/* Header & Navigation */
.yen-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.yen-header-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.yen-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-primary);
  text-decoration: none;
}

.yen-brand-logo {
  font-size: 1.8rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-pill);
  background-color: var(--color-border);
  font-weight: 600;
  gap: 0.4rem;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.btn-icon:hover {
  transform: translateY(-2px);
  background-color: #d0f0f5;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-pill);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
  transition: all var(--transition-fast);
}

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

.btn-secondary {
  background: var(--color-secondary);
  color: #fff;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-pill);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-speak {
  background: #e1f5fe;
  color: #0288d1;
  border-radius: var(--radius-pill);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: var(--spacing-sm);
}

.btn-speak:hover {
  background: #b3e5fc;
}

/* Progress bar */
.progress-bar-container {
  width: 100%;
  height: 12px;
  background: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin: var(--spacing-md) 0;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-green));
  width: 0%;
  transition: width 0.4s ease;
}

/* Toast */
.yen-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #323232;
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.yen-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Cards */
.card {
  background: var(--color-card-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--color-border);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

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

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

.card-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

/* Component Container */
.component-wrapper {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-lg);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.component-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #1a202c;
}