/* ============================================
   CSS CUSTOM PROPERTIES (Dark Theme = default)
   ============================================ */
:root {
    --bg-primary: #050505;
    --bg-secondary: #0f0f0f;
    --bg-card: rgba(15, 15, 15, 0.6);
    --bg-nav: rgba(5, 5, 5, 0.95);
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent: #800020;
    --accent-secondary: #600018;
    --accent-blue: #a31535;
    --border-accent: rgba(128, 0, 32, 0.2);
    --border-accent-strong: rgba(128, 0, 32, 0.3);
    --shadow-accent: rgba(128, 0, 32, 0.1);
    --shadow-dark: rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #f0f0f0;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-nav: rgba(250, 250, 250, 0.95);
    --text-primary: #000000;
    --text-secondary: #000000;
    --accent: #800020;
    --accent-secondary: #600018;
    --accent-blue: #a31535;
    --border-accent: rgba(128, 0, 32, 0.2);
    --border-accent-strong: rgba(128, 0, 32, 0.35);
    --shadow-accent: rgba(128, 0, 32, 0.1);
    --shadow-dark: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Courier New', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.4s ease;
}

a:visited {
    color: inherit;
}

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

/* Animated background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: linear-gradient(45deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    transition: background 0.4s ease;
}

#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.6;
}

/* ============================================
   NAVIGATION
   ============================================ */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-nav);
    backdrop-filter: blur(10px);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-bottom: 1px solid var(--border-accent);
    transition: background 0.4s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    text-shadow: 0 0 10px var(--shadow-accent);
}

.logo a {
    color: var(--accent) !important;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    padding: 0.5rem 0;
    display: inline-block;
}

.nav-links a:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-accent-strong);
    color: var(--accent);
    cursor: pointer;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 0 15px var(--shadow-accent);
    transform: rotate(30deg);
}

/* Hamburger Toggle Button */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 36px;
    height: 36px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-blue));
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-origin: center;
}

nav.nav-open .nav-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

nav.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

nav.nav-open .nav-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Page Headers */
.page-hero {
    background: rgba(5, 5, 5, 0.8);
    padding: 8rem 5% 4rem;
    text-align: center;
    border-bottom: 1px solid var(--border-accent);
    margin-bottom: 3rem;
}

[data-theme="light"] .page-hero {
    background: rgba(250, 250, 250, 0.8);
}

.page-title {
    font-size: 3.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    text-shadow: 0 0 15px var(--shadow-accent);
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

.listing-container {
    padding: 0 5% 6rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Post Page Styles */
.post-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 10rem 5% 6rem;
}

.post-header {
    margin-bottom: 4rem;
}

.post-breadcrumb {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.post-breadcrumb a {
    color: var(--accent);
    text-decoration: none;
}

.post-breadcrumb span {
    margin: 0 0.5rem;
    opacity: 0.5;
}

.post-cover {
    width: 100%;
    margin-bottom: 3rem;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-accent-strong);
    box-shadow: 0 10px 30px var(--shadow-dark);
}

.post-cover img {
    width: 100%;
    height: auto;
    display: block;
}

.post-title {
    font-size: 3.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.post-meta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.post-tags {
    display: flex;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.tag-link {
    text-decoration: none;
}

/* Markdown Content Styling */
.post-content {
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.post-content h1, .post-content h2, .post-content h3 {
    color: var(--accent-secondary);
    margin: 2.5rem 0 1.5rem;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
    padding-bottom: 0.5rem;
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content ul, .post-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content blockquote {
    background: rgba(0, 255, 157, 0.05);
    border-left: 4px solid var(--accent);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 5px 5px 0;
}

.post-content blockquote p {
    margin-bottom: 0;
    font-style: italic;
    color: var(--text-secondary);
}

.post-content hr {
    border: none;
    border-top: 1px solid var(--border-accent);
    margin: 3rem 0;
}

.post-footer {
    margin-top: 6rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-accent);
    text-align: center;
}

.related-posts {
    margin-top: 6rem;
}

/* ============================================
   TERMINAL HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5%;
    text-align: center;
    gap: 2rem;
}

.hero-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.terminal-hero {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-accent-strong);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px var(--shadow-accent);
    animation: terminalGlow 3s ease-in-out infinite alternate;
}

@keyframes terminalGlow {
    0% { box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 20px var(--shadow-accent); }
    100% { box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px var(--shadow-accent); }
}

.terminal-bar {
    background: #1e1e2e;
    padding: 0.8rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .terminal-bar {
    background: #e0e0e0;
}

.terminal-dots {
    display: flex;
    gap: 0.5rem;
}

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

.dot-red { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #28c840; }

.terminal-title {
    color: #ffffff;
    font-size: 0.85rem;
    font-family: 'Courier New', monospace;
}

.terminal-body {
    background: #0a0a0a;
    padding: 2rem;
    min-height: 280px;
    text-align: left;
    font-family: 'Courier New', monospace;
    font-size: 1.05rem;
    line-height: 2;
}

[data-theme="light"] .terminal-body {
    background: #1a1a1a;
}

.terminal-line {
    opacity: 0;
    transform: translateY(5px);
    white-space: nowrap;
    overflow: hidden;
}

.terminal-line.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.prompt {
    color: var(--accent);
    font-weight: bold;
}

.command {
    color: #ffffff;
}

.output {
    color: var(--accent-blue);
    padding-left: 0.5rem;
}

.cursor-blink {
    color: var(--accent);
    animation: blink 1s step-end infinite;
    font-weight: bold;
}

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

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
    text-decoration: none;
    font-size: 1.1rem;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    border-radius: 50px;
    box-shadow: 0 0 15px var(--shadow-accent);
    font-family: 'Courier New', monospace;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent);
    transition: left 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: -1;
}

.cta-button:hover::before {
    left: 0;
}

.cta-button:hover {
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--shadow-accent), 0 0 40px var(--shadow-accent);
    transform: translateY(-3px);
}

.cta-secondary {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    box-shadow: 0 0 15px rgba(163, 21, 53, 0.1);
}

.cta-secondary::before {
    background: var(--accent-blue);
}

.cta-secondary:hover {
    box-shadow: 0 0 20px rgba(163, 21, 53, 0.3);
}

/* ============================================
   SECTION STYLES
   ============================================ */
section {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.skill-category:hover {
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow-accent);
    transform: translateY(-5px);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.skill-category-header i {
    font-size: 1.5rem;
    color: var(--accent);
}

.skill-category-header h3 {
    font-size: 1.2rem;
    color: var(--accent-secondary);
    margin: 0;
}

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    background: rgba(128, 0, 32, 0.06);
    border: 1px solid var(--border-accent);
    border-radius: 20px;
    font-size: 0.88rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.skill-badge:hover {
    background: rgba(128, 0, 32, 0.15);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-accent);
}

.skill-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ============================================
   TIMELINE SECTION
   ============================================ */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, transparent, var(--accent), var(--accent-blue), transparent);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.timeline-item[data-side="left"] {
    padding-right: 3rem;
    text-align: right;
}

.timeline-item[data-side="right"] {
    left: 50%;
    padding-left: 3rem;
    text-align: left;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    top: 2rem;
    box-shadow: 0 0 15px var(--accent), 0 0 30px var(--shadow-accent);
}

.timeline-item[data-side="left"] .timeline-dot {
    right: -8px;
}

.timeline-item[data-side="right"] .timeline-dot {
    left: -8px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 10px;
    padding: 1.5rem;
    transition: all 0.4s ease;
}

.timeline-content:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 25px var(--shadow-accent);
    transform: translateY(-3px);
}

.timeline-date {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--accent-blue));
    color: #e0e0e0;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 0.8rem;
}

.timeline-content h3 {
    color: var(--accent-secondary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    padding: 2rem;
    border-radius: 10px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow-accent);
}

.project-card h3 {
    color: var(--accent-secondary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project-view-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.project-card:hover .project-view-link {
    transform: translateX(5px);
}

.tag {
    padding: 0.3rem 0.8rem;
    background: rgba(128, 0, 32, 0.1);
    color: var(--accent);
    border: 1px solid var(--border-accent-strong);
    border-radius: 20px;
    font-size: 0.85rem;
}

/* ============================================
   CTF ACHIEVEMENTS
   ============================================ */
.ctf-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.ctf-item {
    background: var(--bg-card);
    border-left: 4px solid var(--accent);
    padding: 2rem;
    border-radius: 5px;
    transition: all 0.3s;
}

.ctf-item:hover {
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow-accent);
    transform: translateY(-5px);
}

[data-theme="light"] .ctf-item:hover {
    background: rgba(255, 255, 255, 0.95);
}

.ctf-item h3 {
    color: var(--accent-secondary);
    margin-bottom: 0.5rem;
}

.ctf-item .rank {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: bold;
}

/* ============================================
   CERTIFICATIONS
   ============================================ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid rgba(128, 0, 32, 0.3);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

.cert-card:hover {
    border-color: var(--accent-secondary);
    transform: scale(1.05);
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cert-card h3 {
    color: var(--accent-secondary);
    margin-bottom: 0.5rem;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 1.2rem;
    padding: 1rem 2rem;
    border: 2px solid var(--accent);
    border-radius: 5px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.contact-link:hover {
    background: var(--accent);
    color: var(--bg-primary);
    transform: translateY(-3px);
    box-shadow: 0 0 20px var(--shadow-accent);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: var(--bg-primary);
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    font-weight: bold;
    transition: all 0.3s;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    box-shadow: 0 4px 15px var(--shadow-accent);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px var(--shadow-accent);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    text-align: center;
    padding: 2rem;
    background: var(--bg-nav);
    color: var(--text-secondary);
    border-top: 1px solid var(--border-accent);
    transition: background 0.4s ease;
}

/* ============================================
   WRITEUPS AND WALKTHROUGHS
   ============================================ */
.writeups-grid, .walkthroughs-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.writeup-card, .walkthrough-card {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 10px;
    padding: 2rem;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.writeup-card:hover, .walkthrough-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow-accent);
}

.writeup-header, .walkthrough-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.writeup-header h3, .walkthrough-header h3 {
    color: var(--accent-secondary);
    font-size: 1.5rem;
    margin: 0;
    flex: 1;
}

.writeup-category, .walkthrough-category {
    background: rgba(128, 0, 32, 0.1);
    color: var(--accent-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 5px;
    font-size: 0.85rem;
    border: 1px solid rgba(128, 0, 32, 0.3);
    white-space: nowrap;
}

.card-title-link {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.card-title-link:visited {
    color: var(--accent);
}

.card-title-link:hover {
    color: var(--accent-blue);
}

.writeup-description, .walkthrough-description {
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.writeup-tags, .walkthrough-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.writeup-footer, .walkthrough-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(128, 0, 32, 0.1);
}

.writeup-footer .cta-button, .walkthrough-footer .cta-button {
    color: #ffffff;
}

/* ============================================
   STAGGERED SCROLL ANIMATIONS
   ============================================ */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   404 ERROR PAGE — "YOU'VE BEEN HACKED"
   ============================================ */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.error-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(128, 0, 32, 0.03) 0px,
        rgba(128, 0, 32, 0.03) 1px,
        transparent 1px,
        transparent 3px
    );
    pointer-events: none;
    animation: scanLines 0.1s linear infinite;
    z-index: 1;
}

@keyframes scanLines {
    0% { transform: translateY(0); }
    100% { transform: translateY(3px); }
}

.error-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.error-code {
    font-size: 10rem;
    font-weight: 900;
    color: var(--accent);
    text-shadow: 
        0 0 20px var(--accent),
        0 0 40px var(--accent),
        0 0 80px var(--accent);
    line-height: 1;
    margin-bottom: 1rem;
    animation: glitch404 3s infinite;
    position: relative;
}

@keyframes glitch404 {
    0%, 90%, 100% { 
        transform: translate(0); 
        text-shadow: 0 0 20px var(--accent), 0 0 40px var(--accent);
    }
    91% { 
        transform: translate(-5px, 3px); 
        text-shadow: 5px 0 var(--accent), -5px 0 #555;
    }
    93% { 
        transform: translate(5px, -3px); 
        text-shadow: -5px 0 var(--accent), 5px 0 #555;
    }
    95% { 
        transform: translate(-3px, -3px); 
        text-shadow: 3px 0 var(--accent), -3px 0 #555;
    }
}

.error-content h1 {
    font-size: 2.5rem;
    color: #ff0040;
    text-transform: uppercase;
    letter-spacing: 0.3rem;
    margin-bottom: 1rem;
    animation: flicker 2s infinite;
}

@keyframes flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
    52% { opacity: 0.4; }
    54% { opacity: 0.8; }
}

.error-content > p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.error-terminal {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--border-accent-strong);
    border-radius: 8px;
    padding: 1.5rem 2rem;
    text-align: left;
    font-family: 'Courier New', monospace;
    margin: 2rem auto;
    max-width: 550px;
    line-height: 2;
}

.error-terminal .terminal-prompt {
    color: var(--accent);
    font-weight: bold;
}

.error-terminal .terminal-cmd {
    color: #e0e0e0;
}

.error-terminal .terminal-error {
    color: #ff0040;
}

.error-terminal .terminal-warning {
    color: #ffbd2e;
}

.error-terminal .terminal-success {
    color: var(--accent);
}

.matrix-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.15;
}

/* ============================================
   RESPONSIVE MEDIA QUERIES
   ============================================ */

@media (max-width: 1024px) {
    .hero-content h1 { font-size: 3.5rem; }
    .hero-content h2 { font-size: 1.8rem; }
    .hero-wrapper { gap: 2rem; }
    section { padding: 5rem 5%; }
    h2 { font-size: 2.2rem; }
    .terminal-body { font-size: 0.95rem; }
}

@media (max-width: 768px) {
    /* --- Hamburger nav --- */
    .nav-toggle {
        display: flex;
    }

    nav {
        padding: 1rem 5%;
        flex-wrap: nowrap;
        justify-content: space-between;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-nav);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-accent);
        padding: 1rem 0;
        gap: 0;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }

    nav.nav-open .nav-links {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        width: 100%;
        padding: 0.9rem 2rem;
        font-size: 1.05rem;
        border-left: 3px solid transparent;
        transition: all 0.25s ease;
    }

    .nav-links a:hover {
        background: rgba(0, 255, 157, 0.08);
        border-left-color: var(--accent);
        color: var(--accent);
        transform: none;
    }

    .nav-links a::after {
        display: none;
    }

    .logo { font-size: 1.3rem; }

    /* --- Layout --- */
    .hero { padding: 7rem 5% 3rem; min-height: auto; }
    .terminal-body { font-size: 0.85rem; padding: 1.5rem; min-height: 240px; }
    .terminal-line { white-space: normal; }
    section { padding: 4rem 3%; }
    h2 { font-size: 2rem; margin-bottom: 2rem; }
    h2::after { width: 80px; }
    .skills-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
    .projects-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .cert-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
    .project-card, .writeup-card, .walkthrough-card, .cert-card { padding: 1.5rem; }
    .project-card h3, .writeup-header h3, .walkthrough-header h3 { font-size: 1.3rem; }
    .ctf-item { padding: 1.5rem; }
    .ctf-item:hover { transform: translateX(5px); }
    .contact-links { gap: 1rem; flex-direction: column; align-items: center; }
    .contact-link { font-size: 1rem; padding: 0.8rem 1.5rem; width: 100%; max-width: 300px; text-align: center; }
    .project-card:hover, .writeup-card:hover, .walkthrough-card:hover { transform: translateY(-5px); }
    .cert-card:hover { transform: scale(1.02); }
    .page-title { font-size: 2.5rem; }
    .post-title { font-size: 2.5rem; }
    .post-page { padding: 7rem 4% 4rem; }

    /* Timeline Mobile */
    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item[data-side="left"],
    .timeline-item[data-side="right"] {
        width: 100%;
        left: 0;
        padding-left: 50px;
        padding-right: 1rem;
        text-align: left;
    }

    .timeline-item[data-side="left"] .timeline-dot,
    .timeline-item[data-side="right"] .timeline-dot {
        left: 12px;
        right: auto;
    }

    .error-code { font-size: 6rem; }
    .error-content h1 { font-size: 1.8rem; letter-spacing: 0.15rem; }
}

@media (max-width: 480px) {
    .logo { font-size: 1.2rem; }
    .nav-links a { padding: 0.8rem 1.5rem; font-size: 0.95rem; }
    .hero { padding: 6rem 3% 2rem; }
    .terminal-body { font-size: 0.78rem; padding: 1rem; min-height: 220px; }
    .cta-button { padding: 0.7rem 1.2rem; font-size: 0.9rem; }
    section { padding: 3rem 2%; }
    h2 { font-size: 1.6rem; margin-bottom: 1.5rem; }
    h2::after { width: 60px; height: 2px; }
    .page-title { font-size: 1.8rem; }
    .page-hero { padding: 6rem 3% 3rem; }
    .post-title { font-size: 1.8rem; }
    .post-page { padding: 6rem 3% 3rem; }
    .cert-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
    .writeup-header, .walkthrough-header { flex-direction: column; }
    .writeup-footer, .walkthrough-footer { flex-direction: column; gap: 1rem; align-items: flex-start; }
    .error-code { font-size: 4rem; }
    .error-content h1 { font-size: 1.4rem; }
    .error-terminal { font-size: 0.8rem; padding: 1rem; }
}

@media (max-width: 360px) {
    nav { padding: 0.8rem 3%; }
    .logo { font-size: 1.1rem; }
    section { padding: 2.5rem 2%; }
    h2 { font-size: 1.4rem; }
    .page-title { font-size: 1.5rem; }
    .post-title { font-size: 1.5rem; }
    .terminal-body { font-size: 0.72rem; }
}