/* ====================================
   DESIGN SYSTEM & CSS VARIABLES
   ==================================== */

:root {
    /* Color Palette - Vibrant Dark Theme */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #151520;
    --color-bg-tertiary: #1a1a2e;

    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-accent-tertiary: #ec4899;

    --color-gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --color-gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --color-gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --color-gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b8;
    --color-text-muted: #6b6b85;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

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

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
}

/* ====================================
   RESET & BASE STYLES
   ==================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundPulse 20s ease-in-out infinite;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ====================================
   TYPOGRAPHY
   ==================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
}

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

a:hover {
    color: var(--color-accent-secondary);
}

/* ====================================
   NAVIGATION
   ==================================== */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: all var(--transition-medium);
}

nav.scrolled {
    padding: var(--spacing-xs) var(--spacing-md);
    box-shadow: var(--glass-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: var(--color-gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    color: var(--color-text-primary);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-gradient-hero);
    transition: all var(--transition-medium);
    transform: translateX(-50%);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-medium);
}

/* ====================================
   SECTIONS
   ==================================== */

section {
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: var(--color-gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ====================================
   HERO SECTION
   ==================================== */

#hero {
    position: relative;
    text-align: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.hero-greeting {
    font-size: var(--font-size-md);
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.hero-name {
    font-size: clamp(2.5rem, 8vw, 5rem);
    margin-bottom: var(--spacing-sm);
    background: var(--color-gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.hero-title {
    font-size: clamp(1.2rem, 4vw, 2rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-md);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.hero-cta {
    display: inline-flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--color-gradient-hero);
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--color-text-primary);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    border-color: var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Floating Animation for Hero Elements */
.hero-float {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

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

    50% {
        transform: translateY(-20px);
    }
}

/* ====================================
   ABOUT SECTION
   ==================================== */

#about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image-wrapper {
    width: 300px;
    height: 300px;
    border-radius: var(--radius-lg);
    background: var(--color-gradient-hero);
    padding: 4px;
    margin: 0 auto;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.about-image-inner {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    animation: rotate-reverse 20s linear infinite;
}

@keyframes rotate-reverse {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(-360deg);
    }
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-card {
    background: var(--glass-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all var(--transition-medium);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--glass-shadow);
}

.stat-number {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--color-gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* ====================================
   EXPERIENCE SECTION
   ==================================== */

.experience-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-gradient-hero);
    transform: translateX(-50%);
}

.experience-item {
    margin-bottom: var(--spacing-lg);
    position: relative;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.experience-item:nth-child(1) {
    animation-delay: 0.1s;
}

.experience-item:nth-child(2) {
    animation-delay: 0.2s;
}

.experience-item:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.experience-card {
    background: var(--glass-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    transition: all var(--transition-medium);
    position: relative;
    margin-left: calc(50% + 30px);
    width: calc(50% - 30px);
}

.experience-card::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 30px;
    width: 20px;
    height: 20px;
    background: var(--color-gradient-hero);
    border-radius: 50%;
    border: 4px solid var(--color-bg-primary);
}

.experience-card::after {
    content: '';
    position: absolute;
    left: -10px;
    top: 38px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 10px solid var(--glass-border);
}

.experience-card:hover {
    transform: translateX(10px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--glass-shadow);
}

.experience-role {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.experience-company {
    font-size: var(--font-size-md);
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.experience-description {
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

.experience-description li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-sm);
    position: relative;
}

.experience-description li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent-primary);
}

/* ====================================
   PROJECTS SECTION
   ==================================== */

#projects {
    background: var(--color-bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.project-card {
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-md);
    transition: all var(--transition-medium);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-gradient-hero);
    transform: scaleX(0);
    transition: transform var(--transition-medium);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent-primary);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.2);
}

.project-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
}

.project-link {
    color: var(--color-accent-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: all var(--transition-fast);
}

.project-link:hover {
    transform: translateX(3px);
}

/* ====================================
   SKILLS SECTION
   ==================================== */

.skills-container {
    max-width: 900px;
    margin: 0 auto;
}

.skills-category {
    margin-bottom: var(--spacing-lg);
}

.skills-category h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-sm);
}

.skill-item {
    background: var(--glass-bg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all var(--transition-medium);
    cursor: default;
}

.skill-item:hover {
    transform: scale(1.05);
    border-color: var(--color-accent-primary);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.skill-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* ====================================
   EDUCATION & CERTIFICATIONS
   ==================================== */

#education {
    background: var(--color-bg-secondary);
}

.education-grid {
    display: grid;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.education-card,
.cert-card {
    background: var(--glass-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-medium);
}

.education-card:hover,
.cert-card:hover {
    transform: translateX(10px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--glass-shadow);
}

.education-degree {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.education-school {
    color: var(--color-accent-primary);
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-xs);
}

.education-period {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.education-grade {
    font-size: var(--font-size-md);
    color: var(--color-accent-secondary);
    font-weight: 600;
    margin-top: var(--spacing-xs);
}

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

.cert-name {
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.cert-issuer {
    color: var(--color-accent-primary);
    font-size: var(--font-size-sm);
}

/* ====================================
   CONTACT SECTION
   ==================================== */

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-md);
}

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

.contact-link {
    background: var(--glass-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-medium);
    min-width: 200px;
}

.contact-link:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent-primary);
    box-shadow: var(--glass-shadow);
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-info {
    text-align: left;
}

.contact-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.contact-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ====================================
   FOOTER
   ==================================== */

footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

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

.social-link {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-medium);
}

.social-link:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.footer-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ====================================
   SCROLL ANIMATIONS
   ==================================== */

.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */

@media (max-width: 968px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .experience-timeline::before {
        left: 20px;
    }

    .experience-card {
        margin-left: 50px;
        width: calc(100% - 50px);
    }

    .experience-card::before {
        left: -30px;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2.5rem;
        --font-size-2xl: 2rem;
        --font-size-xl: 1.5rem;
    }

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

    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--color-bg-secondary);
        width: 100%;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--glass-border);
        transition: left var(--transition-medium);
    }

    .nav-links.active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

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

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .contact-links {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-link {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .about-image-wrapper {
        width: 250px;
        height: 250px;
    }
}