/* Enhanced CSS Variables */
:root {
    --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%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #38a169;
    --error-color: #e53e3e;
    --warning-color: #d69e2e;
    --info-color: #3182ce;
    
    --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;
    
    /* Table-specific colors for banded rows */
    --table-even-row: #f8fafc;
    --table-odd-row: #ffffff;
    --table-even-hover: #e2e8f0;
    --table-odd-hover: #f1f5f9;
    --table-border: #cbd5e0;
    --table-header-bg: #edf2f7;
    --table-frozen-even: #f1f5f9;
    --table-frozen-odd: #fafbfc;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    font-size: 14px;
}

/* Login Page Styles */
.login-body {
    background: var(--primary-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1 )" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.login-container {
    width: 100%;
    max-width: 420px;
    z-index: 1;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-2xl);
    padding: 50px;
    text-align: center;
    transform: translateY(0);
    transition: var(--transition);
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 35px 60px -12px rgba(0, 0, 0, 0.3);
}

.login-header h1 {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    font-size: 2.5rem;
    font-weight: 800;
}

.login-header p {
    color: var(--gray-600);
    margin-bottom: 30px;
    font-weight: 500;
}

.login-form .form-group {
    margin-bottom: 25px;
    text-align: left;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-700);
}

.login-form input {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 16px;
    background: var(--white);
    color: var(--gray-800);
    transition: var(--transition);
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.demo-credentials {
    margin-top: 30px;
    padding: 25px;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    text-align: left;
    border: 1px solid var(--gray-200);
}

.demo-credentials h4 {
    color: var(--gray-800);
    margin-bottom: 15px;
    font-weight: 700;
}

.demo-credentials p {
    margin: 8px 0;
    font-size: 14px;
    color: var(--gray-600);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border-left: 4px solid var(--error-color);
}

/* Dashboard Layout */
.dashboard-body {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
}

/* Navigation Bar */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--gray-200);
}

.navbar-brand {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav {
    display: flex;
    gap: 25px;
}

.navbar-nav a {
    color: var(--gray-600);
    text-decoration: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.navbar-nav a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: var(--transition);
    z-index: -1;
}

.navbar-nav a:hover::before {
    left: 0;
}

.navbar-nav a:hover {
    color: white;
    transform: translateY(-2px);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-user span {
    color: var(--gray-600);
    font-weight: 600;
    padding: 8px 16px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 25px;
}

.navbar-user a {
    color: var(--error-color);
    text-decoration: none;
    padding: 10px 18px;
    border-radius: 25px;
    transition: var(--transition);
    font-weight: 600;
    background: rgba(239, 68, 68, 0.1);
}

.navbar-user a:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    padding: 40px;
    max-width: 1800px;
    margin: 0 auto;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    font-weight: 800;
}

.page-subtitle {
    color: var(--gray-600);
    font-size: 1.2rem;
    font-weight: 500;
}

/* Enhanced Filters Section */
.filters-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.filters-header {
    background: var(--gray-50);
    padding: 20px 30px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filters-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
}

.export-btn {
    background: var(--success-gradient);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.filters-form {
    padding: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
}

.filter-group label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-input {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    background: var(--white);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    min-height: 44px;
    cursor: pointer;
}

.filter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.clear-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-200);
    color: var(--gray-700);
}

.clear-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--gray-300);
}

/* Alert Messages */
.alert {
    padding: 20px 25px;
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    font-weight: 600;
    border: 1px solid;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
    border-color: rgba(34, 197, 94, 0.2);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border-color: rgba(239, 68, 68, 0.2);
}

/* Enhanced Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 30px;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
}

.stat-icon {
    font-size: 3rem;
    opacity: 0.8;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-content h3 {
    color: var(--gray-600);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-800);
}

.stat-value.active {
    color: var(--success-color);
}

.stat-value.completed {
    color: var(--info-color);
}

.stat-value.delayed {
    color: var(--error-color);
}

.stat-value.positive {
    color: var(--success-color);
}

.stat-value.negative {
    color: var(--error-color);
}

/* Excel-like Table Styles with Enhanced Formatting */
.excel-table-container {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--gray-300);
    overflow: hidden;
    margin-bottom: 50px;
}

.table-header {
    background: var(--gray-50);
    padding: 25px 30px;
    border-bottom: 2px solid var(--gray-300);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.table-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
}

.table-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.zoom-btn, .reset-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    min-width: 50px;
}

.reset-btn {
    background: var(--secondary-gradient);
}

.zoom-level {
    font-weight: 700;
    color: var(--gray-700);
    min-width: 50px;
    text-align: center;
    padding: 8px 12px;
    background: var(--gray-100);
    border-radius: var(--border-radius);
    font-size: 14px;
}

.zoom-btn:hover, .reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.zoom-btn:active, .reset-btn:active {
    transform: translateY(0);
}

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

.excel-table-wrapper {
    overflow: auto;
    max-height: 70vh;
    position: relative;
    border: none;
}

.excel-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--white);
    min-width: 1600px;
    transition: transform 0.3s ease-in-out;
}

.excel-table thead {
    position: sticky;
    top: 0;
    z-index: 20;
}

/* Enhanced Table Headers */
.excel-table th {
    background: var(--table-header-bg);
    border: 2px solid var(--table-border);
    border-top: none;
    border-left: none;
    padding: 15px;
    text-align: left;
    font-weight: 700;
    color: var(--gray-700);
    white-space: nowrap;
    user-select: none;
    position: relative;
    min-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.excel-table th:first-child {
    border-left: 2px solid var(--table-border);
}

.excel-table th.freeze-column {
    position: sticky;
    left: 0;
    z-index: 21;
    background: #e2e8f0;
    box-shadow: 2px 0 4px rgba(0,0,0,0.1);
}

.excel-table th.freeze-column:first-child {
    min-width: 80px;
    text-align: center;
}

.excel-table th.freeze-column:nth-child(2) {
    min-width: 180px;
}

.excel-table th.sortable {
    cursor: pointer;
    transition: var(--transition);
}

.excel-table th.sortable:hover {
    background: #d1d5db;
}

.th-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.sort-indicator {
    font-size: 12px;
    opacity: 0.6;
    transition: var(--transition);
}

/* Enhanced Table Cells with Strict No-Wrap and Banded Rows */
.excel-table td {
    border: 2px solid var(--table-border);
    border-top: none;
    border-left: none;
    padding: 15px;
    vertical-align: middle;
    transition: var(--transition);
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    min-width: 160px;
    max-width: 300px;
}

.excel-table td:first-child {
    border-left: 2px solid var(--table-border);
}

.excel-table td.freeze-column {
    position: sticky;
    left: 0;
    z-index: 10;
    box-shadow: 2px 0 4px rgba(0,0,0,0.05);
}

.excel-table td.freeze-column:first-child {
    text-align: center;
    font-weight: 600;
    min-width: 80px;
    max-width: 80px;
}

.excel-table td.freeze-column:nth-child(2) {
    min-width: 180px;
    max-width: 180px;
}

/* Robust Banded Rows Implementation */
.excel-table tbody tr:nth-child(even) td {
    background-color: var(--table-even-row);
}

.excel-table tbody tr:nth-child(odd) td {
    background-color: var(--table-odd-row);
}

.excel-table tbody tr:hover td {
    background-color: var(--table-even-hover);
}

.excel-table tbody tr:nth-child(odd):hover td {
    background-color: var(--table-odd-hover);
}

.excel-table tbody tr:nth-child(even) td.freeze-column {
    background-color: var(--table-frozen-even);
}

.excel-table tbody tr:nth-child(odd) td.freeze-column {
    background-color: var(--table-frozen-odd);
}

.excel-table tbody tr:hover td.freeze-column {
    background-color: var(--table-even-hover);
}

.excel-table tbody tr:nth-child(odd):hover td.freeze-column {
    background-color: var(--table-odd-hover);
}

/* Specific Cell Styles */
.excel-table .number-cell {
    text-align: right;
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.excel-table .progress-cell {
    text-align: center;
    font-weight: 600;
}

.excel-table .variance-cell {
    text-align: center;
    font-weight: 700;
}

.excel-table .variance-cell.positive {
    color: var(--success-color);
}

.excel-table .variance-cell.negative {
    color: var(--error-color);
}

/* Status Badges */
.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
    min-width: 80px;
    text-align: center;
    white-space: nowrap;
}

.status-active {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
    border: 1px solid #10b981;
}

.status-completed {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: #1e40af;
    border: 1px solid #3b82f6;
}

.status-delayed {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    color: #991b1b;
    border: 1px solid #ef4444;
}

.status-on-hold {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    border: 1px solid #fbbf24;
}

/* Form Styles (Admin & User Panel) */
.form-container {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 30px;
    margin-bottom: 40px;
    border: 1px solid var(--gray-200);
}

.form-container h2 {
    font-size: 1.8rem;
    color: var(--gray-800);
    margin-bottom: 25px;
    font-weight: 700;
    text-align: center;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    font-size: 13px;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    background: var(--gray-50);
    font-size: 14px;
    color: var(--gray-800);
    transition: var(--transition);
    width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: var(--white);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 5px;
}

.submit-btn, .btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
    width: auto;
    display: inline-block;
    margin-top: 20px;
}

.submit-btn:hover, .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.cancel-btn {
    background: var(--gray-300);
    color: var(--gray-800);
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
    width: auto;
    display: inline-block;
    margin-top: 20px;
    margin-left: 15px;
    text-decoration: none;
}

.cancel-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: var(--gray-400);
}

/* Admin Panel Specific Styles */
.tab-navigation {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    background: var(--gray-100);
    border-radius: var(--border-radius-lg);
    padding: 10px;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    flex: 1;
    text-align: center;
}

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

.tab-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.tab-content {
    display: none;
}

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

.list-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 30px;
    border: 1px solid var(--gray-200);
}

.list-section h2 {
    font-size: 1.8rem;
    color: var(--gray-800);
    margin-bottom: 25px;
    font-weight: 700;
    text-align: center;
}

.actions-cell {
    white-space: nowrap;
}

.edit-btn, .delete-btn {
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    margin-right: 8px;
    transition: var(--transition);
}

.edit-btn {
    background: var(--info-color);
    color: white;
}

.edit-btn:hover {
    background: #2b6cb0;
    transform: translateY(-1px);
}

.delete-btn {
    background: var(--error-color);
    color: white;
    border: none;
    cursor: pointer;
}

.delete-btn:hover {
    background: #c53030;
    transform: translateY(-1px);
}

/* Column Settings */
.column-settings {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 40px;
    border: 1px solid #e5e7eb;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.settings-header h2 {
    font-size: 1.8rem;
    color: var(--gray-800);
    font-weight: 700;
    margin: 0;
}

.save-settings-btn {
    background: var(--success-gradient);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.save-settings-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.column-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}

.column-item {
    display: flex;
    align-items: center;
    background: var(--gray-50);
    padding: 12px 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.column-item:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

.column-item input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
    cursor: pointer;
}

.column-item label {
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
}

/* Table Zoom Controls */
.table-controls {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 10px 0;
}

.zoom-control {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--gray-100);
    padding: 8px 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
}

.zoom-control label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 13px;
}

#zoom-slider {
    width: 150px;
    -webkit-appearance: none;
    height: 8px;
    background: var(--gray-300);
    border-radius: 5px;
    outline: none;
    opacity: 0.7;
    transition: opacity .2s;
}

#zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

#zoom-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

#zoom-value {
    font-weight: 700;
    color: var(--primary-color);
    min-width: 45px;
    text-align: right;
}

/* Table Sorting Icons */
.sort-icon {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 5px;
    vertical-align: middle;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--gray-500);
    opacity: 0.6;
}

.excel-table th.asc .sort-icon {
    border-top: none;
    border-bottom: 4px solid var(--primary-color);
    opacity: 1;
}

.excel-table th.desc .sort-icon {
    border-bottom: none;
    border-top: 4px solid var(--primary-color);
    opacity: 1;
}

/* Responsive Adjustments */
@media (max-width: 1200px) {
    .main-content {
        padding: 20px;
    }
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    .filters-form {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 20px;
    }
    .excel-table th, .excel-table td {
        padding: 12px;
        min-width: 120px;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }
    .navbar-nav {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .navbar-user {
        margin-top: 15px;
    }
    .page-title {
        font-size: 2.5rem;
    }
    .page-subtitle {
        font-size: 1rem;
    }
    .filters-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .filters-form {
        grid-template-columns: 1fr;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .login-card {
        padding: 30px;
    }
    .excel-table-container {
        border-radius: 8px;
    }
    .excel-table th, .excel-table td {
        font-size: 12px;
        padding: 10px;
    }
    .tab-navigation {
        flex-direction: column;
    }
    .tab-btn {
        width: 100%;
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 20px;
    }
    .login-header h1 {
        font-size: 2rem;
    }
    .demo-credentials {
        padding: 15px;
    }
    .navbar-brand {
        font-size: 1.5rem;
    }
    .navbar-nav a {
        padding: 8px 15px;
    }
    .stat-card {
        padding: 20px;
        flex-direction: column;
        text-align: center;
    }
    .stat-icon {
        margin-bottom: 10px;
    }
    .stat-content h3 {
        font-size: 0.8rem;
    }
    .stat-value {
        font-size: 2rem;
    }
    .form-container h2, .list-section h2 {
        font-size: 1.5rem;
    }
    .submit-btn, .cancel-btn, .btn-primary {
        width: 100%;
        margin-left: 0;
    }
}