/* Base styles */
:root {
    /* Modern Color Palette */
    --primary: #4F46E5; /* Indigo 600 */
    --primary-light: #818CF8;
    --primary-dark: #4338CA;
    --secondary: #64748B; /* Slate 500 */
    --success: #10B981; /* Emerald 500 */
    --warning: #F59E0B; /* Amber 500 */
    --danger: #EF4444; /* Red 500 */
    --info: #3B82F6; /* Blue 500 */
    
    /* Neutral Colors */
    --background: #F8FAFC; /* Slate 50 */
    --card-bg: #FFFFFF;
    --text-primary: #1E293B; /* Slate 800 */
    --text-secondary: #64748B; /* Slate 500 */
    --border-color: #E2E8F0; /* Slate 200 */
    --hover-bg: #F1F5F9; /* Slate 100 */
    
    /* Shadows */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --hover-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    margin: 0;
    padding: 0;
}

.container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}

@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Common utility classes */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

.py-3 {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(10px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* Status Badges */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.bg-success, .completed, .leave-approved {
    background-color: var(--success);
    color: white;
}

.bg-warning, .ongoing, .leave-pending {
    background-color: var(--warning);
    color: white;
}

.bg-danger, .leave-rejected {
    background-color: var(--danger);
    color: white;
}

.bg-info, .upcoming {
    background-color: var(--info);
    color: white;
}

/* Form styles */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    font-size: 0.875rem;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    gap: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

/* Modern Card Styles */
.content-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

/* Print Styles */
@media print {
  .btn-primary,
  .modal,
  .modal-backdrop {
    display: none !important;
  }

  .content-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* Tables */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table th {
    background-color: var(--hover-bg);
    padding: 1rem;
    font-weight: 600;
    text-align: left;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.table tr:hover td {
    background-color: var(--hover-bg);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .container {
    padding-right: 12px;
    padding-left: 12px;
  }
  
  .content-card {
    padding: 1.25rem;
  }
}

@media (max-width: 992px) {
  .container {
    padding-right: 10px;
    padding-left: 10px;
  }
  
  .content-card {
    padding: 1rem;
  }
  
  .btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding-right: 8px;
    padding-left: 8px;
  }
  
  .content-card {
    padding: 0.875rem;
    margin-bottom: 1rem;
  }
  
  .form-control {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }
  
  .table th,
  .table td {
    padding: 0.75rem;
    font-size: 0.875rem;
  }
  
  .status-badge {
    padding: 0.2rem 0.5rem;
    font-size: 0.7rem;
  }
}

@media (max-width: 576px) {
  .container {
    padding-right: 6px;
    padding-left: 6px;
  }
  
  .content-card {
    padding: 0.75rem;
  }
  
  .btn {
    padding: 0.35rem 0.7rem;
    font-size: 0.75rem;
  }
  
  .form-control {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
  }
  
  .table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
  
  .table th,
  .table td {
    padding: 0.5rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 375px) {
  .container {
    padding-right: 4px;
    padding-left: 4px;
  }
  
  .content-card {
    padding: 0.625rem;
  }
  
  .btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.7rem;
  }
  
  .form-control {
    padding: 0.35rem 0.5rem;
    font-size: 0.7rem;
  }
  
  .table th,
  .table td {
    padding: 0.4rem;
    font-size: 0.75rem;
  }
  
  .status-badge {
    padding: 0.15rem 0.4rem;
    font-size: 0.65rem;
  }
}

@media (max-width: 320px) {
  .container {
    padding-right: 3px;
    padding-left: 3px;
  }
  
  .content-card {
    padding: 0.5rem;
  }
  
  .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.65rem;
  }
  
  .form-control {
    padding: 0.3rem 0.4rem;
    font-size: 0.65rem;
  }
  
  .table th,
  .table td {
    padding: 0.3rem;
    font-size: 0.7rem;
  }
  
  .status-badge {
    padding: 0.1rem 0.3rem;
    font-size: 0.6rem;
  }
}

/* Enhanced Responsive Styles */
/* Mobile-first approach for better performance */

/* Responsive layout containers */
.container {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* Responsive tables */
.table-responsive-sm {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Table adjustments for small screens */
@media (max-width: 576px) {
  .table th, 
  .table td {
    padding: 0.5rem 0.25rem;
    font-size: 0.75rem;
  }
  
  .table-responsive-sm {
    border: 0;
  }
}

/* Responsive form controls */
.form-control {
  width: 100%;
}

/* Responsive card adjustments */
@media (max-width: 576px) {
  .card {
    margin-bottom: 0.75rem;
  }
  
  .card-body {
    padding: 0.75rem;
  }
  
  .card-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
  }
}

/* Responsive spacing utilities */
@media (max-width: 576px) {
  .px-sm-1 { padding-left: 0.25rem !important; padding-right: 0.25rem !important; }
  .py-sm-1 { padding-top: 0.25rem !important; padding-bottom: 0.25rem !important; }
  .p-sm-1 { padding: 0.25rem !important; }
  .mx-sm-1 { margin-left: 0.25rem !important; margin-right: 0.25rem !important; }
  .my-sm-1 { margin-top: 0.25rem !important; margin-bottom: 0.25rem !important; }
  .m-sm-1 { margin: 0.25rem !important; }
}

/* Adjustments for modals on small screens */
@media (max-width: 576px) {
  .modal-dialog {
    margin: 0.5rem;
    max-width: calc(100% - 1rem);
  }
  
  .modal-body {
    padding: 0.75rem;
  }
  
  .modal-footer {
    padding: 0.5rem;
  }
  
  .modal-header {
    padding: 0.75rem;
  }
}

/* Responsive image sizing */
.img-fluid {
  max-width: 100%;
  height: auto;
}

/* Responsive flex utilities */
.d-sm-flex {
  display: flex !important;
}

@media (max-width: 576px) {
  .flex-sm-column {
    flex-direction: column !important;
  }
  
  .justify-content-sm-center {
    justify-content: center !important;
  }
  
  .align-items-sm-center {
    align-items: center !important;
  }
}

/* Enhanced responsive grid system */
.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

@media (max-width: 576px) {
  .row {
    margin-right: -10px;
    margin-left: -10px;
  }
  
  [class*="col-"] {
    padding-right: 10px;
    padding-left: 10px;
  }
}

/* Responsive utilities for text */
@media (max-width: 576px) {
  .text-sm-center {
    text-align: center !important;
  }
  
  .text-sm-left {
    text-align: left !important;
  }
  
  .text-sm-right {
    text-align: right !important;
  }
}

/* Print styles */
@media print {
  .no-print {
    display: none !important;
  }
  
  .container {
    width: 100% !important;
    max-width: none !important;
  }
  
  body {
    font-size: 12pt;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
  }
}