/* ==========================================================================
   AudiTax Component Library — Modular, Premium UI Elements
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.75rem 1.6rem;
  font-size: var(--font-size-small);
  font-weight: var(--fw-semibold);
  font-family: var(--font-display);
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn-lg {
  padding: 0.85rem 1.8rem;
  font-size: var(--font-size-body);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: var(--font-size-caption);
}

/* Primary Button: Refined Gold / Prestige */
.btn-primary {
  background: var(--gradient-gold);
  color: #0B192C;
  border: 1px solid rgba(197, 168, 128, 0.4);
  box-shadow: 0 2px 10px rgba(197, 168, 128, 0.25);
  font-weight: var(--fw-bold);
}

.btn-primary:hover {
  background: var(--gradient-gold-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

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

/* Secondary Button: Clean Navy / Slate */
.btn-secondary {
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Ghost / Outline Button (for Dark Backgrounds & Heros) */
.btn-outline {
  background-color: transparent;
  color: var(--text-on-dark, #FFFFFF);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--accent);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Text link button with animated arrow */
.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--accent);
  font-weight: var(--fw-semibold);
  font-size: var(--font-size-small);
  padding: 0;
  background: none;
  border: none;
}

.btn-link:hover {
  color: var(--accent-hover);
}

.btn-link svg {
  transition: transform var(--transition-fast);
}

[dir="rtl"] .btn-link:hover svg {
  transform: translateX(-4px);
}

[dir="ltr"] .btn-link:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.card-dark {
  background-color: var(--secondary-dark);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--text-inverse);
}

.card-dark:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-lg);
}

/* Top accent bar on cards */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  inset-inline-start: 0;
  width: 0%;
  height: 3px;
  background: var(--gradient-gold);
  transition: width var(--transition-normal);
}

.card:hover::before {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Badges & Pills
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.65rem;
  font-size: var(--font-size-caption);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-pill);
  background-color: var(--surface-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.badge-accent {
  background-color: var(--accent-subtle);
  color: var(--accent);
  border-color: var(--accent-border);
}

.badge-success {
  background-color: var(--success-bg);
  color: var(--success);
  border-color: rgba(16, 185, 129, 0.3);
}

/* --------------------------------------------------------------------------
   Tabs Navigation
   -------------------------------------------------------------------------- */
.tabs-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  font-size: var(--font-size-small);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --------------------------------------------------------------------------
   Form Controls
   -------------------------------------------------------------------------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 680px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-group.col-span-2 {
  grid-column: span 2;
}

@media (max-width: 680px) {
  .form-group.col-span-2 {
    grid-column: span 1;
  }
}

.form-label {
  font-size: var(--font-size-small);
  font-weight: var(--fw-semibold);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-label .required-mark {
  color: var(--accent);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1.15rem;
  font-size: 1rem; /* 16px prevents iOS auto-zoom on mobile inputs */
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  min-height: 44px; /* Accessible mobile touch target */
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

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

.form-error-msg {
  font-size: var(--font-size-caption);
  color: var(--error);
  display: none;
  margin-top: 0.25rem;
}

.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea {
  border-color: var(--error);
  background-color: var(--error-bg);
}

.form-group.has-error .form-error-msg {
  display: block;
}

/* --------------------------------------------------------------------------
   Accessible Modal Dialog
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(6, 13, 23, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-normal);
  position: relative;
}

.modal-backdrop.is-open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  inset-inline-end: 1.25rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background-color: var(--surface-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text);
  background-color: var(--border);
}

/* --------------------------------------------------------------------------
   Controls & Switchers (Theme, Language)
   -------------------------------------------------------------------------- */
.switcher-group {
  display: inline-flex;
  align-items: center;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 2px;
}

.switcher-btn {
  padding: 0.35rem 0.75rem;
  font-size: var(--font-size-caption);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

.switcher-btn:hover {
  color: var(--text);
}

.switcher-btn.active {
  background-color: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.theme-palette-select {
  padding: 0.35rem 0.65rem;
  font-size: var(--font-size-caption);
  font-weight: var(--fw-semibold);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: var(--surface);
  color: var(--text);
  cursor: pointer;
}