/* features.css - Features Page Stylesheet */

/* Layout */
.features-page-layout {
    display: flex;
    max-width: 1200px;
    margin: 80px auto 0 auto; /* space for fixed header */
    padding: 40px 24px;
    gap: 40px;
    position: relative;
}

/* Sidebar Navigation */
.features-sidebar {
    width: 260px;
    flex-shrink: 0;
}

.sidebar-inner {
    position: sticky;
    top: 120px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    padding-right: 12px;
}

/* Custom scrollbar for sidebar */
.sidebar-inner::-webkit-scrollbar {
    width: 4px;
}
.sidebar-inner::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar-inner::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
.sidebar-inner::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar-heading {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-left: 3px solid var(--accent-green);
    padding-left: 12px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: 8px;
    transition: var(--transition-smooth);
    border-left: 2px solid transparent;
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--accent-cyan);
    padding-left: 20px;
}

.sidebar-link.active {
    background: rgba(var(--accent-green-rgb), 0.05);
    border-left-color: var(--accent-green);
    color: var(--accent-green);
    font-weight: 600;
}

/* Main Content */
.features-main-content {
    flex-grow: 1;
    min-width: 0; /* prevent layout break */
}

.features-page-hero {
    margin-bottom: 60px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 40px;
}

.features-page-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    line-height: 1.2;
}

.features-page-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
}

/* Feature Sections */
.feature-section {
    padding: 60px 0;
    border-bottom: 1px solid var(--glass-border);
    scroll-margin-top: 100px; /* offset for fixed header */
}

.feature-section:last-of-type {
    border-bottom: none;
}

.feature-section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 850px;
}

/* Supported Databases Grid */
.db-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.db-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: var(--transition-smooth);
}

.db-card:hover {
    border-color: var(--glass-border-hover);
    background: var(--glass-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-premium);
}

.db-card img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.db-icon-placeholder {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
}

.db-card-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.db-port {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.feature-callout {
    background: rgba(var(--accent-cyan-rgb), 0.05);
    border-left: 3px solid var(--accent-cyan);
    border-radius: 0 12px 12px 0;
    padding: 16px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 24px;
}

/* Feature 2 Column Grid */
.feature-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.feature-detail-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.feature-detail-card:hover {
    border-color: var(--glass-border-hover);
    background: var(--glass-bg-hover);
}

.feature-detail-card.full-width {
    grid-column: 1 / -1;
}

.feature-detail-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    order: -2;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-list li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.feature-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-size: 1.2rem;
    line-height: 1.1;
    top: 0px;
}

.feature-list.horizontal {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 10px;
}

.feature-list.horizontal li {
    flex: none;
    width: 100%;
}

.feature-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

/* Screenshot placeholders styled like mockup window */
.screenshot-placeholder {
    background: linear-gradient(135deg, hsl(222, 47%, 9%) 0%, hsl(222, 47%, 5%) 100%);
    border: 2px dashed rgba(var(--accent-cyan-rgb), 0.25);
    border-radius: 12px;
    padding: 32px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
    min-height: 280px;
    transition: var(--transition-smooth);
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
    order: -1;
    width: 100%;
}

.screenshot-placeholder:hover {
    border-color: rgba(var(--accent-cyan-rgb), 0.5);
    background: linear-gradient(135deg, hsl(222, 47%, 12%) 0%, hsl(222, 47%, 7%) 100%);
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.7), 0 8px 24px rgba(var(--accent-cyan-rgb), 0.15);
}

.screenshot-placeholder::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 16px;
    width: 32px;
    height: 8px;
    background: radial-gradient(circle at 4px center, #ef5350 4px, transparent 4px),
                radial-gradient(circle at 16px center, #ffca28 4px, transparent 4px),
                radial-gradient(circle at 28px center, #66bb6a 4px, transparent 4px);
    opacity: 0.6;
}

.screenshot-placeholder::after {
    content: attr(data-label);
    position: absolute;
    top: 8px;
    right: 16px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.placeholder-text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-cyan);
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* Feature Matrix Table */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 16px;
}

.feature-matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.feature-matrix-table th, .feature-matrix-table td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid var(--glass-border);
}

.feature-matrix-table th {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    font-weight: 600;
}

.feature-matrix-table td:first-child, .feature-matrix-table th:first-child {
    text-align: left;
    font-weight: 500;
}

.feature-matrix-table td {
    color: var(--text-secondary);
}

.feature-matrix-table tr:hover {
    background: rgba(255, 255, 255, 0.01);
}

/* Context Menu Action Groups */
.context-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.context-group {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
}

.context-group h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--glass-border);
}

.context-group ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.context-group li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 16px;
}

.context-group li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-cyan);
}

/* Visual Query Builder timeline style */
.vqb-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.vqb-step {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    position: relative;
}

.vqb-step-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: rgba(var(--accent-green-rgb), 0.15);
    line-height: 1;
}

.vqb-step h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.vqb-step p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Platform Showcase Grid */
.platform-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.platform-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    transition: var(--transition-smooth);
}

.platform-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(var(--accent-cyan-rgb), 0.15);
}

.platform-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.platform-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.platform-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* CTA */
.features-cta {
    background: linear-gradient(135deg, rgba(var(--accent-green-rgb), 0.08) 0%, rgba(var(--accent-cyan-rgb), 0.08) 100%);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    margin: 80px 0 40px 0;
}

.features-cta h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.features-cta p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Tunnel Diagram styling in Features page */
.tunnel-architecture-diagram {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 10px;
}

.arch-node {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}

.arch-client {
    background: rgba(var(--accent-green-rgb), 0.15);
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
}

.arch-proxy {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.arch-db {
    background: rgba(var(--accent-cyan-rgb), 0.15);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
}

.arch-arrow {
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Responsive design */
@media (max-width: 992px) {
    .features-page-layout {
        flex-direction: column;
        margin-top: 80px; /* space for fixed header */
        padding: 20px 16px;
    }
    
    .features-sidebar {
        width: 100%;
        margin-left: 0;
        margin-right: 0;
        flex-shrink: 1;
        position: sticky;
        top: 80px; /* right below the 80px fixed header */
        z-index: 99;
        background: rgba(11, 15, 25, 0.9);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--glass-border);
        padding: 8px 0;
        margin-bottom: 24px;
    }
    
    .sidebar-inner {
        position: static;
        max-height: none;
        overflow-y: visible;
        padding-right: 0;
        width: 100%;
    }
    
    .sidebar-heading {
        display: none; /* hide overview header text to make sticky menu compact */
    }
    
    .sidebar-nav {
        display: flex;
        width: 100%;
        max-width: 100%;
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 4px;
        scroll-snap-type: x mandatory;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE and Edge */
    }
    
    .sidebar-nav::-webkit-scrollbar {
        display: none; /* Chrome, Safari, Opera */
    }
    
    .sidebar-link {
        white-space: nowrap;
        scroll-snap-align: start;
        border-left: none;
        border-bottom: 2px solid transparent;
        padding: 8px 12px;
    }
    
    .sidebar-link.active {
        border-left-color: transparent;
        border-bottom-color: var(--accent-green);
    }
    
    .feature-section {
        scroll-margin-top: 140px; /* offset for fixed header + sticky tab menu */
    }
    
    .features-page-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .feature-grid-2col {
        grid-template-columns: 1fr;
    }
    
    .db-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    
    .features-cta {
        padding: 40px 20px;
    }
    
    .features-cta h2 {
        font-size: 1.8rem;
    }
}

/* Section Navigation Footer */
.section-nav-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
    gap: 16px;
}

.section-nav-btn {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    padding: 14px 20px;
    border-radius: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
    flex: 1;
    max-width: 48%;
}

.section-nav-btn.prev-btn {
    align-items: flex-start;
}

.section-nav-btn.next-btn {
    align-items: flex-end;
    text-align: right;
    margin-left: auto;
}

.section-nav-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.section-nav-btn .nav-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    opacity: 0.6;
    margin-bottom: 4px;
}

.section-nav-btn .nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.section-nav-btn:hover .nav-title {
    color: var(--accent-cyan);
}

@media (max-width: 576px) {
    .section-nav-footer {
        flex-direction: column;
        align-items: stretch;
    }
    
    .section-nav-btn {
        max-width: 100%;
        width: 100%;
    }
    
    .section-nav-btn.next-btn {
        margin-left: 0;
        align-items: flex-start;
        text-align: left;
    }
    
    .tunnel-architecture-diagram {
        flex-direction: column;
        gap: 8px;
    }
    
    .tunnel-architecture-diagram .arch-arrow {
        transform: rotate(90deg);
    }
}