/* ========================================
   nexUS Observatories - Base Styles
   Reset, Variables, Typography, Container
   ======================================== */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Custom Properties */
:root {
    --primary-color: #4facfe;
    --secondary-color: #00f2fe;
    --dark-bg: #0a0e17;
    --dark-bg-alt: #040714;
    --card-bg: rgba(10, 25, 47, 0.6);
    --card-border: rgba(64, 153, 255, 0.2);
    --text-primary: #e0f7ff;
    --text-secondary: #c2e4ff;
    --text-muted: #7cb9e8;
    --font-primary: 'Montserrat', sans-serif;
    --font-display: 'Orbitron', sans-serif;
    --transition: all 0.3s ease;
}

/* Body */
body {
    font-family: var(--font-primary);
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(16, 64, 128, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(64, 16, 128, 0.1) 0%, transparent 20%),
        linear-gradient(to bottom, var(--dark-bg), var(--dark-bg-alt));
    position: relative;
}

/* Accessibility: Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: var(--dark-bg);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Visually Hidden Helper */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;

}