/* ==========================================================================
   Premium Portfolio Styles
   ========================================================================== */
:root {
    --primary-color: #3b82f6; /* Modern Blue */
    --primary-hover: #2563eb;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-main: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #e5e7eb;
    
    --font-main: 'Open Sans', Arial, sans-serif;
    
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-main);
    color: var(--text-main);
}

body {
    background-color: var(--bg-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-hover);
}

ul {
    list-style: none;
}

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

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

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.section-title {
    margin-bottom: 3rem;
    position: relative;
    display: flex;
    justify-content: center;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--text-main);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

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

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

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.main-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

.section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

.section:last-of-type {
    border-bottom: none;
}

/* Animations for scroll */
.hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
#hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}

.hero-content {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-pic-container {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 2rem;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-md);
}

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

#hero h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.tagline {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-text {
    font-size: 1.1rem;
    color: #4b5563;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==========================================================================
   Resume / Education Section
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--bg-tertiary);
}

.timeline-item {
    position: relative;
    padding-left: 50px;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 7px;
    top: 5px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--bg-main);
}

.timeline-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.edu-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.edu-head h3 {
    font-size: 1.3rem;
    margin: 0;
}

.edu-head .date {
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-muted);
    font-weight: 600;
}

.timeline-content .sub-text {
    font-size: 0.9rem;
    font-weight: 400;
    margin-top: 0.5rem;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.skill-category {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.skill-category p {
    font-size: 1rem;
    color: var(--text-main);
    line-height: 1.8;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-secondary);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.2);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-muted);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.contact-info p {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.contact-info a {
    color: var(--primary-color);
    font-weight: 600;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background: #111827;
    padding: 3rem 0;
    text-align: center;
}

.footer-content p {
    color: #9ca3af;
    margin: 0;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    /* Mobile Navigation */
    .hamburger {
        display: block;
        z-index: 1001;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.98);
        width: 100%;
        height: 100vh;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        justify-content: center;
        padding-bottom: 4rem;
    }

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

    .nav-links li {
        margin: 1.5rem 0;
    }

    .nav-links a {
        font-size: 1.5rem;
    }

    #hero h1 {
        font-size: 2.5rem;
    }

    .edu-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .section {
        padding: 4rem 0;
    }
}