/* --- General Setup & Variables --- */
:root {
    --dark-navy: #0a192f;
    --light-navy: #112240;
    --lightest-navy: #233554;
    --slate: #8892b0;
    --light-slate: #a8b2d1;
    --lightest-slate: #ccd6f6;
    --accent-color: #64ffda;
    --font-sans: 'Calibri', 'San Francisco', 'SF Pro Text', -apple-system, system-ui, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--dark-navy);
    color: var(--slate);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
}

/* --- Subtle Animations --- */
.hidden {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

/* --- Header & Navigation --- */
.header {
    background-color: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--lightest-navy);
    padding: 0 2rem;
    position: fixed;
    width: 100%;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
}

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

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

.nav-link {
    color: var(--lightest-slate);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.hamburger { 
    display: none; 
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 0;
}

.bar { 
    display: block; 
    width: 25px; 
    height: 3px; 
    margin: 5px auto; 
    background-color: var(--lightest-slate); 
    transition: all 0.3s ease-in-out; 
}

/* --- Sections --- */
.content-section {
    padding: 100px 15%;
    max-width: 1100px;
    margin: 0 auto;
}

.content-section h2 {
    color: var(--lightest-slate);
    font-size: 2rem;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 10px;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--accent-color);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 80vh; /* Changed to min-height for better responsiveness */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--lightest-slate);
    background: var(--dark-navy);
    padding: 0 1rem;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem); /* Responsive font size */
    color: var(--lightest-slate);
}

.hero-text p {
    font-size: clamp(1rem, 2.5vw, 1.2rem); /* Responsive font size */
    color: var(--accent-color);
    margin-top: 10px;
    max-width: 600px;
}

/* --- Experience Timeline --- */
.timeline { position: relative; margin-top: 40px; }
.timeline::before { content: ''; position: absolute; left: 15px; top: 0; bottom: 0; width: 3px; background-color: var(--lightest-navy); }
.timeline-item { margin-bottom: 30px; position: relative; padding-left: 50px; }
.timeline-item::before { content: ''; position: absolute; left: 8px; top: 5px; width: 15px; height: 15px; background-color: var(--accent-color); border-radius: 50%; z-index: 1; }
.timeline-content { background-color: var(--light-navy); padding: 20px; border-radius: 8px; border: 1px solid var(--lightest-navy); }
.timeline-content h3 { color: var(--accent-color); }

/* --- Accomplishments Section --- */
.accomplishments-cards-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 40px;
}
.accomplishment-card {
    background: var(--light-navy);
    padding: 25px;
    border-radius: 5px;
    border-left: 4px solid var(--accent-color);
}
.accomplishment-card h4 { color: var(--lightest-slate); margin-bottom: 10px; }

/* --- Competencies Grid --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 40px;
}
.skill-card { background-color: var(--light-navy); padding: 25px; border-radius: 8px; transition: transform 0.3s ease; }
.skill-card:hover { transform: translateY(-5px); }
.skill-card h3 { color: var(--lightest-slate); margin-bottom: 10px; }

/* --- Contact Section --- */
.contact { text-align: center; }
.btn { display: inline-block; color: var(--accent-color); background-color: transparent; border: 1px solid var(--accent-color); padding: 12px 25px; border-radius: 5px; text-decoration: none; margin: 20px 10px; transition: background-color 0.3s ease; }
.btn:hover { background-color: rgba(100, 255, 218, 0.1); }
.contact-details { margin-top: 30px; line-height: 2.5; }
.contact-details p { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.contact-details a { color: var(--light-slate); text-decoration: none; }
.contact-details a:hover { text-decoration: underline; color: var(--accent-color); }
.contact-details .fas, .contact-details .fab { color: var(--accent-color); }

/* --- Footer --- */
.footer { text-align: center; padding: 20px; font-size: 0.9rem; }
.copyright { color: var(--slate); }

/* --- Responsive Design for Mobile --- */
@media(max-width: 768px) {
    .content-section { padding: 80px 10%; }
    .hamburger { display: block; }
    .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-menu { position: fixed; left: -100%; top: 70px; flex-direction: column; background-color: var(--light-navy); width: 100%; height: calc(100vh - 70px); text-align: center; transition: left 0.3s ease-in-out; gap: 1rem; padding-top: 2rem; }
    .nav-menu.active { left: 0; }
}