/* ===================================
   LOAN TRACKER - RESPONSIVE BOOTSTRAP THEME
   =================================== */

:root {
  --primary-color: #0d6efd;
  --success-color: #198754;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #0dcaf0;
  --dark-color: #212529;
  --light-color: #f8f9fa;
  --border-radius: 0.75rem;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

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

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

html, body {
  height: 100%;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--dark-color);
}

body {
  background-color: var(--light-color);
  overflow-x: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: #495057;
}

.fw-500 {
  font-weight: 500;
}

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

.login-body {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
}

.card {
  border: none;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.2) !important;
}

.form-control, .form-control-lg {
  border-radius: 0.5rem;
  border: 1px solid #dee2e6;
  padding: 0.75rem 1rem;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.form-control:focus, .form-control-lg:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-label {
  margin-bottom: 0.5rem;
  color: var(--dark-color);
  font-size: 0.95rem;
}

/* ===================================
   BUTTON STYLES
   =================================== */

.btn {
  border-radius: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 1.1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: #0b5ed7;
  border-color: #0a58ca;
  transform: translateY(-2px);
  box-shadow: 0 0.5rem 1rem rgba(13, 110, 253, 0.4);
}

.btn-success {
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.btn-success:hover {
  background-color: #157347;
  transform: translateY(-2px);
}

.btn-danger {
  background-color: var(--danger-color);
  border-color: var(--danger-color);
}

.btn-danger:hover {
  background-color: #bb2d3b;
  transform: translateY(-2px);
}

.btn-outline-secondary {
  color: var(--dark-color);
  border-color: #dee2e6;
}

.btn-outline-secondary:hover {
  background-color: #e9ecef;
  border-color: #dee2e6;
}

/* ===================================
   NAVBAR STYLES
   =================================== */

.navbar {
  box-shadow: var(--shadow-sm);
  background: linear-gradient(90deg, #0d6efd 0%, #0b5ed7 100%);
}

.navbar-brand {
  font-size: 1.5rem;
  margin-right: 2rem;
  transition: all 0.3s ease;
}

.navbar-brand:hover {
  color: #fff !important;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.nav-link {
  font-weight: 500;
  margin-left: 0.5rem;
  transition: all 0.3s ease;
  border-radius: 0.35rem;
  padding: 0.5rem 0.75rem !important;
}

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

/* ===================================
   CARD STYLES
   =================================== */

.card {
  border: none;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.card-header {
  background-color: var(--primary-color);
  color: white;
  border: none;
  font-weight: 600;
  padding: 1.25rem 1.5rem;
}

.card-body {
  padding: 1.5rem;
}

.card:hover {
  box-shadow: var(--shadow);
}

/* Summary Card Backgrounds */
.bg-success-light {
  background-color: rgba(25, 135, 84, 0.08) !important;
}

.bg-danger-light {
  background-color: rgba(220, 53, 69, 0.08) !important;
}

.bg-warning-light {
  background-color: rgba(255, 193, 7, 0.08) !important;
}

.bg-info-light {
  background-color: rgba(13, 202, 240, 0.08) !important;
}

/* ===================================
   TABLE STYLES
   =================================== */

.table {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.table thead {
  background-color: #f8f9fa;
}

.table thead th {
  border-bottom: 2px solid #dee2e6;
  font-weight: 600;
  padding: 1rem 0.75rem;
  color: var(--dark-color);
}

.table tbody tr {
  transition: all 0.3s ease;
  border-bottom: 1px solid #dee2e6;
}

.table tbody tr:hover {
  background-color: #f8f9fa;
}

.table tbody td {
  padding: 1rem 0.75rem;
  vertical-align: middle;
}

/* ===================================
   BADGES & ALERTS
   =================================== */

.badge {
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  border-radius: 0.35rem;
  font-size: 0.85rem;
}

.alert {
  border: none;
  border-radius: var(--border-radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.alert-danger {
  background-color: rgba(220, 53, 69, 0.1);
  color: #721c24;
  border-left: 4px solid var(--danger-color);
}

.alert-info {
  background-color: rgba(13, 202, 240, 0.1);
  color: #0c5460;
  border-left: 4px solid var(--info-color);
}

.alert-warning {
  background-color: rgba(255, 193, 7, 0.1);
  color: #856404;
  border-left: 4px solid var(--warning-color);
}

.alert-success {
  background-color: rgba(25, 135, 84, 0.1);
  color: #155724;
  border-left: 4px solid var(--success-color);
}

/* ===================================
   INPUT GROUP STYLES
   =================================== */

.input-group-text {
  background-color: #f8f9fa;
  border-color: #dee2e6;
  font-weight: 600;
  color: var(--primary-color);
}

.input-group-lg .input-group-text {
  padding: 0.875rem 1rem;
}

/* ===================================
   RESPONSIVE GRID UTILITIES
   =================================== */

.min-vh-100 {
  min-height: 100vh;
}

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

footer {
  background-color: white;
  border-top: 1px solid #dee2e6;
  margin-top: auto;
}

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

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 576px) {
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  .card-body {
    padding: 1rem;
  }
  
  .container-fluid {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  
  .table {
    font-size: 0.85rem;
  }
  
  .table thead th,
  .table tbody td {
    padding: 0.75rem 0.5rem;
  }
  
  .btn-lg {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }
  
  .navbar {
    padding: 0.5rem 0 !important;
  }
  
  .d-flex.align-items-center.justify-content-between {
    gap: 0.5rem;
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .container-fluid {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .container-fluid {
    padding-left: 3rem;
    padding-right: 3rem;
  }
}

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

.shadow-sm {
  box-shadow: var(--shadow-sm) !important;
}

.shadow {
  box-shadow: var(--shadow) !important;
}

.rounded-3 {
  border-radius: 1rem !important;
}

.text-muted {
  color: #6c757d !important;
}

.gap-2 {
  gap: 0.5rem !important;
}

.gap-3 {
  gap: 1rem !important;
}

/* ===================================
   FORM VALIDATION
   =================================== */

.was-validated .form-control:valid {
  border-color: var(--success-color);
}

.was-validated .form-control:valid:focus {
  border-color: var(--success-color);
  box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

.was-validated .form-control:invalid {
  border-color: var(--danger-color);
}

.was-validated .form-control:invalid:focus {
  border-color: var(--danger-color);
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

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

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

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

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

:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Screen reader only */
.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;
}