/* Design System & Visual Style Guide: Liquid Glass UI */

:root {
    /* Fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', var(--font-primary);
    
    /* Layout Sizes */
    --sidebar-width: 280px;
    --header-height: 70px;
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: 0.6s cubic-bezier(0.25, 1, 0.5, 1);

    /* Theme variables - DARK (Default) */
    --bg-color: #07080d;
    --panel-bg: rgba(13, 14, 25, 0.45);
    --panel-border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(255, 255, 255, 0.025);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(255, 255, 255, 0.16);
    --input-bg: rgba(255, 255, 255, 0.03);
    --input-border: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-color: #7c3aed;
    --accent-rgb: 124, 58, 237;
    --accent-secondary: #06b6d4;
    --accent-secondary-rgb: 6, 182, 212;
    --accent-gradient: linear-gradient(135deg, #8b5cf6, #06b6d4);
    --accent-gradient-hover: linear-gradient(135deg, #a78bfa, #22d3ee);
    
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glass-blur: blur(25px);
    --glass-saturate: saturate(180%);
    --panel-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.3);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    --glow-opacity: 0.15;
    
    /* Background blob colors */
    --blob-1-color: rgba(139, 92, 246, 0.18);
    --blob-2-color: rgba(6, 182, 212, 0.15);
    --blob-3-color: rgba(244, 63, 94, 0.12);
    --blob-4-color: rgba(245, 158, 11, 0.1);
    
    /* Scrollbar */
    --scrollbar-track: rgba(255, 255, 255, 0.02);
    --scrollbar-thumb: rgba(255, 255, 255, 0.1);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);
}

/* Light Theme Variables Override */
.light-theme {
    --bg-color: #f3f4f9;
    --panel-bg: rgba(255, 255, 255, 0.55);
    --panel-border: rgba(255, 255, 255, 0.45);
    --card-bg: rgba(255, 255, 255, 0.3);
    --card-border: rgba(255, 255, 255, 0.4);
    --card-hover-border: rgba(255, 255, 255, 0.8);
    --input-bg: rgba(255, 255, 255, 0.4);
    --input-border: rgba(255, 255, 255, 0.5);
    
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --accent-color: #6d28d9;
    --accent-rgb: 109, 40, 217;
    --accent-secondary: #0891b2;
    --accent-secondary-rgb: 8, 145, 178;
    --accent-gradient: linear-gradient(135deg, #6d28d9, #0891b2);
    --accent-gradient-hover: linear-gradient(135deg, #7c3aed, #06b6d4);
    
    --shadow-color: rgba(31, 38, 135, 0.05);
    --glass-blur: blur(20px);
    --glass-saturate: saturate(150%);
    --panel-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.08);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
    --glow-opacity: 0.07;
    
    /* Background blob colors */
    --blob-1-color: rgba(167, 139, 250, 0.22);
    --blob-2-color: rgba(103, 232, 249, 0.2);
    --blob-3-color: rgba(253, 164, 175, 0.18);
    --blob-4-color: rgba(253, 186, 116, 0.15);
    
    /* Scrollbar */
    --scrollbar-track: rgba(0, 0, 0, 0.02);
    --scrollbar-thumb: rgba(0, 0, 0, 0.1);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.2);
}

/* Reset & Base Elements */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-slow), color var(--transition-fast);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* Hide default buttons outline */
button, input, select, textarea {
    outline: none;
    border: none;
    font-family: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Dynamic Ambient Light Background */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    mix-blend-mode: normal;
    opacity: 0.85;
    transition: background-color var(--transition-slow);
}

.blob-purple {
    top: -50px;
    left: 10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--blob-1-color) 0%, transparent 70%);
    animation: float-orb-1 25s ease-in-out infinite alternate;
}

.blob-cyan {
    top: 40%;
    right: 5%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--blob-2-color) 0%, transparent 70%);
    animation: float-orb-2 30s ease-in-out infinite alternate;
}

.blob-rose {
    bottom: -100px;
    left: 15%;
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, var(--blob-3-color) 0%, transparent 70%);
    animation: float-orb-3 28s ease-in-out infinite alternate;
}

.blob-orange {
    top: 15%;
    right: 35%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--blob-4-color) 0%, transparent 70%);
    animation: float-orb-4 22s ease-in-out infinite alternate;
}

/* Float Animations for Orbs */
@keyframes float-orb-1 {
    0% { transform: translate(0, 0) rotate(0deg) scale(1); }
    100% { transform: translate(120px, 80px) rotate(180deg) scale(1.15); }
}

@keyframes float-orb-2 {
    0% { transform: translate(0, 0) rotate(0deg) scale(1.1); }
    100% { transform: translate(-100px, -90px) rotate(-120deg) scale(0.9); }
}

@keyframes float-orb-3 {
    0% { transform: translate(0, 0) rotate(0deg) scale(0.95); }
    100% { transform: translate(90px, -110px) rotate(90deg) scale(1.05); }
}

@keyframes float-orb-4 {
    0% { transform: translate(0, 0) rotate(0deg) scale(1); }
    100% { transform: translate(-80px, 100px) rotate(-200deg) scale(1.2); }
}

/* Liquid Glass Panels */
.glass-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--panel-shadow);
    border-radius: var(--border-radius-md);
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--panel-shadow);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-slow), background-color var(--transition-slow), border-color var(--transition-slow);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border-bottom: 1px solid var(--panel-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.35rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 8px rgba(var(--accent-rgb), 0.3));
}

.logo-text {
    font-weight: 800;
}

.accent-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu-close-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.menu-close-btn:hover {
    color: var(--accent-color);
}

/* Sidebar Scroll Menu */
.sidebar-scroll-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 14px;
}

.sidebar-scroll-container::-webkit-scrollbar {
    width: 5px;
}

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

.nav-item-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.nav-item-link i {
    width: 20px;
    text-align: center;
    font-size: 1.05rem;
    transition: transform var(--transition-normal);
}

.nav-item-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item-link:hover i {
    transform: scale(1.15);
}

.nav-item.active .nav-item-link {
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--text-primary);
    border-left: 3px solid var(--accent-color);
    padding-left: 13px;
    font-weight: 700;
}

.nav-item.active .nav-item-link i {
    color: var(--accent-secondary);
}

/* Loading Skeleton Placeholders for Nav */
.loading-placeholder-nav {
    padding: 12px 16px;
}

.nav-skeleton-bar {
    display: block;
    height: 18px;
    width: 80%;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.02) 25%, rgba(255, 255, 255, 0.07) 50%, rgba(255, 255, 255, 0.02) 75%);
    background-size: 200% 100%;
    animation: loading-pulse 1.5s infinite;
    border-radius: 4px;
}

@keyframes loading-pulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--panel-border);
}

/* Theme Toggle Button */
.theme-toggle-btn-large {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--panel-border);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle-btn-large:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.theme-toggle-btn-large i {
    font-size: 1.1rem;
    transition: transform var(--transition-normal);
}

.theme-toggle-btn-large:hover i {
    transform: rotate(30deg);
}

/* Mobile Header (Hidden on Desktop) */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 0 20px;
    align-items: center;
    justify-content: space-between;
    z-index: 95;
    box-shadow: var(--panel-shadow);
}

.menu-toggle-btn {
    font-size: 1.4rem;
    color: var(--text-primary);
    background: transparent;
    cursor: pointer;
}

.theme-toggle-btn {
    font-size: 1.25rem;
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* Drawer Overlay for Mobile */
.drawer-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 98;
}

.drawer-overlay.visible {
    display: block;
}

/* Main Content Wrapper Layout */
.main-wrapper {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: margin-left var(--transition-slow);
}

/* Sticky Sub-Header bar */
.top-nav-bar {
    position: sticky;
    top: 0;
    width: 100%;
    height: 55px;
    background: rgba(var(--accent-rgb), 0.02);
    border-bottom: 1px solid var(--panel-border);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    z-index: 80;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.scroll-progress-container {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
}

.scroll-progress-bar {
    height: 100%;
    width: 0;
    background: var(--accent-gradient);
}

.current-section-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.current-section-title::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-secondary);
    box-shadow: 0 0 8px var(--accent-secondary);
}

.quick-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.quick-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--panel-border);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.quick-link:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.06);
}

.quick-link i {
    color: #ff5e57;
}

.back-to-top-btn {
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1rem;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.back-to-top-btn:hover {
    color: var(--accent-color);
    background: rgba(255,255,255,0.05);
}

/* Scrollable Main Content Space */
.main-content {
    flex: 1;
    padding: 40px 40px 80px 40px;
}

/* Hero Section */
.hero-section {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 48px;
    margin-top: 15px;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 2.5rem;
    letter-spacing: -1px;
    line-height: 1.2;
    margin-bottom: 12px;
    background: linear-gradient(to right, var(--text-primary) 30%, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Glassmorphic Search Dashboard */
.search-dashboard {
    padding: 24px;
    margin-top: 8px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--panel-shadow);
    transition: border-color var(--transition-fast);
}

.search-dashboard:focus-within {
    border-color: rgba(var(--accent-rgb), 0.4);
}

.search-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 14px;
    overflow-x: auto;
}

.search-tabs::-webkit-scrollbar {
    height: 3px;
}

.search-tab {
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.search-tab:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.search-tab.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.search-tab.active i {
    color: var(--accent-secondary);
}

/* Search Form Control */
.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius-md);
    padding: 4px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.15);
}

.search-icon {
    padding-left: 18px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.search-input {
    flex: 1;
    background: transparent;
    padding: 14px 12px;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.search-input::placeholder {
    color: var(--text-muted);
    font-weight: 500;
}

.clear-search-btn {
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0 12px;
    display: none;
    transition: color var(--transition-fast);
}

.clear-search-btn.visible {
    display: block;
}

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

.search-submit-btn {
    background: var(--accent-gradient);
    color: #fff;
    cursor: pointer;
    font-weight: 700;
    padding: 0 24px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.search-submit-btn:hover {
    background: var(--accent-gradient-hover);
    box-shadow: 0 6px 16px rgba(var(--accent-rgb), 0.4);
    transform: translateY(-1px);
}

.search-submit-btn:active {
    transform: translateY(1px);
}

/* Search Suggestions tags */
.search-suggestions {
    margin-top: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.suggestion-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.suggestion-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.suggestion-tag-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 15px;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.suggestion-tag-btn:hover {
    background: rgba(var(--accent-rgb), 0.1);
    border-color: rgba(var(--accent-rgb), 0.3);
    color: var(--text-primary);
}

/* Loading State Container */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 100px 0;
}

.spinner-glass {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 3px solid var(--panel-border);
    border-top-color: var(--accent-color);
    animation: spin 1s linear infinite;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
}

.spinner-core {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: var(--accent-gradient);
    opacity: 0.6;
    filter: blur(2px);
}

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

.loading-text {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Sections Structure */
.nav-section {
    margin-bottom: 60px;
    scroll-margin-top: 80px; /* Offset for sticky sub-header bar */
    animation: fade-in-up 0.6s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 14px;
    flex-wrap: wrap;
    gap: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.45rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--accent-secondary);
    font-size: 1.35rem;
    filter: drop-shadow(0 2px 6px rgba(var(--accent-secondary-rgb), 0.2));
}

.section-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-count-badge {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 8px;
}

/* Horizontal Subcategory Tabs */
.subcategory-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    max-width: 100%;
    padding: 2px;
}

.subcategory-tabs::-webkit-scrollbar {
    height: 3px;
}

.subcat-tab-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.subcat-tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.subcat-tab-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.2);
}

/* Card Lists Responsive Grid Layout */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 20px;
}

/* Liquid Glass Cards */
.glass-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 20px;
    cursor: pointer;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

/* Cursor Glow Spotlight Shader for Card */
.glass-card.spotlight-card {
    /* Spotlight glow relies on radial gradient with absolute tracking position variables */
    background: radial-gradient(400px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(255, 255, 255, var(--glow-opacity)), transparent 40%), var(--card-bg);
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-border);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3), 0 0 16px rgba(var(--accent-rgb), 0.1);
}

.card-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 14px;
}

.card-top {
    display: flex;
    align-items: center;
    gap: 14px;
}

.card-icon-container {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: inset 0 2px 8px rgba(255, 255, 255, 0.05);
}

.card-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.glass-card:hover .card-icon {
    transform: scale(1.08);
}

.card-name-wrapper {
    flex: 1;
    overflow: hidden;
}

.card-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
    letter-spacing: -0.2px;
    line-height: 1.3;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-tag {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 6px;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent-secondary);
    border-radius: 4px;
    display: inline-block;
}

.card-body-text {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
    /* Multiline truncation (2 lines) */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 2.6rem;
}

.card-action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.visit-link {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--accent-secondary);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.glass-card:hover .visit-link {
    color: var(--text-primary);
    transform: translateX(2px);
}

/* Fallback SVG Letter-based card icons styling */
.fallback-letter-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.35rem;
    color: #fff;
    text-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

/* Empty Search Results UI card */
.empty-glass-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 60px 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--panel-shadow);
    text-align: center;
    max-width: 600px;
    margin: 40px auto;
    animation: fade-in-up 0.4s ease-out forwards;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.empty-glass-card h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.empty-glass-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 30px;
}

.empty-action-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.empty-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--panel-border);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.empty-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.empty-btn i {
    font-size: 1rem;
}

.empty-btn:first-child i {
    color: #4285f4;
}

.empty-btn:last-child i {
    color: #00a1f1;
}

/* Helper Utilities */
.hidden {
    display: none !important;
}

/* Footer Section */
.main-footer {
    padding: 0 40px 40px 40px;
    margin-top: auto;
}

.footer-glass {
    padding: 24px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    gap: 16px;
}

.heart-pulse {
    color: #ef4444;
    display: inline-block;
    animation: heart-beat 1.2s infinite;
}

@keyframes heart-beat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-link-item {
    transition: color var(--transition-fast);
}

.footer-link-item:hover {
    color: var(--accent-secondary);
}

.divider {
    color: var(--panel-border);
}

/* About Dialog Modal styling */
.about-dialog {
    border: 1px solid var(--panel-border);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    background: rgba(13, 14, 25, 0.85); /* Slightly darker glass for readibility */
    max-width: 500px;
    width: 90%;
    margin: auto;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 24px;
    z-index: 120;
    color: var(--text-primary);
}

.about-dialog::backdrop {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
}

.dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 12px;
}

.dialog-header h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
}

.dialog-close-btn {
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: color var(--transition-fast);
}

.dialog-close-btn:hover {
    color: var(--accent-color);
}

.dialog-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 0.92rem;
    line-height: 1.6;
}

.dialog-body h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-top: 8px;
    color: var(--accent-secondary);
}

.dialog-body ul {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-left: 18px;
    list-style-type: disc;
}

.dialog-version {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 12px;
}

/* Responsive Breakpoints Rules */

/* Desktop & Large screens styling updates */
@media (min-width: 1900px) {
    .main-content {
        max-width: 1400px;
        margin-left: auto;
        margin-right: auto;
        width: 100%;
    }
}

/* Tablet viewports styling */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 20px 0 40px rgba(0, 0, 0, 0.4);
    }
    
    .menu-close-btn {
        display: block;
    }
    
    .mobile-header {
        display: flex;
    }
    
    .main-wrapper {
        margin-left: 0;
        padding-top: var(--header-height);
    }
    
    .top-nav-bar {
        padding: 0 20px;
    }
    
    .main-content {
        padding: 24px 20px 60px 20px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
}

/* Mobile small viewports styling */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }
    
    .search-dashboard {
        padding: 16px;
    }
    
    .search-input-wrapper {
        flex-direction: column;
        background: transparent;
        border: none;
        gap: 12px;
        padding: 0;
    }
    
    .search-input-wrapper:focus-within {
        box-shadow: none;
    }
    
    .search-input {
        width: 100%;
        background: var(--input-bg);
        border: 1px solid var(--input-border);
        border-radius: var(--border-radius-md);
        padding-left: 45px;
    }
    
    .search-icon {
        position: absolute;
        left: 0;
        top: 20px;
        padding-left: 16px;
    }
    
    .clear-search-btn {
        position: absolute;
        right: 12px;
        top: 17px;
    }
    
    .search-submit-btn {
        width: 100%;
        justify-content: center;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-glass {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
    }
    
    .section-header-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .subcategory-tabs {
        width: 100%;
    }
}