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

html {
    height: 100%;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: white;
    color: #000;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    position: relative;
    margin: 0;
    padding: 0;
}

/* Center logo positioning */
.logo-center {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.occurrence-logo {
    width: 35vw;
    max-width: 500px;
    min-width: 280px;
    height: auto;
    transition: filter 0.3s ease, transform 0.3s ease;
}

/* Bottom center logo */
.logo-bottom-center {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
}

.coom-logo {
    max-width: 200px;
    width: 40vw;
    height: auto;
    padding: 20px;
    transition: filter 0.3s ease, transform 0.3s ease;
}

/* Bottom left logo */
.logo-bottom-left {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 5;
}

.felix-logo {
    max-width: 150px;
    width: 30vw;
    height: auto;
    padding: 20px;
    transition: filter 0.3s ease, transform 0.3s ease;
}

/* Dark mode styles */
body.dark-mode {
    background-color: #000;
    color: #fff;
}

/* Background opacity for subtle effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('static/img/bg.svg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.1;
    z-index: -1;
    transition: opacity 0.3s ease;
}

body.dark-mode::before {
    opacity: 0.05;
    filter: invert(1);
}

/* Dark mode SVG inversion */
body.dark-mode .coom-logo,
body.dark-mode .felix-logo {
    filter: invert(1);
}

/* Occurrence logo - selective inversion using CSS filters */
body.dark-mode .occurrence-logo {
    filter: invert(1) hue-rotate(180deg) brightness(1.1) contrast(0.9);
}

/* Hover effects */
.occurrence-logo:hover {
    transform: scale(1.05);
}

.coom-logo:hover,
.felix-logo:hover {
    transform: scale(1.1);
}

/* Loading animation - initial state */
.logo-center,
.logo-bottom-center,
.logo-bottom-left {
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Specific animations for each logo to maintain positioning */
.logo-center {
    animation: fadeInCenter 0.8s ease forwards;
}

.logo-bottom-center {
    animation: fadeInBottomCenter 0.8s ease forwards 0.2s;
}

.logo-bottom-left {
    animation: fadeInBottomLeft 0.8s ease forwards 0.4s;
}

@keyframes fadeInCenter {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

@keyframes fadeInBottomCenter {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%);
    }
}

@keyframes fadeInBottomLeft {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .occurrence-logo {
        width: 45vw;
        max-width: 350px;
        min-width: 250px;
    }
    
    .coom-logo {
        max-width: 150px;
        width: 50vw;
        padding: 15px;
    }
    
    .felix-logo {
        max-width: 120px;
        width: 40vw;
        padding: 15px;
    }
    
    .logo-bottom-center {
        bottom: 25px;
    }
    
    .logo-bottom-left {
        bottom: 25px;
        left: 25px;
    }
}

@media (max-width: 480px) {
    .occurrence-logo {
        width: 55vw;
        max-width: 280px;
        min-width: 200px;
    }
    
    .coom-logo {
        max-width: 120px;
        width: 60vw;
        padding: 10px;
    }
    
    .felix-logo {
        max-width: 100px;
        width: 50vw;
        padding: 10px;
    }
    
    .logo-bottom-center {
        bottom: 20px;
    }
    
    .logo-bottom-left {
        bottom: 20px;
        left: 20px;
    }
}

/* Theme indicator */
.theme-indicator {
    position: fixed;
    top: 10px;
    right: 10px;
    font-size: 12px;
    opacity: 0.3;
    pointer-events: none;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

/* Smooth transitions for theme changes */
body, .occurrence-logo, .coom-logo, .felix-logo {
    transition: all 0.3s ease;
}