/* ===================================
   PENTESTER PORTFOLIO - MAIN STYLES
   Dark Cybersecurity Theme
   =================================== */

/* CSS Variables for Theming */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #0a0e27;
    --color-bg-secondary: #1a1d35;
    --color-bg-tertiary: #252945;
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #808080;
    
    /* Accent Colors - Enhanced Cybersecurity Neon */
    --color-accent-green: #00ff88;
    --color-accent-purple: #ffffff;
    --color-accent-orange: #ff6600;
    --color-accent-red: #ff0040;
    --color-accent-magenta: #8000ff;
    
    /* Status Colors */
    --color-success: #00ff88;
    --color-warning: #ffaa00;
    --color-error: #ff0040;
    --color-info: #00aaff;
    
    /* Typography */
    --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --font-heading: 'Montserrat', 'Roboto', sans-serif;
    
    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 255, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 255, 0, 0.15);
    --shadow-lg: 0 10px 15px rgba(0, 255, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 255, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-tooltip: 1050;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */

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

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

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

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.lead {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--color-text-primary);
}

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

a:hover {
    color: var(--color-accent-green);
}

code {
    font-family: var(--font-mono);
    background-color: var(--color-bg-tertiary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
    color: var(--color-accent-green);
}

/* ===================================
   LAYOUT
   =================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-purple), var(--color-accent-orange));
    margin: var(--spacing-md) auto 0;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-sticky);
    border-bottom: 1px solid rgba(0, 255, 0, 0.1);
}

/* ===================================
   MAIN CONTENT
   =================================== */

/* Fix fixed header overlap for article pages */
main#main-content {
    padding-top: 80px;
}

.navbar {
    padding: var(--spacing-md) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent-green);
    transition: all var(--transition-base);
}

.nav-brand .logo:hover {
    text-shadow: 0 0 10px var(--color-accent-green);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-accent-green);
    transition: width var(--transition-base);
}

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

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-accent-green);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background-color: var(--color-accent-green);
    transition: all var(--transition-base);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-accent-green);
    color: var(--color-accent-green);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-mono);
}

.lang-toggle:hover {
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    z-index: -1;
}

.matrix-effect {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, var(--color-accent-green) 2px, var(--color-accent-green) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, var(--color-accent-green) 2px, var(--color-accent-green) 4px);
    background-size: 50px 50px;
    animation: matrix-scroll 20s linear infinite;
}

@keyframes matrix-scroll {
    0% { transform: translateY(0); }
    100% { transform: translateY(50px); }
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(90deg, var(--color-accent-purple), var(--color-accent-orange), var(--color-accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-social {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

.hero-social a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-accent-green);
    border-radius: var(--radius-full);
    color: var(--color-accent-green);
    font-size: var(--font-size-xl);
    transition: all var(--transition-base);
}

.hero-social a:hover {
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: var(--font-size-2xl);
    color: var(--color-accent-green);
}

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

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-accent-green);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--color-accent-purple);
    color: var(--color-bg-primary);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* ===================================
   ABOUT SECTION
   =================================== */

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.stat-card {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid rgba(0, 255, 0, 0.2);
    transition: all var(--transition-base);
}

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

.stat-card i {
    font-size: var(--font-size-3xl);
    color: var(--color-accent-green);
    margin-bottom: var(--spacing-md);
}

.stat-card h3 {
    font-size: var(--font-size-4xl);
    color: var(--color-accent-purple);
    margin-bottom: var(--spacing-sm);
}

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

/* ===================================
   PROJECTS SECTION
   =================================== */

.project-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 1px solid rgba(0, 255, 0, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-mono);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-green);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(0, 255, 0, 0.1);
    transition: all var(--transition-base);
}

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

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background-color: var(--color-bg-tertiary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.btn-view {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.project-content {
    padding: var(--spacing-xl);
}

.project-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-purple);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.project-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    color: var(--color-accent-green);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-family: var(--font-mono);
    border: 1px solid rgba(0, 255, 0, 0.3);
}

/* ===================================
   SKILLS SECTION
   =================================== */

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.skill-category {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 255, 0, 0.2);
    transition: all var(--transition-base);
}

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

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-accent-purple);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

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

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-badge {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    border: 1px solid rgba(0, 255, 0, 0.3);
    transition: all var(--transition-fast);
}

.skill-badge:hover {
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
}

/* ===================================
   BLOG SECTION
   =================================== */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.blog-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 255, 0, 0.1);
    transition: all var(--transition-base);
}

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

.blog-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.blog-date {
    color: var(--color-text-muted);
}

.blog-category {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    color: var(--color-accent-green);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
}

.blog-card h3 {
    color: var(--color-accent-purple);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-accent-green);
    font-weight: 600;
    margin-top: var(--spacing-md);
}

.blog-link:hover {
    gap: var(--spacing-md);
}

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

/* ===================================
   CONTACT SECTION
   =================================== */

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.contact-item i {
    font-size: var(--font-size-2xl);
    color: var(--color-accent-green);
    margin-top: var(--spacing-xs);
}

.contact-item h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.contact-item a {
    color: var(--color-text-secondary);
}

.contact-form {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 255, 0, 0.2);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-bg-primary);
    border: 1px solid rgba(0, 255, 0, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-green);
    box-shadow: 0 0 0 3px rgba(0, 255, 0, 0.1);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background-color: var(--color-bg-primary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid rgba(0, 255, 0, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand h3 {
    font-family: var(--font-mono);
    color: var(--color-accent-green);
    margin-bottom: var(--spacing-md);
}

.footer-links h4,
.footer-social h4 {
    color: var(--color-accent-purple);
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-accent-green);
    border-radius: var(--radius-full);
    color: var(--color-accent-green);
    transition: all var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(0, 255, 0, 0.1);
    color: var(--color-text-muted);
}

.footer-bottom i {
    color: var(--color-accent-red);
}

/* ===================================
   BACK TO TOP BUTTON
   =================================== */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

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

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

/* ===================================
   ACCESSIBILITY
   =================================== */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background-color: var(--color-accent-green);
    color: var(--color-bg-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 0;
}

/* Focus styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-accent-green);
    outline-offset: 2px;
}