/* ============================================================
   NurseAndre Design System
   Master stylesheet for the NurseAndre health tools suite
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Vollkorn:ital,wght@0,400;0,600;1,400&family=Figtree:wght@300;400;500;600;700&display=swap');

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */

:root {
  /* --- Brand --- */
  --na-purple:          #7C5CBF;
  --na-purple-light:    #9B80D4;
  --na-purple-dark:     #5C3F99;
  --na-purple-subtle:   #F0EBF9;
  --na-purple-muted:    #E4D9F5;

  /* --- Surfaces (light mode) --- */
  --na-bg:              #FAFAF9;
  --na-bg-raised:       #FFFFFF;
  --na-bg-sunken:       #F4F3F1;
  --na-surface:         #FFFFFF;
  --na-surface-hover:   #F8F6FC;

  /* --- Borders --- */
  --na-border:          #E5E3DE;
  --na-border-strong:   #C9C5BC;
  --na-border-focus:    #7C5CBF;

  /* --- Text --- */
  --na-text:            #1C1917;
  --na-text-secondary:  #57534E;
  --na-text-muted:      #A8A29E;
  --na-text-inverse:    #FFFFFF;
  --na-text-link:       #7C5CBF;

  /* --- Semantic: Red --- */
  --na-red:             #DC2626;
  --na-red-light:       #FEF2F2;
  --na-red-border:      #FECACA;
  --na-red-text:        #991B1B;

  /* --- Semantic: Green --- */
  --na-green:           #16A34A;
  --na-green-light:     #F0FDF4;
  --na-green-border:    #BBF7D0;
  --na-green-text:      #14532D;

  /* --- Semantic: Amber --- */
  --na-amber:           #D97706;
  --na-amber-light:     #FFFBEB;
  --na-amber-border:    #FDE68A;
  --na-amber-text:      #78350F;

  /* --- Shadows --- */
  --na-shadow-sm:       0 1px 2px 0 rgba(0,0,0,0.05);
  --na-shadow:          0 1px 3px 0 rgba(0,0,0,0.08), 0 1px 2px -1px rgba(0,0,0,0.04);
  --na-shadow-md:       0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --na-shadow-lg:       0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);

  /* --- Radius --- */
  --na-radius-sm:       6px;
  --na-radius:          10px;
  --na-radius-lg:       16px;
  --na-radius-xl:       24px;
  --na-radius-full:     9999px;

  /* --- Spacing --- */
  --na-space-1:  4px;
  --na-space-2:  8px;
  --na-space-3:  12px;
  --na-space-4:  16px;
  --na-space-5:  20px;
  --na-space-6:  24px;
  --na-space-8:  32px;
  --na-space-10: 40px;
  --na-space-12: 48px;
  --na-space-16: 64px;

  /* --- Typography --- */
  --na-font-display: 'Vollkorn', Georgia, serif;
  --na-font-body:    'Figtree', system-ui, -apple-system, sans-serif;

  --na-text-xs:   0.75rem;
  --na-text-sm:   0.875rem;
  --na-text-base: 1rem;
  --na-text-lg:   1.125rem;
  --na-text-xl:   1.25rem;
  --na-text-2xl:  1.5rem;
  --na-text-3xl:  1.875rem;
  --na-text-4xl:  2.25rem;
  --na-text-5xl:  3rem;

  /* --- Transitions --- */
  --na-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --na-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Nav height --- */
  --na-nav-height: 64px;
}

/* ============================================================
   2. DARK MODE TOKENS
   ============================================================ */

[data-theme="dark"] {
  --na-bg:              #111110;
  --na-bg-raised:       #1C1C1A;
  --na-bg-sunken:       #0D0D0C;
  --na-surface:         #1C1C1A;
  --na-surface-hover:   #252422;

  --na-border:          #2E2C28;
  --na-border-strong:   #44403C;
  --na-border-focus:    #9B80D4;

  --na-text:            #FAFAF9;
  --na-text-secondary:  #A8A29E;
  --na-text-muted:      #57534E;
  --na-text-inverse:    #1C1917;
  --na-text-link:       #B39DDB;

  --na-purple-subtle:   #1E1629;
  --na-purple-muted:    #2C1F45;
  --na-purple-light:    #B39DDB;

  --na-red-light:       #1F0808;
  --na-red-border:      #7F1D1D;
  --na-red-text:        #FCA5A5;

  --na-green-light:     #071A0E;
  --na-green-border:    #14532D;
  --na-green-text:      #86EFAC;

  --na-amber-light:     #1C1002;
  --na-amber-border:    #78350F;
  --na-amber-text:      #FCD34D;

  --na-shadow-sm:       0 1px 2px 0 rgba(0,0,0,0.3);
  --na-shadow:          0 1px 3px 0 rgba(0,0,0,0.4), 0 1px 2px -1px rgba(0,0,0,0.3);
  --na-shadow-md:       0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --na-shadow-lg:       0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.3);
}

/* ============================================================
   3. BASE RESET
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--na-font-body);
  font-size: var(--na-text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--na-text);
  background-color: var(--na-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--na-transition-slow), color var(--na-transition-slow);
}

main {
  flex: 1;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--na-text-link);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--na-transition);
}

a:hover {
  color: var(--na-purple-dark);
}

h1, h2, h3, h4 {
  font-family: var(--na-font-display);
  line-height: 1.25;
  color: var(--na-text);
}

h1 { font-size: var(--na-text-4xl); font-weight: 400; }
h2 { font-size: var(--na-text-3xl); font-weight: 400; }
h3 { font-size: var(--na-text-2xl); font-weight: 400; }
h4 { font-size: var(--na-text-xl);  font-weight: 400; }

p {
  color: var(--na-text-secondary);
  line-height: 1.7;
}

ul, ol {
  padding-left: var(--na-space-5);
}

/* ============================================================
   4. NAVIGATION
   ============================================================ */

.na-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--na-nav-height);
  background-color: var(--na-surface);
  border-bottom: 1px solid var(--na-border);
  box-shadow: var(--na-shadow-sm);
  display: flex;
  align-items: center;
  padding: 0 var(--na-space-6);
  gap: var(--na-space-6);
  transition: background-color var(--na-transition-slow), border-color var(--na-transition-slow);
}

.na-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--na-space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.na-nav-brand img,
.na-nav-brand svg {
  height: 36px;
  width: auto;
}

.na-nav-brand-text {
  font-family: var(--na-font-display);
  font-size: var(--na-text-lg);
  color: var(--na-text);
  white-space: nowrap;
}

.na-nav-brand-logo-wrap {
  background-color: var(--na-purple);
  border-radius: var(--na-radius-sm);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.na-nav-tabs {
  display: flex;
  align-items: center;
  gap: var(--na-space-1);
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.na-nav-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--na-space-2);
  padding: var(--na-space-2) var(--na-space-3);
  border-radius: var(--na-radius-sm);
  font-size: var(--na-text-sm);
  font-weight: 500;
  font-family: var(--na-font-body);
  color: var(--na-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--na-transition), background-color var(--na-transition);
  border: none;
  background: none;
  cursor: pointer;
}

.na-nav-tab:hover {
  color: var(--na-text);
  background-color: var(--na-bg-sunken);
}

.na-nav-tab.active {
  color: var(--na-purple);
  background-color: var(--na-purple-subtle);
}

[data-theme="dark"] .na-nav-tab.active {
  color: var(--na-purple-light);
}

.na-nav-tab i[data-lucide] {
  width: 15px;
  height: 15px;
  stroke-width: 2;
  flex-shrink: 0;
}

.na-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--na-space-2);
  margin-left: auto;
  flex-shrink: 0;
}

/* Dark mode toggle button */
.na-dark-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--na-radius-sm);
  border: 1px solid var(--na-border);
  background: none;
  color: var(--na-text-secondary);
  cursor: pointer;
  transition: color var(--na-transition), background-color var(--na-transition), border-color var(--na-transition);
  font-size: 1rem;
}

.na-dark-toggle:hover {
  background-color: var(--na-bg-sunken);
  color: var(--na-text);
}

/* ============================================================
   5. LAYOUT UTILITIES
   ============================================================ */

.na-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--na-space-6);
}

.na-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--na-space-6);
}

.na-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--na-space-6);
}

.na-stack {
  display: flex;
  flex-direction: column;
  gap: var(--na-space-4);
}

.na-stack-sm {
  display: flex;
  flex-direction: column;
  gap: var(--na-space-2);
}

.na-stack-lg {
  display: flex;
  flex-direction: column;
  gap: var(--na-space-8);
}

.na-row {
  display: flex;
  align-items: center;
  gap: var(--na-space-3);
}

.na-row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--na-space-3);
}

.na-row-wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--na-space-3);
}

/* ============================================================
   6. CARD
   ============================================================ */

.na-card {
  background-color: var(--na-surface);
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-lg);
  padding: var(--na-space-6);
  box-shadow: var(--na-shadow);
  transition: background-color var(--na-transition-slow), border-color var(--na-transition-slow), box-shadow var(--na-transition);
}

.na-card-hover {
  cursor: pointer;
}

.na-card-hover:hover {
  box-shadow: var(--na-shadow-md);
  border-color: var(--na-border-strong);
  transform: translateY(-1px);
  transition: box-shadow var(--na-transition), border-color var(--na-transition), transform var(--na-transition);
}

.na-card-sm {
  padding: var(--na-space-4);
  border-radius: var(--na-radius);
}

.na-card-title {
  font-family: var(--na-font-display);
  font-size: var(--na-text-xl);
  font-weight: 400;
  color: var(--na-text);
  margin-bottom: var(--na-space-2);
}

.na-card-subtitle {
  font-size: var(--na-text-sm);
  color: var(--na-text-muted);
  margin-bottom: var(--na-space-4);
}

/* ============================================================
   7. BUTTONS
   ============================================================ */

.na-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--na-space-2);
  padding: var(--na-space-2) var(--na-space-4);
  border-radius: var(--na-radius-sm);
  font-family: var(--na-font-body);
  font-size: var(--na-text-sm);
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--na-transition), color var(--na-transition),
              border-color var(--na-transition), box-shadow var(--na-transition),
              transform var(--na-transition);
  -webkit-user-select: none;
  user-select: none;
}

.na-btn:focus-visible {
  outline: 2px solid var(--na-border-focus);
  outline-offset: 2px;
}

.na-btn:active {
  transform: scale(0.98);
}

.na-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.na-btn-primary {
  background-color: var(--na-purple);
  color: #FFFFFF;
  border-color: var(--na-purple);
}

.na-btn-primary:hover:not(:disabled) {
  background-color: var(--na-purple-dark);
  border-color: var(--na-purple-dark);
  color: #FFFFFF;
  box-shadow: 0 1px 4px rgba(124,92,191,0.35);
}

/* Ghost */
.na-btn-ghost {
  background-color: transparent;
  color: var(--na-text-secondary);
  border-color: var(--na-border);
}

.na-btn-ghost:hover:not(:disabled) {
  background-color: var(--na-bg-sunken);
  color: var(--na-text);
  border-color: var(--na-border-strong);
}

/* Danger */
.na-btn-danger {
  background-color: transparent;
  color: var(--na-red);
  border-color: var(--na-red-border);
}

.na-btn-danger:hover:not(:disabled) {
  background-color: var(--na-red-light);
  border-color: var(--na-red);
}

/* Sizes */
.na-btn-sm {
  padding: var(--na-space-1) var(--na-space-3);
  font-size: var(--na-text-xs);
}

.na-btn-lg {
  padding: var(--na-space-3) var(--na-space-6);
  font-size: var(--na-text-base);
  border-radius: var(--na-radius);
}

/* ============================================================
   8. FORM ELEMENTS
   ============================================================ */

.na-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--na-space-2);
}

.na-form-group.full {
  grid-column: 1 / -1;
}

.na-label {
  font-size: var(--na-text-sm);
  font-weight: 500;
  color: var(--na-text);
  display: block;
}

.na-label-hint {
  font-size: var(--na-text-xs);
  font-weight: 400;
  color: var(--na-text-muted);
  margin-left: var(--na-space-2);
}

.na-input,
.na-select,
.na-textarea {
  width: 100%;
  padding: var(--na-space-2) var(--na-space-3);
  background-color: var(--na-surface);
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-sm);
  font-family: var(--na-font-body);
  font-size: var(--na-text-sm);
  color: var(--na-text);
  line-height: 1.5;
  transition: border-color var(--na-transition), box-shadow var(--na-transition),
              background-color var(--na-transition-slow);
  -webkit-appearance: none;
  appearance: none;
}

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

.na-input:focus,
.na-select:focus,
.na-textarea:focus {
  outline: none;
  border-color: var(--na-border-focus);
  box-shadow: 0 0 0 3px rgba(124, 92, 191, 0.15);
}

.na-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23A8A29E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--na-space-3) center;
  padding-right: var(--na-space-8);
}

.na-textarea {
  min-height: 100px;
  resize: vertical;
}

/* ============================================================
   9. CHIPS
   ============================================================ */

.na-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--na-space-1);
  padding: var(--na-space-1) var(--na-space-3);
  border-radius: var(--na-radius-full);
  font-size: var(--na-text-sm);
  font-weight: 500;
  font-family: var(--na-font-body);
  border: 1px solid var(--na-border);
  background-color: var(--na-surface);
  color: var(--na-text-secondary);
  cursor: pointer;
  transition: background-color var(--na-transition), color var(--na-transition),
              border-color var(--na-transition);
  -webkit-user-select: none;
  user-select: none;
}

.na-chip:hover {
  border-color: var(--na-border-strong);
  color: var(--na-text);
}

.na-chip.selected {
  background-color: var(--na-purple-subtle);
  border-color: var(--na-purple);
  color: var(--na-purple);
}

[data-theme="dark"] .na-chip.selected {
  background-color: var(--na-purple-muted);
  border-color: var(--na-purple-light);
  color: var(--na-purple-light);
}

/* ============================================================
   10. BADGES
   ============================================================ */

.na-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--na-space-2);
  border-radius: var(--na-radius-full);
  font-size: var(--na-text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.na-badge-purple {
  background-color: var(--na-purple-subtle);
  color: var(--na-purple);
  border: 1px solid var(--na-purple-muted);
}

[data-theme="dark"] .na-badge-purple {
  background-color: var(--na-purple-muted);
  color: var(--na-purple-light);
}

.na-badge-red {
  background-color: var(--na-red-light);
  color: var(--na-red-text);
  border: 1px solid var(--na-red-border);
}

.na-badge-green {
  background-color: var(--na-green-light);
  color: var(--na-green-text);
  border: 1px solid var(--na-green-border);
}

.na-badge-amber {
  background-color: var(--na-amber-light);
  color: var(--na-amber-text);
  border: 1px solid var(--na-amber-border);
}

/* ============================================================
   11. ALERTS / TOASTS
   ============================================================ */

.na-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--na-space-3);
  padding: var(--na-space-4);
  border-radius: var(--na-radius);
  font-size: var(--na-text-sm);
  line-height: 1.5;
  border: 1px solid var(--na-border);
  background-color: var(--na-surface);
  color: var(--na-text);
  transition: opacity var(--na-transition-slow);
}

.na-alert-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 1px;
}

.na-alert-success {
  background-color: var(--na-green-light);
  border-color: var(--na-green-border);
  color: var(--na-green-text);
}

.na-alert-warning {
  background-color: var(--na-amber-light);
  border-color: var(--na-amber-border);
  color: var(--na-amber-text);
}

.na-alert-danger {
  background-color: var(--na-red-light);
  border-color: var(--na-red-border);
  color: var(--na-red-text);
}

.na-alert.hidden {
  display: none;
}

/* ============================================================
   12. EMPTY STATE
   ============================================================ */

.na-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--na-space-16) var(--na-space-8);
  color: var(--na-text-muted);
}

.na-empty-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--na-space-4);
  opacity: 0.4;
}

.na-empty-title {
  font-family: var(--na-font-display);
  font-size: var(--na-text-xl);
  color: var(--na-text-secondary);
  margin-bottom: var(--na-space-2);
}

.na-empty-text {
  font-size: var(--na-text-sm);
  max-width: 320px;
}

/* ============================================================
   13. MODAL
   ============================================================ */

.na-modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--na-space-6);
  z-index: 200;
  backdrop-filter: blur(2px);
  animation: na-fade-in 150ms ease;
}

.na-modal-overlay.hidden {
  display: none;
}

.na-modal {
  background-color: var(--na-surface);
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius-xl);
  box-shadow: var(--na-shadow-lg);
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  animation: na-slide-up 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.na-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--na-space-6) var(--na-space-6) var(--na-space-4);
  border-bottom: 1px solid var(--na-border);
}

.na-modal-title {
  font-family: var(--na-font-display);
  font-size: var(--na-text-xl);
  color: var(--na-text);
}

.na-modal-body {
  padding: var(--na-space-6);
}

.na-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--na-space-3);
  padding: var(--na-space-4) var(--na-space-6) var(--na-space-6);
}

/* ============================================================
   14. FOOTER
   ============================================================ */

.na-footer {
  margin-top: auto;
  padding: var(--na-space-8) var(--na-space-6);
  border-top: 1px solid var(--na-border);
  text-align: center;
  transition: border-color var(--na-transition-slow);
}

.na-footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--na-space-2);
}

.na-footer-brand {
  display: flex;
  align-items: center;
  gap: var(--na-space-2);
}

.na-footer-logo {
  background-color: var(--na-purple);
  border-radius: var(--na-radius-sm);
  width: 28px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px 4px;
}

.na-footer-logo img,
.na-footer-logo svg {
  height: 16px;
  width: auto;
}

.na-footer-text {
  font-size: var(--na-text-xs);
  color: var(--na-text-muted);
  line-height: 1.6;
}

.na-footer-text a {
  color: var(--na-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--na-transition);
}

.na-footer-text a:hover {
  color: var(--na-text-secondary);
}

.na-footer-divider {
  width: 1px;
  height: 12px;
  background-color: var(--na-border);
  display: inline-block;
  margin: 0 var(--na-space-2);
  vertical-align: middle;
}

/* ============================================================
   15. HERO / PAGE HEADER
   ============================================================ */

.na-hero {
  padding: var(--na-space-16) 0 var(--na-space-12);
  text-align: center;
}

.na-hero-logo {
  background-color: var(--na-purple);
  border-radius: var(--na-radius-xl);
  width: 100px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--na-space-8);
  padding: var(--na-space-3) var(--na-space-5);
  box-shadow: 0 4px 24px rgba(124, 92, 191, 0.3);
}

.na-hero-logo img,
.na-hero-logo svg {
  height: 52px;
  width: auto;
}

.na-hero-title {
  font-family: var(--na-font-display);
  font-size: var(--na-text-5xl);
  font-weight: 400;
  color: var(--na-text);
  margin-bottom: var(--na-space-4);
  line-height: 1.15;
}

.na-hero-subtitle {
  font-size: var(--na-text-lg);
  color: var(--na-text-secondary);
  max-width: 480px;
  margin: 0 auto;
  font-weight: 300;
}

/* ============================================================
   16. SECTION
   ============================================================ */

.na-section {
  padding: var(--na-space-12) 0;
}

.na-section-header {
  margin-bottom: var(--na-space-8);
}

.na-section-title {
  font-family: var(--na-font-display);
  font-size: var(--na-text-2xl);
  font-weight: 400;
  color: var(--na-text);
  margin-bottom: var(--na-space-2);
}

.na-section-desc {
  font-size: var(--na-text-sm);
  color: var(--na-text-muted);
}

/* ============================================================
   17. DIVIDER
   ============================================================ */

.na-divider {
  border: none;
  border-top: 1px solid var(--na-border);
  margin: var(--na-space-6) 0;
}

/* ============================================================
   18. TEXT UTILITIES
   ============================================================ */

.na-text-display { font-family: var(--na-font-display); }
.na-text-xs      { font-size: var(--na-text-xs); }
.na-text-sm      { font-size: var(--na-text-sm); }
.na-text-base    { font-size: var(--na-text-base); }
.na-text-lg      { font-size: var(--na-text-lg); }
.na-text-muted   { color: var(--na-text-muted); }
.na-text-secondary { color: var(--na-text-secondary); }
.na-text-purple  { color: var(--na-purple); }
.na-text-center  { text-align: center; }
.na-font-medium  { font-weight: 500; }
.na-font-semibold { font-weight: 600; }

/* ============================================================
   19. ANIMATIONS
   ============================================================ */

@keyframes na-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes na-slide-up {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

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

.na-spin {
  animation: na-spin 1s linear infinite;
}

/* ============================================================
   20. RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  :root {
    --na-nav-height: 56px;
  }

  .na-container {
    padding: 0 var(--na-space-4);
  }

  .na-hero-title {
    font-size: var(--na-text-3xl);
  }

  .na-hero-subtitle {
    font-size: var(--na-text-base);
  }

  .na-hero {
    padding: var(--na-space-10) 0 var(--na-space-8);
  }

  .na-grid-2,
  .na-grid-3 {
    grid-template-columns: 1fr;
  }

  .na-nav {
    padding: 0 var(--na-space-4);
    gap: var(--na-space-3);
  }

  .na-nav-tabs {
    display: none;
  }

  .na-modal {
    border-radius: var(--na-radius-lg);
  }

  h1 { font-size: var(--na-text-3xl); }
  h2 { font-size: var(--na-text-2xl); }
}

@media (max-width: 480px) {
  .na-hero-logo {
    width: 80px;
    height: 58px;
  }

  .na-hero-logo img,
  .na-hero-logo svg {
    height: 40px;
  }

  .na-grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   21. PRINT
   ============================================================ */

/* ── Bottom tab bar (mobile only) ── */
.na-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .na-nav-tabs {
    display: none;
  }

  .na-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background-color: var(--na-surface);
    border-top: 1px solid var(--na-border);
    z-index: 100;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
  }

  .na-bottom-nav-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border: none;
    background: none;
    color: var(--na-text-muted);
    font-family: var(--na-font-body);
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 4px;
    transition: color var(--na-transition);
    -webkit-tap-highlight-color: transparent;
  }

  .na-bottom-nav-tab i[data-lucide] {
    width: 22px;
    height: 22px;
    stroke-width: 1.8;
  }

  .na-bottom-nav-tab.active {
    color: var(--na-purple);
  }

  [data-theme="dark"] .na-bottom-nav-tab.active {
    color: var(--na-purple-light);
  }

  body {
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
  }
}

/* ── Star rating ── */
.star-rating {
  display: flex;
  gap: 6px;
}

.star-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--na-border);
  transition: color var(--na-transition), transform var(--na-transition);
  -webkit-tap-highlight-color: transparent;
}

.star-btn i[data-lucide] {
  width: 28px;
  height: 28px;
  stroke-width: 1.5;
}

.star-btn.filled {
  color: #F59E0B;
}

.star-btn:hover {
  transform: scale(1.15);
}

@media print {
  .na-nav,
  .na-footer,
  .no-print,
  .na-btn,
  .na-dark-toggle {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .na-card {
    border: 1px solid #ccc;
    box-shadow: none;
    break-inside: avoid;
  }

  .na-container {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: black;
    text-decoration: none;
  }

  h1, h2, h3, h4 {
    color: black;
  }
}