/* =====================
   CSS Variables
   ===================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --border-color: #2a2a3e;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-code: 'Fira Code', monospace;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* =====================
   Navigation Bar
   ===================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.98);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-code);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

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

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

.nav-menu {
    display: flex;
    gap: 40px;
}

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

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

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

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

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

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

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

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

/* =====================
   Home Section
   ===================== */
.home-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
    position: relative;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
        var(--bg-primary);
}

.home-container {
    max-width: var(--container-width);
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.home-content {
    animation: fadeInUp 1s ease;
}

.greeting {
    font-size: 1.1rem;
    color: var(--accent-primary);
    font-family: var(--font-code);
    margin-bottom: 10px;
}

.name {
    font-size: 4rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    line-height: 1.2;
}

.typing-container {
    height: 35px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.typing-text {
    font-size: 1.4rem;
    color: var(--text-secondary);
    font-family: var(--font-code);
}

.cursor {
    font-size: 1.4rem;
    color: var(--accent-primary);
    animation: blink 1s infinite;
}

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

.intro {
    font-size: 1.1rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 15px;
}

.intro-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 550px;
    margin-bottom: 30px;
    line-height: 1.8;
}

.home-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-3px);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.social-links a {
    color: var(--text-muted);
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    color: var(--accent-primary);
    transform: translateY(-3px);
}

/* Code Block Animation */
.home-image {
    animation: fadeInRight 1s ease;
}

.code-block {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.code-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    gap: 8px;
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.code-content {
    padding: 20px;
    font-family: var(--font-code);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-secondary);
    overflow-x: auto;
}

.keyword { color: #ff79c6; }
.class-name { color: #8be9fd; }
.method { color: #50fa7b; }
.string { color: #f1fa8c; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    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; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-indicator p {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* =====================
   Section Title
   ===================== */
.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.title-number {
    font-family: var(--font-code);
    color: var(--accent-primary);
    font-size: 1.2rem;
}

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

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

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.8;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

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

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.stat-card h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
    font-weight: 500;
}

.stat-card p {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
}

/* =====================
   Skills Section
   ===================== */
.skills-section {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.skills-container {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.category-title {
    font-size: 1.2rem;
    color: var(--accent-secondary);
    margin-bottom: 25px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-title::before {
    content: '//';
    font-family: var(--font-code);
    color: var(--text-muted);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.skill-card {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.skill-card:hover::before {
    transform: scaleX(1);
}

.skill-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
}

.skill-icon svg {
    width: 100%;
    height: 100%;
}

.dsa-icon, .nodejs-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-code);
}

.skill-card h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.skill-progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease;
}

.skill-card.animate .skill-progress {
    width: var(--progress);
}

.skill-percent {
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-family: var(--font-code);
    font-weight: 500;
}

/* =====================
   Projects Section
   ===================== */
.projects-section {
    padding: var(--section-padding);
    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);
    padding: 35px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    position: relative;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.project-card.featured {
    border-color: var(--accent-secondary);
    border-width: 2px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05), transparent);
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 25px;
}

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

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

.project-link {
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-primary);
    transform: translateY(-3px);
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--accent-primary);
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 25px;
    flex-grow: 1;
}

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

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: auto;
}

.project-tech span {
    font-size: 0.8rem;
    font-family: var(--font-code);
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

/* =====================
   Contact Section
   ===================== */
.contact-section {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-text h3 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.contact-card {
    background: var(--bg-secondary);
    padding: 40px 50px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    text-align: center;
    min-width: 250px;
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.1);
}

.contact-icon {
    color: var(--accent-primary);
    margin-bottom: 20px;
}

.contact-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

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

/* =====================
   Footer
   ===================== */
.footer {
    background: var(--bg-secondary);
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.footer-tech {
    font-size: 0.85rem !important;
    color: var(--text-secondary) !important;
}

.footer-copyright {
    font-size: 0.8rem !important;
}

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

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* =====================
   Responsive Design
   ===================== */
@media (max-width: 992px) {
    .home-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .home-content {
        order: 1;
    }
    
    .home-image {
        order: 2;
    }
    
    .name {
        font-size: 3rem;
    }
    
    .intro-description {
        margin: 0 auto 30px;
    }
    
    .home-buttons {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .name {
        font-size: 2.5rem;
    }
    
    .typing-text {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-card {
        width: 100%;
        max-width: 350px;
    }
    
    .code-block {
        display: none;
    }
}

@media (max-width: 480px) {
    .name {
        font-size: 2rem;
    }
    
    .home-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        padding: 25px;
    }
}