:root {
    --dark-navy: #0A192F;
    --navy-shadow: rgba(2, 12, 27, 0.7);
    --light-slate: #CCD6F6;
    --slate: #8892B0;
    --white: #FFFFFF;
    --accent-color: #64FFDA;
    --accent-tint: rgba(100, 255, 218, 0.1);
    --font-sans: 'Inter', sans-serif;
    --transition-speed: 0.25s;
}

* {
    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;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed) ease-in-out;
}

#loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-navy);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loader {
    border: 4px solid var(--slate);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: all var(--transition-speed) ease-in-out;
}

.navbar.scrolled {
    background-color: var(--navy-shadow);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px -10px var(--navy-shadow);
}

.nav-logo {
    width: 32px;
    height: auto;
}

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

.nav-item {
    color: var(--light-slate);
    font-size: 0.9rem;
}

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

.button-primary {
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: background-color var(--transition-speed) ease-in-out;
    cursor: pointer;
}

.button-primary:hover {
    background-color: var(--accent-tint);
}

.button-primary i {
    margin-right: 8px;
}

.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 0 2rem;
}

.hero-content {
    max-width: 1000px;
}

.hero-intro {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.hero-name {
    font-size: clamp(40px, 8vw, 80px);
    color: var(--light-slate);
    font-weight: 700;
    line-height: 1.1;
}

.hero-tagline {
    font-size: clamp(30px, 6vw, 60px);
    color: var(--slate);
    font-weight: 600;
    line-height: 1.2;
    margin-top: 10px;
    min-height: 70px;
}

.hero-bio {
    max-width: 600px;
    margin-top: 1.5rem;
    font-size: 1.1rem;
}

.hero-socials {
    margin-top: 2rem;
    display: flex;
    gap: 1.5rem;
}

.hero-socials i {
    font-size: 1.5rem;
    color: var(--slate);
    transition: color var(--transition-speed) ease-in-out, transform var(--transition-speed) ease-in-out;
}

.hero-socials i:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

.content-section {
    padding: 100px 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.section-heading {
    display: flex;
    align-items: center;
    font-size: 2rem;
    color: var(--light-slate);
    margin-bottom: 2.5rem;
    white-space: nowrap;
}

.section-heading::after {
    content: "";
    display: block;
    width: 300px;
    height: 1px;
    background-color: var(--slate);
    margin-left: 20px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-text p {
    margin-bottom: 1rem;
}

.about-photo-wrapper {
    width: 100%;
    max-width: 300px;
    position: relative;
}

.about-photo {
    width: 100%;
    border-radius: 4px;
    filter: grayscale(100%);
    transition: filter var(--transition-speed) ease;
}

.about-photo:hover {
    filter: none;
}

.experience-timeline {
    position: relative;
    max-width: 700px;
}

.experience-item {
    padding-left: 30px;
    border-left: 2px solid var(--slate);
    margin-bottom: 50px;
    position: relative;
}

.experience-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-color);
    border: 2px solid var(--dark-navy);
}

.experience-header {
    margin-bottom: 5px;
}

.experience-role {
    font-size: 1.25rem;
    color: var(--light-slate);
    font-weight: 600;
}

.experience-company {
    color: var(--accent-color);
    font-size: 1.1rem;
}

.experience-company a {
    color: var(--accent-color);
}

.experience-duration {
    margin-bottom: 15px;
    color: var(--slate);
    font-size: 0.9rem;
}

.experience-duties {
    list-style-type: none;
}

.experience-duties li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}

.experience-duties li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.skill-category-title {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.skill-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background-color: #112240;
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 10px 30px -15px var(--navy-shadow);
    transition: transform var(--transition-speed) ease-in-out, box-shadow var(--transition-speed) ease-in-out;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px -15px var(--navy-shadow);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.project-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
}

.project-link i {
    font-size: 1.5rem;
    color: var(--slate);
}

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

.project-title {
    font-size: 1.25rem;
    color: var(--light-slate);
    margin-bottom: 1rem;
}

.project-description {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tech-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--slate);
    margin-top: auto;
}

.footer {
    padding: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--slate);
}

/* --- Certifications Section --- */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.certification-card {
    background-color: #112240; /* Using a color consistent with project cards */
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 10px 30px -15px var(--navy-shadow);
    transition: transform var(--transition-speed) ease-in-out, box-shadow var(--transition-speed) ease-in-out;
    text-align: center;
}

.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px -15px var(--navy-shadow);
}

.certification-card a {
    text-decoration: none;
    color: inherit;
    display: block; /* Make the whole card clickable */
}

.certification-image {
    width: 100%;
    max-height: 180px; /* Adjust as needed */
    object-fit: contain;
    border-radius: 3px; /* Slightly smaller radius than card */
    margin-bottom: 1rem;
    background-color: var(--white); /* Ensures visibility for transparent PNGs */
}

.certification-title {
    font-size: 1rem;
    color: var(--light-slate);
    font-weight: 600;
    min-height: 40px; /* To align titles if they wrap to two lines */
}

.certification-card h3 b {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 500; /* Lighter than the title */
    margin-top: 0.25rem; /* Add a small space above the issuer */
}
/* End of Certifications Section */

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    .navbar {
        padding: 1rem;
    }
    .nav-center {
        display: none;
    }
    .section-heading::after {
        width: 100px;
    }
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .about-photo-wrapper {
        margin: 0 auto;
    }
}