/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  border: none;
  text-decoration: none;
  transition: background var(--transition-spring), transform var(--transition-spring), box-shadow var(--transition-spring);
  box-shadow: 0 2px 12px rgba(184,149,106,0.25), 0 1px 0 rgba(255,255,255,0.2) inset;
}

.btn:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184,149,106,0.35), 0 1px 0 rgba(255,255,255,0.2) inset;
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  box-shadow: none;
}

.btn--ghost:hover {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(184,149,106,0.25);
}

/* Card — glassmorphism */
.card {
  background: var(--color-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-glass-border);
  box-shadow: 0 8px 32px rgba(61,47,31,0.10), 0 1px 0 var(--color-glass-inset) inset;
  transition: transform var(--transition-spring), box-shadow var(--transition-spring);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(61,47,31,0.14), 0 1px 0 var(--color-glass-inset) inset;
}

.card__title {
  font-family: var(--font-script);
  color: var(--color-primary);
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-2);
}

/* Form */
.form-field { margin-bottom: var(--space-4); }

.form-label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--fs-base);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: var(--backdrop-blur-sm);
  -webkit-backdrop-filter: var(--backdrop-blur-sm);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-spring), box-shadow var(--transition-spring), background var(--transition-spring);
  -webkit-appearance: none;
  appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.82);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(184, 149, 106, 0.18);
}

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

.form-error {
  color: #B85450;
  font-size: var(--fs-sm);
  margin-top: var(--space-2);
  display: none;
}

.form-error.is-visible { display: block; }

/* Section heading helper */
.section__title {
  font-family: var(--font-script);
  color: var(--color-primary);
  font-size: clamp(2.5rem, 6vw, var(--fs-4xl));
  text-align: center;
  margin-bottom: var(--space-6);
}

.section__overline {
  text-align: center;
  font-size: var(--fs-xs);
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.music-hint {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9000;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.85);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  pointer-events: none;
  animation: hintPulse 2s ease-in-out infinite;
}

@keyframes hintPulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}