/* ==========================================================================
   Design System & Custom Properties
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-primary: hsl(222, 20%, 4%);
    --bg-secondary: hsl(222, 18%, 8%);
    --bg-tertiary: hsl(222, 15%, 12%);
    --bg-glass: hsla(222, 20%, 4%, 0.75);
    --border-color: hsla(222, 10%, 60%, 0.08);
    --border-hover: hsla(250, 85%, 65%, 0.25);
    
    --text-primary: hsl(210, 20%, 98%);
    --text-secondary: hsl(210, 12%, 75%);
    --text-muted: hsl(210, 10%, 62%);
    
    --accent-indigo: hsl(250, 85%, 65%);
    --accent-indigo-glow: hsla(250, 85%, 65%, 0.15);
    --accent-teal: hsl(160, 80%, 45%);
    --accent-teal-glow: hsla(160, 80%, 45%, 0.15);
    --accent-gold: hsl(42, 95%, 50%);
    --accent-gold-glow: hsla(42, 95%, 50%, 0.15);
    
    /* Layout & Fonts */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    --max-width: 1200px;
    --header-height: 80px;
    
    /* System Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-spring: all 0.5s cubic-bezier(0.68, -0.6, 0.32, 1.6);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scrollbar-color: var(--accent-indigo) var(--bg-primary); /* thumb color, then track color */
    scrollbar-width: thin; /* options: auto, thin */
}

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

/* Custom WebKit Scrollbar Fallback */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-indigo);
    border-radius: 4px;
    border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-indigo-glow);
}

/* Selection */
::selection {
    background-color: var(--accent-indigo);
    color: #fff;
}

/* Common Typography & Links */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

.font-mono {
    font-family: var(--font-mono);
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    color: var(--accent-indigo);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.5rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 4px;
    background: var(--accent-indigo);
    margin-top: 12px;
    border-radius: 2px;
}

/* ==========================================================================
   Navigation Bar (Header)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.nav-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    font-family: var(--font-sans);
}

.logo-accent {
    color: var(--accent-indigo);
    font-weight: 600;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-toggle .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-spring);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-indigo-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--accent-indigo-glow);
    background-color: hsl(250, 85%, 70%);
}

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

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-indigo);
    transform: translateY(-3px);
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: var(--header-height);
    background: radial-gradient(circle at 50% 30%, hsla(250, 85%, 65%, 0.04) 0%, transparent 60%);
    overflow: hidden;
}

/* Cybergrid Overlay background */
.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: center top;
    pointer-events: none;
    z-index: 1;
}

.hero-container {
    max-width: 800px;
    padding: 0 24px;
    text-align: center;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-teal);
    display: inline-block;
    box-shadow: 0 0 10px var(--accent-teal);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-indigo) 0%, var(--accent-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.scroll-arrow:hover {
    color: var(--text-primary);
}

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

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

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

.about-stats {
    display: flex;
    gap: 20px;
    margin-top: 40px;
}

.stat-card {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-smooth);
}

.stat-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

.stat-num {
    display: block;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.stat-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Terminal Mockup */
.terminal-mock {
    background-color: hsl(222, 20%, 6%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.terminal-header {
    background-color: var(--bg-tertiary);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

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

.term-dot.close { background-color: #ff5f56; }
.term-dot.minimize { background-color: #ffbd2e; }
.term-dot.expand { background-color: #27c93f; }

.terminal-title {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    margin-left: auto;
}

.terminal-body {
    padding: 24px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.term-line {
    color: var(--text-primary);
    margin-bottom: 12px;
}

.term-prompt {
    color: var(--accent-indigo);
}

.term-output {
    margin-bottom: 4px;
}

.font-green {
    color: var(--text-secondary);
}

.terminal-cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background-color: var(--text-secondary);
    vertical-align: middle;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    from, to { background-color: transparent; }
    50% { background-color: var(--text-secondary); }
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.skill-category-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    transition: var(--transition-smooth);
    position: relative;
}

.skill-category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: transparent;
    border-radius: 12px 12px 0 0;
    transition: var(--transition-smooth);
}

.skill-category-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.3);
}

.skill-category-card:hover::before {
    background-color: var(--accent-indigo);
}

/* Special styling for cybersecurity skills */
.skill-category-card.highlight-security {
    border-color: hsla(160, 80%, 45%, 0.15);
    background: radial-gradient(circle at 100% 0%, hsla(160, 80%, 45%, 0.03) 0%, transparent 60%), var(--bg-secondary);
}

.skill-category-card.highlight-security:hover {
    border-color: hsla(160, 80%, 45%, 0.4);
    box-shadow: 0 10px 24px hsla(160, 80%, 45%, 0.08);
}

.skill-category-card.highlight-security:hover::before {
    background-color: var(--accent-teal);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.category-icon {
    color: var(--text-muted);
}

.skill-category-card:hover .category-icon {
    color: var(--accent-indigo);
}

.skill-category-card.highlight-security:hover .category-icon {
    color: var(--accent-teal);
}

.security-accent-color {
    color: var(--accent-teal);
}

.skill-category-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.skill-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-list li {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.skill-category-card:hover .skill-list li {
    border-color: rgba(255, 255, 255, 0.08);
}

.skill-list li:hover {
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border-color: var(--accent-indigo);
}

.skill-category-card.highlight-security .skill-list li:hover {
    border-color: var(--accent-teal);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.project-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.filter-btn {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--accent-indigo);
    border-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 4px 12px var(--accent-indigo-glow);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
    opacity: 1;
    transform: scale(1);
}

.project-card.hidden {
    display: none;
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.project-body {
    padding: 30px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.project-type-tag {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent-indigo);
}

.project-tag-accent {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.project-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.project-tags span {
    font-size: 0.75rem;
    color: var(--text-muted);
    background-color: var(--bg-tertiary);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.btn-card-details {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.btn-card-details:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-indigo);
    color: var(--text-primary);
}

.btn-arrow {
    transition: transform 0.3s var(--transition-smooth);
}

.btn-card-details:hover .btn-arrow {
    transform: translateX(4px);
}

/* Styling specifically for projects under security categories */
.project-card[data-category*="security"] {
    position: relative;
}

.project-card[data-category*="security"]:hover {
    border-color: hsla(160, 80%, 45%, 0.35);
    box-shadow: 0 12px 30px hsla(160, 80%, 45%, 0.08);
}

.project-card[data-category*="security"] .project-type-tag {
    color: var(--accent-teal);
}

.project-card[data-category*="security"] .btn-card-details:hover {
    border-color: var(--accent-teal);
}

/* ==========================================================================
   Overlay Modal System
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(6, 7, 9, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    max-width: 680px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
    z-index: 10;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-content {
    padding: 40px;
}

/* Dynamic modal elements styling */
.modal-project-header {
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.modal-project-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    margin-bottom: 12px;
}

.modal-badge-indigo {
    background-color: var(--accent-indigo-glow);
    border: 1px solid hsla(250, 85%, 65%, 0.3);
    color: var(--accent-indigo);
}

.modal-badge-teal {
    background-color: var(--accent-teal-glow);
    border: 1px solid hsla(160, 80%, 45%, 0.3);
    color: var(--accent-teal);
}

.modal-title {
    font-size: 2rem;
    font-weight: 800;
}

.modal-section-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 20px 0 10px 0;
    font-family: var(--font-mono);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-section-title::before {
    content: '>';
    color: var(--accent-indigo);
}

.modal-teal-title::before {
    content: '>';
    color: var(--accent-teal);
}

.modal-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 16px;
}

.spec-list {
    list-style-type: none;
    margin-bottom: 20px;
}

.spec-list li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.spec-list li::before {
    content: '▪';
    color: var(--accent-indigo);
    font-size: 1.1rem;
    line-height: 1;
}

.modal-actions {
    display: flex;
    gap: 16px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

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

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.info-icon-container {
    width: 44px;
    height: 44px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-indigo);
    transition: var(--transition-smooth);
}

.contact-info-item:hover .info-icon-container {
    border-color: var(--accent-indigo);
    background-color: var(--accent-indigo-glow);
    transform: scale(1.05);
}

.info-details {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.link-highlight:hover {
    color: var(--accent-indigo);
}

.contact-form-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--accent-indigo);
    letter-spacing: 0.05em;
}

.form-group input, .form-group textarea {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    width: 100%;
}

.form-group textarea {
    resize: vertical;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 2px var(--accent-indigo-glow);
}

/* Accessibility: Keyboard Focus Ring */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.filter-btn:focus-visible,
.btn:focus-visible,
.email-click-copy:focus-visible {
    outline: 2px solid var(--accent-indigo);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px var(--accent-indigo-glow);
}

.send-symbol {
    margin-left: 6px;
    transition: transform 0.3s ease;
}

.contact-form button:hover .send-symbol {
    transform: translateX(4px);
}

.form-feedback-msg {
    margin-top: 16px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    display: none;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
}

.form-feedback-msg.success {
    display: block;
    background-color: hsla(160, 80%, 45%, 0.1);
    border: 1px solid hsla(160, 80%, 45%, 0.3);
    color: var(--accent-teal);
}

.form-feedback-msg.error {
    display: block;
    background-color: hsla(0, 80%, 60%, 0.1);
    border: 1px solid hsla(0, 80%, 60%, 0.3);
    color: #ff5f56;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

.footer-meta {
    display: flex;
    gap: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-status-tag {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-teal);
    box-shadow: 0 0 6px var(--accent-teal);
    animation: pulse 2.5s infinite;
}

/* ==========================================================================
   Scroll-reveal Animations (IntersectionObserver target)
   ========================================================================== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .terminal-mock {
        max-width: 550px;
        margin: 0 auto;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* Navigation Bar Mobile Layout */
    .mobile-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        padding: 60px 24px;
        gap: 40px;
        transition: left 0.4s ease;
        border-top: 1px solid var(--border-color);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.25rem;
    }
    
    /* Mobile Toggle Active State Icon */
    .mobile-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .about-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .section-container {
        padding: 60px 16px;
    }
    
    .hero-title {
        font-size: 2.1rem;
    }
    
    .terminal-body {
        padding: 16px;
    }
}

/* ==========================================================================
   Interactive Portfolio Enhancements
   ========================================================================== */

/* Project Impact Metrics Badges */
.project-impact-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: hsla(250, 85%, 65%, 0.1);
    border: 1px solid hsla(250, 85%, 65%, 0.25);
    color: var(--accent-indigo);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    margin-bottom: 14px;
    width: fit-content;
    font-weight: 500;
}

.highlight-security .project-impact-badge,
[id*="secureed"] .project-impact-badge,
[id*="tls"] .project-impact-badge,
[id*="crypto"] .project-impact-badge {
    background: hsla(160, 80%, 45%, 0.1);
    border-color: hsla(160, 80%, 45%, 0.25);
    color: var(--accent-teal);
}

.impact-icon {
    font-size: 0.9rem;
}



/* Interactive Terminal CLI Styles */
.terminal-mock {
    display: flex;
    flex-direction: column;
    max-height: 380px;
}

.terminal-body {
    overflow-y: auto;
    max-height: 280px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    scrollbar-width: thin;
}

.term-hint {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 8px;
    font-style: italic;
}

.terminal-input-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: hsla(222, 20%, 3%, 0.9);
    border-top: 1px solid var(--border-color);
}

.terminal-input-field {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--accent-teal);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.terminal-input-field::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.terminal-submit-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.terminal-submit-btn:hover {
    background: var(--accent-teal);
    color: var(--bg-primary);
    font-weight: bold;
}

/* Project Card Hover & Touch Optimization */
.project-card {
    transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.project-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px var(--accent-indigo-glow);
    border-color: var(--accent-indigo);
}

.filter-btn, .btn {
    min-height: 44px; /* Ensure 44px touch targets on mobile */
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================================================
   UI/UX Pro Max: Cinematic Ambient Lighting & Specular Glass Design System
   ========================================================================== */

/* Ambient Lighting Blobs */
.ambient-glow {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}

.glow-indigo {
    top: 5%;
    left: 15%;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, hsla(250, 85%, 65%, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    filter: blur(100px);
}

.glow-emerald {
    top: 45%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, hsla(160, 80%, 45%, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
    filter: blur(110px);
}

/* Pulse Availability Indicator */
.pulse-dot-green {
    width: 8px;
    height: 8px;
    background-color: var(--accent-teal);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 rgba(16, 185, 129, 0.4);
    animation: pulse-emerald 2s infinite;
}

@keyframes pulse-emerald {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

/* Specular Glass Highlight & Card Styling */
.project-card, .skill-category-card, .modal-container {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.015) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-top: 1px solid rgba(255, 255, 255, 0.16); /* Specular top highlight */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* Cyber Terminal CRT Overlay */
.terminal-mock {
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.terminal-mock::before {
    content: " ";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.2) 50%);
    background-size: 100% 4px;
    pointer-events: none;
    opacity: 0.35;
    z-index: 5;
    border-radius: inherit;
}

/* Accessibility: Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}