/* ---
Root Variables and Global Styles
--- */
:root {
    /* Color Palette */
    --color-background: #0a192f;
    --color-primary: #112240;
    --color-text-light: #ccd6f6;
    --color-text-dark: #8892b0;
    --color-accent: #64ffda;
    --color-white: #e6f1ff;

    /* Fonts */
    --font-primary: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --spacing-xxl: 128px;
    
    /* Transitions */
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-background);
    color: var(--color-text-light);
    font-family: var(--font-primary);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ---
General Utility & Component Styles
--- */
.section-title {
    font-size: clamp(26px, 5vw, 32px);
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.content-section {
    padding: var(--spacing-xxl) 0;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    border: 1px solid var(--color-accent);
}

.btn-primary {
    background-color: transparent;
    color: var(--color-accent);
}

.btn-primary:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
}

.btn-secondary:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

/* ---
Header & Navigation
--- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.header.scrolled {
    background-color: rgba(10, 25, 47, 0.85);
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

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

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

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed) ease;
}

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

/* ---
Hero Section
--- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.hero-content h1 {
    color: var(--color-accent);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.hero-content .hero-name {
    font-size: clamp(40px, 8vw, 80px);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    padding-bottom: 25px;
}

.hero-content .hero-subtitle {
    font-size: clamp(30px, 6vw, 30px);
    font-weight: 600;
    color: var(--color-text-dark);
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    max-width: 550px;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-xl);
}

/* Fade-in animations */
.fade-in { animation: fadeInUp 0.5s ease-out forwards; opacity: 0; }
.fade-in-delay1 { animation: fadeInUp 0.5s 0.1s ease-out forwards; opacity: 0; }
.fade-in-delay2 { animation: fadeInUp 0.5s 0.2s ease-out forwards; opacity: 0; }
.fade-in-delay3 { animation: fadeInUp 0.5s 0.3s ease-out forwards; opacity: 0; }
.fade-in-delay4 { animation: fadeInUp 0.5s 0.4s ease-out forwards; opacity: 0; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* CSS */
.profile-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 50px 0;
}

.profile-pic {
  width: 370px;
  height: 370px;
  border-radius: 50%;
  overflow: hidden;
  border: 5px solid #64ffda;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  animation: float 3s ease-in-out infinite;
}

.profile-pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Hover Effect */
.profile-pic:hover {
  transform: scale(1.08) rotate(2deg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Floating Animation */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
}



/* ---
About & Education Section
--- */
.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-xl);
}

.subsection-title {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ---
About & Education Section (UPDATED)
--- */
.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-xl);
}

.subsection-title {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.timeline {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    /* Move the line slightly to the left */
    left: 20px; 
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-primary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    /* Add padding to the item itself to create the gap */
    padding-left: 60px; 
}

.timeline-icon {
    position: absolute;
    /* Center the icon perfectly on the new line position */
    left: 0; 
    top: 0;
    width: 40px;
    height: 40px;
    background-color: var(--color-background);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.timeline-content h4 {
    color: var(--color-white);
    font-weight: 900;
    font-size: 1.2rem;
}

.timeline-duration {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}
.timeline-institution {
    color: var(--color-text-dark);
}


/* ---
Projects Section
--- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-primary);
    padding: var(--spacing-lg);
    border-radius: 4px;
    box-shadow: 0 10px 30px -15px rgba(2,12,27,0.7);
    transition: all var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 20px 30px -15px rgba(2,12,27,0.7);
}

.project-card h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.project-card p {
    color: var(--color-text-dark);
    flex-grow: 1; /* Pushes tags and links to the bottom */
}

.project-tags {
    margin-top: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--color-accent);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.project-links {
    margin-top: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 1.2rem;
    transition: color var(--transition-speed) ease;
}

.project-link:hover {
    color: var(--color-accent);
}

.project-link i {
    margin-right: var(--spacing-sm);
}

/* ---
Skills Section
--- */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-dark);
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.skill-item:hover {
    color: var(--color-accent);
    transform: translateY(-5px);
}

.skill-item img {
    width: 48px;
    height: 48px;
}

/* ---
Certificates Section
--- */
.cert-list {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cert-item {
    background-color: var(--color-primary);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: 4px;
    border-left: 4px solid transparent;
    transition: all var(--transition-speed) ease;
}

.cert-item:hover {
    border-left-color: var(--color-accent);
    transform: translateX(5px);
}

.cert-item span {
    color: var(--color-text-dark);
}

/* ---
Footer Section
--- */
.footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer h3 {
    font-size: 2rem;
    color: var(--color-text-light);
}

.footer p {
    max-width: 500px;
    margin: var(--spacing-md) auto;
    color: var(--color-text-dark);
}

.footer .btn {
    margin-top: var(--spacing-md);
}

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

.social-links a {
    color: var(--color-text-dark);
    font-size: 1.5rem;
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.social-links a:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.copyright {
    margin-top: var(--spacing-xl);
    font-size: 0.8rem;
    color: var(--color-text-dark);
}

/* ---
Responsive Design
--- */
@media (max-width: 768px) {
    .nav-menu {
        /* Future: Mobile menu can be implemented here */
        display: none;
    }
    
    .content-section {
        padding: var(--spacing-xl) 0;
    }   

    .hero-section {
        text-align: left;
        padding-top: 100px; /* Offset for header */
    }
}