/* ===============================================
   VARIABLES & RESET
   =============================================== */

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #10b981;
    --color-accent: #f59e0b;
    
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    
    --color-text: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Container */
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ===============================================
   UTILITIES
   =============================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    transition: transform var(--transition-base);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--color-primary);
}

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

.nav-link-cta {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--color-primary-dark);
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 1.5rem;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 50%, #f3f4f6 100%);
}

.hero-container {
    max-width: var(--container-max);
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    z-index: 1;
}

.hero-greeting {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-shape {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite;
    box-shadow: var(--shadow-xl);
    opacity: 0.1;
}

@keyframes morph {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    25% {
        border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
    }
    50% {
        border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
    }
    75% {
        border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
    }
}

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

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-tertiary);
    border-radius: var(--radius-full);
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--color-text-tertiary);
    border-radius: var(--radius-full);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        top: 8px;
        opacity: 1;
    }
    100% {
        top: 24px;
        opacity: 0;
    }
}

/* ===============================================
   BUTTONS
   =============================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

.fade-in {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.fade-in-delay-1 {
    animation: fadeInUp 0.8s ease 0.1s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.fade-in-delay-3 {
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.fade-in-delay-4 {
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

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

.about {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text {
    font-size: 1.125rem;
}

.about-intro {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.about-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-image {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-placeholder svg {
    width: 80%;
    height: 80%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

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

.skills {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--color-bg-secondary);
}

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

.skill-card {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.skill-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.skill-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.skill-icon svg {
    width: 32px;
    height: 32px;
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

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

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

.tag {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background-color: var(--color-bg-secondary);
    color: var(--color-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

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

.experience {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--color-bg);
}

.experience-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.experience-card {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.experience-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.experience-header {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.experience-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.experience-icon svg {
    width: 28px;
    height: 28px;
}

.experience-meta {
    flex: 1;
}

.experience-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.experience-company {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.experience-period {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

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

.experience-highlights {
    list-style: none;
    padding: 0;
}

.experience-highlights li {
    color: var(--color-text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

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

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

.contact {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

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

.contact-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.contact-method {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    text-decoration: none;
    transition: all var(--transition-base);
}

.contact-method:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-method-icon {
    width: 48px;
    height: 48px;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.contact-method-icon svg {
    width: 24px;
    height: 24px;
}

.contact-method-label {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    margin-bottom: 0.125rem;
}

.contact-method-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

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

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

.footer {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background-color: var(--color-text);
    color: var(--color-bg-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-xl);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-bg);
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    color: var(--color-text-tertiary);
    font-size: 0.9375rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-bg);
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-link:hover {
    background-color: var(--color-primary);
    transform: translateY(-4px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    gap: var(--spacing-md);
}

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

@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
        height: 300px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-tagline {
        margin-left: auto;
        margin-right: auto;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        height: 300px;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-3xl: 4rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        min-height: auto;
        padding: calc(var(--spacing-3xl) + 60px) var(--spacing-md) var(--spacing-2xl);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .contact-cta {
        flex-direction: column;
    }
    
    .contact-cta .btn {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ===============================================
   ACCESSIBILITY
   =============================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===============================================
   PRINT STYLES
   =============================================== */

@media print {
    .nav,
    .scroll-indicator,
    .btn,
    .footer {
        display: none;
    }
}