:root {
    /* Default Dark Theme */
    --bg-body: #1f2937;
    --text-main: #f3f4f6;
    --bg-header: #111827;
    --text-muted: #9ca3af;
    --bg-card: #111827;
    --border-card: rgba(255, 255, 255, 0.1);
    --accent-color: #3b82f6;
    --bg-input: #374151;
    --border-input: #4b5563;
    --text-input: #fff;
    --bg-button: #3b82f6;
    --bg-button-hover: #2563eb;
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --code-bg: #111827;
    --code-text: #e5e7eb;
    --cmd-bg: #374151;
    --cmd-text: #60a5fa;
}

[data-theme="egypt"] {
    /* Ancient Egypt Light Theme */
    --bg-body: #F5E6C8;
    /* Sand */
    --text-main: #2C1810;
    /* Dark Brown */
    --bg-header: #1F1A17;
    /* Darker Brown */
    --text-muted: #5D4037;
    /* Earth */
    --bg-card: #FFF8E7;
    /* Light Papyrus */
    --border-card: #D4AF37;
    /* Gold */
    --accent-color: #26619C;
    /* Lapis Lazuli */
    --bg-input: #FFFFFF;
    --border-input: #D4AF37;
    --text-input: #2C1810;
    --bg-button: #26619C;
    --bg-button-hover: #1A4D80;
    --shadow-card: 0 4px 12px rgba(44, 24, 16, 0.1);
    --code-bg: #2C1810;
    --code-text: #D4AF37;
    --cmd-bg: #EAD8B1;
    --cmd-text: #26619C;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

main {
    width: 100%;
    margin-bottom: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--bg-header);
    padding: 20px 0;
    font-size: 14px;
    width: 100%;
    transition: background-color 0.3s;
    position: relative;
    height: 90px;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
}

.logo img {
    height: 50px;
    width: auto;
}

/* Navigation */
nav {
    display: block;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
}

nav ul li {
    margin-left: 0;
}

nav ul li a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    display: block;
    padding: 0px 5px;
}

nav ul li a:hover {
    color: var(--text-main);
}

[data-theme="egypt"] nav ul li a:hover {
    color: #ffffff;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    transition: color 0.3s;
}

.theme-toggle:hover {
    color: #fff;
}

[data-theme="egypt"] .theme-toggle:hover {
    color: var(--border-card);
}

/* Light theme - improve theme toggle visibility */
[data-theme="egypt"] .theme-toggle {
    color: #D4AF37;
    /* Gold for better visibility */
}

[data-theme="egypt"] .theme-toggle:hover {
    color: #FFD700;
    /* Brighter gold on hover */
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none !important;
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block !important;
        margin-left: 10px;
    }

    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-header);
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        display: none;
        z-index: 1000;
    }

    nav.show {
        display: block;
    }

    nav ul {
        flex-direction: column;
        align-items: flex-start;
    }

    nav ul li {
        margin: 0 0 15px 0;
        width: 100%;
    }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 40px 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 20px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--bg-button);
    color: #fff;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--bg-button-hover);
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    padding: 30px;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    position: relative;
    overflow: hidden;
}

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

[data-theme="egypt"] .card:hover {
    border-color: var(--border-card);
    /* Gold border on hover for Egypt */
}

.card-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-main);
}

.card p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.card-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Footer */
footer {
    background-color: var(--bg-header);
    color: var(--text-muted);
    padding: 10px 0;
    text-align: center;
    margin-top: auto;
    font-size: 0.75rem;
    border-top: 0.5px solid rgba(255, 255, 255, 0.05);
    min-height: 40px;
}

.footer-content {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.footer-content p {
    margin: 0;
}

.coffee {
    color: #ef4444;
}

/* Light theme - improve footer text visibility */
[data-theme="egypt"] .footer-content {
    color: #D4AF37;
    /* Gold for better visibility on dark footer */
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    color: var(--text-input);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

[data-theme="egypt"] .form-control:focus {
    border-color: var(--border-card);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin-top: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-card);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
}

th,
td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-card);
}

th {
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

[data-theme="egypt"] th {
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--text-main);
}

td {
    color: var(--text-main);
}

tr:last-child td {
    border-bottom: none;
}

/* Code Blocks & Terminal */
.cmd-block {
    background-color: var(--cmd-bg);
    color: var(--cmd-text);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}

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

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 20px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    border-radius: 12px;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.back-link:hover {
    color: #3b82f6; /* Blue text on hover */
    background: rgba(59, 130, 246, 0.1); /* Blue tint background */
    border-color: rgba(59, 130, 246, 0.3); /* Blue border */
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

[data-theme="egypt"] .back-link {
    background: rgba(255, 248, 231, 0.5);
    color: var(--text-main);
}

[data-theme="egypt"] .back-link:hover {
    color: var(--text-main);
    background: var(--bg-card);
    border-color: var(--border-card);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.back-link i {
    margin-right: 8px;
    transition: transform 0.3s ease;
}

.back-link:hover i {
    transform: translateX(-4px);
}

/* Subtitle */
.subtitle {
    color: var(--text-muted);
    margin-bottom: 20px;
    text-align: center;
}

/* Specific Page Styles */
.main-content h1 {
    color: var(--text-main);
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 20px;
    }

    .hero h1 {
        font-size: 2rem;
    }
}

/* Masonry Grid for Cheat Sheets */
.masonry-grid {
    column-count: 3;
    column-gap: 20px;
    padding: 20px 0;
}

.masonry-grid .card {
    break-inside: avoid;
    margin-bottom: 20px;
    display: inline-block;
    /* Fixes some rendering issues */
    width: 100%;
}

@media (max-width: 1024px) {
    .masonry-grid {
        column-count: 2;
    }
}

@media (max-width: 768px) {
    .masonry-grid {
        column-count: 1;
    }
}

/* Enforce Open Sans for Header/Footer */
header,
footer,
nav {
    font-family: 'Open Sans', sans-serif;
}

/* Enforce Yellow Links for Header/Footer in Light Mode (Egypt) */
[data-theme="egypt"] header a,
[data-theme="egypt"] footer a,
[data-theme="egypt"] nav a {
    color: #D4AF37 !important;
}

[data-theme="egypt"] header a:hover,
[data-theme="egypt"] footer a:hover,
[data-theme="egypt"] nav a:hover {
    color: #ffffff !important;
}

/* Active Menu Highlight */
nav ul li a.active {
    color: #ffffff !important;
    font-weight: bold;
}

/* Footer Tech Links */
footer p a,
[data-theme="egypt"] footer p a {
    color: #ffffff !important;
}