/* ============================================
   Global Styles & Variables
   ============================================ */

:root {
    /* Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --tertiary-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --accent-purple: #667eea;
    --accent-pink: #f5576c;
    --accent-blue: #4facfe;
    
    /* Neutral Colors */
    --text-dark: #1a1a2e;
    --text-light: #f5f5f5;
    --bg-dark: #0f0f1e;
    --bg-light: #ffffff;
    --border-light: #e0e0e0;
    
    /* 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 */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-accent: 'Poppins', sans-serif;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

p {
    color: #666;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

/* ============================================
   Container & Common Classes
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: #888;
    margin-top: var(--spacing-md);
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--secondary-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

/* Button Styles */
.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-primary);
    font-size: 1rem;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: var(--accent-purple);
    color: white;
    transform: translateY(-3px);
}

/* ============================================
   Navigation Bar
   ============================================ */

.navbar {
    background: linear-gradient(to bottom, rgba(255,255,255,0.95), rgba(255,255,255,0.7));
    backdrop-filter: blur(10px);
    padding: 1.5rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

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

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-gradient);
    transition: width var(--transition-base);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    border-radius: 3px;
    transition: all var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    position: relative;
    overflow: hidden;
    margin-top: 60px;
}

.hero-container {
    container: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    width: 100%;
}

.hero-content {
    z-index: 10;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    animation: slideInDown 1s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.3rem, 4vw, 1.8rem);
    color: var(--accent-pink);
    font-family: var(--font-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: slideInDown 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    max-width: 500px;
    animation: slideInDown 1s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    animation: slideInDown 1s ease-out 0.6s both;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gradient-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    top: 0;
    left: 0;
    opacity: 0.7;
    animation: float 6s ease-in-out infinite;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    bottom: 50px;
    right: 0;
    opacity: 0.6;
    animation: float 8s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    bottom: 0;
    left: 50px;
    opacity: 0.5;
    animation: float 7s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(30px);
    }
}

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

/* ============================================
   About Section
   ============================================ */

.about {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

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

.about-image {
    display: flex;
    justify-content: center;
}

.profile-placeholder {
    width: 320px;
    height: 400px;
    background: var(--primary-gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
    color: white;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    transition: all var(--transition-slow);
}

.profile-placeholder:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(102, 126, 234, 0.4);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
    line-height: 1.8;
    color: #555;
}

.about-intro {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.skills-summary {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: #f8f9ff;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-purple);
}

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

.skills-list {
    list-style: none;
}

.skills-list li {
    margin-bottom: var(--spacing-md);
    color: #666;
}

.skills-list strong {
    color: var(--text-dark);
}

/* ============================================
   Skills Section
   ============================================ */

.skills {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.skill-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    border: 2px solid transparent;
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-color: var(--accent-purple);
}

.skill-icon {
    font-size: 3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1) rotate(10deg);
}

.skill-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.skill-card p {
    font-size: 0.95rem;
    color: #888;
}

/* ============================================
   Projects Section
   ============================================ */

.projects {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    transition: all var(--transition-base);
}

.gradient-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.gradient-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.gradient-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.gradient-4 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.gradient-5 { background: linear-gradient(135deg, #30cfd0 0%, #330867 100%); }
.gradient-6 { background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); }

.project-card:hover .project-placeholder {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-button {
    background: white;
    color: var(--accent-purple);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transform: scale(0.8);
    transition: all var(--transition-base);
}

.project-card:hover .project-button {
    transform: scale(1);
}

.project-button:hover {
    background: var(--accent-purple);
    color: white;
}

.project-content {
    padding: var(--spacing-lg);
}

.project-content h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.project-content p {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.tech-tag {
    background: #f0f0ff;
    color: var(--accent-purple);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.tech-tag:hover {
    background: var(--accent-purple);
    color: white;
}

/* ============================================
   Experience Section
   ============================================ */

.experience {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
}

.timeline {
    position: relative;
    padding: var(--spacing-2xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-purple), var(--accent-pink));
}

.timeline-item {
    margin-bottom: var(--spacing-3xl);
    width: 50%;
    position: relative;
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
    padding-right: var(--spacing-2xl);
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -40px;
    left: auto;
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
    text-align: left;
    padding-left: var(--spacing-2xl);
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -40px;
    right: auto;
}

.timeline-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border: 4px solid var(--accent-purple);
    border-radius: 50%;
    top: 25px;
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-marker {
    width: 30px;
    height: 30px;
    top: 20px;
    background: var(--accent-purple);
    box-shadow: 0 0 0 8px rgba(102, 126, 234, 0.1);
}

.timeline-content {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-content {
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
    transform: scale(1.05);
}

.timeline-content h3 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.timeline-company {
    color: var(--accent-purple);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    color: #999;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.timeline-description {
    color: #666;
    line-height: 1.6;
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #f0f4f8 100%);
    color: var(--text-dark);
}

.contact .section-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact .section-subtitle {
    color: #666;
    font-size: 1.1rem;
}

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

.contact-form-wrapper {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.1);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1.25rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    background: #f8f9fa;
    color: var(--text-dark);
    transition: all var(--transition-base);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background: white;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
    font-family: var(--font-primary);
}

.contact-form .btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    margin-top: var(--spacing-md);
    padding: 1rem 2rem;
    font-weight: 600;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.info-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(245, 87, 108, 0.15));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-purple);
}

.info-item h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
    color: var(--text-dark);
}

.info-item p {
    color: #666;
    font-size: 0.95rem;
}

.social-links {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid #e0e0e0;
}

.social-links h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

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

.social-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(245, 87, 108, 0.15));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-purple);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.social-icon:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.footer p {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.heart {
    color: var(--accent-pink);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.3);
    }
}

.footer-credit {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        gap: 0;
        padding: var(--spacing-lg) 0;
        z-index: 999;
    }

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

    .hamburger {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-illustration {
        height: 300px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .profile-placeholder {
        width: 250px;
        height: 250px;
        font-size: 80px;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        width: 100%;
        margin-left: 0 !important;
        text-align: left;
        padding-left: 80px !important;
        padding-right: 0 !important;
    }

    .timeline-marker {
        left: 30px;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .nav-menu {
        gap: 0;
    }

    .nav-link {
        padding: var(--spacing-md) 0;
    }
}

/* ============================================
   Animations (AOS - Animate On Scroll)
   ============================================ */

[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos="fade-up"] {
    transform: translate3d(0, 40px, 0);
}

[data-aos="fade-down"] {
    transform: translate3d(0, -40px, 0);
}

[data-aos="fade-left"] {
    transform: translate3d(40px, 0, 0);
}

[data-aos="fade-right"] {
    transform: translate3d(-40px, 0, 0);
}

[data-aos="zoom-in"] {
    transform: translate3d(0, 0, 0) scale(0.9);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translate3d(0, 0, 0) !important;
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }