/* ============================================
   CSS Variables
   ============================================ */
:root {
    --color-bg: #0a0a0f;
    --color-bg-alt: #12121a;
    --color-primary: #8b5cf6;
    --color-primary-light: #a78bfa;
    --color-primary-lighter: #c4b5fd;
    --color-accent: #ec4899;
    --color-text: #e5e7eb;
    --color-text-dim: #9ca3af;
    --color-text-dimmer: #6b7280;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 3rem;
    
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Reset & Base
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background: linear-gradient(135deg, #0a0a0f 0%, #1a0a2e 25%, #16213e 50%, #0f0f23 75%, #0a0a0f 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(167, 139, 250, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(196, 181, 253, 0.08) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

/* ============================================
   WebGL Canvas
   ============================================ */
.webgl {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    outline: none;
}

/* ============================================
   Content Container
   ============================================ */
.content {
    position: relative;
    z-index: 1;
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.hero__content {
    z-index: 2;
}

.hero__title {
    font-size: clamp(var(--font-size-3xl), 8vw, var(--font-size-4xl));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-lighter));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-dim);
    font-weight: 400;
    max-width: 600px;
}

.hero__visual {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
}

.model-container--hero {
    height: 600px;
}

/* ============================================
   Section
   ============================================ */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.section--alt {
    background: linear-gradient(135deg, rgba(18, 18, 26, 0.6) 0%, rgba(26, 10, 46, 0.4) 50%, rgba(18, 18, 26, 0.6) 100%);
    backdrop-filter: blur(10px);
    position: relative;
}

.section--alt::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.section__container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.section__container--reverse {
    grid-template-columns: 1fr 1fr;
}

.section__container--reverse .section__visual {
    order: -1;
}

.section__text {
    max-width: 700px;
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-lighter));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
    border-radius: 2px;
}

.section__content {
    color: var(--color-text);
}

.section__content p {
    margin-bottom: var(--spacing-sm);
}

.lead {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-md) !important;
}

/* ============================================
   Model Container
   ============================================ */
.section__visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: sticky;
    top: 100px;
    height: fit-content;
}

.model-container {
    width: 100%;
    height: 500px;
    position: relative;
    border-radius: var(--border-radius);
    background: rgba(139, 92, 246, 0.05);
    border: 1px solid rgba(139, 92, 246, 0.2);
    overflow: hidden;
    transition: var(--transition);
}

.model-container:hover {
    background: rgba(139, 92, 246, 0.08);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.2);
}

/* ============================================
   Job Cards
   ============================================ */
.job {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.05);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.job:hover {
    background: rgba(139, 92, 246, 0.1);
    transform: translateX(4px);
}

.job__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.job__company {
    font-size: var(--font-size-base);
    color: var(--color-primary-light);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.job__list {
    list-style: none;
    padding: 0;
}

.job__list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-dim);
}

.job__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ============================================
   Education Cards
   ============================================ */
.education {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: var(--transition);
}

.education:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
}

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

.education__institution {
    font-size: var(--font-size-base);
    color: var(--color-primary-light);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.education p {
    color: var(--color-text-dim);
}

/* ============================================
   Skills Grid
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: var(--transition);
}

.skill-category:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
    transform: translateY(-4px);
}

.skill-category__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--color-text);
    transition: var(--transition);
}

.skill-tag:hover {
    background: rgba(139, 92, 246, 0.3);
    transform: translateY(-2px);
}

/* ============================================
   Contact Grid
   ============================================ */
.contact-grid {
    display: grid;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.05);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition);
}

.contact-card:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.4);
    transform: translateX(4px);
}

.contact-card__icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-card__content {
    display: flex;
    flex-direction: column;
}

.contact-card__label {
    font-size: 0.875rem;
    color: var(--color-text-dimmer);
    font-weight: 500;
}

.contact-card__value {
    font-size: var(--font-size-base);
    color: var(--color-primary-light);
    font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    color: var(--color-text-dim);
    background: rgba(18, 18, 26, 0.5);
    backdrop-filter: blur(10px);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero__visual {
        order: -1;
    }

    .model-container--hero {
        height: 400px;
    }

    .section__container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .section__container--reverse .section__visual {
        order: 0;
    }

    .section__visual {
        position: relative;
        top: 0;
    }

    .model-container {
        height: 400px;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        padding: var(--spacing-md);
    }

    .model-container--hero {
        height: 300px;
    }

    .model-hint {
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }

    .model-hint__icon {
        font-size: 1rem;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .model-container {
        height: 300px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .section__title {
        font-size: var(--font-size-xl);
    }

    .job,
    .education,
    .skill-category {
        padding: var(--spacing-sm);
    }
}

.model-hint {
    font-size: 0.875rem;
    color: var(--color-text-dim);
    text-align: center;
    padding: 0.75rem 1.5rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.model-hint__icon {
    font-size: 1.25rem;
}

/* ============================================
   Scroll Animations
   ============================================ */
.animate-hero {
    opacity: 1;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.animate-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-child {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-child.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Section specific animations */
.section .section__text {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s,
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s;
}

.section.is-visible .section__text {
    opacity: 1;
    transform: translateX(0);
}

.section .section__visual {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s,
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s;
}

.section.is-visible .section__visual {
    opacity: 1;
    transform: translateX(0);
}

/* Reverse animation for reversed sections */
.section--alt .section__text {
    transform: translateX(30px);
}

.section--alt.is-visible .section__text {
    transform: translateX(0);
}

.section--alt .section__visual {
    transform: translateX(-30px);
}

.section--alt.is-visible .section__visual {
    transform: translateX(0);
}

/* Title animation */
.section .section__title {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.3s,
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}

.section.is-visible .section__title {
    opacity: 1;
    transform: translateY(0);
}

/* Model container animation */
.section .model-container {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.5s,
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.5s;
}

.section.is-visible .model-container {
    opacity: 1;
    transform: translateX(0);
}

/* Hero animations - NONE */
.hero__title,
.hero__subtitle,
.hero__visual,
.hero .model-container {
    opacity: 1 !important;
    transform: none !important;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* ============================================
   Accessibility
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    /* Reset all animations */
    .animate-section,
    .animate-child,
    .section__text,
    .section__visual,
    .section__title,
    .model-container,
    .hero__title,
    .hero__subtitle,
    .hero__visual {
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
        transition: none !important;
    }
}

/* Focus styles */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --color-text: #ffffff;
        --color-text-dim: #e5e7eb;
        --color-bg: #000000;
    }
}

/* Print styles */
@media print {
    .webgl {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .section--alt {
        background: #f5f5f5;
    }
}