/* ===================================
   CSS Variables & Design System
   =================================== */
:root {
    /* Colors - Dark Theme with Refined Accent */
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-elevated: #1a1a1a;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #666666;
    --color-accent: #6366f1;
    --color-accent-hover: #818cf8;
    --color-gradient-start: #6366f1;
    --color-gradient-end: #8b5cf6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography - Space Grotesk (Display) + Inter (Body) */
    --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --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: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;

    /* Animation */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.33, 1, 0.68, 1);

    /* Layout */
    --container-max-width: 1200px;
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
}

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

html {
    scroll-behavior: smooth;
    cursor: none;
}

@media (max-width: 768px) {
    html {
        cursor: auto;
    }
}

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

/* Display font for headings */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

a {
    text-decoration: none;
    color: inherit;
    position: relative;
}

/* Animated link underline */
a:not(.cta-button):not(.social-link):not(.submit-button):hover {
    color: var(--color-accent);
}

a:not(.cta-button):not(.social-link):not(.submit-button)::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

a:not(.cta-button):not(.social-link):not(.submit-button):hover::after {
    width: 100%;
}

/* ===================================
   Custom Cursor
   =================================== */
.custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 10000;
    mix-blend-mode: difference;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    transition: transform var(--transition-fast);
}

.cursor-outline {
    width: 32px;
    height: 32px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base), opacity var(--transition-base);
}

.cursor-text {
    position: absolute;
    transform: translate(-50%, -50%);
    font-size: 12px;
    font-weight: 500;
    color: white;
    opacity: 0;
    transition: opacity var(--transition-base);
    white-space: nowrap;
    pointer-events: none;
}

.cursor-hover .cursor-dot {
    transform: translate(-50%, -50%) scale(1.5);
}

.cursor-hover .cursor-outline {
    width: 48px;
    height: 48px;
}

.cursor-active .cursor-outline {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .custom-cursor {
        display: none;
    }
}

/* ===================================
   Layout Components
   =================================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.03em;
}

/* ===================================
   Hero Section with Enhanced Effects
   =================================== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(at 27% 37%, hsla(245, 80%, 60%, 0.12) 0px, transparent 50%),
        radial-gradient(at 97% 21%, hsla(265, 70%, 55%, 0.10) 0px, transparent 50%),
        radial-gradient(at 52% 99%, hsla(240, 75%, 58%, 0.08) 0px, transparent 50%),
        radial-gradient(at 10% 29%, hsla(250, 85%, 62%, 0.09) 0px, transparent 50%),
        radial-gradient(at 97% 96%, hsla(260, 65%, 50%, 0.07) 0px, transparent 50%),
        radial-gradient(at 33% 50%, hsla(255, 78%, 56%, 0.11) 0px, transparent 50%),
        radial-gradient(at 79% 53%, hsla(248, 72%, 54%, 0.08) 0px, transparent 50%);
    animation: meshGradient 25s ease infinite;
    will-change: transform;
}

@keyframes meshGradient {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }

    33% {
        transform: scale(1.05) rotate(1deg);
        opacity: 0.9;
    }

    66% {
        transform: scale(0.98) rotate(-1deg);
        opacity: 0.95;
    }
}

/* Grain/Noise Overlay */
.grain-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='3.5' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    pointer-events: none;
}

/* Ambient Floating Shapes */
.ambient-shapes {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    will-change: transform;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4), transparent);
    top: 10%;
    left: 20%;
    animation: float1 30s ease-in-out infinite;
}

.shape-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3), transparent);
    bottom: 20%;
    right: 15%;
    animation: float2 35s ease-in-out infinite;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent);
    top: 50%;
    left: 50%;
    animation: float3 40s ease-in-out infinite;
}

@keyframes float1 {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -50px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 30px) scale(0.9);
    }
}

@keyframes float2 {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(-40px, 40px) scale(0.9);
    }

    66% {
        transform: translate(30px, -30px) scale(1.1);
    }
}

@keyframes float3 {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        transform: translate(calc(-50% + 50px), calc(-50% - 50px)) scale(1.05);
    }
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: clamp(var(--font-size-5xl), 8vw, var(--font-size-6xl));
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.04em;
}

/* Staggered Letter Reveal */
.letter-reveal {
    display: inline-block;
}

.letter-reveal .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px) rotateX(-90deg);
    animation: letterReveal 0.6s var(--ease-out) forwards;
}

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

.hero-subtitle {
    font-size: clamp(var(--font-size-lg), 2vw, var(--font-size-2xl));
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

.reveal-text {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    animation: revealText 0.8s var(--ease-out) forwards;
}

.reveal-text.delay-1 {
    animation-delay: 0.6s;
}

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

/* CTA Button with Ripple Effect */
.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.button-text {
    position: relative;
    z-index: 1;
}

.button-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.4);
    width: 0;
    height: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.cta-button:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3),
        0 0 60px rgba(99, 102, 241, 0.1);
}

.cta-button:hover::before {
    opacity: 0.1;
}

.cta-button:active {
    transform: translateY(0) scale(0.98);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 0.3;
        transform: translateY(0);
    }

    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* ===================================
   About Section
   =================================== */
.about-section {
    background: var(--color-surface);
}

.about-text {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 800px;
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

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

.skill-card {
    padding: var(--spacing-lg);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
}

.skill-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    transition: transform var(--transition-base);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
}

.skill-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.skill-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ===================================
   Projects Section with 3D Tilt
   =================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-slow);
    cursor: none;
    position: relative;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
            rgba(99, 102, 241, 0.15),
            transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
    z-index: 1;
}

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

.project-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(99, 102, 241, 0.2);
}

.project-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
    position: relative;
}

.project-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.3));
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.tag {
    padding: 0.375rem 0.75rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-accent-hover);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
}

/* ===================================
   Contact Section
   =================================== */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    margin-bottom: var(--spacing-2xl);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1),
        0 0 20px rgba(99, 102, 241, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-button {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.submit-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.submit-button span {
    position: relative;
    z-index: 1;
}

.submit-button:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.2);
}

.submit-button:hover::before {
    opacity: 0.1;
}

.submit-button:active {
    transform: translateY(0) scale(0.98);
}

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

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-4px) rotate(5deg);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.social-link:active {
    transform: translateY(-2px) rotate(5deg) scale(0.95);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-border);
}

/* ===================================
   Animation Classes
   =================================== */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item {
    opacity: 0;
    transform: translateY(20px);
}

.stagger-item.visible {
    animation: staggerFade 0.5s var(--ease-out) forwards;
}

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

/* ===================================
   Accessibility & Performance
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .hero-background,
    .shape,
    .grain-overlay {
        animation: none !important;
    }

    .reveal-text,
    .fade-in-section,
    .stagger-item,
    .letter-reveal .letter {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

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

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

    /* Disable 3D effects on mobile */
    .project-card {
        transform: none !important;
    }

    .project-card::before {
        display: none;
    }

    .ambient-shapes {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
}

/* ===================================
   Performance Optimizations
   =================================== */
.hero-background,
.project-card,
.skill-card,
.cta-button,
.submit-button,
.social-link,
.shape {
    will-change: transform;
}

.fade-in-section.visible,
.stagger-item.visible {
    will-change: auto;
}

.project-image {
    contain: layout;
}

@media screen and (min-width: 1024px) {
    body {
        text-rendering: optimizeLegibility;
    }
}