/* ===================================
   CSS Variables - Black & White Minimalist Theme
   High-End Monochrome Consulting Portfolio
   =================================== */
:root {
    /* Background Colors - Pure Black System */
    --color-bg-primary: #000000;           /* Pure black background */
    --color-bg-secondary: #0a0a0a;         /* Near-black for subtle contrast */
    --color-bg-tertiary: #121212;          /* Slightly lighter black for layering */
    
    /* Glass Effect Colors - Black & White Only */
    --glass-bg: rgba(0, 0, 0, 0.6);        /* Semi-transparent black */
    --glass-border: rgba(255, 255, 255, 0.1); /* Subtle white border */
    --glass-highlight: rgba(255, 255, 255, 0.03); /* Very subtle white highlight */
    
    /* Text Colors - White & Gray Hierarchy */
    --color-text-primary: #ffffff;         /* Pure white text */
    --color-text-secondary: #e5e5e5;       /* Light gray for secondary text */
    --color-text-muted: #999999;           /* Muted gray for tertiary text */
    
    /* Accent System - White Only */
    --color-accent: #ffffff;               /* White accent */
    --color-accent-subtle: rgba(255, 255, 255, 0.8); /* Subtle white */
    
    /* Effects - Monochrome Only */
    --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-strong: 0 12px 48px rgba(0, 0, 0, 0.6);
    --glow-white: 0 0 20px rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-hero: 4.5rem;
    
    /* Effects */
    --border-radius-sm: 12px;
    --border-radius-md: 20px;
    --border-radius-lg: 30px;
    --blur-amount: 20px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===================================
   Background Container
   =================================== */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#background-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.15; /* Very subtle white particles on black */
    filter: grayscale(100%) brightness(2); /* Convert to white particles */
}

/* Ensure content is above background */
nav, section, footer {
    position: relative;
    z-index: 1;
}

/* ===================================
   Glassmorphism Navigation
   Floating pill-style header
   =================================== */
.nav-glass {
    position: fixed;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    
    /* Black & White Glassmorphism */
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 0.75rem 1.5rem;
    
    box-shadow: 
        var(--shadow-medium),
        inset 0 1px 0 var(--glass-highlight);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 3rem;
    min-width: 400px;
}

.nav-main {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-contact {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-icon {
    font-size: 0.7rem;
    opacity: 0.7;
}

.nav-item:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-item:hover .nav-icon {
    opacity: 1;
}

/* Contact Pills in Navigation */
.contact-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.contact-pill:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    color: var(--color-text-primary);
    transform: scale(1.1);
    box-shadow: var(--glow-white);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===================================
   Hero Section - Split Layout
   =================================== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    padding-top: calc(var(--spacing-lg) + 80px);
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    align-items: center;
}

/* Left Side - Main Content with Glass Effect */
.hero-left {
    padding-right: var(--spacing-md);
}

.hero-content-glass {
    /* Black & White Glass Card */
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: 
        var(--shadow-medium),
        inset 0 1px 0 var(--glass-highlight);
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    line-height: 1.1;
    text-shadow: var(--glow-white);
}

.hero-tagline {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
}

.hero-details p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.hero-right {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 600px; /* Fixed height for marquee container */
}

/* ===================================
   Infinite Vertical Logo Marquee
   =================================== */

/* Main marquee container */
.logo-marquee {
    position: relative;
    width: 100%;
    max-width: 400px;
    height: 100%;
    overflow: hidden;
    
    /* Subtle glass background */
}

/* Scrolling track container */
.logo-track {
    display: flex;
    flex-direction: column;
    animation: scroll-up 20s linear infinite;
    will-change: transform;
}

/* 
   Keyframe animation for infinite vertical scroll
   - Moves from 0% to -50% (half the content height)
   - Because we duplicate the logo set, -50% brings us back to the start
   - This creates a seamless infinite loop
*/
@keyframes scroll-up {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-50%);
    }
}

/* Each logo track content section */
.logo-track-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    padding: 3rem 0;
}

/* Individual logo item */
.logo-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
}

.logo-item img {
    max-width: 150px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: var(--transition);
    border-radius: 4%;
    
    /* 
       Black & White Logo Harmonization
       - Pure grayscale conversion (no color tints)
       - Reduces brightness to integrate with black background
       - Maintains logo recognition while creating monochrome consistency
       
       To adjust the harmonization:
       - grayscale(1): always 1 for pure black & white
       - brightness(0.75): lower = darker, higher = brighter (0.6-0.9 range)
       - contrast(1.15): adjust sharpness (1.0-1.3 range)
       - opacity: overall visibility (0.7-0.9 for subtle integration)
    */
    opacity: 0.8;
}

.logo-item:hover img {
    /* 
       Hover state: slightly brighter and more visible
       - Pure grayscale maintained (no color)
       - Increases brightness and opacity for emphasis
       - Maintains black & white aesthetic
    */
    opacity: 1;
    transform: scale(1.05);
}

/* 
   Fade/Smoke Effect Gradients
   - Creates smooth fade at top and bottom
   - Logos appear to emerge from and disappear into darkness
*/
.marquee-fade {
    position: absolute;
    left: 0;
    right: 0;
    height: 150px;
    pointer-events: none;
    z-index: 2;
}

.marquee-fade-top {
    top: 0;
    background: linear-gradient(
        to bottom,
        #000000 0%,
        rgba(0, 0, 0, 0.9) 20%,
        rgba(0, 0, 0, 0.5) 50%,
        transparent 100%
    );
}

.marquee-fade-bottom {
    bottom: 0;
    background: linear-gradient(
        to top,
        #000000 0%,
        rgba(0, 0, 0, 0.9) 20%,
        rgba(0, 0, 0, 0.5) 50%,
        transparent 100%
    );
}

.experience-panel {
    width: 100%;
    padding: var(--spacing-md);
}

.panel-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--glass-border);
}

.experience-list {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-md);
}

.experience-item {
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.experience-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-accent);
    transform: translateX(4px);
    box-shadow: var(--glow-white);
}

.experience-company {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-brief {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Old SVG styling removed - now using simplified mini visual */

/* ===================================
   Glass Card Component
   Reusable glassmorphism card
   =================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 
        var(--shadow-medium),
        inset 0 1px 0 var(--glass-highlight);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    border-color: var(--color-accent);
    box-shadow: 
        var(--shadow-strong),
        var(--glow-white),
        inset 0 1px 0 var(--glass-highlight);
    transform: translateY(-4px);
}

/* Subtle white glow effect on hover */
.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.glass-card:hover .card-glow {
    opacity: 1;
}

/* ===================================
   Container and Section Utilities
   =================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--color-text-primary);
}

/* Old Experience Section removed - now in hero panel */
/* ===================================
   Services Section (Below Hero)
   =================================== */
.services {
    background: transparent;
    padding-top: var(--spacing-lg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    min-height: 220px;
    display: flex;
    flex-direction: column;
}

.service-icon {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-xl) 0;
}

.contact-card {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-lg);
}

.contact-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.glass-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 
        var(--shadow-soft),
        inset 0 1px 0 var(--glass-highlight);
}

.glass-btn:hover {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 
        var(--shadow-medium),
        var(--glow-white),
        inset 0 1px 0 var(--glass-highlight);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--glass-border);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-left {
        padding-right: 0;
    }
    
    .hero-right {
        margin-top: var(--spacing-md);
    }
    
    .experience-panel {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-hero: 3rem;
        --font-size-2xl: 1.75rem;
        --font-size-xl: 1.25rem;
        --spacing-xl: 4rem;
        --spacing-lg: 3rem;
    }
    
    .nav-glass {
        top: 1rem;
        padding: 0.5rem 1rem;
    }
    
    .nav-content {
        gap: 1rem;
        min-width: auto;
    }
    
    .nav-main {
        gap: 1rem;
    }
    
    .nav-text {
        display: none;
    }
    
    .nav-item {
        padding: 0.5rem;
    }
    
    .contact-pill {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .hero {
        padding-top: 5rem;
    }
    
    .hero-content-glass {
        padding: var(--spacing-md);
    }
    
    .cards-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-hero: 2.5rem;
        --spacing-md: 1.5rem;
    }
    
    .hero-title {
        letter-spacing: 1px;
    }
    
    .experience-panel {
        padding: var(--spacing-sm);
    }
    
    .experience-item {
        padding: 0.75rem;
    }
}

/* ===================================
   Performance: Reduce Motion
   =================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-visual {
        animation: none;
    }
    
    #background-canvas {
        display: none;
    }
}