/* ============================================
   CyberSec & SysOps Hub - Professional Stylesheet
   Created by: Mateusz Oliwier Tarara
   Course: Internet Technologies
   ============================================ */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #1fe6af;
    --secondary-color: #19456b;
    --dark-bg: #1a1a2e;
    --darker-bg: #0f0f1e;
    --light-text: #ffffff;
    --gray-text: #d1d5db;
    --card-bg: #252540;
    --hover-color: #1bd9a3;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* Light Theme Variables */
[data-theme="light"] {
    --primary-color: #0d7a66;
    --secondary-color: #e7f3ff;
    --dark-bg: #f7f9fc;
    --darker-bg: #eef3f9;
    --light-text: #0f172a;
    --gray-text: #334155;
    --card-bg: #ffffff;
    --hover-color: #0b6854;
    --box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--dark-bg);
    color: var(--light-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container - Reusable class for content width */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ============================================
   Header Styles
   ============================================ */
.main-header {
    background: linear-gradient(135deg, var(--secondary-color), var(--darker-bg));
    padding: 1.5rem 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--primary-color);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 1px;
}

/* Mobile Menu Toggle - Hamburger */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger {
    width: 28px;
    height: 3px;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-toggle.active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Main Navigation - Class for navigation menu */
.main-navigation ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-navigation a {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) ease;
    position: relative;
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-speed) ease;
}

.main-navigation a:hover::after,
.main-navigation a.active::after {
    width: 80%;
}

.main-navigation a:hover,
.main-navigation a.active {
    color: var(--primary-color);
    background-color: rgba(22, 199, 154, 0.1);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #475569;
    transition: var(--transition-speed);
    border-radius: 9999px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-speed);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* ============================================
   Main Content Sections
   ============================================ */
main {
    flex: 1;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-text {
    font-size: 1.3rem;
    color: var(--light-text);
    font-weight: 300;
}

/* Content Section */
.content-section {
    padding: 3rem 0;
}

/* Feature Card - Class for content cards */
.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(22, 199, 154, 0.3);
}

.feature-card h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.feature-card p {
    margin-bottom: 1rem;
    color: var(--gray-text);
}

.feature-card ul {
    margin-left: 2rem;
    color: var(--gray-text);
}

.feature-card ul li {
    margin-bottom: 0.5rem;
    position: relative;
}

.feature-card ul li::before {
    content: '▹';
    color: var(--primary-color);
    position: absolute;
    left: -1.5rem;
    font-weight: bold;
}

/* Info Box - Class for information boxes */
.info-box {
    background: linear-gradient(135deg, var(--card-bg), var(--secondary-color));
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    margin-top: 2rem;
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-box a {
    color: var(--primary-color);
    text-decoration: underline;
    transition: color var(--transition-speed) ease;
}

.info-box a:hover {
    color: var(--hover-color);
}

.info-box code {
    background-color: var(--darker-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
}

/* Highlights Section */
.highlights-section {
    background-color: var(--darker-bg);
    padding: 3rem 0;
    margin-top: 2rem;
}

.highlights-section h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease;
}

.stat-card:hover {
    transform: scale(1.05);
}

.stat-card h4 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* ============================================
   Gallery Page Styles
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--secondary-color), var(--darker-bg));
    padding: 3rem 0;
    text-align: center;
    border-bottom: 3px solid var(--primary-color);
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--gray-text);
}

.gallery-section {
    padding: 3rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.gallery-item {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 20px rgba(22, 199, 154, 0.4);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-speed) ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-caption {
    padding: 1.5rem;
}

.gallery-caption h4 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.gallery-caption p {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    overflow: auto;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(22, 199, 154, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: var(--primary-color);
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-speed) ease;
    z-index: 10000;
}

.lightbox-close:hover {
    color: var(--light-text);
}

.lightbox-caption {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--light-text);
    text-align: center;
    background-color: rgba(26, 26, 46, 0.9);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
}

/* ============================================
   Links/Resources Page Styles
   ============================================ */
.links-section {
    padding: 3rem 0;
}

.links-category {
    margin-bottom: 3rem;
}

.links-category h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.links-list {
    display: grid;
    gap: 1.5rem;
}

.link-item {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-speed) ease;
}

.link-item:hover {
    transform: translateX(10px);
    box-shadow: 0 6px 12px rgba(22, 199, 154, 0.4);
}

.link-item h4 {
    margin-bottom: 0.5rem;
}

.link-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 600;
    transition: color var(--transition-speed) ease;
}

.link-item a:hover {
    color: var(--hover-color);
    text-decoration: underline;
}

.link-item p {
    color: var(--gray-text);
    line-height: 1.6;
}

/* ============================================
   Footer Styles
   ============================================ */
.main-footer {
    background-color: var(--darker-bg);
    padding: 2rem 0;
    text-align: center;
    border-top: 3px solid var(--primary-color);
    margin-top: 3rem;
}

.main-footer p {
    color: var(--gray-text);
    margin-bottom: 0.5rem;
}

/* Footer Subscribe Form */
.subscribe-form {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
}

.subscribe-form input[type="email"] {
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    border: 1px solid #334155;
    background-color: var(--card-bg);
    color: var(--light-text);
}

.subscribe-form button[type="submit"] {
    padding: 0.5rem 0.9rem;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    background-color: #0a5a4d;
    color: #ffffff;
    font-weight: 600;
    transition: filter var(--transition-speed) ease;
}

.subscribe-form button[type="submit"]:hover {
    filter: brightness(1.05);
}

.form-message {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.95rem;
    color: var(--gray-text);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #0f172a;
    color: #ffffff;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 100;
    font-weight: 600;
    border: 2px solid #ffffff;
}

.skip-link:focus {
    top: 0;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .main-header .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        flex-wrap: nowrap;
        position: relative;
    }
    
    .mobile-menu-toggle {
        display: flex;
        order: 2;
    }
    
    .logo {
        order: 1;
    }
    
    .theme-toggle {
        order: 3;
    }
    
    .main-navigation {
        order: 4;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--darker-bg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        border-top: 2px solid var(--primary-color);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    }
    
    .main-navigation.active {
        max-height: 400px;
        padding: 1rem 0;
    }
    
    .main-navigation ul {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .main-navigation li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid rgba(31, 230, 175, 0.1);
    }
    
    .main-navigation li:last-child {
        border-bottom: none;
    }
    
    .main-navigation a {
        display: block;
        padding: 1rem;
        width: 100%;
    }
    
    .hero-section h2 {
        font-size: 2rem;
    }
    
    .hero-text {
        font-size: 1.1rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .lightbox-content {
        max-width: 95%;
        max-height: 70%;
    }
    
    .lightbox-close {
        top: 10px;
        right: 20px;
        font-size: 40px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .feature-card,
    .info-box,
    .link-item {
        padding: 1rem;
    }
    
    .page-header h2 {
        font-size: 1.8rem;
    }
}

/* ============================================
   Accessibility Improvements
   ============================================ */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 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;
    }
}

/* Print Styles */
@media print {
    .main-header,
    .main-footer,
    .main-navigation {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .feature-card,
    .link-item {
        page-break-inside: avoid;
    }
}