ease, background 0.5s ease, color 0.5s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.ball.show {
    transform: scale(1.2);
}

button {
    padding: 12px 25px;
    font-size: 18px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    background: var(--btn-bg);
    color: black;
    font-weight: bold;
    transition: background 0.3s ease;
    margin: 10px;
}

button:hover {
    background: var(--btn-hover);
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background: var(--toggle-bg);
    color: var(--toggle-text);
}

.contact-section {
    margin-top: 50px;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    backdrop-filter: blur(5px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: var(--ball-bg);
    color: var(--ball-text);
    box-sizing: border-box;
    font-size: 16px;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.submit-btn {
    background: var(--btn-bg) !important;
    margin: 0 !important;
}

.submit-btn:hover {
    background: var(--btn-hover) !important;
}

.comments-section {
    margin-top: 50px;
    padding: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    margin-bottom: 50px;
}