:root {
  --bg-color: #ffffff;
  --text-color: #111111;
  --primary-color: #0d6efd;
  --success-color: #28a745;
  --error-color: #dc3545;
  --toast-bg: #333;
  --card-bg: #ffffff;
  --card-text: #111111;
  /* Table colors now managed by Bootstrap classes via JS */
}

body.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --primary-color: #339af0;
  --success-color: #4caf50;
  --error-color: #ff6b6b;
  --toast-bg: #444;
  --card-bg: #1e1e1e;
  --card-text: #e0e0e0;
  background-color: var(--bg-color) !important; /* Dark Mode background */
  color: var(--text-color) !important;
}

html, body {
  min-height: 100vh; /* Ensures the body takes up at least the height of the viewport */
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
}

body {
  background-color: var(--bg-color); /* Light/Dark Mode background */
  display: flex;
  flex-direction: column;
}

main {
  flex: auto; /* Main content will grow and shrink as needed */
}

/* Scroll offset for fixed navbar */
.scroll-offset {
  scroll-margin-top: 80px; /* Adjust for fixed navbar height */
}

/* Card Styles */
.card,
.card.shadow,
.card.shadow-sm {
  background-color: var(--card-bg) !important;
  color: var(--card-text) !important;
  border: 1px solid rgba(0, 0, 0, 0.125) !important;
}

.card-title {
  text-align: center;
}

/* Modal Styles */
.modal-content {
  background-color: var(--card-bg) !important;
  color: var(--card-text) !important;
}

.modal-header,
.modal-body,
.modal-footer {
  background-color: var(--card-bg) !important;
  color: var(--card-text) !important;
  border-color: rgba(0, 0, 0, 0.125) !important;
}

/* Form Controls */
.form-control,
.form-select {
  background-color: var(--card-bg) !important;
  color: var(--text-color) !important;
  border: 1px solid rgba(0, 0, 0, 0.2) !important;
}

/* Buttons */
.btn-primary {
  background-color: var(--primary-color) !important;
  border-color: var(--primary-color) !important;
  color: var(--bg-color) !important;
}

.btn-primary:hover,
.btn-primary:focus {
  filter: brightness(110%);
}

.btn-close {
  filter: invert(0);
}

body.dark-mode .btn-close {
  filter: invert(1);
}

/* Feedback Toast */
.form-feedback-toast {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100vw;
  z-index: 9999;
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  color: #ffffff;
  background-color: var(--toast-bg);
  transform: translateY(100%);
  opacity: 0;
  transition: transform 0.4s ease-out, opacity 0.4s ease-out;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}

.form-feedback-toast.success {
  background-color: var(--success-color) !important;
}

.form-feedback-toast.error {
  background-color: var(--error-color) !important;
}

.form-feedback-toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Card Image Crop */
.card-img-top {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center;
  border-radius: 0.5rem 0.5rem 0 0;
}

/* Back to Top Button */
#btn-back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: none;
  z-index: 1050;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 22px;
}

.lightbox {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  z-index: 10000;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  flex-direction: column;
}

.lightbox.hidden {
  display: none;
}

.lightbox-img {
  max-width: 90%;
  max-height: 80%;
}

.lightbox-caption {
  font-size: 1rem;
}

.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  user-select: none;
}

.lightbox-close {
  top: 20px;
  right: 30px;
}

.lightbox-prev {
  top: 50%;
  left:30px;
  transform: translateY(-50%);
}

.lightbox-next {
  top: 50%;
  right: 30px;
  transform: translateY(-50%);
}