* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    height: 100vh;
    overflow: hidden;
}

#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.container {
    position: relative;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.content {
    text-align: center;
    z-index: 1;
    animation: fadeIn 1.5s ease-in;
}

.title {
    font-size: 5rem;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    margin-bottom: 1rem;
    letter-spacing: 2px;
    animation: slideDown 1s ease-out;
    cursor: pointer;
    transition: transform 0.3s ease, text-shadow 0.3s ease, letter-spacing 0.3s ease;
}

.title:hover {
    transform: scale(1.05) translateY(-5px);
    text-shadow: 0 8px 30px rgba(102, 126, 234, 0.6), 0 4px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: 4px;
}

.subtitle {
    font-size: 2rem;
    font-weight: 300;
    color: #f0f0f0;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    letter-spacing: 4px;
    text-transform: uppercase;
    animation: slideUp 1s ease-out;
    cursor: pointer;
    transition: transform 0.3s ease, color 0.3s ease, letter-spacing 0.3s ease;
}

.subtitle:hover {
    transform: scale(1.03);
    color: #ffffff;
    letter-spacing: 6px;
    text-shadow: 0 4px 15px rgba(240, 147, 251, 0.6), 0 2px 10px rgba(0, 0, 0, 0.2);
}

.loader {
    margin: 3rem auto 0;
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes clickPulse {
    0% { transform: scale(1); }
    50% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

@keyframes clickGlow {
    0% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
    100% { filter: brightness(1); }
}

.click-animation {
    animation: clickPulse 0.3s ease, clickGlow 0.3s ease;
}

@media (max-width: 768px) {
    .title {
        font-size: 3rem;
    }
    
    .subtitle {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
        letter-spacing: 2px;
    }
}

/* Accessibility: Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .container {
        animation: none;
    }
    
    .container::before {
        animation: none;
    }
    
    .title, .subtitle, .content, .loader {
        animation: none;
    }
}