:root {
    --bg-color: #f0fdfa;
    /* Light Teal/Cyan background */
    --text-color: #111827;
    /* Dark gray text */
    --accent-primary: #0d9488;
    /* Teal */
    --accent-secondary: #0ea5e9;
    /* Sky Blue */
    --accent-tertiary: #6366f1;
    /* Indigo */
    --glass-bg: rgba(255, 255, 255, 0.6);
    /* More opaque white for light mode */
    --glass-border: rgba(255, 255, 255, 0.8);
    --card-hover: rgba(255, 255, 255, 0.8);
    --font-main: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Background Gradient Animation */
.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 10% 20%, rgba(13, 148, 136, 0.1), transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.1), transparent 40%);
    z-index: -1;
    pointer-events: none;
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-family: var(--font-main);
    font-weight: 700;
    color: var(--text-color);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(240, 253, 250, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--accent-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 1rem 2rem 1rem;
}

.hero-content {
    max-width: 800px;
}

.profile-img-container {
    margin-bottom: 2rem;
    display: inline-block;
    position: relative;
}

.profile-img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-primary);
    box-shadow: 0 10px 30px rgba(13, 148, 136, 0.3);
    transition: transform 0.3s ease;
}

.profile-img:hover {
    transform: scale(1.05);
}

.greeting {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(to right, var(--accent-secondary), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.bio-summary {
    font-size: 1.1rem;
    opacity: 0.8;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
}

.btn.primary {
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn.secondary {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--text-color);
}

.btn.secondary:hover {
    background: var(--glass-bg);
    border-color: var(--accent-secondary);
}

/* Sections */
.section {
    padding: 6rem 5%;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 2px;
}

/* Glassmorphism Cards */
.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass:hover {
    transform: translateY(-5px);
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--accent-secondary);
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--glass-border);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-dot {
    position: absolute;
    left: -2.6rem;
    top: 1.5rem;
    width: 1.2rem;
    height: 1.2rem;
    background: var(--bg-color);
    border: 3px solid var(--accent-primary);
    border-radius: 50%;
}

.timeline-content .date {
    font-size: 0.9rem;
    color: var(--accent-tertiary);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.timeline-content .location {
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-secondary);
}

.project-desc {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.project-details {
    list-style: none;
}

.project-details li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.project-details li i {
    color: var(--accent-primary);
}

.project-details a:hover {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* Education Grid */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.edu-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.edu-card .year {
    display: block;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--accent-primary);
}

.cert-list {
    list-style: none;
    margin-top: 0.5rem;
}

.cert-list li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.cert-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-secondary);
}

/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-content p {
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.contact-btn {
    padding: 1rem 2rem;
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    font-weight: 600;
    background: rgba(99, 102, 241, 0.1);
}

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--glass-border);
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
        /* Simple hide for now, could add mobile menu JS */
    }

    .timeline {
        padding-left: 1rem;
    }

    .timeline-dot {
        left: -1.6rem;
        width: 1rem;
        height: 1rem;
    }
}

@media (max-height: 800px) {
    .hero {
        padding-top: 100px;
    }

    .profile-img {
        width: 140px;
        height: 140px;
    }

    .hero h1 {
        font-size: 3rem;
    }
}