/* ====================================
   CSS CUSTOM PROPERTIES
   ==================================== */
:root {
    /* Colors - Silver Ash & Black Theme */
    --primary-silver: #C0C0C0;
    --silver-light: #D8D8D8;
    --silver-medium: #B8B8B8;
    --silver-dark: #A8A8A8;
    
    --black-primary: #000000;
    --black-secondary: #050505;
    --black-tertiary: #0A0A0A;
    
    --gradient-silver: linear-gradient(135deg, #C0C0C0 0%, #A8A8A8 100%);
    --gradient-aurora: linear-gradient(135deg, #C0C0C0 0%, #B8B8B8 50%, #A8A8A8 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-Index */
    --z-preloader: 10000;
    --z-navbar: 1000;
    --z-modal: 900;
    --z-dropdown: 800;
    
    /* Glass Effect */
    --glass-bg: rgba(192, 192, 192, 0.05);
    --glass-border: rgba(192, 192, 192, 0.1);
    --glass-blur: 20px;
}

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

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    line-height: 1.6;
    color: var(--silver-light);
    background: linear-gradient(135deg, #000000 0%, #050505 25%, #0A0A0A 50%, #050505 75%, #000000 100%);
    background-size: 400% 400%;
    animation: gradientBG 20s ease infinite;
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Hide scrollbar on mobile/webkit while keeping scroll functionality */
::-webkit-scrollbar {
    width: 0px;
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: transparent;
}

* {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ====================================
   ACCESSIBILITY
   ==================================== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary-silver);
    color: var(--black-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 10001;
    font-weight: var(--font-weight-semibold);
}

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

/* Focus States */
*:focus-visible {
    outline: 2px solid var(--primary-silver);
    outline-offset: 4px;
}

/* ====================================
   UTILITY CLASSES
   ==================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 767px) {
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
}

.section-padding {
    padding: var(--spacing-3xl) 0;
}

.center {
    text-align: center;
}

.bg-dark {
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.8) 0%, rgba(0, 0, 0, 0.9) 50%, rgba(10, 10, 10, 0.8) 100%);
}

/* Glassmorphism */
.glass-effect {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.05) 0%, rgba(168, 168, 168, 0.03) 100%);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

.glass-card {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.05) 0%, rgba(168, 168, 168, 0.03) 100%);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    will-change: transform;
}

.glass-card:hover {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.1) 0%, rgba(168, 168, 168, 0.06) 100%);
    border-color: rgba(192, 192, 192, 0.2);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Spotlight Card */
.spotlight-card {
    position: relative;
    overflow: hidden;
}

.spotlight-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(192, 192, 192, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.spotlight-card:hover::before {
    opacity: 1;
}

/* Neon Card */
.neon-card {
    box-shadow: 0 0 20px rgba(192, 192, 192, 0.2),
                0 0 40px rgba(192, 192, 192, 0.1);
}

.neon-card:hover {
    box-shadow: 0 0 30px rgba(192, 192, 192, 0.4),
                0 0 60px rgba(192, 192, 192, 0.2);
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-aurora);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dot {
    color: var(--primary-silver);
}

/* Typography */
.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--silver-light);
}

.eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary-silver);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--silver-medium);
    max-width: 600px;
    margin: 0 auto;
}

.large-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--silver-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-silver);
    color: var(--black-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(192, 192, 192, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--silver-light);
    border: 2px solid var(--silver-dark);
}

.btn-secondary:hover {
    background: var(--glass-bg);
    border-color: var(--primary-silver);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Card Link */
.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-silver);
    font-weight: var(--font-weight-medium);
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: 0.75rem;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--primary-silver);
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}