/* Custom Premium CSS for Zotela User Guide */

/* CSS Variables */
:root {
    --primary-color: #6366f1; /* Indigo */
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    --accent-gradient: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
    --font-headings: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Light Mode Tokens */
    --bg-app: #f8fafc;
    --bg-header: rgba(255, 255, 255, 0.85);
    --bg-sidebar: #ffffff;
    --bg-content: #ffffff;
    --bg-code: #f1f5f9;
    --bg-hover: #f1f5f9;
    --bg-active: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    
    /* Alert Colors - Light */
    --note-bg: #eff6ff;
    --note-border: #3b82f6;
    --note-text: #1e3a8a;
    --tip-bg: #f0fdf4;
    --tip-border: #22c55e;
    --tip-text: #14532d;
    --important-bg: #faf5ff;
    --important-border: #a855f7;
    --important-text: #581c87;
    --warning-bg: #fffbeb;
    --warning-border: #f59e0b;
    --warning-text: #78350f;
    --caution-bg: #fef2f2;
    --caution-border: #ef4444;
    --caution-text: #7f1d1d;
    
    --sidebar-width: 320px;
    --header-height: 70px;
    --transition-speed: 0.3s;
}

body.dark-mode {
    /* Dark Mode Tokens */
    --bg-app: #0b0f19;
    --bg-header: rgba(15, 23, 42, 0.85);
    --bg-sidebar: #0f172a;
    --bg-content: #1e293b;
    --bg-code: #0f172a;
    --bg-hover: #1e293b;
    --bg-active: #334155;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    
    /* Alert Colors - Dark */
    --note-bg: rgba(59, 130, 246, 0.15);
    --note-border: #3b82f6;
    --note-text: #93c5fd;
    --tip-bg: rgba(34, 197, 94, 0.15);
    --tip-border: #22c55e;
    --tip-text: #86efac;
    --important-bg: rgba(168, 85, 247, 0.15);
    --important-border: #a855f7;
    --important-text: #d8b4fe;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --warning-border: #f59e0b;
    --warning-text: #fde047;
    --caution-bg: rgba(239, 68, 68, 0.15);
    --caution-border: #ef4444;
    --caution-text: #fca5a5;
}

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-app);
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Layout */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    padding: 0 2rem;
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

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

.brand-logo img {
    height: 38px;
    object-fit: contain;
    display: block;
}

.mobile-toggle-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color var(--transition-speed);
}

.mobile-toggle-btn:hover {
    background-color: var(--bg-hover);
}

.header-center {
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-app);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    width: 100%;
    position: relative;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.search-icon {
    color: var(--text-muted);
    margin-right: 0.75rem;
}

.search-box input {
    background: none;
    border: none;
    color: var(--text-primary);
    width: 100%;
    outline: none;
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.search-clear-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.2rem;
    position: absolute;
    right: 1rem;
}

.search-clear-btn:hover {
    color: var(--text-primary);
}

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

/* Language selector */
.lang-selector {
    display: flex;
    background-color: var(--bg-app);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    padding: 2px;
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-headings);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    cursor: pointer;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 9999px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.theme-toggle-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-muted);
}

/* Main Container and Sidebar */
.main-container {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    position: relative;
}

.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    z-index: 90;
    overflow-y: auto;
    padding: 2rem 1.25rem;
    transition: transform var(--transition-speed), background-color var(--transition-speed), border-color var(--transition-speed);
}

/* Custom scrollbar for sidebar */
.app-sidebar::-webkit-scrollbar {
    width: 6px;
}
.app-sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.app-sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}
.app-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.nav-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-section-title {
    font-family: var(--font-headings);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 700;
    padding-left: 0.75rem;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item-link {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.nav-item-link:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item-link.active {
    background-color: var(--bg-active);
    color: var(--primary-color);
    font-weight: 600;
}

/* Content Area */
.content-area {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 3rem 4rem;
    max-width: 1080px;
    min-width: 0; /* Prevents flex items from overflowing */
}

/* Markdown Rendering */
.markdown-body {
    flex: 1;
    color: var(--text-primary);
    line-height: 1.75;
}

.markdown-body h1 {
    font-family: var(--font-headings);
    font-size: 2.5rem;
    font-weight: 800;
    margin-top: 0;
    margin-bottom: 1.5rem;
    line-height: 1.25;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.markdown-body h2 {
    font-family: var(--font-headings);
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 1rem;
    line-height: 1.35;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.markdown-body h3 {
    font-family: var(--font-headings);
    font-size: 1.35rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.markdown-body p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.markdown-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.markdown-body ul, .markdown-body ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.markdown-body li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.markdown-body li::marker {
    color: var(--primary-color);
}

.markdown-body code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.2rem 0.4rem;
    background-color: var(--bg-code);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: #e11d48; /* Pink accent for inline codes */
    word-break: break-all;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

body.dark-mode .markdown-body code {
    color: #fda4af;
}

.markdown-body pre {
    margin-bottom: 1.5rem;
    border-radius: 12px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.markdown-body pre code {
    background: none;
    border: none;
    color: inherit;
    padding: 1.25rem;
    display: block;
    font-size: 0.9rem;
    word-break: normal;
}

/* Alert Boxes (GitHub Markdown style) */
.markdown-body blockquote {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 10px;
    border-left: 5px solid var(--border-color);
    background-color: var(--bg-hover);
    transition: background-color var(--transition-speed);
}

.markdown-body blockquote p {
    margin-bottom: 0;
    color: var(--text-primary);
}

/* GitHub Alert Overrides */
.markdown-body .alert-box {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    border-left: 5px solid transparent;
}

.markdown-body .alert-box p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.markdown-body .alert-title {
    font-weight: 700;
    font-family: var(--font-headings);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.markdown-body .alert-note {
    background-color: var(--note-bg);
    border-color: var(--note-border);
    color: var(--note-text);
}
.markdown-body .alert-note p { color: var(--note-text); }

.markdown-body .alert-tip {
    background-color: var(--tip-bg);
    border-color: var(--tip-border);
    color: var(--tip-text);
}
.markdown-body .alert-tip p { color: var(--tip-text); }

.markdown-body .alert-important {
    background-color: var(--important-bg);
    border-color: var(--important-border);
    color: var(--important-text);
}
.markdown-body .alert-important p { color: var(--important-text); }

.markdown-body .alert-warning {
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
    color: var(--warning-text);
}
.markdown-body .alert-warning p { color: var(--warning-text); }

.markdown-body .alert-caution {
    background-color: var(--caution-bg);
    border-color: var(--caution-border);
    color: var(--caution-text);
}
.markdown-body .alert-caution p { color: var(--caution-text); }

/* Tables in Markdown */
.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.markdown-body th, .markdown-body td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.markdown-body th {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-headings);
}

.markdown-body td {
    color: var(--text-secondary);
}

.markdown-body tr:last-child td {
    border-bottom: none;
}

.markdown-body tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Spinner Loading */
.loading-spinner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 300px;
    color: var(--text-muted);
    gap: 1rem;
}

.loading-spinner i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

/* Search results screen */
.search-results-container h2 {
    font-family: var(--font-headings);
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.search-result-item {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color var(--transition-speed);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.search-result-item:hover {
    background-color: var(--bg-hover);
}

.search-result-title {
    font-family: var(--font-headings);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.search-result-snippet {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.search-result-snippet mark {
    background-color: rgba(253, 224, 71, 0.4);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

body.dark-mode .search-result-snippet mark {
    background-color: rgba(253, 224, 71, 0.25);
}

.no-results {
    padding: 3rem 0;
    text-align: center;
    color: var(--text-secondary);
}

.no-results i {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Footer Navigation Controls */
.content-footer {
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.footer-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
}

.footer-nav-btn {
    background-color: var(--bg-content);
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 200px;
    max-width: 320px;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}

.footer-nav-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

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

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

.nav-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
}

.nav-title {
    font-family: var(--font-headings);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-copyright {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--header-height);
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 85;
}

/* Mobile Responsiveness */
@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    
    .app-sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar-overlay.open {
        display: block;
    }
    
    .content-area {
        margin-left: 0;
        padding: 2rem 2rem;
    }
    
    .mobile-toggle-btn {
        display: block;
    }
    
    .header-center {
        margin: 0 1rem;
    }
}

@media (max-width: 576px) {
    .app-header {
        padding: 0 1rem;
    }
    
    .header-center {
        display: none; /* Hide search in header on very small screens, or we can handle it inside burger */
    }
    
    .lang-selector {
        padding: 1px;
    }
    
    .lang-btn {
        padding: 0.3rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .content-area {
        padding: 1.5rem 1rem;
    }
    
    .markdown-body h1 {
        font-size: 2rem;
    }
    
    .footer-nav {
        flex-direction: column;
    }
    
    .footer-nav-btn {
        max-width: 100%;
        width: 100%;
    }
}