:root {
    --primary-color: #2ca1b6;
    --secondary-color: #ffffff;
    --font-sans: 'Inter', sans-serif;
    --font-future: 'Rajdhani', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: #000;
    color: #fff;
    overflow: hidden; /* Desktop focus, no scroll */
}

.hero-container {
    position: relative;
    height: 100vh;
    width: 100%;
    background-image: url("https://health.surfwiser.com/2026/02/Project%20Entropia/WM_02952V01_1920_EN_DJ_20260210_FP_AI%5E%E9%BB%84%E8%89%B2%E6%96%97%E7%AF%B7%E5%A5%B3%E5%AD%A9.jpg");
    background-size: cover;
    background-position: center;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* Gradient overlay to darken edges and make text pop, while keeping center clear */
    background: linear-gradient(to right, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.6) 100%);
    z-index: 0;
}

.logo-container {
    position: absolute;
    top: 1%;
    left: 2%;
    z-index: 20;
}

.top-left-content {
    position: absolute;
    top: 30%;
    left: 2%;
    z-index: 10;
}

.logo {
    width: 22rem;
}

.main-title {
    font-size: 4.5rem;
    font-weight: 900;
    text-transform: uppercase;
    line-height: 1.05;
    letter-spacing: -0.02em;
    text-shadow: 4px 4px 0px rgba(44, 161, 182, 0.8), -2px -2px 0px rgba(255, 255, 255, 0.3);
}

.center-bottom-container {
    position: absolute;
    bottom: 5%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.sub-text {
    font-family: var(--font-future);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    line-height: 1.4;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.9), 0px 0px 8px rgba(44, 161, 182, 0.5);
    margin-bottom: 2rem;
}

.highlight {
    color: var(--primary-color);
}

.cta-button {
    position: relative;
    padding: 1.2rem 4rem;
    font-family: var(--font-sans);
    font-weight: 900;
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.2s ease;
    /* Color switching animation */
    animation: color-switch 1s infinite alternate;
}

.cta-button:hover {
    transform: scale(1.05);
    animation-duration: 0.5s; /* Speeds up on hover */
    filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.6));
}

.cta-text {
    position: relative;
    z-index: 10;
}

@keyframes color-switch {
    0% { 
        background-color: var(--primary-color); 
        color: #ffffff;
        box-shadow: 0 0 20px rgba(44, 161, 182, 0.6), inset 0 0 10px rgba(255,255,255,0.2); 
    }
    100% { 
        background-color: #ffffff; 
        color: var(--primary-color);
        box-shadow: 0 0 40px rgba(255, 255, 255, 0.8), inset 0 0 20px rgba(44, 161, 182, 0.2); 
    }
}

/* Responsive adjustments for smaller desktop screens */
@media (max-width: 1440px) {
    .main-title {
        font-size: 3.8rem;
    }
    .logo {
        width: 18rem;
    }
    .sub-text {
        font-size: 1.5rem;
    }
    .cta-button {
        font-size: 1.8rem;
        padding: 1rem 3.5rem;
    }
}

@media (max-width: 1024px) {
    .main-title {
        font-size: 3rem;
    }
    .logo {
        width: 14rem;
    }
    .sub-text {
        font-size: 1.2rem;
    }
    .cta-button {
        font-size: 1.5rem;
        padding: 0.8rem 2.5rem;
    }
}