/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Professional Black & White with Blue Accents */
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --secondary: #64748B;
    --accent: #06B6D4;
    
    /* Neutral Colors */
    --black: #000000;
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Status Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #06B6D4;
    
    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --blur-intensity: blur(20px);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    min-height: 100vh;
    color: var(--gray-900);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Dynamic Island */
.dynamic-island {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: var(--blur-intensity);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 12px 24px;
    z-index: 1000;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.dynamic-island:hover {
    transform: translateX(-50%) scale(1.02);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.island-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.island-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 14px;
}

.island-text {
    display: flex;
    flex-direction: column;
}

.island-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-900);
}

.island-subtitle {
    font-size: 12px;
    color: var(--gray-500);
}

.island-controls {
    display: flex;
    gap: 8px;
}

.island-btn {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.island-btn:hover {
    background: var(--gray-200);
    color: var(--primary);
}

/* Main Container */
.container {
    display: flex;
    min-height: 100vh;
    padding: 80px 20px 20px 20px;
    gap: 20px;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-intensity);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--gray-200);
}

.sidebar-header {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.app-logo {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.sidebar-header h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
}

.app-subtitle {
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 16px 24px;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
    border-left-color: var(--gray-300);
}

.nav-item.active {
    background: var(--gray-50);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

.nav-item i {
    width: 20px;
    margin-right: 12px;
    font-size: 16px;
}

.nav-badge {
    background: var(--primary);
    color: var(--white);
    border-radius: 12px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    margin-left: auto;
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--gray-200);
}

.system-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-intensity);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--gray-200);
}

.tab-content {
    display: none;
    height: 100%;
    padding: 32px;
    overflow-y: auto;
}

.tab-content.active {
    display: block;
}

.content-header {
    margin-bottom: 32px;
}

.content-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--gray-900), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-header p {
    color: var(--gray-600);
    font-size: 16px;
    font-weight: 500;
}

/* Glass Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-intensity);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    padding: 24px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    gap: 16px;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
}

.card-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.card-description {
    color: var(--gray-500);
    font-size: 14px;
}

/* Input Cards */
.input-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: 12px;
    padding: 40px 24px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--gray-50);
}

.upload-area:hover {
    border-color: var(--primary);
    background: var(--gray-100);
}

.upload-icon {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 16px;
    opacity: 0.8;
}

.upload-text {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-800);
}

.upload-subtext {
    color: var(--gray-500);
    margin-bottom: 24px;
    font-size: 14px;
}

.file-info {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: 8px;
    font-size: 14px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--gray-200);
}

.file-info i {
    color: var(--primary);
}

.text-inputs-container {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 16px;
    background: var(--gray-50);
}

.result-text {
    width: 100%;
    height: 120px;
    padding: 16px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    resize: vertical;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    background: var(--white);
    transition: var(--transition);
    color: var(--gray-800);
}

.result-text:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.text-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.text-count {
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
}

/* Buttons */
.modern-btn {
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 10px;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.modern-btn:hover {
    background: var(--gray-50);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--gray-400);
}

.modern-btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-color: var(--primary);
}

.modern-btn.primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.modern-btn.secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.modern-btn.secondary:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.modern-btn.large {
    padding: 16px 28px;
    font-size: 16px;
}

.modern-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.action-bar {
    display: flex;
    gap: 16px;
    align-items: center;
}

/* Results Tab */
.results-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: center;
}

.search-box {
    position: relative;
    flex: 1;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
}

.search-box input {
    width: 100%;
    padding: 14px 16px 14px 48px;
    border: 1px solid var(--gray-300);
    border-radius: 10px;
    background: var(--white);
    font-size: 14px;
    transition: var(--transition);
    color: var(--gray-800);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filters {
    display: flex;
    gap: 12px;
}

.modern-select {
    padding: 14px 16px;
    border: 1px solid var(--gray-300);
    border-radius: 10px;
    background: var(--white);
    font-size: 14px;
    color: var(--gray-800);
    cursor: pointer;
    transition: var(--transition);
    min-width: 160px;
}

.modern-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.results-container {
    max-height: 500px;
    overflow-y: auto;
    margin-bottom: 24px;
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--gray-600);
}

/* Student Result Card */
.student-card {
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.student-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--gray-300);
}

.student-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.student-header:hover {
    background: var(--gray-100);
}

.student-name {
    font-weight: 600;
    font-size: 16px;
    color: var(--gray-900);
}

.student-meta {
    display: flex;
    gap: 20px;
    color: var(--gray-600);
    font-size: 14px;
}

.student-content {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-slow);
}

.student-card.expanded .student-content {
    padding: 24px;
    max-height: 1000px;
}

.student-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 6px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
}

.performance-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
}

.sgpa-display, .credits-display {
    flex: 1;
    text-align: center;
    padding: 24px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.sgpa-value, .credits-value {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.sgpa-label, .credits-label {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 500;
}

.subjects-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.subjects-table th,
.subjects-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.subjects-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.subjects-table tr:hover {
    background: var(--gray-50);
}

/* Analytics Section */
.analytics-section {
    margin-bottom: 32px;
}

.section-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gray-200);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
}

.stat-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    flex-shrink: 0;
}

.stat-icon.primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.stat-icon.success { background: linear-gradient(135deg, var(--success), #059669); }
.stat-icon.info { background: linear-gradient(135deg, var(--info), #0891B2); }
.stat-icon.danger { background: linear-gradient(135deg, var(--danger), #DC2626); }

.stat-content h3 {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.stat-change {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 500;
}

/* Performance Distribution */
.distribution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.distribution-card {
    text-align: center;
    padding: 24px 20px;
    transition: var(--transition);
}

.distribution-card:hover {
    transform: translateY(-4px);
}

.distribution-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}

.distribution-header i {
    font-size: 20px;
}

.distribution-header h4 {
    font-size: 16px;
    font-weight: 600;
}

.distribution-value {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 4px;
}

.distribution-label {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 8px;
    font-weight: 500;
}

.distribution-percentage {
    font-size: 18px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
}

/* Distribution Card Colors */
.distribution-card.excellent {
    border-left: 4px solid #10B981;
}
.distribution-card.excellent .distribution-value { color: #10B981; }
.distribution-card.excellent .distribution-percentage { background: #ECFDF5; color: #10B981; }

.distribution-card.very-good {
    border-left: 4px solid #3B82F6;
}
.distribution-card.very-good .distribution-value { color: #3B82F6; }
.distribution-card.very-good .distribution-percentage { background: #EFF6FF; color: #3B82F6; }

.distribution-card.good {
    border-left: 4px solid #8B5CF6;
}
.distribution-card.good .distribution-value { color: #8B5CF6; }
.distribution-card.good .distribution-percentage { background: #F5F3FF; color: #8B5CF6; }

.distribution-card.average {
    border-left: 4px solid #F59E0B;
}
.distribution-card.average .distribution-value { color: #F59E0B; }
.distribution-card.average .distribution-percentage { background: #FFFBEB; color: #F59E0B; }

.distribution-card.needs-improvement {
    border-left: 4px solid #EF4444;
}
.distribution-card.needs-improvement .distribution-value { color: #EF4444; }
.distribution-card.needs-improvement .distribution-percentage { background: #FEF2F2; color: #EF4444; }

.distribution-card.failed {
    border-left: 4px solid #6B7280;
}
.distribution-card.failed .distribution-value { color: #6B7280; }
.distribution-card.failed .distribution-percentage { background: #F3F4F6; color: #6B7280; }

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.chart-card {
    padding: 24px;
}

.chart-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 20px;
    text-align: center;
}

.chart-placeholder {
    height: 200px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 20px;
    padding: 20px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    height: 100%;
}

.chart-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    height: 100%;
}

.bar-fill {
    width: 30px;
    border-radius: 4px 4px 0 0;
    transition: height 1s ease-in-out;
    min-height: 4px;
}

.bar-fill.excellent { background: #10B981; }
.bar-fill.very-good { background: #3B82F6; }
.bar-fill.good { background: #8B5CF6; }
.bar-fill.average { background: #F59E0B; }
.bar-fill.needs-improvement { background: #EF4444; }
.bar-fill.failed { background: #6B7280; }

.bar-label {
    font-size: 12px;
    color: var(--gray-600);
    font-weight: 600;
}

.summary-stats {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--gray-50);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.summary-label {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

.summary-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

/* Export Cards */
.export-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.export-card {
    text-align: center;
    padding: 40px 32px;
}

.export-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--white);
    font-size: 32px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.export-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.export-card p {
    color: var(--gray-600);
    margin-bottom: 28px;
    line-height: 1.6;
}

/* Progress Overlay */
.progress-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.progress-modal {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--gray-200);
}

.progress-icon {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 20px;
}

.progress-modal h3 {
    margin-bottom: 12px;
    font-size: 20px;
    color: var(--gray-900);
}

.progress-modal p {
    color: var(--gray-600);
    margin-bottom: 24px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    width: 0%;
    transition: width 0.3s ease;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-top: 1px solid var(--gray-200);
}

.page-info {
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .input-cards {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1024px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        margin-bottom: 20px;
    }
    
    .distribution-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .dynamic-island {
        display: none;
    }
    
    .container {
        padding: 20px 10px;
    }
    
    .tab-content {
        padding: 20px;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .results-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .performance-stats {
        flex-direction: column;
    }
    
    .distribution-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .distribution-grid {
        grid-template-columns: 1fr;
    }
    
    .system-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Animation Keyframes */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

/* Utility Classes */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary), var(--accent)) 1;
}

.footer {
  background-color: #000000d5;
  color: #ffffff;
  text-align: center;
  padding: 20px 10px;
  font-family: 'Poppins', sans-serif;
  border-top: 2px solid #fff;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.footer a:hover {
  color: #ccc;
  text-decoration: underline;
}

.system-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.credits, .copyright {
  font-size: 14px;
  margin: 4px 0;
}