/* Global Reset and Typography */
:root {
    /* Primary Color (Medical Blue) */
    --primary-color: #007BFF; 
    /* Secondary/Text Color */
    --secondary-color: #343A40; 
    /* Updated Light Background Color (Clinical Aqua/Mint) */
    --light-bg: #E6F7F7; 
    --text-color: #495057;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: white; 
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: var(--secondary-color);
    font-weight: 600;
    line-height: 1.2;
}

.section {
    padding: 80px 0;
}

/* Updated Background Color */
.bg-light {
    background-color: var(--light-bg);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* Header & Navigation */
#navbar {
    background-color: white;
    border-bottom: 1px solid var(--light-bg);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.3s;
}

#navbar.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li a {
    text-decoration: none;
    color: var(--secondary-color);
    margin-left: 25px;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover, nav ul li a.active {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    /* Using the lighter color for hero contrast */
    background-color: var(--light-bg);
    padding: 100px 0;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-text {
    max-width: 60%;
}

.hero-text p:first-child {
    font-size: 1.2rem;
    color: var(--text-color);
}

.hero-text h2 {
    font-size: 4rem;
    margin: 5px 0;
    color: var(--primary-color);
}

.hero-text h3 {
    font-size: 1.7rem;
    margin-bottom: 20px;
    font-weight: 400;
}

.hero-image {
    max-width: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 8px solid white;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    /* Placeholder style */
    background-color: #ccc; 
    aspect-ratio: 1/1; 
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    margin-top: 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.2s;
}

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

.primary-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

/* About Section */
.lead-text {
    text-align: center;
    font-size: 1.25rem;
    margin-bottom: 40px;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.about-card {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.about-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.about-card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* Experience (Timeline) */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    right: -8px;
    background-color: white;
    border: 3px solid var(--primary-color);
    top: 25px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -8px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.timeline-content h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.timeline-content .period {
    color: #6c757d;
    font-style: italic;
    margin-bottom: 10px;
}

.timeline-content ul {
    /* Ensures list items are displayed as bullets */
    margin-left: 20px;
    list-style: disc; 
    padding-top: 5px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.skill-category {
    padding: 30px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
}

.skill-category h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
    color: var(--secondary-color);
}

.skill-category h3 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: 5px 0;
    border-bottom: 1px dotted var(--light-bg);
    /* For list-style to look clean, we keep it hidden here but use disc in experience */
    position: relative; 
    padding-left: 15px;
}

.skill-category li::before {
    content: "\2022"; /* Unicode for bullet */
    color: var(--primary-color); 
    font-weight: bold; 
    display: inline-block; 
    width: 1em; 
    margin-left: -1em; 
}


/* Education Section */
.education-item, .certification-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-left: 5px solid var(--primary-color);
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.education-item i, .certification-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.education-item h3, .certification-item h3 {
    margin-bottom: 5px;
    font-size: 1.5rem;
}

/* Contact Section */
.contact-details {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
    flex-wrap: wrap;
}

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

.contact-info i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-info p a {
    color: var(--text-color);
    text-decoration: none;
}

.contact-info p a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
}

/* --- Media Queries for Responsive Design (UX) --- */
@media (max-width: 992px) {
    .about-grid, .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-text h2 {
        font-size: 3rem;
    }
    .hero-image {
        max-width: 250px;
    }
}

@media (max-width: 768px) {
    .nav-content nav {
        display: none; 
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 60px;
        left: 0;
        background-color: white;
        padding: 10px 0;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    }

    .nav-content nav.active {
        display: flex;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li a {
        margin: 10px 0;
        padding: 10px 20px;
        display: block;
        width: 100%;
        text-align: center;
    }
    
    .menu-toggle {
        display: block;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }
    .hero-text {
        max-width: 100%;
    }
    .hero-image {
        margin-bottom: 20px;
    }

    .timeline::after {
        left: 20px; 
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 5px;
        left: 0 !important;
    }

    .timeline-dot {
        left: 12px !important;
        right: auto !important;
    }
    
    .about-grid, .skills-grid {
        grid-template-columns: 1fr;
    }
}