:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #58a6ff;
    --secondary-bg: #161b22;
    --border-color: #30363d;
    --card-bg: #21262d;
    --gradient-start: #1f2428;
    --gradient-end: #24292e;
    --success-color: #238636;
    --warning-color: #d29922;
    --danger-color: #cf222e;
    --info-color: #2f81f7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background: linear-gradient(135deg, var(--secondary-bg), #0d1117);
    padding: 6rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    position: relative;
}

/* Nav */
.nav-bar {
    position: absolute;
    top: 1rem;
    right: 2rem;
    font-size: 1.1rem;
}

.nav-bar a {
    margin-left: 1.5rem;
    color: var(--text-color);
    font-weight: 600;
}

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

.nav-bar a.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
}


header h1 {
    margin: 0;
    color: var(--accent-color);
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.5rem;
    color: #8b949e;
    max-width: 600px;
    margin: 0 auto;
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

/* Grid Layout for Sections */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

section {
    padding: 2rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    border-color: var(--accent-color);
}

/* Full width section override */
section.full-width {
    grid-column: 1 / -1;
}

h2 {
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

.button-container {
    margin-top: 2rem;
    text-align: center;
}

.button {
    display: inline-block;
    background-color: var(--success-color);
    color: #ffffff;
    padding: 1rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    margin: 0 0.5rem;
    transition: background-color 0.2s;
    font-size: 1.1rem;
}

.button:hover {
    background-color: #2ea043;
    text-decoration: none;
}

.button-secondary {
    background-color: #30363d;
}

.button-secondary:hover {
    background-color: #3c444d;
}

footer {
    text-align: center;
    padding: 3rem;
    color: #8b949e;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    background-color: var(--secondary-bg);
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    margin-bottom: 0.8rem;
}

li a::before {
    content: "📁 ";
    margin-right: 0.5rem;
}

code {
    background-color: rgba(110, 118, 129, 0.2);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
    font-size: 0.9em;
    color: #f0f6fc;
}

/* Tools Page Styles */
.search-container {
    text-align: center;
    margin-bottom: 3rem;
}

.search-input {
    width: 100%;
    max-width: 600px;
    padding: 1rem;
    font-size: 1.2rem;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    outline: none;
}

.search-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}

.tool-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: border-color 0.2s;
}

.tool-card:hover {
    border-color: var(--accent-color);
}

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

.tool-title {
    font-size: 1.4rem;
    color: var(--accent-color);
    margin: 0;
}

.tool-category {
    font-size: 0.8rem;
    background-color: rgba(110, 118, 129, 0.3);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: #c9d1d9;
    text-transform: uppercase;
    font-weight: 600;
}

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

.tool-flags {
    background-color: #0d1117;
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    color: #e6edf3;
}

.tool-flags strong {
    color: var(--warning-color);
}

.hidden {
    display: none !important;
}

/* Category Colors */
.cat-net { background-color: rgba(56, 139, 253, 0.2); color: #58a6ff; }
.cat-web { background-color: rgba(210, 153, 34, 0.2); color: #d29922; }
.cat-exp { background-color: rgba(248, 81, 73, 0.2); color: #f85149; }
.cat-for { background-color: rgba(163, 113, 247, 0.2); color: #a371f7; }
.cat-osint { background-color: rgba(63, 185, 80, 0.2); color: #3fb950; }

/* CTF / Wiki Styles */
.module-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    border-color: var(--accent-color);
}

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

.module-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 2rem;
    text-transform: uppercase;
}

.badge-easy { background-color: rgba(63, 185, 80, 0.2); color: #3fb950; border: 1px solid rgba(63, 185, 80, 0.4); }
.badge-medium { background-color: rgba(210, 153, 34, 0.2); color: #d29922; border: 1px solid rgba(210, 153, 34, 0.4); }
.badge-hard { background-color: rgba(248, 81, 73, 0.2); color: #f85149; border: 1px solid rgba(248, 81, 73, 0.4); }

.module-desc {
    flex-grow: 1;
    font-size: 0.95rem;
    color: #8b949e;
    margin-bottom: 1.5rem;
}

.module-meta {
    font-size: 0.85rem;
    color: #8b949e;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.wiki-section-title {
    font-size: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin: 3rem 0 1.5rem 0;
}

.hero-search {
    margin-top: 2rem;
}

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

.search-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
    max-width: 600px;
}

.clear-button {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: #8b949e;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background-color 0.2s;
}

.clear-button:hover {
    color: var(--text-color);
    background-color: rgba(139, 148, 158, 0.2);
}

.no-results {
    text-align: center;
    padding: 3rem;
    color: #8b949e;
    grid-column: 1 / -1;
    font-size: 1.1rem;
}