/* ========== CSS Variables ========== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --border-color: #27272a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-main: 'Poppins', sans-serif;
    --font-code: 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.highlight {
    color: var(--accent-primary);
    font-weight: 500;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* ========== Section Titles ========== */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
    max-width: 300px;
}

.title-number {
    color: var(--accent-primary);
    font-family: var(--font-code);
    font-size: 1.25rem;
    font-weight: 400;
}

.section-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-top: -2rem;
    margin-bottom: 2rem;
}

/* ========== Navigation ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    padding: 10px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-code);
}

.logo-bracket {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

/* ========== Hero Section ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 20px;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.6;
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent-primary);
    font-family: var(--font-code);
    margin-bottom: 10px;
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-name {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 15px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-title {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    margin-bottom: 25px;
    min-height: 2em;
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

.typing-text {
    color: var(--text-primary);
}

.cursor {
    color: var(--accent-primary);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 35px;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease 0.6s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease 0.8s forwards;
    opacity: 0;
}

.hero-socials {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 0.6s ease 1s forwards;
    opacity: 0;
}

.social-link {
    width: 45px;
    height: 45px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.social-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: fadeInUp 0.6s ease 1.2s forwards;
    opacity: 0;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}

.scroll-indicator span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ========== About Section ========== */
.about {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.image-wrapper {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--accent-primary);
    position: relative;
    z-index: 2;
    transition: transform var(--transition-normal);
}

.image-border {
    position: absolute;
    top: 15px;
    left: 15px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--accent-primary);
    border-radius: 10px;
    z-index: 1;
    transition: all var(--transition-normal);
}

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

.image-wrapper:hover .image-border {
    top: 20px;
    left: 20px;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.about-info {
    display: flex;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.info-item i {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

/* ========== Skills Section ========== */
.skills {
    padding: 100px 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.skill-category {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.skill-category h3 i {
    color: var(--accent-primary);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    display: grid;
    grid-template-columns: 40px 80px 1fr;
    align-items: center;
    gap: 15px;
}

.skill-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-primary);
}

.skill-item span {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.skill-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    width: 0;
    transition: width 1s ease;
}

/* ========== Projects Section ========== */
.projects {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-primary);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-xl);
}

.project-image {
    height: 200px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-icon {
    font-size: 4rem;
    color: var(--accent-primary);
    transition: all var(--transition-normal);
}

.project-card:hover .project-icon {
    transform: scale(0.8);
    opacity: 0.3;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(99, 102, 241, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-content {
    padding: 25px;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.project-tech {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.project-tech span {
    background: var(--bg-tertiary);
    color: var(--accent-secondary);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-family: var(--font-code);
}

.project-links {
    display: flex;
    gap: 12px;
}

/* ========== Resume Section ========== */
.resume {
    padding: 100px 0;
}

.resume-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: start;
}

.resume-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.resume-header {
    margin-bottom: 25px;
}

.resume-header i {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: 15px;
}

.resume-header h3 {
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.resume-header p {
    color: var(--text-secondary);
}

.resume-sections {
    margin-bottom: 25px;
}

.resume-section {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.resume-section:last-child {
    border-bottom: none;
}

.resume-section h4 {
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.resume-section p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.btn-download {
    width: 100%;
}

.resume-timeline {
    position: relative;
    padding-left: 30px;
}

.resume-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

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

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

.timeline-dot {
    position: absolute;
    left: -34px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
}

.timeline-content {
    background: var(--bg-secondary);
    padding: 20px 25px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.timeline-date {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-family: var(--font-code);
}

.timeline-content h4 {
    font-size: 1.1rem;
    margin: 8px 0;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========== Contact Section ========== */
.contact {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.contact-intro {
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: -2rem auto 3rem;
    font-size: 1.1rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 50px;
}

.contact-form {
    background: var(--bg-primary);
    padding: 35px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.btn-submit {
    width: 100%;
    padding: 16px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    background: var(--bg-primary);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.info-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.info-card i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.info-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.info-card a,
.info-card span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.info-card a:hover {
    color: var(--accent-primary);
}

/* ========== Footer ========== */
.footer {
    padding: 50px 0 30px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

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

.footer-logo {
    font-size: 1.3rem;
    font-weight: 600;
    font-family: var(--font-code);
    margin-bottom: 20px;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 25px;
}

.footer-socials a {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

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

.footer-text {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.footer-copyright {
    color: var(--text-secondary);
    opacity: 0.6;
    font-size: 0.85rem;
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ========== Responsive Design ========== */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-info {
        justify-content: center;
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        transition: right var(--transition-normal);
    }

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

    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .section-title {
        font-size: 1.6rem;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .skill-item {
        grid-template-columns: 35px 60px 1fr;
        gap: 10px;
    }

    .hero-name {
        font-size: 2rem;
    }

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