/* Base Styles and Variables */
:root {
  --color-primary: #2196F3;
  --color-success: #4CAF50;
  --color-warning: #FFC107;
  --color-danger: #F44336;
  --color-accent: #9C27B0;
  
  --color-bg-light: #f8f9fa;
  --color-text-light: #212529;
  --color-border-light: #dee2e600;
  --color-card-light: #ffffff;
  
  --color-bg-dark: #121212;
  --color-text-dark: #e9ecef;
  --color-border-dark: #343a4000;
  --color-card-dark: #1e1e1e;
  
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --border-radius: 8px;
  --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* Theme Variables */
.light-theme {
  --color-bg: var(--color-bg-light);
  --color-text: var(--color-text-light);
  --color-border: var(--color-border-light);
  --color-card: var(--color-card-light);
  --color-input-bg: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.1);
}

.dark-theme {
  --color-bg: var(--color-bg-dark);
  --color-text: var(--color-text-dark);
  --color-border: var(--color-border-dark);
  --color-card: var(--color-card-dark);
  --color-input-bg: #2c2c2c;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 0.5rem;
  font-weight: 600;
  line-height: 1.2;
}

/* Header */
.header {
  background-color: var(--color-primary);
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 5px var(--color-shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__title {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0;
}

.header__title-plus {
  color: var(--color-success);
}

.header__controls {
  display: flex;
  gap: 0.5rem;
}

/* Main Content */
.main {
  flex: 1;
  padding: 1.5rem 0;
}

/* Dashboard */
.dashboard {
  margin-bottom: 2rem;
}

.dashboard__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  border-top: 4px solid var(--color-primary);
}

.stat-card--expired {
  border-color: var(--color-danger);
}

.stat-card--warning {
  border-color: var(--color-warning);
}

.stat-card--valid {
  border-color: var(--color-success);
}

.stat-card__number {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.stat-card__label {
  font-size: 0.9rem;
  color: var(--color-text);
  opacity: 0.8;
}

.dashboard__actions {
  display: flex;
  justify-content: flex-end;
}

/* Filters */
.filters {
  margin-bottom: 1.5rem;
}

.search-bar {
  position: relative;
  margin-bottom: 1rem;
}

.search-bar__input {
  width: 100%;
  padding: 0.75rem 3rem 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-input-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition);
}

.search-bar__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

.search-bar__button {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text);
  opacity: 0.6;
  cursor: pointer;
}

.filter-tabs {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.filter-tab {
  padding: 0.5rem 1rem;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.filter-tab:hover {
  background-color: rgba(33, 150, 243, 0.1);
}

.filter-tab--active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.category-filter {
  margin-bottom: 1rem;
}

.category-filter__select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-input-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
}

/* Products List */
.products__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px var(--color-shadow);
}

.product-card--expired {
  border-left: 4px solid var(--color-danger);
}

.product-card--warning {
  border-left: 4px solid var(--color-warning);
}

.product-card--valid {
  border-left: 4px solid var(--color-success);
}

.product-card__image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background-color: #f0f0f0;
}

.product-card__content {
  padding: 1rem;
}

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

.product-card__title {
  font-size: 1.1rem;
  margin: 0;
  font-weight: 600;
}

.product-card__status {
  display: flex;
  align-items: center;
  font-size: 0.8rem;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
}

.product-card__status--expired {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--color-danger);
}

.product-card__status--warning {
  background-color: rgba(255, 193, 7, 0.1);
  color: var(--color-warning);
}

.product-card__status--valid {
  background-color: rgba(76, 175, 80, 0.1);
  color: var(--color-success);
}

.product-card__details {
  margin-bottom: 1rem;
}

.product-card__detail {
  display: flex;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.product-card__detail-icon {
  margin-right: 0.5rem;
  font-size: 1.1rem;
  opacity: 0.7;
}

.product-card__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text);
  opacity: 0.7;
}

.empty-state__icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.empty-state__title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.empty-state__text {
  font-size: 1rem;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal__content {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
  transform: translateY(20px);
  transition: transform 0.3s;
}

.modal.active .modal__content {
  transform: translateY(0);
}

.modal__content--small {
  max-width: 400px;
}

.modal__header {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal__title {
  margin: 0;
  font-size: 1.25rem;
}

.modal__close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  opacity: 0.7;
  transition: opacity 0.2s;
}

.modal__close:hover {
  opacity: 1;
}

.modal__body {
  padding: 1rem;
}

/* Forms */
.product-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.product-form__photo {
  text-align: center;
  margin-bottom: 1rem;
}

.photo-preview {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background-color: var(--color-bg);
  border: 2px dashed var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin: 0 auto;
  overflow: hidden;
  transition: var(--transition);
}

.photo-preview:hover {
  border-color: var(--color-primary);
}

.photo-preview__icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
  opacity: 0.6;
}

.photo-preview__text {
  font-size: 0.9rem;
  color: var(--color-text);
  opacity: 0.6;
}

.photo-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-input {
  display: none;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-input-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.2);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

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

.btn--primary:hover {
  background-color: #1976D2;
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

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

.btn--danger:hover {
  background-color: #D32F2F;
}

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

.btn--success:hover {
  background-color: #388E3C;
}

.btn--warning {
  background-color: var(--color-warning);
  color: #212529;
}

.btn--warning:hover {
  background-color: #FFA000;
}

.btn--icon {
  padding: 0.5rem;
  font-size: 1.5rem;
  line-height: 1;
  border-radius: 50%;
  background-color: transparent;
  color: white;
}

.btn--icon-small {
  padding: 0.3rem;
  font-size: 1.2rem;
}

.btn--round {
  border-radius: 50%;
  width: 56px;
  height: 56px;
  padding: 0;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
  background-color: var(--color-card);
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer__text {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text);
  opacity: 0.8;
}

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

.footer__text a:hover {
  text-decoration: underline;
}

/* Utilities */
.hidden {
  display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
  .dashboard__stats {
    grid-template-columns: 1fr;
  }
  
  .products__list {
    grid-template-columns: 1fr;
  }
  
  .filter-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
  }
  
  .modal__content {
    width: 95%;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .products__list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.slide-up {
  animation: slideUp 0.3s ease-in-out;
}

/* Accessibility */
.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;
}

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

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.status-badge--expired {
  background-color: rgba(244, 67, 54, 0.1);
  color: var(--color-danger);
}

.status-badge--warning {
  background-color: rgba(255, 193, 7, 0.1);
  color: var(--color-warning);
}

.status-badge--valid {
  background-color: rgba(76, 175, 80, 0.1);
  color: var(--color-success);
}

.status-badge__icon {
  margin-right: 0.25rem;
  font-size: 1rem;
}