/* Dark Tech & Code-Vibe Variables */
:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(17, 24, 39, 0.6);
    --card-bg-hover: rgba(30, 41, 59, 0.7);
    --border-color: rgba(148, 163, 184, 0.08);
    --border-color-hover: rgba(56, 189, 248, 0.3);
    
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    
    --primary: #38bdf8; /* Cyber blue */
    --primary-glow: rgba(56, 189, 248, 0.2);
    --secondary: #34d399; /* Terminal green */
    --secondary-glow: rgba(52, 211, 153, 0.2);
    
    --accent-coding: #38bdf8;
    --accent-activity: #fbbf24;
    --accent-arts: #a78bfa;
    --accent-academics: #34d399;
    
    --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #34d399 100%);
    
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.92rem;
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Toned Down Background Glows */
.glow-orb {
    position: absolute;
    width: 35vw;
    height: 35vw;
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.08;
    pointer-events: none;
    z-index: -1;
}

.orb-blue {
    top: 5%;
    left: 10%;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

.orb-emerald {
    bottom: 10%;
    right: 10%;
    background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
}

/* Glassmorphism Common Styles */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    background: var(--card-bg-hover);
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

/* Typography Elements */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
    font-size: 0.85rem;
    text-decoration: none;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #0b0f19;
    font-weight: 600;
    box-shadow: 0 2px 10px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color-hover);
    color: var(--text-primary);
}

.btn-block {
    width: 100%;
}

/* Header */
header {
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-icon {
    color: var(--primary);
    font-size: 1.1rem;
}

/* Main Container */
.main-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 24px 80px;
}

/* Terminal & Search Header */
.hub-header {
    margin-top: 10px;
    margin-bottom: 24px;
}

.terminal-header {
    background: #141b2e;
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.terminal-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.terminal-dot.red { background-color: #ef4444; }
.terminal-dot.yellow { background-color: #f59e0b; }
.terminal-dot.green { background-color: #10b981; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: 8px;
    letter-spacing: 0.5px;
}

.search-section {
    border-top-left-radius: 0 !important;
    border-top-right-radius: 0 !important;
    border-bottom-left-radius: 10px !important;
    border-bottom-right-radius: 10px !important;
    background: #0f172a;
    padding: 16px;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    background: #0b0f19;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.search-bar:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.search-icon {
    font-size: 0.9rem;
    color: var(--primary);
    margin-left: 14px;
}

.search-bar input {
    width: 100%;
    background: none;
    border: none;
    outline: none;
    padding: 12px 14px;
    color: var(--text-primary);
    font-size: 0.92rem;
    font-family: var(--font-mono);
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.search-clear-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 10px;
    cursor: pointer;
    display: none;
}

/* Category Tabs Selector (Top horizontal layout) */
.category-selector-section {
    margin-bottom: 24px;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tab-btn {
    background: #111827;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    font-size: 0.82rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: var(--transition-smooth);
    flex: 1 1 auto;
    justify-content: center;
}

.tab-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(56, 189, 248, 0.05);
    font-weight: 600;
}

/* Communities Content Area */
.communities-display-section {
    margin-bottom: 48px;
    min-height: 250px;
}

.category-display-header {
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.category-display-header h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-display-header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* Inline Grid of Communities */
.communities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.community-card {
    padding: 20px;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

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

.comm-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 8px;
}

.comm-header h3 {
    font-family: var(--font-heading);
    font-size: 0.98rem;
    font-weight: 650;
    color: var(--text-primary);
}

.comm-badge {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background: rgba(56, 189, 248, 0.08);
    color: var(--primary);
    border: 1px solid rgba(56, 189, 248, 0.15);
    padding: 2px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

.community-card p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-bottom: 16px;
    flex: 1;
}

.btn-join {
    background: #0088cc;
    color: #fff;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.8rem;
    padding: 8px 14px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.btn-join:hover {
    background: #009ce8;
    transform: translateY(-1px);
}

/* Sponsor/Ad Banner Placement at the Bottom */
.sponsor-banner-section {
    margin-top: 32px;
    margin-bottom: 16px;
}

.ad-banner {
    padding: 24px;
    background: #111827;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.ad-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    background: rgba(52, 211, 153, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(52, 211, 153, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
}

.ad-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.ad-text h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.ad-text p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    max-width: 650px;
    margin-bottom: 12px;
}

.ad-contact-info {
    display: flex;
    gap: 16px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
}

.ad-contact-info span {
    color: var(--text-secondary);
}

.ad-contact-info span i {
    color: var(--primary);
    margin-right: 4px;
}

.btn-ad {
    border-radius: 4px;
    font-size: 0.82rem;
    padding: 8px 16px;
}

/* Modals (For suggestion form only) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 7, 12, 0.85);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    padding: 16px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    width: 100%;
    max-width: 480px;
    border-radius: var(--radius-sm);
    padding: 24px;
    position: relative;
    background: #0f172a;
    border: 1px solid var(--border-color-hover);
    transform: translateY(15px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-header {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.modal-title-icon {
    font-size: 1.1rem;
    color: var(--primary);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 650;
}

.modal-header p {
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 0.72rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    background: #0b0f19;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary);
}

.form-group select option {
    background: #0b0f19;
    color: var(--text-primary);
}

.form-success-message {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: rgba(52, 211, 153, 0.08);
    border: 1px solid rgba(52, 211, 153, 0.2);
    border-radius: 4px;
    color: #34d399;
    font-size: 0.8rem;
    margin-top: 14px;
}

/* About Section Styling */
.about-section {
    padding: 24px;
    margin-bottom: 32px;
    background: var(--card-bg);
}

.about-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.about-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(56, 189, 248, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
}

.about-header h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
}

.about-subtitle {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--secondary);
    text-transform: uppercase;
}

.about-body p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Footer Styling */
footer {
    background: #070a12;
    border-top: 1px solid var(--border-color);
    padding: 32px 24px 20px;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto 24px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-top: 8px;
    max-width: 320px;
}

.footer-contact h4 {
    font-size: 0.82rem;
    font-family: var(--font-mono);
    color: var(--text-primary);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.contact-details {
    list-style: none;
}

.contact-details li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.contact-details li a {
    color: var(--text-secondary);
    text-decoration: none;
}

.contact-details li a:hover {
    color: var(--primary);
}

.contact-details li i {
    color: var(--primary);
    width: 14px;
}

.footer-bottom {
    max-width: 1100px;
    margin: 0 auto;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.02);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    flex-wrap: wrap;
    gap: 8px;
}

.developer {
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.dev-name {
    color: var(--secondary);
    font-weight: 600;
}

/* Responsiveness Settings */
@media (max-width: 768px) {
    .ad-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .btn-ad {
        width: 100%;
    }
    .footer-container {
        flex-direction: column;
        gap: 24px;
    }
}

@media (max-width: 600px) {
    .main-container {
        padding: 16px 12px 60px;
    }
    .hub-header {
        margin-bottom: 16px;
    }
    .search-section {
        padding: 10px;
    }
    .search-bar input {
        padding: 10px 8px;
        font-size: 0.85rem;
    }
    .category-tabs {
        gap: 6px;
    }
    .tab-btn {
        padding: 10px 8px;
        font-size: 0.76rem;
        flex: 1 1 calc(50% - 6px); /* Forces a 2-column layout grid for all 6 categories on mobile */
    }
    .communities-grid {
        grid-template-columns: 1fr; /* Single column on phones */
        gap: 12px;
    }
    .community-card {
        padding: 16px;
    }
    .ad-banner {
        padding: 16px;
    }
    .ad-text h3 {
        font-size: 1.05rem;
    }
    .ad-text p {
        font-size: 0.8rem;
    }
    .ad-contact-info {
        flex-direction: column;
        gap: 6px;
    }
    .logo {
        font-size: 1rem;
    }
    .header-container {
        padding: 10px 12px;
    }
}