:root {
    /* 
     * COLOR PALETTE (Split Complementary based on Red)
     * Base Hue: 0 (Red)
     * Split Complements: ~150 (Mint/Teal) and ~210 (Blue)
     */
    --c-bg-dark: #050505;       /* Deepest black/grey */
    --c-bg-panel: #0f1115;      /* Slightly lighter panel background */
    
    --c-primary: #ff2a2a;       /* Main Red - Attention/Action */
    --c-accent-1: #00ffbf;      /* Mint/Teal - Secondary Info */
    --c-accent-2: #0099ff;      /* Blue - Highlights */
    
    --c-text-main: #f0f0f0;     /* High readability */
    --c-text-dim: #888888;      /* Decorative/Meta info */

    /* LAYOUT & SPACING */
    --spacing-unit: 1.5rem;
    --max-width: 800px;         /* Constraints for large screens */
    
    /* STYLE TOKENS */
    --border-width: 2px;
    --corner-size: 20px;
    
    /* FONTS */
    --font-stack-main: sans-serif;
    --font-stack-tech: monospace;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    background-color: var(--c-bg-dark);
    /* Subtle dot texture for depth */
    background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    
    color: var(--c-text-main);
    font-family: var(--font-stack-main), sans-serif;
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.5;
    position: relative;
    overflow-x: hidden;
}

/* SCREEN OVERLAY EFFECT (Scanlines & Vignette) */
body::after {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: 
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
    z-index: 999;
}

/* MAIN CONTAINER (The "HUD" Box) */
main {
    width: 90%;
    max-width: var(--max-width);
    padding: calc(var(--spacing-unit) * 2);
    background-color: var(--c-bg-panel);
    border: 1px solid var(--c-text-dim);
    position: relative;
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
    
    /* TECH CORNERS (CSS Gradients) */
    background-image: 
        linear-gradient(to right, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to bottom, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to left, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to bottom, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to right, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to top, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to left, var(--c-primary) var(--border-width), transparent var(--border-width)),
        linear-gradient(to top, var(--c-primary) var(--border-width), transparent var(--border-width));
    
    background-position: 
        0 0, 0 0, 
        100% 0, 100% 0, 
        0 100%, 0 100%, 
        100% 100%, 100% 100%;
        
    background-size: var(--corner-size) var(--corner-size);
    background-repeat: no-repeat;
}

/* TYPOGRAPHY */
h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    margin: 0 0 var(--spacing-unit) 0;
    text-transform: uppercase;
    letter-spacing: -0.05em;
    color: var(--c-text-main);
}

h2 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 400;
    color: var(--c-text-dim);
    margin: 0 0 calc(var(--spacing-unit) * 2) 0;
    border-left: 4px solid var(--c-accent-2);
    padding-left: 1rem;
}

h3 {
    font-size: 1.5rem;
    color: var(--c-accent-1);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.1rem;
    max-width: 60ch;
    margin-bottom: var(--spacing-unit);
}

a {
    color: var(--c-accent-2);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

a:hover {
    border-bottom-color: var(--c-accent-2);
}

/* FORM STYLES */
.signupForm {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 3rem;
    padding: 2rem;
    border: 1px dashed var(--c-text-dim);
    background: rgba(0,0,0,0.2);
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--c-accent-1);
}

input {
    background: var(--c-bg-dark);
    border: 1px solid var(--c-text-dim);
    color: var(--c-primary);
    padding: 1rem;
    font-size: 1.25rem;
    font-family: inherit;
    width: 100%;
}

input:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 15px rgba(255, 42, 42, 0.3);
}

/* 3D ACTION BUTTON */

button.callToActionButton {
    background: var(--c-primary);
    color: #000; /* Contrast text on red */
    font-family: inherit;
    font-size: 1.25rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 1.2rem 2rem;
    border: 0;
    cursor: pointer;
    position: relative;
    transition: transform 0.1s, box-shadow 0.1s;
    
    /* 3D Block Effect */
    box-shadow: 
        6px 6px 0 var(--c-accent-2),   /* Blue shadow */
        12px 12px 0 rgba(0,0,0,0.5);   /* Depth shadow */
        
    /* Animation hook */
    animation: attention-pulse 3s infinite;
}

button.callToActionButton:hover {
    transform: translate(2px, 2px);
    box-shadow: 
        4px 4px 0 var(--c-accent-2),
        8px 8px 0 rgba(0,0,0,0.5);
    background-color: #fff; /* Flash white on hover */
}

button.callToActionButton:active {
    transform: translate(6px, 6px);
    box-shadow: none;
}

@keyframes attention-pulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

/* DECOR & UTILS */
.decor-bottom {
    margin-top: 2rem;
    font-family: var(--font-stack-tech), monospace; /* Tech look */
    font-size: 0.8rem;
    color: var(--c-text-dim);
    display: flex;
    justify-content: flex-end;
    border-top: 1px solid var(--c-text-dim);
    padding-top: 0.5rem;
    opacity: 0.7;
}

/* RESPONSIVE LAYOUT */
/* Stacked layout enforced on all screens to prevent layout shifts */