/* ============================================
   VARIABLES
   ============================================ */
:root {
  --color-primary: #c9a961;
  --color-primary-dark: #b08d45;
  --color-primary-light: #e5d4a8;

  --color-dark: #1a1a1a;
  --color-dark-soft: #2d2d2d;
  --color-gray: #6b6b6b;
  --color-gray-light: #a8a8a8;
  --color-light: #f5f5f5;
  --color-white: #ffffff;

  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;

  --font-display: "Playfair Display", serif;
  --font-body: "Inter", sans-serif;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);

  --transition: 0.3s ease;

  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;
}

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

body {
  font-family: var(--font-body);
  background: var(--color-light);
  color: var(--color-dark);
  line-height: 1.6;
}

/* ============================================
   LAYOUT
   ============================================ */
.admin-container {
  display: flex;
  min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  width: 280px;
  background: linear-gradient(180deg, var(--color-dark) 0%, var(--color-dark-soft) 100%);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  z-index: 100;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  filter: drop-shadow(0 2px 8px rgba(212, 165, 116, 0.3));
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  color: var(--color-gray-light);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  width: 100%;
  text-align: left;
}

.nav-item svg {
  width: 20px;
  height: 20px;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
}

.nav-item.active {
  background: var(--color-primary);
  color: var(--color-dark);
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.back-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-gray-light);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.back-link svg {
  width: 20px;
  height: 20px;
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: var(--spacing-xl);
}

.content-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--spacing-xs);
}

.page-subtitle {
  color: var(--color-gray);
  font-size: 1.125rem;
}

/* ============================================
   SECTIONS
   ============================================ */
.content-section {
  display: none;
}

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

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-dark);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(201, 169, 97, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201, 169, 97, 0.4);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-dark);
  border: 2px solid var(--color-light);
}

.btn-secondary:hover {
  border-color: var(--color-gray-light);
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-gray);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.btn-close:hover {
  background: var(--color-light);
  color: var(--color-dark);
}

.btn-close svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   FORMS
   ============================================ */
.form-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-lg);
}

.form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-light);
}

.form-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-dark);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

@media (min-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-label {
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.875rem;
}

.form-input,
.form-textarea {
  padding: 0.875rem 1rem;
  border: 2px solid var(--color-light);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-dark);
  background: var(--color-white);
  transition: all var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* ============================================
   ITEMS GRID
   ============================================ */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.item-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.item-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.item-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.item-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--spacing-md);
}

.item-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--spacing-xs);
}

.item-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-display);
}

.item-description {
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.item-actions {
  display: flex;
  gap: var(--spacing-xs);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-light);
}

.promo-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-primary);
  color: var(--color-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.promo-prices {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.promo-price-old {
  font-size: 1rem;
  color: var(--color-gray);
  text-decoration: line-through;
}

.promo-price-new {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-display);
}

.promo-validity {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-gray);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.promo-validity svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    width: 240px;
  }

  .main-content {
    margin-left: 240px;
    padding: var(--spacing-md);
  }

  .page-title {
    font-size: 2rem;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .main-content {
    margin-left: 0;
  }

  .section-header {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================
   ANIMACIONES
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.item-card {
  animation: fadeIn 0.4s ease both;
}

.item-card:nth-child(1) {
  animation-delay: 0.05s;
}

.item-card:nth-child(2) {
  animation-delay: 0.1s;
}

.item-card:nth-child(3) {
  animation-delay: 0.15s;
}

.item-card:nth-child(4) {
  animation-delay: 0.2s;
}

.item-card:nth-child(5) {
  animation-delay: 0.25s;
}

.item-card:nth-child(6) {
  animation-delay: 0.3s;
}