:root {
    --text-color: #ffffff;
    --font-main: 'Poppins', sans-serif;
    --accent-glow: 0 0 20px rgba(0, 255, 204, 0.4);
}

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

body {
    font-family: var(--font-main);
    background: #0f2027; 
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    overflow-y: auto; /* Allow scroll on mobile */
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem 1rem;
    width: 100%;
}

header {
    text-align: center;
    width: 100%;
}

h1 {
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
    background: linear-gradient(to bottom, #fff, #999);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

footer {
    opacity: 0.6;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Global modal backdrop if needed, though we can put it in the component */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}