/* ==========================================================================
   CSS Variables
   ========================================================================== */
html, body {
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

:root {
    --color-primary: #000000;
    --color-secondary: #2a2a2a;
    --color-accent: #000000;
    --color-text-light: #1a1a1a;
    --color-background-primary: #ffffff;
    --color-background-secondary: #f5f5f5;
    --color-background-accent: #fafafa;
    --color-hover-bg: rgba(0,0,0,0.05);
    --color-hover-bg-strong: rgba(0,0,0,0.1);
    
    --font-family-primary: 'Source Sans Pro', 'Helvetica Neue', 'Arial', sans-serif;
    --font-size-heading: 2.2em;
    --font-size-body: 1.1em;
    --font-weight-normal: 400;
    --font-weight-medium: 600;
    
    --spacing-xs: 20px;
    --spacing-sm: 25px;
    --spacing-md: 28px;
    --spacing-lg: 50px;
    --spacing-xl: 60px;
    
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    
    --transition-default: all 0.3s ease;
    --transition-width: width 0.3s ease;
    
    --container-max-width: 700px;
    --container-padding: 60px 30px;
}

/* ==========================================================================
   Base Layout & Typography
   ========================================================================== */
.page-container {
    font-family: var(--font-family-primary);
    line-height: 1.7;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--container-padding);
    color: var(--color-text-light);
    background: 
        linear-gradient(135deg, var(--color-background-primary) 0%, var(--color-background-accent) 50%, var(--color-background-secondary) 100%);
    min-height: 100vh;
    position: relative;
}

.page-container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 1200px 900px at 20% 80%, rgba(26,26,46,0.08) 0%, transparent 75%),
        radial-gradient(ellipse 900px 1200px at 80% 20%, rgba(22,33,62,0.06) 0%, transparent 75%),
        radial-gradient(ellipse 500px 500px at 50% 50%, rgba(52,73,94,0.04) 0%, transparent 65%),
        radial-gradient(ellipse 300px 300px at 30% 30%, rgba(240,249,255,0.4) 0%, transparent 60%),
        radial-gradient(ellipse 300px 300px at 70% 70%, rgba(254,247,240,0.3) 0%, transparent 60%),
        linear-gradient(30deg, rgba(240,249,255,0.2) 0%, transparent 30%, rgba(254,247,240,0.15) 70%, transparent 100%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

.page-container::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        conic-gradient(from 0deg at 20% 20%, rgba(26,26,46,0.1) 0deg, transparent 60deg, rgba(22,33,62,0.08) 120deg, transparent 180deg, rgba(52,73,94,0.06) 240deg, transparent 300deg, rgba(26,26,46,0.1) 360deg),
        conic-gradient(from 180deg at 80% 80%, rgba(240,249,255,0.2) 0deg, transparent 90deg, rgba(254,247,240,0.15) 180deg, transparent 270deg, rgba(240,249,255,0.2) 360deg);
    pointer-events: none;
    z-index: -1;
    animation: conicRotate 30s linear infinite;
}

@keyframes cosmicShift {
    0%, 100% { 
        transform: translateX(0) translateY(0) scale(1) rotate(0deg);
        filter: hue-rotate(0deg) brightness(1);
    }
    25% { 
        transform: translateX(-30px) translateY(-20px) scale(1.05) rotate(2deg);
        filter: hue-rotate(15deg) brightness(1.1);
    }
    50% { 
        transform: translateX(20px) translateY(-30px) scale(0.95) rotate(-1deg);
        filter: hue-rotate(-10deg) brightness(0.9);
    }
    75% { 
        transform: translateX(-15px) translateY(25px) scale(1.02) rotate(1deg);
        filter: hue-rotate(8deg) brightness(1.05);
    }
}

@keyframes cosmicRotate {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
    100% { transform: rotate(360deg) scale(1); }
}

/* ==========================================================================
   Floating Geometric Elements
   ========================================================================== */
.page-container {
    overflow: visible;
}

.page-container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 600px 400px at 20% 20%, rgba(0,0,0,0.03) 0%, transparent 60%),
        radial-gradient(ellipse 500px 600px at 80% 80%, rgba(0,0,0,0.02) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}


/* ==========================================================================
   Typography Components
   ========================================================================== */
.heading-primary {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-heading);
    font-weight: var(--font-weight-medium);
    letter-spacing: -0.3px;
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.heading-secondary {
    color: var(--color-primary);
    margin: -60px auto 20px auto;
    font-size: 1.6em;
    font-weight: var(--font-weight-medium);
    letter-spacing: -0.2px;
    text-align: center;
    position: relative;
    padding-bottom: 20px;
    display: block;
    width: 100%;
}

.heading-secondary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    border-radius: 1px;
}

.text-body {
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    position: relative;
    padding-left: var(--spacing-xs);
    border-left: 2px solid transparent;
    transition: var(--transition-default);
}

.text-body:hover {
    border-left-color: var(--color-accent);
    padding-left: var(--spacing-sm);
    background: var(--color-hover-bg);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    transform: translateX(5px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* ==========================================================================
   Interactive Components
   ========================================================================== */
.link-primary {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    position: relative;
    padding: 2px 4px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-default);
    background: linear-gradient(90deg, transparent, transparent);
}

.link-primary::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-width);
}

.link-primary:hover {
    background: var(--color-hover-bg-strong);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 25px rgba(0,0,0,0.15);
}

.link-primary:hover::before {
    width: 100%;
}

/* ==========================================================================
   Mobile Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    .page-container {
        padding: 30px 20px;
        max-width: 100%;
    }
    
    .heading-primary {
        font-size: 1.8em;
        margin-bottom: 30px;
    }
    
    .heading-secondary {
        font-size: 1.3em;
        margin-top: -40px;
        margin-bottom: 15px;
        padding-bottom: 15px;
    }
    
    .text-body {
        font-size: 1em;
        line-height: 1.6;
        margin-bottom: 20px;
        padding-left: 0;
        text-align: left;
    }
    
    .text-body:hover {
        padding: 15px;
        transform: none;
    }
    
    .link-primary {
        padding: 4px 6px;
        font-size: 0.95em;
    }
    
    .link-primary:hover {
        transform: none;
    }
}

@media (max-width: 480px) {
    .page-container {
        padding: 20px 15px;
    }
    
    .heading-primary {
        font-size: 1.6em;
        margin-bottom: 25px;
    }
    
    .heading-secondary {
        font-size: 1.2em;
        margin-top: -35px;
        margin-bottom: 12px;
        padding-bottom: 12px;
    }
    
    .text-body {
        font-size: 0.95em;
        margin-bottom: 18px;
    }
    
    .heading-primary::after {
        width: 60px;
    }
    
    .heading-secondary::after {
        width: 40px;
    }
}