/* ===================================
   EternalTech Component Styles
   Reusable UI Components
   =================================== */

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--button-padding-y) var(--button-padding-x);
  font-size: var(--button-font-size);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--button-border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--font-size-lg);
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: none;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: 0.5rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
  color: white;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  display: flex;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Service Categories ===== */

.service-categories {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.category-tab {
  padding: 0.75rem 1.5rem;
  background-color: var(--color-bg);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-base);
}

.category-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.category-tab.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

/* ===== Service Cards ===== */

.service-card {
  background-color: var(--color-bg);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.25s ease,
              border-color 0.25s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  border: 2px solid transparent;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
  will-change: opacity, transform;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }
.service-card:nth-child(5) { animation-delay: 0.5s; }
.service-card:nth-child(6) { animation-delay: 0.6s; }
.service-card:nth-child(7) { animation-delay: 0.7s; }
.service-card:nth-child(8) { animation-delay: 0.8s; }
.service-card:nth-child(9) { animation-delay: 0.9s; }

.service-card:hover {
  transform: translateY(-8px) scale(1.02) !important;
  box-shadow: var(--card-shadow-hover);
  border-color: var(--color-primary);
}

.service-card.hide {
  display: none;
}

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

.service-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: inline-block;
}

.service-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.service-description {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

.service-features {
  list-style: none;
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.service-features li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-light);
  position: relative;
  padding-left: var(--spacing-md);
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

.service-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: gap var(--transition-fast);
}

.service-link:hover {
  gap: var(--spacing-sm);
}

/* ===== Forms ===== */

.contact-form {
  background-color: var(--color-bg);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  border: 2px solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--input-focus-border-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
}

.form-message.success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}

.form-message.error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

/* Form validation states */
.form-group input:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown) {
  border-color: var(--color-error);
}

.form-group input:valid:not(:placeholder-shown),
.form-group textarea:valid:not(:placeholder-shown) {
  border-color: var(--color-success);
}

/* ===== Cards ===== */

.card {
  background-color: var(--color-bg);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
}

.card-hover {
  transition: all var(--transition-base);
}

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

/* ===== Badges & Tags ===== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background-color: var(--color-bg-light);
  color: var(--color-text);
}

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

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

/* ===== Dividers ===== */

.divider {
  height: 1px;
  background-color: var(--color-gray-200);
  margin: var(--spacing-lg) 0;
}

/* ===== Loading States ===== */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Theme toggle removed */

/* Smooth transitions for interactive elements */
.btn, .nav-link, .service-link, .service-card {
  transition: color var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

/* ===== Alerts ===== */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.alert-info {
  background-color: #dbeafe;
  color: #1e40af;
  border: 1px solid #3b82f6;
}

.alert-success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}

.alert-warning {
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #f59e0b;
}

.alert-error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

/* ===== Grid Utilities ===== */

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ===== Flex Utilities ===== */

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* ===== Spacing Utilities ===== */

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* ===== Text Utilities ===== */

.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

/* ===== Background Utilities ===== */

.bg-light { background-color: var(--color-bg-light); }
.bg-dark { background-color: var(--color-gray-900); }
.bg-gradient { background: var(--gradient-primary); }

/* ===== Shadow Utilities ===== */

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ===== Border Utilities ===== */

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }