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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 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);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    font-size: 16px;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 2rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

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

.hero-content {
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    animation: slideInLeft 0.8s ease forwards;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
    animation: slideInLeft 0.8s ease 0.2s forwards;
    opacity: 0;
    animation-fill-mode: forwards;
}

.hero-text {
    animation: slideInLeft 0.8s ease 0.4s forwards;
    opacity: 0;
    animation-fill-mode: forwards;
}

.hero-text p {
    font-size: 1.15rem;
    line-height: 1.9;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.hero-text p:last-child {
    margin-bottom: 0;
    font-weight: 500;
}

.hero-image {
    position: relative;
    z-index: 1;
    animation: slideInRight 0.8s ease 0.3s forwards;
    opacity: 0;
    animation-fill-mode: forwards;
}

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

.hero-image img {
    border-radius: 1.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 4px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-image img:hover {
    transform: scale(1.02) translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

/* Section Styles */
.section {
    padding: 5rem 2rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.section-alt {
    background-color: var(--bg-light);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.section-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.section-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.section-image img {
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.section-image img:hover {
    transform: scale(1.02);
}

.section-title-center {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    grid-column: 1 / -1;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    grid-column: 1 / -1;
}

/* Internship List Layout */
.section-container-full {
    max-width: 1200px;
    margin: 0 auto;
}

.internship-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-top: 3rem;
}

.internship-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.internship-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.internship-item.reverse {
    transform: translateX(30px);
}

.internship-item.reverse.visible {
    transform: translateX(0);
}

.internship-item.reverse .internship-image {
    order: 2;
}

.internship-item.reverse .internship-text {
    order: 1;
}

.internship-image {
    position: relative;
    overflow: hidden;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.internship-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.internship-item:hover .internship-image img {
    transform: scale(1.05);
}

.internship-text h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.internship-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* Lists */
.resume-list,
.platform-list {
    list-style: none;
    margin: 1.5rem 0;
}

.resume-list li,
.platform-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.1rem;
    color: var(--text-light);
}

.resume-list li::before,
.platform-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
}

/* Final Thought */
.final-thought {
    padding: 5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.final-content {
    max-width: 900px;
    margin: 0 auto;
}

.final-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.final-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.final-emphasis {
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 2rem;
}

.final-quote {
    font-size: 1.8rem;
    font-weight: 700;
    margin-top: 3rem;
    padding: 2rem 3rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-left: 5px solid white;
    border-radius: 0.5rem;
    font-style: italic;
    line-height: 1.6;
    text-align: left;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem;
    text-align: center;
}

.footer-content p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        margin-top: 70px;
        padding: 4rem 2rem;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .section-container {
        grid-template-columns: 1fr;
    }
    
    .internship-item {
        grid-template-columns: 1fr;
    }
    
    .internship-item.reverse .internship-image {
        order: 1;
    }
    
    .internship-item.reverse .internship-text {
        order: 2;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        padding: 1rem;
        display: block;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        padding: 3rem 1.5rem;
        margin-top: 70px;
        border-radius: 1rem;
        gap: 2rem;
    }
    
    .hero-content {
        padding: 0;
    }
    
    .hero-title {
        font-size: 2.2rem;
        margin-bottom: 0.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
        margin-bottom: 0.5rem;
    }
    
    .hero-text p {
        font-size: 1rem;
        margin-bottom: 1rem;
        line-height: 1.7;
    }
    
    .section {
        padding: 3rem 1.5rem;
    }
    
    .section-content h2 {
        font-size: 2rem;
    }
    
    .section-content p {
        font-size: 1rem;
    }
    
    .internship-item {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .internship-item.reverse .internship-image {
        order: 1;
    }
    
    .internship-item.reverse .internship-text {
        order: 2;
    }
    
    .internship-text h3 {
        font-size: 1.5rem;
    }
    
    .internship-text p {
        font-size: 1rem;
    }
    
    .final-content h2 {
        font-size: 2rem;
    }
    
    .final-content p {
        font-size: 1rem;
    }
    
    .final-quote {
        font-size: 1.3rem;
        padding: 1.5rem 1.5rem;
    }
}

/* Reduced Motion */
@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;
    }
}