/*==================================================================
  1. Global Styles & Variables
==================================================================*/
:root {
  --primary-color: #6a11cb;
  --secondary-color: #2575fc;
  --background-color: #f4f7fc;
  --surface-color: #ffffff;
  --text-color: #333333;
  --text-secondary-color: #6c757d;
  --accent-color: #ff7e5f;
  --danger-color: #dc3545;
  --success-color: #28a745;
  --border-color: #dee2e6;
  --shadow-light: rgba(0, 0, 0, 0.08);
  --shadow-medium: rgba(0, 0, 0, 0.12);
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --border-radius: 12px;
  --transition-speed: 0.3s;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  overscroll-behavior-y: contain;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: var(--primary-color);
}

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
}

/*==================================================================
  2. Main Layout & Container
==================================================================*/
.container {
  max-width: 100%;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--surface-color);
}

#main-page {
  display: none; /* Initially hidden, shown by JS */
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.content-area {
  flex: 1;
  position: relative;
  overflow-y: auto;
}

.content-slide {
  display: none;
  height: 100%;
  overflow-y: auto;
}

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

/*==================================================================
  3. Login Page
==================================================================*/
#login-page {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 20px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.login-title {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 2rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.login-form {
  background: var(--surface-color);
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px var(--shadow-medium);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.input-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.input-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary-color);
  margin-bottom: 0.5rem;
}

.input-group input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.2);
}

.login-btn {
  width: 100%;
  padding: 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.error-message {
  display: none; /* Initially hidden */
  color: var(--danger-color);
  margin-top: 1rem;
  font-weight: 500;
}

@keyframes shake {
  10%, 90% { transform: translate3d(-1px, 0, 0); }
  20%, 80% { transform: translate3d(2px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
  40%, 60% { transform: translate3d(4px, 0, 0); }
}

/*==================================================================
  4. Bottom Navbar
==================================================================*/
.bottom-navbar {
  display: flex;
  background-color: var(--surface-color);
  box-shadow: 0 -2px 10px var(--shadow-light);
  border-top: 1px solid var(--border-color);
  z-index: 100;
}

.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  gap: 4px;
  color: var(--text-secondary-color);
  transition: color var(--transition-speed);
}

.nav-btn i {
  font-size: 1.5rem;
  font-style: normal;
}

.nav-btn span {
  font-size: 0.75rem;
  font-weight: 500;
}

.nav-btn.active {
  color: var(--primary-color);
}

/*==================================================================
  5. Message/Order Slide
==================================================================*/
.slide-title {
  padding: 20px 16px;
  font-size: 1.8rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-color);
}

.slide-subtitle {
  padding: 10px 16px 5px;
  font-size: 0.9rem;
  color: var(--text-secondary-color);
  font-weight: 600;
  text-transform: uppercase;
}

/* Note: .message-item styles are injected via JS, but can be customized here if needed */
.message-detail {
  display: none; /* Hidden by default */
  flex-direction: column;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--surface-color);
  z-index: 10;
  animation: slideIn 0.3s forwards;
}

.message-detail.active {
  display: flex;
}

.message-header {
  display: flex;
  align-items: center;
  padding: 16px;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.message-back {
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
  color: var(--text-secondary-color);
  padding: 0 8px;
}

.message-detail-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
}

.message-detail-sender {
  font-size: 1.2rem;
  font-weight: 600;
}

.message-body {
  flex: 1;
  padding: 20px;
  line-height: 1.6;
  font-size: 1rem;
  overflow-y: auto;
}

.message-body p {
  margin-bottom: 10px;
}

.message-date {
  padding: 0 20px 20px;
  font-size: 0.8rem;
  color: var(--text-secondary-color);
  text-align: right;
}

@keyframes slideIn {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

/*==================================================================
  6. Shop/Edit Slide
==================================================================*/
.shop-content {
    background-color: var(--background-color);
}

.shop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--surface-color);
  box-shadow: 0 2px 4px var(--shadow-light);
  position: sticky;
  top: 0;
  z-index: 50;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-color);
}

.shop-navbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.shop-nav-links {
  display: none; /* Hidden on mobile */
}

.shop-nav-links a {
  color: var(--text-secondary-color);
  font-weight: 500;
  transition: color var(--transition-speed);
}

.shop-nav-links a:hover {
  color: var(--primary-color);
}

.shop-nav-icons span {
  font-size: 1.5rem;
  cursor: pointer;
}

#menuToggle {
  display: inline; /* Visible on mobile */
}

/*--- Product List & Cards ---*/
.shop-category {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.category-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10px 10px;
}
.category-actions {
    display: flex;
    gap: 8px;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  padding: 1rem;
}

.product-card {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px var(--shadow-light);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px var(--shadow-medium);
}

.product-image {
  position: relative;
  aspect-ratio: 1 / 1;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-image-upload {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-speed);
}
.product-card:hover .product-image-upload {
    opacity: 1;
}

.product-info {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 0.5rem;
}

.product-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.3;
}

.price-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}
.shop-price {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
}
.shop-icon-btn {
    font-size: 1rem;
    color: var(--text-secondary-color);
}
.shop-icon-btn[title="Delete Product"], .shop-icon-btn[title="Delete Category"] {
    color: var(--danger-color);
}

.shop-quantity {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.shop-quantity input {
  width: 50px;
  text-align: center;
  border: 1px solid var(--border-color);
  font-size: 1rem;
  padding: 5px;
  margin: 0 5px;
  border-radius: 4px;
}
.shop-quantity input::-webkit-outer-spin-button,
.shop-quantity input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.shop-quantity input[type=number] {
  -moz-appearance: textfield;
}

.qty-minus, .qty-plus {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--text-secondary-color);
}

.shop-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
}

.shop-actions button {
  padding: 10px;
  border-radius: 8px;
  font-weight: 600;
  transition: background-color var(--transition-speed);
}

.shop-actions .add {
  background-color: var(--primary-color);
  color: #fff;
}

.shop-actions .buy {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}


/*--- Side Menus & Overlay ---*/
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-speed), visibility var(--transition-speed);
}
.overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu, .cart-menu {
  position: fixed;
  top: 0;
  height: 100%;
  background: var(--surface-color);
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
  z-index: 200;
  width: 280px;
  max-width: 80%;
  padding: 1rem;
  transition: transform var(--transition-speed) ease-in-out;
}

.mobile-menu {
  left: 0;
  transform: translateX(-100%);
}

.cart-menu {
  right: 0;
  transform: translateX(100%);
  display: flex;
  flex-direction: column;
}

.mobile-menu.active, .cart-menu.active {
  transform: translateX(0);
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 1.5rem;
  color: var(--text-secondary-color);
}
.cart-menu h2 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.cart-items {
    flex-grow: 1;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}
.cart-item-name {
    font-weight: 600;
}
.cart-item-price {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
}
.cart-item-quantity button {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
}
.cart-item-remove {
    color: var(--danger-color);
    font-size: 1.2rem;
    font-weight: bold;
}
.empty-cart-msg {
    text-align: center;
    color: var(--text-secondary-color);
    padding: 2rem 0;
}
.cart-total {
    border-top: 2px solid var(--text-color);
    padding-top: 1rem;
    margin-top: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
}
.checkout-btn {
    width: 100%;
    padding: 12px;
    margin-top: 1rem;
    border-radius: 8px;
    background-color: var(--success-color);
    color: #fff;
    font-size: 1.1rem;
}

/*--- Footer ---*/
.shop-footer {
  background: #343a40;
  color: #f8f9fa;
  padding: 2rem 1rem;
}

/*==================================================================
  7. Modals
==================================================================*/
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--surface-color);
  margin: auto;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  width: 90%;
  max-width: 500px;
  animation: modal-fade-in 0.3s;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 1.25rem;
}

.modal-close {
  color: var(--text-secondary-color);
  font-size: 1.75rem;
  font-weight: bold;
  cursor: pointer;
  background: none;
  border: none;
}

.image-preview {
  width: 100%;
  height: 150px;
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--text-secondary-color);
  overflow: hidden;
}
.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-input-group {
    margin-bottom: 15px;
}
.modal-input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}
.modal-input-group input[type="text"],
.modal-input-group input[type="number"],
.modal-input-group input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.modal-input-group input[type="file"] {
    padding: 5px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.modal-btn {
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
}

.modal-btn-primary {
  background-color: var(--primary-color);
  color: white;
}
.modal-btn-secondary {
  background-color: var(--border-color);
  color: var(--text-color);
}

@keyframes modal-fade-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}


/*==================================================================
  8. Responsive Design
==================================================================*/
@media (min-width: 768px) {
  .shop-nav-links {
    display: flex;
    gap: 1.5rem;
  }
  #menuToggle {
    display: none;
  }
}

@media (max-width: 480px) {
  .product-list {
    grid-template-columns: 1fr;
  }
  .login-title {
      font-size: 1.5rem;
  }
  .login-form {
      padding: 1.5rem;
  }
}


/*==================================================================
  9. New UI Components (Modals, Snackbar, In-place Editor)
==================================================================*/

/* --- Custom Danger Button for Confirmation Modal --- */
.modal-btn-danger {
  background-color: var(--danger-color);
  color: white;
}

/* --- Snackbar Notification --- */
#snackbar {
  visibility: hidden;
  min-width: 250px;
  margin-left: -125px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 8px;
  padding: 16px;
  position: fixed;
  z-index: 2000;
  left: 50%;
  bottom: 30px;
  font-size: 1rem;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

#snackbar.show {
  visibility: visible;
  -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
  animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

#snackbar.success {
  background-color: var(--success-color);
}
#snackbar.error {
  background-color: var(--danger-color);
}

@-webkit-keyframes fadein {
  from {bottom: 0; opacity: 0;} 
  to {bottom: 30px; opacity: 1;}
}

@keyframes fadein {
  from {bottom: 0; opacity: 0;}
  to {bottom: 30px; opacity: 1;}
}

@-webkit-keyframes fadeout {
  from {bottom: 30px; opacity: 1;} 
  to {bottom: 0; opacity: 0;}
}

@keyframes fadeout {
  from {bottom: 30px; opacity: 1;}
  to {bottom: 0; opacity: 0;}
}

/* --- In-place Editor --- */
.inline-editor {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 0;
}
.inline-editor input {
    flex-grow: 1;
    padding: 8px;
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    font-size: inherit; /* Inherit font size from context */
}
.inline-editor-actions button {
    font-size: 1.2rem;
    padding: 5px;
}
.inline-editor-actions .save {
    color: var(--success-color);
}
.inline-editor-actions .cancel {
    color: var(--danger-color);
}