/* ========================================
   PAST PAPERS - CYBERPUNK UI DESIGN SYSTEM
   Completely separate from main site styles
   ======================================== */

/* Design Tokens - Cyberpunk Theme */
:root {
    /* Base Colors - Dark Charcoal/Matte Black */
    --pp-bg-primary: #0a0a0a;
    --pp-bg-secondary: #1a1a1a;
    --pp-bg-tertiary: #252525;
    --pp-bg-elevated: #2a2a2a;

    /* Accent Colors - Subtle Blue & Violet Glows */
    --pp-accent-blue: #3b82f6;
    --pp-accent-blue-glow: rgba(59, 130, 246, 0.1);
    --pp-accent-violet: #8b5cf6;
    --pp-accent-violet-glow: rgba(139, 92, 246, 0.1);

    /* Text Colors */
    --pp-text-primary: #ffffff;
    --pp-text-secondary: #e5e7eb;
    --pp-text-tertiary: #9ca3af;
    --pp-text-muted: #6b7280;

    /* Glassmorphism */
    --pp-glass-bg: rgba(255, 255, 255, 0.05);
    --pp-glass-bg-hover: rgba(255, 255, 255, 0.08);
    --pp-glass-border: rgba(255, 255, 255, 0.1);
    --pp-glass-blur: blur(12px);
    --pp-glass-saturate: saturate(180%);

    /* Glow Levels - Use Sparingly */
    --pp-glow-subtle: rgba(59, 130, 246, 0.1);
    --pp-glow-medium: rgba(59, 130, 246, 0.2);
    --pp-glow-strong: rgba(59, 130, 246, 0.3);

    /* Typography Scale */
    --pp-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --pp-font-size-xs: 0.75rem;
    /* 12px */
    --pp-font-size-sm: 0.875rem;
    /* 14px */
    --pp-font-size-base: 1rem;
    /* 16px */
    --pp-font-size-lg: 1.125rem;
    /* 18px */
    --pp-font-size-xl: 1.25rem;
    /* 20px */
    --pp-font-size-2xl: 1.5rem;
    /* 24px */
    --pp-font-size-3xl: 2rem;
    /* 32px */
    --pp-font-size-4xl: 3rem;
    /* 48px */

    /* Spacing - 8px Base Unit */
    --pp-space-1: 0.5rem;
    /* 8px */
    --pp-space-2: 1rem;
    /* 16px */
    --pp-space-3: 1.5rem;
    /* 24px */
    --pp-space-4: 2rem;
    /* 32px */
    --pp-space-6: 3rem;
    /* 48px */
    --pp-space-8: 4rem;
    /* 64px */

    /* Border Radius */
    --pp-radius-sm: 0.5rem;
    /* 8px */
    --pp-radius-md: 0.75rem;
    /* 12px */
    --pp-radius-lg: 1rem;
    /* 16px */
    --pp-radius-xl: 1.5rem;
    /* 24px */

    /* Animation Durations */
    --pp-duration-fast: 150ms;
    --pp-duration-normal: 300ms;
    --pp-duration-slow: 500ms;

    /* Easing Functions */
    --pp-ease-out: cubic-bezier(0.4, 0, 0.2, 1);
    --pp-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --pp-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --pp-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --pp-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --pp-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    --pp-shadow-glow: 0 0 20px var(--pp-glow-subtle);
}

/* Reset and Base Styles */
.past-papers-page {
    font-family: var(--pp-font-family);
    background: var(--pp-bg-primary);
    color: var(--pp-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Typography */
.past-papers-page h1 {
    font-size: var(--pp-font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--pp-text-primary);
    margin: 0;
}

.past-papers-page h2 {
    font-size: var(--pp-font-size-3xl);
    font-weight: 600;
    line-height: 1.3;
    color: var(--pp-text-primary);
    margin: 0;
}

.past-papers-page h3 {
    font-size: var(--pp-font-size-2xl);
    font-weight: 600;
    line-height: 1.4;
    color: var(--pp-text-secondary);
    margin: 0;
}

.past-papers-page p {
    font-size: var(--pp-font-size-base);
    line-height: 1.6;
    color: var(--pp-text-secondary);
    margin: 0;
}

/* Glassmorphism Components */
.pp-glass-card {
    background: var(--pp-glass-bg);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-lg);
    box-shadow: var(--pp-shadow-md);
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-glass-card:hover {
    background: var(--pp-glass-bg-hover);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: var(--pp-shadow-lg);
}

/* Buttons */
.pp-button {
    padding: var(--pp-space-2) var(--pp-space-4);
    font-size: var(--pp-font-size-base);
    font-weight: 500;
    border-radius: var(--pp-radius-md);
    border: 1px solid var(--pp-glass-border);
    background: var(--pp-glass-bg);
    color: var(--pp-text-primary);
    cursor: pointer;
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
}

.pp-button:hover {
    background: var(--pp-glass-bg-hover);
    border-color: var(--pp-accent-blue);
    box-shadow: 0 0 15px var(--pp-glow-subtle);
    transform: translateY(-1px);
}

.pp-button:active {
    transform: translateY(0);
}

.pp-button-primary {
    background: linear-gradient(135deg, var(--pp-accent-blue), var(--pp-accent-violet));
    border: none;
    box-shadow: 0 4px 15px var(--pp-glow-medium);
}

.pp-button-primary:hover {
    box-shadow: 0 6px 20px var(--pp-glow-strong);
}

/* Animations - Smooth and Gentle */
@keyframes pp-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pp-slide-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pp-shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

.pp-fade-in {
    animation: pp-fade-in var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-slide-up {
    animation: pp-slide-up var(--pp-duration-slow) var(--pp-ease-out);
}

/* Loading Skeleton */
.pp-skeleton {
    background: linear-gradient(90deg,
            var(--pp-bg-secondary) 0%,
            var(--pp-bg-tertiary) 50%,
            var(--pp-bg-secondary) 100%);
    background-size: 200% 100%;
    animation: pp-shimmer 1.5s infinite;
    border-radius: var(--pp-radius-md);
}

/* Utility Classes */
.pp-text-muted {
    color: var(--pp-text-muted);
}

.pp-text-tertiary {
    color: var(--pp-text-tertiary);
}

.pp-glow-subtle {
    box-shadow: 0 0 10px var(--pp-glow-subtle);
}

.pp-glow-medium {
    box-shadow: 0 0 20px var(--pp-glow-medium);
}

/* Responsive Typography */
@media (max-width: 768px) {
    .past-papers-page h1 {
        font-size: var(--pp-font-size-3xl);
    }

    .past-papers-page h2 {
        font-size: var(--pp-font-size-2xl);
    }

    .past-papers-page h3 {
        font-size: var(--pp-font-size-xl);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   LAYOUT COMPONENTS
   ======================================== */

/* Main Layout Container */
.pp-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar - Filter Panel */
.pp-sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--pp-bg-secondary);
    border-right: 1px solid var(--pp-glass-border);
    padding: var(--pp-space-4);
    overflow-y: auto;
    position: sticky;
    top: 0;
    height: 100vh;
    transition: transform var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-sidebar.collapsed {
    transform: translateX(-100%);
}

/* Main Content Area */
.pp-main-content {
    flex: 1;
    padding: var(--pp-space-4);
    position: relative;
    min-height: 100vh;
}

/* Responsive Grid */
.pp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--pp-space-4);
    padding: var(--pp-space-4) 0;
}

@media (max-width: 768px) {
    .pp-grid {
        grid-template-columns: 1fr;
        gap: var(--pp-space-3);
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .pp-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .pp-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1440px) {
    .pp-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Floating Search Bar */
.pp-search-bar {
    position: fixed;
    top: 80px;
    right: var(--pp-space-4);
    z-index: 100;
    width: 320px;
    max-width: calc(100% - var(--pp-space-8));
}

.pp-search-input {
    width: 100%;
    padding: var(--pp-space-2) var(--pp-space-3);
    background: var(--pp-glass-bg);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-lg);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-base);
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-search-input:focus {
    outline: none;
    border-color: var(--pp-accent-blue);
    box-shadow: 0 0 15px var(--pp-glow-subtle);
}

.pp-search-input::placeholder {
    color: var(--pp-text-muted);
}

/* Floating Action Buttons */
.pp-fab-container {
    position: fixed;
    bottom: var(--pp-space-6);
    right: var(--pp-space-6);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: var(--pp-space-2);
}

.pp-fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--pp-glass-bg);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    color: var(--pp-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
    box-shadow: var(--pp-shadow-lg);
}

.pp-fab:hover {
    background: var(--pp-glass-bg-hover);
    border-color: var(--pp-accent-blue);
    box-shadow: 0 0 20px var(--pp-glow-medium);
    transform: translateY(-2px) scale(1.05);
}

/* ========================================
   PAPER CARD COMPONENT
   ======================================== */

.pp-paper-card {
    background: var(--pp-glass-bg);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-lg);
    padding: var(--pp-space-4);
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: var(--pp-space-3);
}

.pp-paper-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            var(--pp-accent-blue-glow) 0%,
            transparent 50%,
            var(--pp-accent-violet-glow) 100%);
    opacity: 0;
    transition: opacity var(--pp-duration-normal) var(--pp-ease-out);
    pointer-events: none;
}

.pp-paper-card:hover {
    background: var(--pp-glass-bg-hover);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5), 0 0 20px var(--pp-glow-subtle);
    transform: translateY(-4px) rotateX(2deg);
}

.pp-paper-card:hover::before {
    opacity: 1;
}

.pp-paper-card:focus {
    outline: 2px solid var(--pp-accent-blue);
    outline-offset: 2px;
}

/* Card Thumbnail */
.pp-card-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--pp-radius-md);
    background: var(--pp-bg-tertiary);
    opacity: 0;
    transition: opacity var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-card-thumbnail.loaded {
    opacity: 1;
}

/* Card Header */
.pp-card-header {
    display: flex;
    flex-direction: column;
    gap: var(--pp-space-1);
}

.pp-card-title {
    font-size: var(--pp-font-size-lg);
    font-weight: 600;
    color: var(--pp-text-primary);
    margin: 0;
    line-height: 1.4;
}

.pp-card-subject {
    font-size: var(--pp-font-size-sm);
    color: var(--pp-accent-blue);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Card Meta */
.pp-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pp-space-2);
    font-size: var(--pp-font-size-sm);
    color: var(--pp-text-tertiary);
}

.pp-card-meta-item {
    display: flex;
    align-items: center;
    gap: var(--pp-space-1);
}

/* Card Actions */
.pp-card-actions {
    display: flex;
    gap: var(--pp-space-2);
    margin-top: auto;
    padding-top: var(--pp-space-2);
    border-top: 1px solid var(--pp-glass-border);
}

.pp-card-action {
    flex: 1;
    padding: var(--pp-space-2);
    background: transparent;
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-sm);
    color: var(--pp-text-secondary);
    font-size: var(--pp-font-size-sm);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--pp-space-1);
}

.pp-card-action:hover {
    background: var(--pp-glass-bg-hover);
    border-color: var(--pp-accent-blue);
    color: var(--pp-text-primary);
}

.pp-card-action:active {
    transform: scale(0.95);
}

.pp-card-action.favorite.active {
    color: var(--pp-accent-violet);
    border-color: var(--pp-accent-violet);
}

/* Holographic Shimmer Effect */
@keyframes pp-holographic-shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.pp-paper-card:hover .pp-card-title {
    background: linear-gradient(90deg,
            var(--pp-text-primary) 0%,
            var(--pp-accent-blue) 50%,
            var(--pp-accent-violet) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pp-holographic-shimmer 2s ease-in-out infinite;
}

/* ========================================
   FILTER SIDEBAR COMPONENT
   ======================================== */

.pp-filter-section {
    margin-bottom: var(--pp-space-4);
}

.pp-filter-title {
    font-size: var(--pp-font-size-sm);
    font-weight: 600;
    color: var(--pp-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--pp-space-2);
    display: flex;
    align-items: center;
    gap: var(--pp-space-1);
}

.pp-filter-heading {
    font-size: var(--pp-font-size-base);
    font-weight: 600;
    color: var(--pp-text-secondary);
    margin-bottom: var(--pp-space-2);
}

.pp-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pp-space-1);
}

.pp-chip {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--pp-glass-border);
    background: var(--pp-glass-bg);
    color: var(--pp-text-secondary);
    font-size: var(--pp-font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-chip:hover {
    border-color: var(--pp-accent-blue);
    color: var(--pp-text-primary);
}

.pp-chip.active {
    background: var(--pp-accent-blue-glow);
    border-color: var(--pp-accent-blue);
    color: var(--pp-text-primary);
    box-shadow: 0 0 10px var(--pp-glow-subtle);
}

.pp-token-input {
    display: flex;
    gap: var(--pp-space-1);
    align-items: center;
}

.pp-token-input-field {
    flex: 1;
    padding: var(--pp-space-2);
    background: var(--pp-glass-bg);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-md);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-sm);
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-token-input-field::placeholder {
    color: var(--pp-text-muted);
}

.pp-token-input-field:focus {
    outline: none;
    border-color: var(--pp-accent-blue);
    box-shadow: 0 0 10px var(--pp-glow-subtle);
}

.pp-token-add {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    border-radius: var(--pp-radius-sm);
    border: 1px solid var(--pp-glass-border);
    background: var(--pp-glass-bg);
    color: var(--pp-text-secondary);
    font-size: var(--pp-font-size-sm);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-token-add:hover {
    border-color: var(--pp-accent-blue);
    color: var(--pp-text-primary);
}

.pp-token-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pp-space-1);
    margin-top: var(--pp-space-2);
}

.pp-token {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: var(--pp-accent-blue-glow);
    border: 1px solid var(--pp-accent-blue);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-xs);
    letter-spacing: 0.4px;
}

.pp-token-remove {
    background: transparent;
    border: none;
    color: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0;
}

.pp-token-remove i {
    font-size: 0.75rem;
}

.pp-token-placeholder {
    color: var(--pp-text-muted);
    font-size: var(--pp-font-size-xs);
}

/* Multi-select Dropdown */
.pp-multiselect {
    position: relative;
}

.pp-multiselect-trigger {
    width: 100%;
    padding: var(--pp-space-2) var(--pp-space-3);
    background: var(--pp-glass-bg);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-md);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-multiselect-trigger:hover {
    background: var(--pp-glass-bg-hover);
    border-color: var(--pp-accent-blue);
}

.pp-multiselect-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: var(--pp-space-1);
    background: var(--pp-bg-elevated);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    display: none;
}

.pp-multiselect-dropdown.open {
    display: block;
}

.pp-multiselect-search {
    padding: var(--pp-space-2);
    border-bottom: 1px solid var(--pp-glass-border);
}

.pp-multiselect-search input {
    width: 100%;
    padding: var(--pp-space-1) var(--pp-space-2);
    background: var(--pp-bg-tertiary);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-sm);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-sm);
}

.pp-multiselect-option {
    padding: var(--pp-space-2) var(--pp-space-3);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
    display: flex;
    align-items: center;
    gap: var(--pp-space-2);
}

.pp-multiselect-option:hover {
    background: var(--pp-glass-bg-hover);
}

.pp-multiselect-option input[type="checkbox"] {
    accent-color: var(--pp-accent-blue);
}

/* Checkbox Group */
.pp-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--pp-space-2);
}

.pp-checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--pp-space-2);
    padding: var(--pp-space-2);
    background: var(--pp-glass-bg);
    border-radius: var(--pp-radius-sm);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-checkbox-item:hover {
    background: var(--pp-glass-bg-hover);
}

.pp-checkbox-item input[type="checkbox"] {
    accent-color: var(--pp-accent-blue);
}

/* Radio Group */
.pp-radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--pp-space-2);
}

.pp-radio-item {
    display: flex;
    align-items: center;
    gap: var(--pp-space-2);
    padding: var(--pp-space-2);
    background: var(--pp-glass-bg);
    border-radius: var(--pp-radius-sm);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-radio-item:hover {
    background: var(--pp-glass-bg-hover);
}

.pp-radio-item input[type="radio"] {
    accent-color: var(--pp-accent-blue);
}

/* Year Range Slider */
.pp-range-slider {
    padding: var(--pp-space-3) 0;
}

.pp-range-inputs {
    display: flex;
    gap: var(--pp-space-2);
    margin-bottom: var(--pp-space-2);
}

.pp-range-input {
    flex: 1;
    padding: var(--pp-space-2);
    background: var(--pp-glass-bg);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-sm);
    color: var(--pp-text-primary);
    font-size: var(--pp-font-size-sm);
    text-align: center;
}

/* Filter Chips */
.pp-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--pp-space-2);
    margin-bottom: var(--pp-space-3);
}

.pp-filter-chip {
    display: flex;
    align-items: center;
    gap: var(--pp-space-1);
    padding: var(--pp-space-1) var(--pp-space-2);
    background: var(--pp-glass-bg);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-sm);
    font-size: var(--pp-font-size-xs);
    color: var(--pp-text-secondary);
}

.pp-filter-chip-remove {
    cursor: pointer;
    color: var(--pp-text-tertiary);
    transition: color var(--pp-duration-fast) var(--pp-ease-out);
}

.pp-filter-chip-remove:hover {
    color: var(--pp-text-primary);
}

/* Filter Count */
.pp-filter-count {
    padding: var(--pp-space-2);
    text-align: center;
    font-size: var(--pp-font-size-sm);
    color: var(--pp-text-tertiary);
    border-top: 1px solid var(--pp-glass-border);
    margin-top: var(--pp-space-4);
}

/* Clear Filters Button */
.pp-clear-filters {
    width: 100%;
    padding: var(--pp-space-2);
    background: transparent;
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-md);
    color: var(--pp-text-secondary);
    font-size: var(--pp-font-size-sm);
    cursor: pointer;
    transition: all var(--pp-duration-normal) var(--pp-ease-out);
    margin-top: var(--pp-space-2);
}

.pp-clear-filters:hover {
    background: var(--pp-glass-bg-hover);
    border-color: var(--pp-accent-violet);
    color: var(--pp-text-primary);
}

/* ========================================
   SIMPLE NOTIFICATION
   ======================================== */

.pp-simple-notification {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    z-index: 1200;
    pointer-events: none;
    padding: 0 var(--pp-space-4);
}

.pp-simple-notification-box {
    background: linear-gradient(135deg, #8b6914 0%, #2d5016 100%);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--pp-radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    color: var(--pp-text-primary);
    padding: var(--pp-space-3) var(--pp-space-4);
    font-size: var(--pp-font-size-base);
    font-weight: 500;
    text-align: center;
    max-width: 320px;
    width: 100%;
    opacity: 0;
    transform: translateY(-20px) scale(0.9);
    transition: opacity var(--pp-duration-normal) var(--pp-ease-out),
        transform var(--pp-duration-normal) var(--pp-ease-out);
    pointer-events: auto;
}

.pp-simple-notification-box.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.pp-simple-notification-box.hide {
    opacity: 0;
    transform: translateY(-20px) scale(0.9);
}

@media (max-width: 768px) {
    .pp-simple-notification {
        top: 70px;
        padding: 0 var(--pp-space-3);
    }
    
    .pp-simple-notification-box {
        max-width: 280px;
        padding: var(--pp-space-2) var(--pp-space-3);
        font-size: var(--pp-font-size-sm);
    }
}

.pp-notification-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.pp-notification-title {
    font-size: var(--pp-font-size-base);
    font-weight: 600;
    color: var(--pp-text-primary);
    margin: 0;
}

.pp-notification-message {
    font-size: var(--pp-font-size-sm);
    line-height: 1.55;
    color: var(--pp-text-secondary);
    margin: 0;
}

.pp-notification-message code,
.pp-notification-message kbd {
    background: rgba(59, 130, 246, 0.15);
    color: var(--pp-accent-blue);
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    font-size: 0.875em;
    font-family: var(--pp-font-family);
}

.pp-notification-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.5rem;
}

.pp-notification-tag {
    background: rgba(139, 92, 246, 0.18);
    color: var(--pp-text-primary);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: var(--pp-font-size-xs);
    letter-spacing: 0.4px;
    border: 1px solid rgba(139, 92, 246, 0.35);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.pp-notification-close {
    background: transparent;
    border: none;
    color: var(--pp-text-muted);
    cursor: pointer;
    font-size: var(--pp-font-size-base);
    padding: 0.35rem;
    border-radius: 999px;
    transition: color var(--pp-duration-fast) var(--pp-ease-out),
        background var(--pp-duration-fast) var(--pp-ease-out);
    margin-left: auto;
}

.pp-notification-close:hover {
    color: var(--pp-text-primary);
    background: rgba(255, 255, 255, 0.06);
}

@media (max-width: 768px) {
    .pp-notification-container {
        top: auto;
        bottom: 24px;
        right: 0;
        left: 0;
        align-items: center;
        padding: 0 var(--pp-space-2);
    }

    .pp-notification {
        width: 100%;
        max-width: 480px;
        transform: translateY(24px);
    }

    .pp-notification.show {
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {

    .pp-notification,
    .pp-notification.show {
        transition: none;
    }
}

/* ========================================
   MOBILE NAVIGATION
   ======================================== */

/* Bottom Sheet */
.pp-bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--pp-bg-secondary);
    border-top: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-xl) var(--pp-radius-xl) 0 0;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform var(--pp-duration-normal) var(--pp-ease-out);
    z-index: 200;
}

.pp-bottom-sheet.open {
    transform: translateY(0);
}

.pp-bottom-sheet-handle {
    width: 40px;
    height: 4px;
    background: var(--pp-text-tertiary);
    border-radius: 2px;
    margin: var(--pp-space-2) auto;
    cursor: grab;
}

.pp-bottom-sheet-handle:active {
    cursor: grabbing;
}

/* Mobile Backdrop */
.pp-mobile-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--pp-duration-normal) var(--pp-ease-out);
}

.pp-mobile-backdrop.visible {
    opacity: 1;
    pointer-events: all;
}

/* Mobile Sidebar Toggle */
.pp-mobile-sidebar-toggle {
    display: none;
}

/* Mobile Filter Section (Top) */
.pp-mobile-filters {
    display: none;
}

@media (max-width: 768px) {

    /* Hide desktop sidebar on mobile */
    .pp-sidebar {
        display: none;
    }

    /* Show mobile filters at top */
    .pp-mobile-filters {
        display: block;
        width: 100%;
        background: var(--pp-bg-secondary);
        border-bottom: 1px solid var(--pp-glass-border);
        padding: var(--pp-space-3);
        margin-bottom: var(--pp-space-4);
        border-radius: var(--pp-radius-lg);
    }

    .pp-mobile-filters .pp-filter-section {
        margin-bottom: var(--pp-space-3);
    }

    .pp-mobile-filters .pp-filter-section:last-child {
        margin-bottom: 0;
    }

    .pp-mobile-filters .pp-filter-title {
        font-size: var(--pp-font-size-lg);
        margin-bottom: var(--pp-space-3);
        padding-bottom: var(--pp-space-2);
        border-bottom: 1px solid var(--pp-glass-border);
    }

    .pp-mobile-filters .pp-filter-heading {
        font-size: var(--pp-font-size-sm);
        margin-bottom: var(--pp-space-2);
    }

    .pp-mobile-filters .pp-chip-group {
        display: flex;
        flex-wrap: wrap;
        gap: var(--pp-space-2);
    }

    .pp-mobile-filters .pp-chip {
        font-size: var(--pp-font-size-sm);
        padding: var(--pp-space-1) var(--pp-space-2);
    }

    .pp-mobile-filters .pp-token-input {
        flex-direction: column;
        gap: var(--pp-space-2);
    }

    .pp-mobile-filters .pp-token-input-field {
        width: 100%;
    }

    .pp-mobile-filters .pp-token-add {
        width: 100%;
    }

    .pp-mobile-filters .pp-multiselect-trigger {
        width: 100%;
    }

    .pp-mobile-filters .pp-filter-count {
        font-size: var(--pp-font-size-sm);
        padding: var(--pp-space-2);
        margin-top: var(--pp-space-2);
        border-top: 1px solid var(--pp-glass-border);
    }

    .pp-mobile-filters .pp-clear-filters {
        width: 100%;
        margin-top: var(--pp-space-2);
        padding: var(--pp-space-2);
        font-size: var(--pp-font-size-sm);
    }

    /* Hide filter toggle button since filters are always visible */
    .pp-mobile-sidebar-toggle {
        display: none;
    }

    .pp-search-bar {
        position: relative;
        top: auto;
        right: auto;
        width: 100%;
        margin-bottom: var(--pp-space-4);
    }

    .pp-fab-container {
        bottom: var(--pp-space-4);
        right: var(--pp-space-4);
    }

    /* Adjust layout for mobile */
    .pp-layout {
        flex-direction: column;
    }

    .pp-main-content {
        width: 100%;
        padding: var(--pp-space-3);
    }
}

/* ========================================
   PARTICLE BACKGROUND
   ======================================== */

.pp-particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
}

/* ========================================
   LOADING STATES
   ======================================== */

.pp-loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--pp-space-8);
    gap: var(--pp-space-4);
}

.pp-loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--pp-glass-border);
    border-top-color: var(--pp-accent-blue);
    border-radius: 50%;
    animation: pp-spin 1s linear infinite;
}

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

.pp-empty-state {
    text-align: center;
    padding: var(--pp-space-8);
    color: var(--pp-text-tertiary);
}

.pp-empty-state-icon {
    font-size: var(--pp-font-size-4xl);
    margin-bottom: var(--pp-space-4);
    opacity: 0.5;
}

/* ========================================
   SEARCH SUGGESTIONS
   ======================================== */

.pp-search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: var(--pp-space-1);
    background: var(--pp-bg-elevated);
    backdrop-filter: var(--pp-glass-blur);
    -webkit-backdrop-filter: var(--pp-glass-blur);
    border: 1px solid var(--pp-glass-border);
    border-radius: var(--pp-radius-md);
    max-height: 300px;
    overflow-y: auto;
    z-index: 10;
    display: none;
}

.pp-search-suggestions.open {
    display: block;
}

.pp-search-suggestion-item {
    padding: var(--pp-space-2) var(--pp-space-3);
    cursor: pointer;
    transition: all var(--pp-duration-fast) var(--pp-ease-out);
    display: flex;
    align-items: center;
    gap: var(--pp-space-2);
}

.pp-search-suggestion-item:hover {
    background: var(--pp-glass-bg-hover);
}

.pp-search-suggestion-item.history {
    opacity: 0.7;
    font-size: var(--pp-font-size-xs);
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

.pp-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;
}

.pp-focus-visible {
    outline: 2px solid var(--pp-accent-blue);
    outline-offset: 2px;
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */

@media (max-width: 768px) {
    .pp-layout {
        flex-direction: column;
    }

    .pp-main-content {
        padding: var(--pp-space-3);
    }

    .pp-paper-card {
        padding: var(--pp-space-3);
    }

    .pp-card-thumbnail {
        height: 150px;
    }
}