/**
 * Mobile-First Responsive Styles
 * Base styles for mobile (320px+), with breakpoints for tablet and desktop
 */

/* Layout */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: white;
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
}

.app-main {
  flex: 1;
  padding: var(--spacing-lg) 0;
  overflow-y: auto;
}

.app-footer {
  position: sticky;
  bottom: 0;
  z-index: 100;
  background: white;
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Progress Indicator */
.progress-indicator {
  margin-top: var(--spacing-sm);
}

.progress-text {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.progress-bar-container {
  width: 100%;
  height: 4px;
  background: var(--bg-light);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transition: width 0.3s ease;
}

/* Step Container */
.step-container {
  min-height: 300px;
}

.step-header {
  margin-bottom: var(--spacing-lg);
}

.step-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-color);
}

/* Navigation Buttons */
.nav-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: space-between;
}

.nav-buttons button {
  flex: 1;
  max-width: 200px;
}

.nav-buttons button:only-child {
  margin-left: auto;
}

/* Touch-Friendly Elements */
button,
.btn,
a.btn,
input[type="checkbox"],
input[type="radio"] {
  min-height: var(--touch-target);
  min-width: var(--touch-target);
}

/* Form Elements */
input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: white;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Loading State */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-light);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 80px;
  right: var(--spacing-md);
  z-index: 1000;
  max-width: 400px;
}

.toast {
  background: white;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-left: 4px solid var(--primary-color);
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-left-color: var(--success-color);
}

.toast.error {
  border-left-color: var(--danger-color);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Tablet Breakpoint (768px+) */
@media (min-width: 768px) {
  .app-header,
  .app-footer {
    padding: var(--spacing-lg) 0;
  }

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

  .nav-buttons button {
    max-width: 250px;
  }
}

/* Desktop Breakpoint (1024px+) */
@media (min-width: 1024px) {
  .app-main {
    padding: var(--spacing-xl) 0;
  }

  .step-container {
    min-height: 400px;
  }
}

/* Landscape Mode */
@media (orientation: landscape) and (max-height: 600px) {
  .app-header {
    padding: var(--spacing-sm) 0;
  }

  .app-footer {
    padding: var(--spacing-sm) 0;
  }
}