:root {
    /* Dark Theme (Default) */
    --bg-color: #1a1a1a;
    --container-bg: linear-gradient(145deg, #2b2b2b, #1e1e1e);
    --text-color: #e0e0e0;
    --header-text: #fff;
    --sub-text: #a0a0a0;
    --box-shadow-1: rgba(0, 0, 0, 0.7);
    --box-shadow-2: rgba(255, 255, 255, 0.05);
    --accent-color: #00aaff;
    --bg-pattern-opacity: 0.1;
}

[data-theme="light"] {
    /* Light Theme */
    --bg-color: #f0f2f5;
    --container-bg: linear-gradient(145deg, #ffffff, #e6e6e6);
    --text-color: #333;
    --header-text: #222;
    --sub-text: #666;
    --box-shadow-1: rgba(0, 0, 0, 0.1);
    --box-shadow-2: rgba(255, 255, 255, 0.8);
    --accent-color: #0077cc;
    --bg-pattern-opacity: 0.05;
}

body {
    font-family: 'Orbitron', sans-serif;
    background-color: var(--bg-color);
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23333333' fill-opacity='var(--bg-pattern-opacity)' fill-rule='evenodd'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background: var(--container-bg);
    padding: 40px 60px;
    border-radius: 25px;
    box-shadow:
      10px 10px 30px var(--box-shadow-1),
      -10px -10px 30px var(--box-shadow-2);
    text-align: center;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header h1 {
    font-size: 2.5rem;
    color: var(--header-text);
    text-shadow: 0 0 10px var(--accent-color), 0 0 20px var(--accent-color);
    margin-bottom: 10px;
}

.header p {
    font-size: 1rem;
    color: var(--sub-text);
    margin-bottom: 40px;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}

.theme-btn {
    background: var(--container-bg);
    border: 1px solid var(--accent-color);
    color: var(--text-color);
    padding: 10px 15px;
    border-radius: 10px;
    cursor: pointer;
    font-family: 'Orbitron', sans-serif;
    box-shadow: 2px 2px 5px var(--box-shadow-1);
    transition: all 0.3s ease;
}

.theme-btn:hover {
    box-shadow: 0 0 10px var(--accent-color);
}

.numbers-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 50px;
    min-height: 80px;
}

.number {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.5s ease-out forwards;
}

/* Staggered animation for each number */
.number:nth-child(1) { animation-delay: 0.1s; }
.number:nth-child(2) { animation-delay: 0.2s; }
.number:nth-child(3) { animation-delay: 0.3s; }
.number:nth-child(4) { animation-delay: 0.4s; }
.number:nth-child(5) { animation-delay: 0.5s; }
.number:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.glowing-btn {
    position: relative;
    color: var(--accent-color);
    cursor: pointer;
    padding: 15px 35px;
    border: none;
    background: none;
    font-size: 1.5rem;
    font-family: 'Orbitron', sans-serif;
}

.glowing-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    border-radius: 15px;
    filter: blur(20px);
    opacity: 0.7;
    transition: opacity 0.3s;
}

.glowing-btn:hover::before {
    opacity: 1;
}

.glowing-txt {
    position: relative;
    z-index: 1;
    color: #fff;
    text-shadow: 0 0 5px var(--accent-color);
}