:root {
    --bg-primary: #0a192f;
    --bg-secondary: #112240;
    --text-primary: #e6f1ff;
    --text-secondary: #8892b0;
    --accent: #64ffda;
    --accent-dim: rgba(100, 255, 218, 0.1);
    --font-heading: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    /* Fallback */
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
}

h1 {
    font-size: clamp(3rem, 5vw, 5rem);
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 3vw, 3rem);
}

h3 {
    font-size: 1.5rem;
}

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

.section-title::before {
    content: '0' counter(section) '.';
    counter-increment: section;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 1.2rem;
    margin-right: 10px;
    font-weight: 400;
}

body {
    counter-reset: section;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 100px 0;
}

.bg-dim {
    background-color: var(--bg-secondary);
}

/* Header */
.glass-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    padding: 1rem 0;
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.logo {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 1.2rem;
    text-decoration: none;
    border: 1px solid var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    transition: var(--transition);
}

.logo:hover {
    background: var(--accent-dim);
}

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

/* Centered navigation */
.nav-centered {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Always visible nav links (override mobile hide) */
.nav-links.always-visible {
    display: flex !important;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.nav-links li {
    counter-increment: item 1;
}

.nav-links a::before {
    content: "0" counter(item) ".";
    color: var(--accent);
    margin-right: 5px;
}

/* Button */
.btn-primary {
    color: var(--accent);
    background: transparent;
    border: 1px solid var(--accent);
    border-radius: 4px;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-mono);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--accent-dim);
}

.btn-secondary {
    color: var(--text-primary);
    background: transparent;
    border: 1px solid var(--text-secondary);
    /* Corrected from --text-primary for better contrast */
    border-radius: 4px;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-mono);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Hero */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 50px;
}

.hero-container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

.hero-greeting {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.hero-bio {
    margin-top: 25px;
    max-width: 540px;
    font-size: 1.1rem;
}

.hero-btns {
    margin-top: 50px;
    display: flex;
    gap: 1.5rem;
}

/* Code Block Visual */
.code-block {
    background: #112240;
    border-radius: 8px;
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    box-shadow: 0 20px 50px -15px rgba(2, 12, 27, 0.7);
    border: 1px solid #233554;
}

.code-header {
    margin-bottom: 1rem;
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.red {
    background: #ff5f56;
}

.yellow {
    background: #ffbd2e;
}

.green {
    background: #27c93f;
}

pre {
    color: #a8b2d1;
}

.keyword {
    color: #c678dd;
}

.function {
    color: #61afef;
}

.string {
    color: #98c379;
}

.class-name {
    color: #e5c07b;
}

.self {
    color: #e06c75;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-secondary);
    padding: 2rem 1rem;
    text-align: center;
    border-radius: 4px;
    transition: var(--transition);
    cursor: default;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.icon-box {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Languages */
.languages-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.language-card {
    background: var(--bg-primary);
    padding: 1.5rem 2.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid #233554;
    transition: var(--transition);
}

.language-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.lang-flag {
    font-size: 2.5rem;
}

.lang-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.lang-level {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
}

/* Experience */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: #233554;
    top: 0;
    bottom: 0;
    left: 0;
    margin-left: -1px;
}

.timeline-item {
    position: relative;
    padding-left: 40px;
    margin-bottom: 50px;
}

.timeline-marker {
    position: absolute;
    width: 16px;
    height: 16px;
    left: -8px;
    top: 5px;
    background: var(--bg-primary);
    border: 2px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content .date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: inline-block;
}

.company-name {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    /* Increased min-width for media */
    gap: 2rem;
}

.project-card {
    background: var(--bg-secondary);
    border-radius: 8px;
    /* Slightly larger radius */
    overflow: hidden;
    /* Important for media corners */
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-7px);
}

.project-media {
    width: 100%;
    height: 200px;
    /* Fixed height for consistency */
    background: #020c1b;
    border-bottom: 1px solid #233554;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-img,
.project-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.iframe-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.project-placeholder {
    font-size: 3rem;
    color: var(--text-secondary);
    opacity: 0.3;
}

.project-confidential-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    height: 100%;
    background: linear-gradient(135deg, #1a2a4a 0%, #0a192f 100%);
}

.project-confidential-placeholder i {
    font-size: 2.5rem;
    color: var(--accent);
    opacity: 0.7;
}

.project-confidential-placeholder span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-card.confidential {
    border: 1px solid rgba(100, 255, 218, 0.2);
}

.nda-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.6rem;
    background: rgba(255, 165, 0, 0.15);
    border: 1px solid rgba(255, 165, 0, 0.3);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: #ffa500;
    font-weight: 600;
}

.project-company {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.project-company i {
    margin-right: 0.35rem;
}

.project-content-wrapper {
    padding: 1.5rem;
    /* Padding applied here instead of on card */
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

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

.project-links a {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-left: 1rem;
    transition: var(--transition);
}

.project-links a:hover {
    color: var(--accent);
}

.project-body h3 {
    margin-bottom: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.project-body h3:hover {
    color: var(--accent);
}

.project-body p {
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.project-footer {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Education */
.education-card {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 8px;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    border: 1px solid var(--accent);
}

.edu-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

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

.certification-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    border: 1px solid #233554;
    transition: var(--transition);
}

.certification-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.cert-icon {
    font-size: 2rem;
    color: var(--accent);
    padding: 1rem;
    background: var(--accent-dim);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.cert-content .cert-issuer,
.cert-content .cert-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.cert-content .cert-issuer i,
.cert-content .cert-date i {
    margin-right: 0.5rem;
    color: var(--accent);
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    background: var(--accent-dim);
    border-radius: 4px;
    text-decoration: none;
    transition: var(--transition);
}

.cert-link:hover {
    background: var(--accent);
    color: var(--bg-primary);
}

/* Contact */
.contact-cta {
    margin-top: 2rem;
}

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


/* Animations */
.fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

.delay-4 {
    animation-delay: 0.4s;
}

/* Responsive */
@media (max-width: 992px) {
    .section {
        padding: 60px 0;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {

    /* Header Mobile */
    .glass-header {
        padding: 0.75rem 0;
    }

    .nav-links.always-visible {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.4rem;
    }

    .nav-links.always-visible li a {
        font-size: 0.65rem;
        padding: 0.4rem 0.5rem;
    }

    .nav-links a::before {
        display: none;
    }

    /* Hero Mobile */
    .hero-section {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-greeting {
        justify-content: center;
    }

    .hero-btns {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-visual {
        display: none;
    }

    .hero-bio {
        font-size: 1rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .section-title {
        margin-bottom: 2rem;
    }

    /* Skills Mobile */
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }

    .skill-card {
        padding: 1.25rem 0.5rem;
    }

    .icon-box {
        font-size: 2rem;
    }

    .skill-card h3 {
        font-size: 0.75rem;
    }

    /* Languages Mobile */
    .languages-grid {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .language-card {
        width: 100%;
        max-width: 280px;
        padding: 1rem 1.5rem;
    }

    /* Timeline Mobile */
    .timeline::after {
        left: 0;
    }

    .timeline-item {
        padding-left: 30px;
    }

    .timeline-marker {
        left: -8px;
    }

    .timeline-content {
        padding: 1rem;
    }

    /* Projects Mobile */
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-media {
        height: 180px;
    }

    .project-content-wrapper {
        padding: 1rem;
    }

    /* Certifications Mobile */
    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .certification-card {
        padding: 1rem;
        gap: 1rem;
    }

    .cert-icon {
        font-size: 1.5rem;
        padding: 0.75rem;
    }

    .cert-content h3 {
        font-size: 1rem;
    }

    /* Education Mobile */
    .education-card {
        padding: 2rem 1.5rem;
    }

    /* Contact Mobile */
    .big-btn {
        padding: 1rem 2rem;
        font-size: 0.9rem;
    }

    /* Buttons Mobile */
    .btn-primary,
    .btn-secondary {
        padding: 0.6rem 1.25rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .hero-section {
        padding: 100px 0 40px;
    }

    .hero-btns {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-btns a {
        width: 100%;
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav-links.always-visible {
        gap: 0.25rem;
    }

    .nav-links.always-visible li a {
        font-size: 0.6rem;
        padding: 0.35rem 0.4rem;
    }

    .section {
        padding: 50px 0;
    }

    .project-media {
        height: 150px;
    }

    .tech-tag {
        font-size: 0.65rem;
    }
}