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

:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #3fb950;
    --accent-hover: #2ea043;
    --secondary-bg: #161b22;
    --border-color: #30363d;
    --font-mono: 'Consolas', 'Courier New', monospace;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

/* Matrix Canvas for 404 Page */
#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    opacity: 0.15;
    pointer-events: none;
}

/* Subtle Scanlines effect for hacker aesthetic */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(
        to bottom,
        rgba(255,255,255,0),
        rgba(255,255,255,0) 50%,
        rgba(0,0,0,0.1) 50%,
        rgba(0,0,0,0.1)
    );
    background-size: 100% 4px;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.3;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

/* Navigation */
header {
    margin-bottom: 4rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

.cursor {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

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

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-color);
    text-decoration: none;
}

.nav-links a.active::before {
    content: "> ";
    color: var(--accent-color);
}

/* Typography & Hero */
.greeting {
    color: #8b949e;
    margin-bottom: 0.5rem;
}

h1 {
    font-family: var(--font-sans);
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: #fff;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: #8b949e;
}

/* Terminal Box UI */
.terminal-box {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.terminal-header {
    background-color: #010409;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 8px;
}

.red { background-color: #ff5f56; }
.yellow { background-color: #ffbd2e; }
.green { background-color: #27c93f; }

.terminal-title {
    margin-left: 1rem;
    font-size: 0.9rem;
    color: #8b949e;
}

.terminal-body {
    padding: 1.5rem;
    font-size: 0.95rem;
}

.terminal-body p {
    margin-bottom: 0.8rem;
}

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

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
    text-decoration: none;
}

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

.btn-secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    text-decoration: none;
}

/* Writeups Page */
.page-header {
    margin-bottom: 3rem;
}

.page-header h1 {
    font-family: var(--font-mono);
    color: var(--accent-color);
}

.filter-section {
    margin-bottom: 2rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: var(--font-mono);
    transition: all 0.2s;
}

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

.writeups-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.writeup-card {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    transition: transform 0.2s, border-color 0.2s;
}

.writeup-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.badge {
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-weight: bold;
}

.badge.web { background-color: rgba(56, 189, 248, 0.1); color: #38bdf8; }
.badge.crypto { background-color: rgba(167, 139, 250, 0.1); color: #a78bfa; }
.badge.pwn { background-color: rgba(248, 113, 113, 0.1); color: #f87171; }

.badge-tag {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: bold;
    background-color: rgba(139, 148, 158, 0.1);
    color: #8b949e;
    margin-right: 0.3rem;
    margin-top: 0.5rem;
    border: 1px solid rgba(139, 148, 158, 0.2);
}

.writeup-card h2 {
    font-family: var(--font-sans);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.platform {
    font-size: 0.9rem;
    color: #8b949e;
    margin-bottom: 1rem;
}

.platform span {
    color: #fff;
}

.summary {
    margin-bottom: 1.5rem;
    color: #8b949e;
}

.read-more {
    font-weight: bold;
}

/* Privacy Page */
.privacy-text h3 {
    color: #fff;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.privacy-text p {
    color: #8b949e;
}

/* Kanban Board */
.kanban-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.kanban-column {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.kanban-column h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.col-todo h2 { border-color: #8b949e; color: #c9d1d9; }
.col-progress h2 { border-color: #ffbd2e; color: #ffbd2e; }
.col-done h2 { border-color: #3fb950; color: #3fb950; }

.kanban-card {
    background-color: #0d1117;
    border: 1px solid var(--border-color);
    border-left: 3px solid transparent;
    padding: 1rem;
    border-radius: 4px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.kanban-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.col-todo .kanban-card { border-left-color: #8b949e; }
.col-progress .kanban-card { border-left-color: #ffbd2e; }
.col-done .kanban-card { border-left-color: #3fb950; }

.kanban-card h3 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 0.3rem;
}

.kanban-card p {
    font-size: 0.85rem;
    color: #8b949e;
}

/* Footer */
footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.9rem;
    color: #8b949e;
}

/* Responsive */
@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    nav {
        flex-direction: column;
        gap: 1.2rem;
        text-align: center;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
    }
    .cta-buttons { flex-direction: column; }
    .btn { text-align: center; }
    .kanban-board { grid-template-columns: 1fr; }
}