/* ============================================
   INVOICE AI EXTRACTOR - ADVANCED MODERN UI
   ============================================ */

/* CSS Variables for consistent theming */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #434343 0%, #000000 100%);
    
    /* Solid Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f5576c;
    --success-color: #00f2fe;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    
    /* Neutral Colors */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --border-color: #e2e8f0;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

* {
    box-sizing: border-box;
}

body {
    background: var(--bg-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

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

.navbar {
    background: var(--primary-gradient) !important;
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md) 0;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-brand i {
    font-size: 1.6rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.navbar-brand:hover {
    transform: translateY(-2px);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md) !important;
    margin: 0 var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    transform: translateX(-50%);
    transition: var(--transition-base);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white !important;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    overflow: hidden;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: none;
    padding: var(--spacing-lg);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.card-header::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -100px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    transform: translateY(-50%);
}

.card-header h5,
.card-header h6 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.card-body {
    padding: var(--spacing-lg);
}

/* Metric Cards */
.card.text-white {
    border: none;
    position: relative;
    overflow: hidden;
}

.card.bg-primary {
    background: var(--primary-gradient) !important;
}

.card.bg-success {
    background: var(--success-gradient) !important;
}

.card.bg-info {
    background: linear-gradient(135deg, #667eea 0%, #4facfe 100%) !important;
}

.card.bg-warning {
    background: linear-gradient(135deg, #f093fb 0%, #ffc107 100%) !important;
}

.card.bg-danger {
    background: var(--secondary-gradient) !important;
}

.card.text-white::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.card.text-white .card-body {
    position: relative;
    z-index: 1;
}

.card.text-white .display-4 {
    opacity: 0.8;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    border-radius: var(--radius-md);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-gradient);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-success {
    background: var(--success-gradient);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.6);
}

.btn-info {
    background: linear-gradient(135deg, #667eea 0%, #4facfe 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #ffc107 100%);
    box-shadow: 0 4px 15px rgba(255, 193, 7, 0.4);
    color: var(--text-primary);
}

.btn-danger {
    background: var(--secondary-gradient);
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

.btn-outline-secondary,
.btn-outline-success,
.btn-outline-info,
.btn-outline-danger {
    border-width: 2px;
    background: transparent;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

/* ============================================
   TABLES
   ============================================ */

.table-responsive {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table {
    margin: 0;
}

.table thead th {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    padding: var(--spacing-md);
}

.table tbody tr {
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
    transform: scale(1.01);
}

.table tbody td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

.table-striped tbody tr:nth-of-type(odd) {
    background: rgba(248, 249, 250, 0.5);
}

/* ============================================
   FORMS
   ============================================ */

.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition-base);
    background: var(--bg-secondary);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    background: white;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition-base);
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

/* File Input Special Styling */
#fileInput {
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.02) 0%, rgba(118, 75, 162, 0.02) 100%);
    cursor: pointer;
    transition: var(--transition-base);
}

#fileInput:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    transform: scale(1.02);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.badge.bg-primary {
    background: var(--primary-gradient) !important;
}

.badge.bg-success {
    background: var(--success-gradient) !important;
}

.badge.bg-info {
    background: linear-gradient(135deg, #667eea 0%, #4facfe 100%) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, #f093fb 0%, #ffc107 100%) !important;
}

.badge.bg-danger {
    background: var(--secondary-gradient) !important;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border-left: 4px solid;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-success {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border-left-color: var(--success-color);
    color: #0c5460;
}

.alert-danger {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    border-left-color: var(--accent-color);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    border-left-color: var(--warning-color);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-left-color: var(--primary-color);
    color: #31539b;
    font-weight: 600;
}

/* Enhanced Alert Info for Login Page */
.alert-info strong {
    color: var(--primary-color);
    font-weight: 700;
}

.alert-info .badge {
    background: var(--success-gradient) !important;
    color: white;
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    box-shadow: 0 2px 8px rgba(79, 172, 254, 0.4);
}

/* ============================================
   MODALS
   ============================================ */

.modal-content {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: var(--spacing-lg);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-primary);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    gap: var(--spacing-sm);
}

.page-item .page-link {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--primary-color);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-base);
    margin: 0;
}

.page-item.active .page-link {
    background: var(--primary-gradient);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.page-item .page-link:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    transform: translateY(-2px);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    border-top: 4px solid;
    border-image: var(--primary-gradient) 1;
}

footer p {
    margin: 0;
}

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

.spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
    border-color: var(--primary-color);
    border-right-color: transparent;
}

/* ============================================
   PROGRESS BARS
   ============================================ */

.progress {
    height: 8px;
    border-radius: var(--radius-md);
    background: var(--border-color);
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-gradient);
    transition: width 0.6s ease;
}

/* ============================================
   HSN AUTOCOMPLETE
   ============================================ */

.hsn-suggestions {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: white;
    max-height: 250px;
    overflow-y: auto;
}

.hsn-suggestion-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.hsn-suggestion-item:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    transform: translateX(5px);
}

.hsn-suggestion-code {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.hsn-suggestion-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
}

.hsn-suggestion-gst {
    color: var(--success-color);
    font-weight: 600;
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

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

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4393 100%);
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

.card,
.alert,
.btn {
    animation: fadeIn 0.5s ease-out;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .card.text-white .card-text {
        font-size: 1.5rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hover-lift {
    transition: var(--transition-base);
}

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

.text-glow {
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

/* ============================================
   LOGIN PAGE SPECIFIC STYLES
   ============================================ */

/* Year and User Info Styling */
.card-body .alert-info {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(79, 172, 254, 0.15) 100%);
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.card-body .alert-info i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.card-body .alert-info strong {
    color: var(--primary-color);
    font-size: 1.05rem;
}

/* Year Number Styling */
.card-body .alert-info strong:last-of-type {
    color: #31539b;
    font-size: 1.1rem;
    font-weight: 800;
}

/* Username Badge in Alert */
.badge.bg-success {
    background: var(--success-gradient) !important;
    color: white !important;
    padding: 0.4rem 0.9rem;
    font-size: 0.95rem;
    font-weight: 700;
    box-shadow: 0 3px 10px rgba(79, 172, 254, 0.4);
    border: none;
}

/* Login Card Enhancement */
.card .card-header.bg-primary {
    background: var(--primary-gradient) !important;
    color: white;
}

/* Login Form Labels */
.form-label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

/* ============================================
   INVOICE SPECIFIC STYLES
   ============================================ */

.invoice-header {
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.invoice-header::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
}

.total-badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.invoice-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Match Status Colors */
.match-full {
    background: linear-gradient(90deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%) !important;
    border-left: 4px solid var(--success-color) !important;
}

.match-partial {
    background: linear-gradient(90deg, rgba(255, 193, 7, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%) !important;
    border-left: 4px solid var(--warning-color) !important;
}

.no-match {
    background: linear-gradient(90deg, rgba(245, 87, 108, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%) !important;
    border-left: 4px solid var(--accent-color) !important;
}