/* ========================================================== */
/* 100docs Modern Knowledge Base & Documentation Stylesheet  */
/* Optimized for Ultra-Fast Loading & Mobile Responsiveness  */
/* ========================================================== */

:root {
    --doc-primary: #2563eb;
    --doc-primary-hover: #1d4ed8;
    --doc-primary-soft: #eff6ff;
    --doc-primary-border: #bfdbfe;
    --doc-success: #10b981;
    --doc-warning: #f59e0b;
    --doc-danger: #ef4444;
    --doc-dark: #0f172a;
    --doc-text-main: #1e293b;
    --doc-text-muted: #64748b;
    --doc-bg-body: #f8fafc;
    --doc-bg-card: #ffffff;
    --doc-border: #e2e8f0;
    --doc-border-light: #f1f5f9;
    --doc-radius: 14px;
    --doc-radius-lg: 18px;
    --doc-shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --doc-shadow: 0 4px 20px rgba(0,0,0,0.04);
    --doc-shadow-hover: 0 10px 25px rgba(0,0,0,0.07);
}

body {
    background-color: var(--doc-bg-body);
    color: var(--doc-text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Reading Progress Bar */
#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, #10b981, #f59e0b);
    width: 0%;
    z-index: 9999;
    transition: width 0.1s linear;
}

/* Header Navbar */
.doc-navbar {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--doc-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1030;
}
.doc-brand {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--doc-dark);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    letter-spacing: -0.5px;
}
.doc-brand:hover {
    color: var(--doc-primary);
}
.doc-brand-badge {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    font-size: 0.68rem;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 800;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Hero Section */
.doc-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #ffffff;
    padding: 40px 0 35px 0;
    border-radius: 0 0 24px 24px;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}
.doc-search-box {
    position: relative;
    max-width: 650px;
    margin: 0 auto;
}
.doc-search-box input {
    background: #ffffff;
    border: 2px solid transparent;
    padding: 13px 20px 13px 48px;
    font-size: 0.95rem;
    border-radius: 50px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
    transition: all 0.25s ease;
    width: 100%;
}
.doc-search-box input:focus {
    outline: none;
    border-color: var(--doc-primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}
.doc-search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    font-size: 1.15rem;
    pointer-events: none;
}

/* Sidebar Navigation */
.doc-sidebar {
    background: var(--doc-bg-card);
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius);
    padding: 18px;
    position: sticky;
    top: 75px;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    box-shadow: var(--doc-shadow-sm);
}
.doc-sidebar::-webkit-scrollbar {
    width: 5px;
}
.doc-sidebar::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}
.doc-cat-title {
    font-size: 0.76rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
}
.doc-nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: 8px;
    color: #475569;
    text-decoration: none;
    font-size: 0.86rem;
    font-weight: 500;
    margin-bottom: 3px;
    transition: all 0.15s ease;
}
.doc-nav-item:hover {
    background-color: #f1f5f9;
    color: var(--doc-primary);
}
.doc-nav-item.active {
    background-color: var(--doc-primary-soft);
    color: var(--doc-primary);
    font-weight: 700;
    border-left: 3px solid var(--doc-primary);
    padding-left: 9px;
}

/* Article Reading Canvas */
.doc-article-card {
    background: var(--doc-bg-card);
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius-lg);
    padding: 35px 32px;
    box-shadow: var(--doc-shadow);
    margin-bottom: 25px;
}
.doc-article-header {
    border-bottom: 1px solid var(--doc-border-light);
    padding-bottom: 18px;
    margin-bottom: 25px;
}
.doc-article-title {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--doc-dark);
    line-height: 1.35;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}
.doc-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--doc-text-muted);
}
.doc-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* Typography Inside Article Body */
.doc-body {
    font-size: 1rem;
    color: #334155;
    line-height: 1.8;
}
.doc-body h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--doc-dark);
    margin-top: 35px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--doc-border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}
.doc-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #1e293b;
    margin-top: 25px;
    margin-bottom: 12px;
}
.doc-body p {
    margin-bottom: 16px;
}
.doc-body ul, .doc-body ol {
    margin-bottom: 20px;
    padding-left: 22px;
}
.doc-body li {
    margin-bottom: 8px;
}

/* Table Responsive Autowrap */
.doc-body table {
    width: 100%;
    margin-bottom: 24px;
    border-collapse: collapse;
    background: #ffffff;
    border: 1px solid var(--doc-border);
    border-radius: 10px;
    display: table;
}
.doc-body table th, .doc-body table td {
    padding: 12px 14px;
    border: 1px solid var(--doc-border);
    font-size: 0.9rem;
}
.doc-body table th {
    background-color: #f8fafc;
    font-weight: 700;
    color: var(--doc-dark);
}

/* Callout & Quotes */
.doc-callout {
    padding: 18px 20px;
    border-radius: 12px;
    margin: 22px 0;
    border-left: 4px solid;
}
.doc-callout-info {
    background-color: #eff6ff;
    border-color: #3b82f6;
    color: #1e40af;
}
.doc-callout-success {
    background-color: #f0fdf4;
    border-color: #22c55e;
    color: #166534;
}
.doc-callout-warning {
    background-color: #fffbeb;
    border-color: #f59e0b;
    color: #92400e;
}
.doc-callout-danger {
    background-color: #fef2f2;
    border-color: #ef4444;
    color: #991b1b;
}
.doc-quote {
    background-color: #f8fafc;
    border-left: 4px solid #94a3b8;
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    font-style: italic;
    margin: 22px 0;
    color: #475569;
}

/* Table of Contents Card (Desktop) */
.doc-toc-card {
    background: var(--doc-bg-card);
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius);
    padding: 18px;
    position: sticky;
    top: 75px;
    box-shadow: var(--doc-shadow-sm);
}
.doc-toc-title {
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--doc-dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.doc-toc-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}
.doc-toc-list li {
    margin-bottom: 6px;
}
.doc-toc-link {
    color: var(--doc-text-muted);
    text-decoration: none;
    font-size: 0.84rem;
    display: block;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.15s ease;
    line-height: 1.4;
}
.doc-toc-link:hover {
    color: var(--doc-primary);
    background-color: #f1f5f9;
}
.doc-toc-link.active {
    color: var(--doc-primary);
    background-color: var(--doc-primary-soft);
    font-weight: 700;
}
.doc-toc-link.sub {
    padding-left: 18px;
    font-size: 0.8rem;
}

/* Cards & Grids */
.doc-cat-card {
    background: var(--doc-bg-card);
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius);
    padding: 20px;
    transition: all 0.2s ease;
    height: 100%;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.doc-cat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--doc-shadow-hover);
    border-color: #cbd5e1;
    color: inherit;
}
.doc-cat-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 12px;
}
.doc-item-card {
    background: var(--doc-bg-card);
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius);
    padding: 18px;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}
.doc-item-card:hover {
    transform: translateY(-2px);
    border-color: #93c5fd;
    box-shadow: var(--doc-shadow-hover);
    color: inherit;
}

/* FAQ Accordion Styling */
.doc-accordion .accordion-item {
    border: 1px solid var(--doc-border);
    border-radius: var(--doc-radius) !important;
    margin-bottom: 10px;
    overflow: hidden;
}
.doc-accordion .accordion-button {
    font-weight: 700;
    color: #1e293b;
    background-color: #ffffff;
    box-shadow: none;
    font-size: 0.95rem;
    padding: 14px 18px;
}
.doc-accordion .accordion-button:not(.collapsed) {
    background-color: var(--doc-primary-soft);
    color: var(--doc-primary-hover);
}

/* Mobile Sticky Bottom Bar */
.doc-mobile-bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--doc-border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1025;
    padding: 0 10px;
    box-shadow: 0 -4px 15px rgba(0,0,0,0.04);
}
.doc-mobile-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #64748b;
    text-decoration: none;
    font-size: 0.68rem;
    font-weight: 700;
    background: none;
    border: none;
    padding: 4px 8px;
    cursor: pointer;
    transition: all 0.15s ease;
}
.doc-mobile-btn i {
    font-size: 1.2rem;
    margin-bottom: 2px;
}
.doc-mobile-btn:hover, .doc-mobile-btn.active {
    color: var(--doc-primary);
}

/* ========================================================== */
/* ULTRA-RESPONSIVE ADAPTATIONS (< 992px & < 576px)          */
/* ========================================================== */
@media (max-width: 991.98px) {
    body {
        padding-bottom: 70px !important; /* Space for Mobile Bottom Bar */
    }
    
    .doc-hero {
        padding: 30px 15px 25px 15px;
        border-radius: 0 0 18px 18px;
        margin-bottom: 20px;
    }
    .doc-hero h1 {
        font-size: 1.45rem !important;
    }
    .doc-hero p.lead {
        font-size: 0.88rem !important;
        margin-bottom: 18px !important;
    }
    .doc-search-box input {
        padding: 11px 16px 11px 42px;
        font-size: 0.88rem;
    }
    
    .doc-article-card {
        padding: 20px 16px;
        border-radius: var(--doc-radius);
    }
    .doc-article-title {
        font-size: 1.35rem;
        line-height: 1.35;
        margin-bottom: 12px;
    }
    .doc-body h2 {
        font-size: 1.18rem;
        margin-top: 26px;
    }
    .doc-body h3 {
        font-size: 1.05rem;
        margin-top: 20px;
    }
    .doc-body p, .doc-body li {
        font-size: 0.94rem;
        line-height: 1.7;
    }
    
    /* Auto Scroll for Tables on Mobile */
    .doc-body table {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .doc-meta {
        gap: 10px;
        font-size: 0.75rem;
    }
    
    .doc-callout {
        padding: 12px 14px;
        margin: 16px 0;
        font-size: 0.9rem;
    }
    
    .doc-quote {
        padding: 12px 14px;
        margin: 16px 0;
        font-size: 0.88rem;
    }
    
    .doc-sidebar {
        max-height: none;
        position: static;
        border: none;
        padding: 0;
        box-shadow: none;
    }
}

@media (max-width: 575.98px) {
    .doc-brand {
        font-size: 1.05rem;
    }
    .doc-brand-badge {
        font-size: 0.6rem;
        padding: 2px 6px;
    }
    .doc-navbar {
        padding-top: 6px !important;
        padding-bottom: 6px !important;
    }
    .doc-navbar .btn-group a {
        font-size: 0.68rem !important;
        padding: 2px 6px !important;
    }
}