/* ========================================
   CSS Variables & Root
   ======================================== */
:root {
    /* Colors */
    --color-bg: #0a192f;
    --color-bg-light: #112240;
    --color-bg-lighter: #1d3461;
    --color-primary: #64ffda;
    --color-primary-tint: rgba(100, 255, 218, 0.1);
    --color-text: #ccd6f6;
    --color-text-secondary: #8892b0;
    --color-text-dark: #495670;
    --color-white: #e6f1ff;

    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Sizes */
    --nav-height: 70px;
    --section-padding: 100px;
    --container-width: 1100px;
    --border-radius: 4px;

    /* Transitions */
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
    --transition-slow: all 0.5s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--color-text-dark) var(--color-bg);
}

body {
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

::selection {
    background-color: var(--color-primary-tint);
    color: var(--color-primary);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-dark);
    border-radius: 10px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

.nav.scrolled {
    box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 50px;
    height: 100%;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text);
    transition: var(--transition);
}

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

.nav-number {
    color: var(--color-primary);
    margin-right: 5px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-toggle {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 8px 14px;
    background: none;
    border: 1px solid var(--color-text-secondary);
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
    font-weight: 500;
}

.lang-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.mobile-lang-toggle {
    display: block;
    margin-top: 20px;
    width: 100%;
    padding: 14px;
    text-align: center;
}

.nav-resume {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 10px 16px;
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius);
    color: var(--color-primary);
    transition: var(--transition);
}

.nav-resume:hover {
    background-color: var(--color-primary-tint);
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-bg-light);
    padding: 100px 50px;
    z-index: 999;
    transition: var(--transition-slow);
}

.mobile-menu.active {
    right: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: center;
}

.mobile-nav-link {
    font-family: var(--font-mono);
    font-size: 16px;
    color: var(--color-text);
    display: block;
    padding: 10px;
}

.mobile-resume {
    display: block;
    margin-top: 30px;
    padding: 18px 50px;
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius);
    color: var(--color-primary);
    text-align: center;
    font-family: var(--font-mono);
}

/* ========================================
   Main Content
   ======================================== */
.main {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 50px;
}

.section {
    padding: var(--section-padding) 0;
}

.section-title {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: clamp(26px, 5vw, 32px);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 40px;
    white-space: nowrap;
}

.section-title::after {
    content: '';
    display: block;
    width: 300px;
    height: 1px;
    margin-left: 20px;
    background-color: var(--color-bg-lighter);
}

.section-number {
    font-family: var(--font-mono);
    font-size: clamp(16px, 3vw, 20px);
    font-weight: 400;
    color: var(--color-primary);
    margin-right: 10px;
}

.highlight {
    color: var(--color-primary);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
    padding-top: var(--nav-height);
    position: relative;
}

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

.hero-greeting {
    font-family: var(--font-mono);
    font-size: clamp(14px, 5vw, 16px);
    color: var(--color-primary);
    margin-bottom: 20px;
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(40px, 8vw, 80px);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    margin-bottom: 10px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(30px, 6vw, 60px);
    font-weight: 600;
    color: var(--color-text-secondary);
    line-height: 1.1;
    margin-bottom: 30px;
}

.hero-description {
    max-width: 540px;
    color: var(--color-text-secondary);
    margin-bottom: 50px;
}

.hero-cta {
    display: flex;
    gap: 20px;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: 12px;
    opacity: 0.7;
}

.hero-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Buttons */
.btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 14px;
    padding: 18px 28px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-large {
    padding: 20px 50px;
    font-size: 16px;
}

/* ========================================
   About Section
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 50px;
}

.about-text p {
    margin-bottom: 15px;
    color: var(--color-text-secondary);
}

.about-skills {
    display: grid;
    grid-template-columns: repeat(2, minmax(140px, 200px));
    gap: 10px;
    margin-top: 20px;
}

.about-skills li {
    position: relative;
    padding-left: 20px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.about-skills li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.about-image {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
}

.about-image-placeholder {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    background-color: var(--color-bg-light);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 80px;
    font-weight: 700;
    color: var(--color-primary);
    z-index: 1;
    transition: var(--transition);
}

.about-image-wrapper:hover .about-image-placeholder {
    transform: translate(-5px, -5px);
}

.about-image-border {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius);
    z-index: 0;
    transition: var(--transition);
}

.about-image-wrapper:hover .about-image-border {
    top: 15px;
    left: 15px;
}

/* Education */
.education {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--color-bg-lighter);
}

.education-title {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--color-white);
    margin-bottom: 20px;
}

.education-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.education-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.education-info h4 {
    font-family: var(--font-heading);
    font-size: 18px;
    color: var(--color-white);
    margin-bottom: 5px;
}

.education-degree {
    color: var(--color-text-secondary);
    font-size: 16px;
}

.education-date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-dark);
    margin-top: 5px;
}

/* ========================================
   Experience Section
   ======================================== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-line {
    flex: 1;
    width: 2px;
    background-color: var(--color-bg-lighter);
    margin-top: 10px;
}

.timeline-content {
    flex: 1;
    padding-bottom: 20px;
}

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 5px;
    margin-bottom: 5px;
}

.timeline-title {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--color-white);
}

.timeline-company {
    color: var(--color-primary);
    font-size: 18px;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-dark);
    margin-bottom: 10px;
}

.timeline-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    background-color: var(--color-primary-tint);
    color: var(--color-primary);
    border-radius: 20px;
    margin-bottom: 15px;
}

.timeline-details {
    padding-left: 20px;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--color-text-secondary);
    font-size: 16px;
}

.timeline-details li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.timeline-tags span {
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 4px 12px;
    background-color: var(--color-bg-lighter);
    color: var(--color-text-secondary);
    border-radius: 20px;
}

/* ========================================
   Projects Section
   ======================================== */
.project-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 80px;
    padding: 40px;
    background-color: var(--color-bg-light);
    border-radius: 10px;
}

.project-overline {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.project-title {
    font-family: var(--font-heading);
    font-size: clamp(24px, 4vw, 28px);
    color: var(--color-white);
    margin-bottom: 20px;
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: 25px;
}

.project-case-study {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 25px;
}

.case-study-item h4 {
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.case-study-item p {
    color: var(--color-text-secondary);
    font-size: 15px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.project-tech li {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.project-featured-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-image-placeholder {
    width: 100%;
    padding: 30px;
    background-color: var(--color-bg);
    border-radius: 10px;
    border: 1px solid var(--color-bg-lighter);
}

.architecture-diagram {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.arch-box {
    padding: 12px 16px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-primary);
    text-align: center;
}

.arch-arrow {
    color: var(--color-text-dark);
    font-size: 20px;
}

/* Other Projects */
.projects-other-title {
    font-family: var(--font-heading);
    font-size: 24px;
    color: var(--color-white);
    text-align: center;
    margin-bottom: 40px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.project-card {
    padding: 30px;
    background-color: var(--color-bg-light);
    border-radius: 10px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
}

.project-card-icon {
    color: var(--color-primary);
}

.project-card-links {
    display: flex;
    gap: 15px;
}

.project-card-links a {
    color: var(--color-text-secondary);
    transition: var(--transition);
}

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

.project-card-title {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--color-white);
    margin-bottom: 15px;
}

.project-card-description {
    color: var(--color-text-secondary);
    font-size: 15px;
    flex: 1;
    margin-bottom: 20px;
}

.project-card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-card-tech li {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dark);
}

/* ========================================
   Awards Section
   ======================================== */
.awards-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.awards-subtitle {
    font-family: var(--font-heading);
    font-size: 20px;
    color: var(--color-white);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--color-bg-lighter);
}

.award-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.award-item {
    display: flex;
    gap: 20px;
}

.award-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.award-icon.trophy {
    color: #ffd700;
}

.award-info h4 {
    font-family: var(--font-heading);
    font-size: 16px;
    color: var(--color-white);
    margin-bottom: 5px;
}

.award-info p {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.award-date {
    display: block;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dark);
    margin-top: 5px;
}

.leadership-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.leadership-item {
    padding: 20px;
    background-color: var(--color-bg-light);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-primary);
}

.leadership-item h4 {
    font-family: var(--font-heading);
    font-size: 16px;
    color: var(--color-white);
    margin-bottom: 5px;
}

.leadership-item p {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.leadership-date {
    display: block;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dark);
    margin-top: 8px;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--section-padding) 0;
}

.contact .section-title {
    justify-content: center;
}

.contact .section-title::after {
    display: none;
}

.contact-content {
    margin-top: 20px;
}

.contact-text {
    color: var(--color-text-secondary);
    margin-bottom: 50px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 20px 50px;
    text-align: center;
}

.footer-socials {
    display: none;
    justify-content: center;
    gap: 25px;
    margin-bottom: 20px;
}

.footer-socials a {
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.footer-socials a:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-credit {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-dark);
}

/* ========================================
   Side Elements
   ======================================== */
.side-element {
    position: fixed;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.side-element::after {
    content: '';
    width: 1px;
    height: 90px;
    background-color: var(--color-text-secondary);
}

.side-left {
    left: 40px;
}

.side-right {
    right: 40px;
}

.side-email {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-secondary);
    letter-spacing: 0.1em;
    transition: var(--transition);
}

.side-email:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

.side-socials {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.side-socials a {
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.side-socials a:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* ========================================
   Animations
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Staggered animations for hero */
.hero .reveal:nth-child(1) { transition-delay: 0.1s; }
.hero .reveal:nth-child(2) { transition-delay: 0.2s; }
.hero .reveal:nth-child(3) { transition-delay: 0.3s; }
.hero .reveal:nth-child(4) { transition-delay: 0.4s; }
.hero .reveal:nth-child(5) { transition-delay: 0.5s; }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1080px) {
    .side-element {
        display: none;
    }

    .footer-socials {
        display: flex;
    }

    .section-title::after {
        width: 200px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .nav-container {
        padding: 0 25px;
    }

    .main {
        padding: 0 25px;
    }

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

    .about-image {
        order: -1;
        margin-bottom: 30px;
    }

    .about-image-wrapper {
        max-width: 250px;
    }

    .project-featured {
        grid-template-columns: 1fr;
        padding: 25px;
    }

    .awards-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .timeline {
        padding-left: 0;
    }

    .timeline-item {
        flex-direction: column;
        gap: 15px;
    }

    .timeline-marker {
        flex-direction: row;
        gap: 15px;
    }

    .timeline-line {
        flex: 1;
        height: 2px;
        width: auto;
        margin-top: 0;
        margin-left: 10px;
    }

    .footer {
        padding: 20px 25px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 16px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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

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

    .project-tech,
    .timeline-tags {
        gap: 8px;
    }
}