@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    /* Premium Modern Palette - Light */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-card: #FFFFFF;
    --bg-hover: #F1F3F4;
    --bg-glass: rgba(255, 255, 255, 0.8);
    
    --text-primary: #1F1F1F;
    --text-secondary: #4D5156;
    --text-link: #1A0DAB;
    --text-url: #202124;
    
    --accent-blue: #4285F4;
    --accent-red: #EA4335;
    --accent-yellow: #FBBC05;
    --accent-green: #34A853;
    --accent-glow: rgba(66, 133, 244, 0.1);
    
    --border-divider: #DADCE0;
    --border-card: #DADCE0;
    --border-focus: #4285F4;
    
    --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 -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-google: 0 1px 6px rgba(32,33,36,0.28);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --font-main: 'Outfit', sans-serif;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-mode {
    --bg-primary: #0F0F0F;
    --bg-secondary: #1A1A1A;
    --bg-card: #1E1E1E;
    --bg-hover: #2D2D2D;
    --bg-glass: rgba(15, 15, 15, 0.8);
    
    --text-primary: #F1F1F1;
    --text-secondary: #AAAAAA;
    --text-link: #8AB4F8;
    --text-url: #E8EAED;
    
    --border-divider: #303030;
    --border-card: #3C4043;
    --border-focus: #8AB4F8;
    
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.4);
    --shadow-google: 0 1px 6px rgba(0,0,0,0.4);
    
    --accent-glow: rgba(138, 180, 248, 0.15);
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* UI Structure */
.top-nav-bar {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 12px;
    z-index: 1001;
}

#home-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    text-align: center;
}

.home-logo-styled {
    font-size: 80px;
    font-weight: 700;
    letter-spacing: -3px;
    margin-bottom: 30px;
    user-select: none;
}

.logo-small-wrap {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -2px;
    display: flex;
    gap: 1px;
}

/* Multicolored Logo Tokens */
.l-g { color: var(--accent-blue); }
.l-r { color: var(--accent-red); }
.l-y { color: var(--accent-yellow); }
.l-b { color: var(--accent-blue); }
.l-gn { color: var(--accent-green); }

.search-box-wrap {
    width: 100%;
    max-width: 584px;
    margin-bottom: 30px;
    position: relative;
}

.home-search-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.home-footer {
    position: fixed;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Standardized Scrollbars with Fallbacks */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-divider) transparent;
}

*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
    background-color: var(--border-divider);
    border-radius: 20px;
}
*::-webkit-scrollbar-thumb:hover { background-color: var(--text-secondary); }

/* Accessibility Helpers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease;
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-secondary);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Layout System */
/* Main Layout System - Centered & Robust */
/* Main Layout System - Reverted to Standard Padding Model */
.main-wrapper {
    display: contents; /* effectively remove this wrapper's influence */
}

.main-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    padding: 20px 40px 100px 160px; /* Standard Google alignment */
    width: 100vw;
    box-sizing: border-box;
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 1fr;
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .sidebar-container { 
        display: block; /* Keep visible, just stacked */
        width: 100%;
        margin-top: 40px;
    }
}

/* Header & Navigation */
/* Header & Navigation - Reverted to Fixed Padding */
.results-header {
    position: sticky;
    top: 0;
    height: 64px;
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid var(--border-divider);
    display: flex;
    align-items: center;
    padding: 0 40px 0 160px; /* Standard alignment */
    gap: 40px;
    box-shadow: none;
}

.header-content-inner {
    display: contents; /* Neutralize the inner wrapper */
}

.header-search-box {
    flex: 1;
    max-width: 692px;
}

.small-logo-styled {
    flex-shrink: 0;
    text-decoration: none;
}

/* Navigation & Filters - Reverted */
.category-nav {
    padding-left: 180px;
    background: var(--bg-glass);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 60px;
    z-index: 90;
    border-bottom: 1px solid var(--border-divider);
    width: 100%;
}

.nav-content-inner {
    display: flex;
    gap: 24px;
    /* Remove the centered max-width constraint */
}

.filter-bar {
    padding-left: 180px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-divider);
    padding-top: 8px;
    padding-bottom: 8px;
    position: sticky;
    top: 105px;
    z-index: 80;
}

.filter-content-inner {
    display: flex;
    gap: 12px;
}

.cat-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 1rem 0;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: var(--transition-base);
}

.cat-btn:hover { color: var(--accent-blue); }
.cat-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

/* Removed the old filter-bar definition to replace with the new structure above */

.filter-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-divider);
    border-radius: var(--radius-sm);
    padding: 6px 32px 6px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
    font-family: inherit;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234D5156' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}

.filter-select:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Components */
.icon-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-divider);
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

/* Search Input Logic */
.search-input-inner {
    position: relative;
    width: 100%;
}

.search-icon-svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.search-actions-inner {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 12px;
    align-items: center;
}

.voice-btn {
    padding: 6px !important;
}

.voice-active {
    animation: voicePulse 1.5s infinite;
    background: var(--accent-glow) !important;
}

@keyframes voicePulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.google-search-bar, .header-input-google {
    width: 100%;
    padding: 12px 100px 12px 52px !important;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 16px;
    border: 1px solid var(--border-divider);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.google-search-bar:focus, .header-input-google:focus {
    box-shadow: var(--shadow-lg), 0 0 0 4px var(--accent-glow);
    border-color: var(--border-focus);
}

.lucky-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-divider);
    color: var(--text-primary);
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.lucky-btn:hover {
    background: var(--bg-hover);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-item {
    animation: fadeInUp 0.4s ease-out forwards;
}

/* Sidebar Knowledge Graph */
.summary-card {
    background: var(--bg-card);
    border: 1px solid var(--border-divider);
    border-radius: var(--radius-md);
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.summary-card:hover {
    box-shadow: var(--shadow-lg);
}

/* Toggle Switch Premium */
.switch { position: relative; display: inline-block; width: 48px; height: 26px; }
.slider { background-color: var(--border-divider); border-radius: 34px; }
.slider:before { height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; box-shadow: var(--shadow-sm); }
input:checked + .slider { background-color: var(--accent-blue); }
input:checked + .slider:before { transform: translateX(22px); }

/* Visual Pagination (Google Style) */
.pagination-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 50px 0;
    font-family: 'Outfit', sans-serif;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.pag-letter {
    font-size: 32px;
    font-weight: 700;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: transform 0.2s;
    text-decoration: none;
    margin: 0 1px;
}

.pag-letter:hover {
    transform: translateY(-5px);
}

.pag-letter span {
    font-size: 13px;
    color: var(--accent-blue);
    margin-top: 4px;
    font-weight: 500;
}

.pag-letter.active span {
    color: var(--text-primary);
}

.pag-letter.l-m { color: var(--accent-blue); cursor: default; }
.pag-letter.l-e { color: var(--accent-red); }
.pag-letter.l-e.active { color: var(--accent-yellow); }
.pag-letter.l-t { color: var(--accent-blue); cursor: default; }
.pag-letter.l-h { color: var(--accent-green); cursor: default; }
.pag-letter.l-s { color: var(--accent-red); cursor: default; }

.pag-nav-btn {
    font-size: 14px;
    color: var(--accent-blue);
    text-decoration: none;
    padding: 10px 20px;
    font-weight: 600;
}

.pag-nav-btn:hover {
    text-decoration: underline;
}

.pag-nav-btn.prev { margin-right: 20px; }
.pag-nav-btn.next { margin-left: 20px; }

/* Drawer & Overlay */
.settings-drawer {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border-divider);
}

.settings-drawer.open { right: 0; }

.drawer-header {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-divider);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
}

.drawer-header h3 {
    margin: 0;
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
}

.drawer-content {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
}

.settings-group {
    margin-bottom: 40px;
}

.settings-group h4 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    margin: 0 0 20px 0;
    font-weight: 600;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-divider);
}

.setting-item label {
    font-weight: 500;
    color: var(--text-primary);
}

.setting-item.settings-column {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.instance-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-divider);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    transition: var(--transition-base);
}

.instance-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-glow);
    outline: none;
}

.check-btn {
    width: 100%;
}

.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.drawer-overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* --- MOBILE RESPONSIVENESS CAPABILITIES --- */

@media (max-width: 1024px) {
    .main-layout {
        gap: 30px;
    }
    .sidebar-container {
        order: -1; /* Show above results on mobile/tablet for quick info */
        margin-bottom: 30px;
        margin-top: 0;
    }
    /* Nav & Filter padding handled by inner wrappers now */
}

@media (max-width: 768px) {
    /* Header Polish - Mobile Row Layout */
    .results-header {
        padding: 10px 15px;
        gap: 15px;
        height: auto;
        flex-wrap: wrap; /* allow wrapping if needed, but prefer row */
    }
    
    .header-search-box {
        width: 100%; /* Force search bar to new line on very small screens if needed, otherwise flex takes care */
        order: 2; /* Put search bar below logo on mobile */
        margin-top: 10px;
    }

    .small-logo-styled {
        order: 1;
    }
    
    /* Ensure padding is reset for mobile */
    .category-nav, .filter-bar { 
        padding-left: 15px;
    }

    .small-logo-styled {
        margin-bottom: 5px;
    }

    /* Navigation - Horizontal Scroll */
    .category-nav {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding: 0 15px;
    }
    
    .nav-container {
        gap: 1.25rem;
    }

    .filter-bar {
        padding: 10px 15px;
        overflow-x: auto;
    }

    /* Layout Adjustments */
    .main-layout {
        padding: 15px;
    }
    
    .sidebar-container {
        width: 100% !important;
    }

    .result-item {
        max-width: 100%;
        padding: 15px 0;
    }

    .result-title {
        font-size: 1.15rem;
    }

    /* Pagination Scaling */
    .pagination-visual {
        transform: scale(0.85);
        padding: 30px 0;
    }

    .pag-letter {
        font-size: 24px;
    }

    /* Settings Modal */
    .settings-drawer {
        width: 85%;
        right: -85%;
    }
}

@media (max-width: 480px) {
    .home-logo-styled {
        font-size: clamp(40px, 12vw, 64px);
        letter-spacing: -2px;
    }

    .home-search-actions {
        flex-direction: column;
        width: 100%;
        padding: 0 20px;
    }

    .lucky-btn {
        width: 100%;
    }

    .pagination-visual {
        transform: scale(0.7);
        flex-wrap: wrap;
        gap: 10px;
    }

    .pag-nav-btn {
        padding: 8px 12px;
    }
}