/* ===========================
   CSS Variables & Reset
   =========================== */

:root {
    /* Cybersecurity Color Palette */
    --primary-color: #00ff88;
    --secondary-color: #00d4ff;
    --accent-color: #ff0080;
    --bg-dark: #0a0e27;
    --bg-darker: #050812;
    --bg-card: #131829;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    
    /* Glow Effects */
    --glow-primary: 0 0 10px rgba(0, 255, 136, 0.5), 0 0 20px rgba(0, 255, 136, 0.3);
    --glow-secondary: 0 0 10px rgba(0, 212, 255, 0.5), 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-accent: 0 0 10px rgba(255, 0, 128, 0.5), 0 0 20px rgba(255, 0, 128, 0.3);
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ===========================
   Particle Background
   =========================== */

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

/* ===========================
   Loading Screen
   =========================== */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-terminal {
    max-width: 600px;
    width: 90%;
    background: rgba(19, 24, 41, 0.9);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 136, 0.3);
    box-shadow: var(--glow-primary);
}

.loading-terminal-body {
    padding: 2rem;
    min-height: 100px;
}

.loading-line {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

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

.loading-output {
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-top: 1rem;
    text-shadow: var(--glow-primary);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.loading-output.show {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   Navigation
   =========================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 136, 0.1);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    text-shadow: var(--glow-primary);
}

.nav-logo .prompt {
    color: var(--secondary-color);
    margin-right: 0.5rem;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

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

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    position: relative;
    transition: opacity 1s ease, transform 1s ease;
}

.hero.hero-hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.hero.hero-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.hero-content {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.terminal-header {
    display: flex;
    gap: 8px;
    padding: 10px;
    background: rgba(19, 24, 41, 0.8);
    border-radius: 8px 8px 0 0;
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-bottom: none;
}

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

.terminal-button.red {
    background: #ff5f56;
}

.terminal-button.yellow {
    background: #ffbd2e;
}

.terminal-button.green {
    background: #27c93f;
}

.terminal-body {
    background: rgba(19, 24, 41, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-top: none;
    border-radius: 0 0 8px 8px;
    padding: 2rem;
    text-align: left;
}

.terminal-line {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.prompt {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.command {
    color: var(--secondary-color);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin: 1rem 0;
    text-align: center;
    font-family: var(--font-mono);
}

.glitch {
    position: relative;
    color: var(--primary-color);
    text-shadow: var(--glow-primary);
    animation: glitch 3s infinite;
}

@keyframes glitch {
    0%, 90%, 100% {
        transform: translate(0);
    }
    92% {
        transform: translate(-2px, 2px);
    }
    94% {
        transform: translate(2px, -2px);
    }
    96% {
        transform: translate(-2px, -2px);
    }
}

.typing-container {
    min-height: 40px;
    margin: 1rem 0;
    text-align: center;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--secondary-color);
    display: inline-block;
}

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

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

.hero-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin: 1.5rem 0;
    text-align: center;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--bg-dark);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.btn-secondary {
    background: transparent;
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--bg-dark);
    box-shadow: var(--glow-secondary);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    width: 2px;
    height: 15px;
    background: var(--primary-color);
    opacity: 0.5;
}

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

/* ===========================
   Sections Common Styles
   =========================== */

section {
    padding: var(--spacing-xl) 2rem;
    position: relative;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-family: var(--font-mono);
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: inline-block;
}

.title-underline {
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto 1rem;
    box-shadow: var(--glow-primary);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===========================
   About Section
   =========================== */

.about-content {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-intro {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

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

.stat-item {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 136, 0.1);
    text-align: center;
    transition: var(--transition-normal);
}

.stat-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
    transform: translateY(-5px);
}

.stat-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.stat-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===========================
   Skills Section
   =========================== */

.skills {
    background: rgba(19, 24, 41, 0.3);
}

.skills-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 136, 0.1);
    transition: var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.category-title {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: rgba(10, 14, 39, 0.5);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: var(--transition-normal);
    text-align: center;
}

.skill-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--glow-secondary);
    transform: translateY(-5px);
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.skill-card h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.skill-bars {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-bar-item {
    width: 100%;
}

.skill-bar-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.skill-percentage {
    color: var(--primary-color);
}

.skill-bar-bg {
    width: 100%;
    height: 10px;
    background: rgba(10, 14, 39, 0.5);
    border-radius: 10px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    width: 0;
    transition: width 1s ease;
    box-shadow: var(--glow-primary);
}

.skill-bar-fill.animate {
    width: var(--percentage);
}

/* ===========================
   Projects Section
   =========================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 255, 136, 0.1);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition-normal);
}

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

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

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

.project-icon {
    font-size: 2rem;
    color: var(--secondary-color);
}

.project-status {
    background: rgba(0, 255, 136, 0.1);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid var(--primary-color);
}

.project-title {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--secondary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--secondary-color);
    text-shadow: var(--glow-secondary);
}

/* ===========================
   Journey/Timeline Section
   =========================== */

.journey {
    background: rgba(19, 24, 41, 0.3);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-dark);
    box-shadow: var(--glow-primary);
    z-index: 1;
}

.timeline-marker.future {
    background: var(--accent-color);
    box-shadow: var(--glow-accent);
}

.timeline-content {
    width: calc(50% - 40px);
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 136, 0.1);
    transition: var(--transition-normal);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
}

.timeline-content:hover {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
    transform: scale(1.02);
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--secondary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.8rem;
    border: 1px solid rgba(0, 212, 255, 0.3);
}

/* ===========================
   Contact Section
   =========================== */

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 136, 0.1);
    text-align: center;
    transition: var(--transition-normal);
}

.contact-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--glow-primary);
    transform: translateY(-5px);
}

.contact-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-card a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.contact-card a:hover {
    color: var(--primary-color);
    text-shadow: var(--glow-primary);
}

.contact-card p {
    color: var(--text-secondary);
}

.contact-terminal {
    display: flex;
    justify-content: center;
    align-items: center;
}

.terminal-window {
    width: 100%;
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 136, 0.2);
}

.terminal-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: auto;
    font-family: var(--font-mono);
}

.terminal-output {
    color: var(--text-secondary);
    margin-left: 1.5rem;
}

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

/* ===========================
   Footer
   =========================== */

.footer {
    background: rgba(5, 8, 18, 0.8);
    padding: 2rem;
    border-top: 1px solid rgba(0, 255, 136, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: var(--text-secondary);
}

.heart {
    color: var(--accent-color);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--secondary-color);
    text-shadow: var(--glow-secondary);
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 968px) {
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
    }
    
    .timeline-marker {
        left: 20px;
        transform: translateX(-50%);
    }
    
    .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        width: 100%;
        text-align: center;
        transition: var(--transition-normal);
        padding: 2rem;
        gap: 1rem;
        border-top: 1px solid rgba(0, 255, 136, 0.2);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skill-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    section {
        padding: var(--spacing-lg) 1rem;
    }
    
    .terminal-body {
        padding: 1rem;
    }
}

/* ===========================
   Animations & Effects
   =========================== */

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

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ===========================
   Accessibility
   =========================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===========================
   Print Styles
   =========================== */

@media print {
    #particles-js,
    .navbar,
    .scroll-indicator,
    .hero-buttons {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}