/* SpaceX-Inspired Dark UI - Main CSS
 * Mobile-first responsive design
 * CSS Grid/Flexbox with CSS Variables
 */

/* ========================================
   CSS RESET
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ========================================
   CSS VARIABLES - Design System
   ======================================== */
:root {
    /* Colors - Backgrounds */
    --color-black: #000000;
    --color-black-soft: #0a0a0a;
    --color-black-light: #1a1a1a;

    /* Colors - Text */
    --color-white: #ffffff;
    --color-white-soft: #fafafa;
    --color-gray-300: #d4d4d4;
    --color-gray-500: #757575;

    /* Colors - Borders & Dividers */
    --color-gray-900: #212121;
    --color-gray-800: #2a2a2a;
    --color-gray-700: #424242;

    /* Colors - States */
    --color-red: #ff4444;
    --color-green: #44ff44;

    /* Typography - Font Sizes (1.25 ratio scale) */
    --font-size-sm: 0.875rem;        /* 14px */
    --font-size-base: 1rem;          /* 16px */
    --font-size-lg: 1.25rem;         /* 20px */
    --font-size-xl: 1.5rem;          /* 24px */
    --font-size-2xl: 2rem;           /* 32px */

    /* Typography - Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;

    /* Typography - Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing (4px base unit) */
    --spacing-1: 0.25rem;            /* 4px */
    --spacing-2: 0.5rem;             /* 8px */
    --spacing-3: 0.75rem;            /* 12px */
    --spacing-4: 1rem;               /* 16px - minimum */
    --spacing-6: 1.5rem;             /* 24px - comfortable */
    --spacing-8: 2rem;               /* 32px - generous */
    --spacing-12: 3rem;              /* 48px - section spacing */
    --spacing-16: 4rem;              /* 64px - large spacing */

    /* Animation */
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --ease-out: cubic-bezier(0, 0, 0.2, 1);

    /* Typography - Font Family */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ========================================
   BASE STYLES
   ======================================== */
html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: #333333;
    background-color: #ffffff;
    background-image: url('/img/IMG_2370.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: #1a1a1a;
    margin-bottom: var(--spacing-4);
}

h1 {
    font-size: var(--font-size-2xl);
}

h2 {
    font-size: var(--font-size-xl);
}

h3 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-4);
    color: #333333;
}

a {
    color: #1a1a1a;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
    color: #333333;
}

/* ========================================
   LAYOUT - Container & Grid
   ======================================== */
.container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container--narrow {
    max-width: 800px;
}

.container--wide {
    max-width: 1600px;
}

main {
    flex: 1;
    padding: var(--spacing-6);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Page Animation */
.page {
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   UTILITIES
   ======================================== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-uppercase {
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mt-4 {
    margin-top: var(--spacing-4);
}

.mb-4 {
    margin-bottom: var(--spacing-4);
}

.mt-6 {
    margin-top: var(--spacing-6);
}

.mb-6 {
    margin-bottom: var(--spacing-6);
}

.mt-8 {
    margin-top: var(--spacing-8);
}

.mb-8 {
    margin-bottom: var(--spacing-8);
}

/* ========================================
   LOADING SPINNER
   ======================================== */
.loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 2px solid #e0e0e0;
    border-top-color: #1a1a1a;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

/* ========================================
   FOOTER
   ======================================== */
footer {
    background: #f9f9f9;
    border-top: 1px solid #e0e0e0;
    padding: var(--spacing-6);
    text-align: center;
    margin-top: auto;
}

footer p {
    color: #666666;
    font-size: var(--font-size-sm);
    margin: 0;
}

/* ========================================
   RESPONSIVE - MOBILE FIRST
   ======================================== */

/* Tablet (768px+) */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }

    main {
        padding: var(--spacing-8);
    }

    h1 {
        font-size: calc(var(--font-size-2xl) * 1.1);
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    :root {
        --font-size-base: 1.125rem;  /* 18px on desktop */
    }

    .container {
        padding: 0 var(--spacing-8);
    }

    main {
        padding: var(--spacing-12);
    }

    h1 {
        font-size: calc(var(--font-size-2xl) * 1.25);
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Skip to content link for keyboard users */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: #1a1a1a;
    color: #ffffff;
    padding: var(--spacing-4) var(--spacing-6);
    text-decoration: none;
    z-index: 10000;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skip-to-content:focus {
    top: 0;
    outline: 2px solid #0066cc;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid #1a1a1a;
    outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast support (optional) */
@media (prefers-contrast: high) {
    :root {
        --color-gray-900: #444444;
        --color-gray-500: #999999;
    }
}

/* Dark mode support for users who prefer dark color scheme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #0a0a0a;
        --bg-tertiary: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #d4d4d4;
        --border-color: #2a2a2a;
    }

    body {
        background-color: var(--bg-primary);
        color: var(--text-primary);
    }

    h1, h2, h3, h4, h5, h6 {
        color: var(--text-primary);
    }

    p, a {
        color: var(--text-secondary);
    }

    a:hover {
        color: var(--text-primary);
    }
}