/* ===========================
   CSS Variables & Reset
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-bg: #0a0a0a;
    --secondary-bg: #141414;
    --card-bg: #1a1a1a;
    --accent-primary: #d4af37;
    --accent-secondary: #8b7355;
    --text-primary: #f5f5f5;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --border-color: #2a2a2a;
    --menu-bg: #f8f9fa;
    --menu-hover: #e9ecef;
    --menu-active: #007bff;
    --menu-text: #495057;
    --menu-border: #dee2e6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Mount icon hover effect */
.mount-icon-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.mount-icon-hover:hover {
    transform: scale(4);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.6);
    z-index: 1000;
    position: relative;
}

/* ===========================
   Header Styles
   =========================== */
.header {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.header-container {
    max-width: 1920px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.back-home-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(212, 175, 55, 0.2);
    border: 1px solid rgba(212, 175, 55, 0.5);
    border-radius: 8px;
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.back-home-btn:hover {
    background: rgba(212, 175, 55, 0.3);
    transform: translateY(-2px);
}

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.social-btn {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.discord-btn {
    background: rgba(88, 101, 242, 0.2);
}

.discord-btn:hover {
    background: rgba(88, 101, 242, 0.3);
    transform: scale(1.1);
}

.register-btn {
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #000;
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.4);
}

/* ===========================
   Main Container
   =========================== */
.main-container {
    display: flex;
    flex: 1;
    max-width: 1920px;
    margin: 0 auto;
    width: 100%;
}

/* ===========================
   Side Menu Styles
   =========================== */
.side-menu {
    width: 280px;
    background: #0a0a0a;
    border-right: 1px solid var(--border-color);
    padding: 0.5rem 0 1.5rem 0;
    overflow-y: auto;
    position: sticky;
    top: 73px;
    height: calc(100vh - 73px);
}

.menu-header {
    padding: 1rem;
    text-align: center;
    margin-bottom: 1rem;
}

.menu-logo {
    display: block;
    text-decoration: none;
}

.menu-logo img {
    width: 100%;
    max-width: 180px;
    height: auto;
    transition: all var(--transition-normal);
}

.menu-logo:hover img {
    transform: scale(1.05);
}

.side-menu::-webkit-scrollbar {
    width: 6px;
}

.side-menu::-webkit-scrollbar-track {
    background: transparent;
}

.side-menu::-webkit-scrollbar-thumb {
    background: var(--menu-border);
    border-radius: 3px;
}

.menu-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.menu-section {
    margin-bottom: 0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
    margin: 0;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    font-size: 0.85rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    border: 2px solid var(--border-color);
    background: rgba(10, 10, 10, 0.5);
}

.menu-icon {
    font-size: 1.25rem;
    min-width: 24px;
}

.menu-item:hover {
    background: var(--card-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.menu-item.active {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15), rgba(212, 175, 55, 0.05));
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    font-weight: 600;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

.menu-item.expandable {
    position: relative;
}

.menu-item.expanded .arrow-icon {
    transform: rotate(90deg);
}

.menu-text {
    flex: 1;
}

.arrow-icon {
    transition: transform var(--transition-normal);
    color: var(--accent-primary);
}

/* Submenu Styles */
.menu-item-with-submenu { 
    position: relative; 
}

.submenu-arrow { 
    margin-left: auto; 
    font-size: 0.8rem; 
    transition: transform 0.3s ease; 
    color: var(--accent-primary); 
}

.menu-item.active .submenu-arrow { 
    transform: rotate(180deg); 
}

.submenu { 
    max-height: 0; 
    overflow: hidden; 
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
    background: rgba(0, 0, 0, 0.3); 
    border-left: 3px solid var(--accent-primary); 
    margin-left: 1rem; 
}

.submenu.expanded { 
    max-height: 600px; 
}

.submenu-item { 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
    padding: 0.75rem 1rem; 
    color: #FFFFFF; 
    text-decoration: none; 
    transition: all 0.3s ease; 
    font-size: 0.85rem; 
    border-left: 3px solid transparent; 
    position: relative; 
    overflow: visible; 
    line-height: 1.3; 
}

.submenu-item::before { 
    content: ''; 
    position: absolute; 
    left: 0; 
    top: 0; 
    height: 100%; 
    width: 0; 
    background: linear-gradient(90deg, rgba(212,175,55,0.2), transparent); 
    transition: width 0.3s ease; 
}

.submenu-item:hover::before { 
    width: 100%; 
}

.submenu-item:hover { 
    background: rgba(212, 175, 55, 0.1); 
    border-left-color: var(--accent-primary); 
    transform: translateX(5px); 
    color: var(--accent-primary); 
}

.submenu-icon { 
    font-size: 1.1rem; 
    filter: drop-shadow(0 0 5px rgba(212, 175, 55, 0.5)); 
    flex-shrink: 0; 
}

.submenu-item:hover .submenu-icon { 
    transform: scale(1.2); 
    transition: transform 0.3s ease; 
}

.submenu-item.active { 
    background: rgba(212, 175, 55, 0.2); 
    border-left-color: var(--accent-primary); 
    color: var(--accent-primary); 
    font-weight: 600; 
}

.submenu-item span:not(.submenu-icon) { 
    word-wrap: break-word; 
    white-space: normal; 
}

/* Nested submenu styles for level 2 */
.submenu-item-with-submenu {
    position: relative;
}

.submenu-level-2 {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(0, 0, 0, 0.5);
    border-left: 2px solid rgba(212, 175, 55, 0.5);
    margin-left: 1.5rem;
}

.submenu-level-2.expanded {
    max-height: 400px;
}

.submenu-item-level-2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.8rem;
    color: #FFFFFF;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.8rem;
    border-left: 2px solid transparent;
    position: relative;
}

.submenu-item-level-2:hover {
    background: rgba(212, 175, 55, 0.08);
    border-left-color: var(--accent-primary);
    transform: translateX(3px);
    color: var(--accent-primary);
}

.submenu-item-level-2 .submenu-icon {
    font-size: 0.9rem;
}

/* ===========================
   Main Content Styles
   =========================== */
.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    background: var(--primary-bg);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.content-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.content-card h2 {
    color: var(--accent-primary);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.content-card h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-card ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1rem;
}

.content-card ul li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.content-card ul li::before {
    content: "▸";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.info-box {
    background: rgba(212, 175, 55, 0.1);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.info-box strong {
    color: var(--accent-primary);
}

/* ===========================
   Footer Styles
   =========================== */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .side-menu {
        width: 240px;
    }
    
    .main-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-title {
        font-size: 1.25rem;
    }
    
    .main-container {
        flex-direction: column;
    }
    
    .side-menu {
        width: 100%;
        position: relative;
        top: 0;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--menu-border);
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}