/* =============================================================================
   FinePointRehab Component Library
   Reusable UI components that work with tokens.css and base.css
   Mobile-first, accessible, and theme-aware components
   ============================================================================= */

/* =============================================================================
   BUTTON COMPONENTS
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--easing), 
              box-shadow var(--duration-fast) var(--easing),
              background-color var(--duration-fast) var(--easing),
              border-color var(--duration-fast) var(--easing);
  min-height: var(--touch-target);
  position: relative;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

.btn-primary {
  background: var(--brand-gradient);
  color: white;
  border-color: var(--brand-blue);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

.btn-secondary {
  background: var(--bg-primary);
  color: var(--brand-blue);
  border-color: var(--brand-blue);
}
.btn-secondary:hover {
  background: var(--brand-blue);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-success {
  background: var(--success);
  color: white;
  border-color: var(--success);
}
.btn-success:hover {
  background: var(--success);
  border-color: var(--success-border);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  filter: brightness(1.1);
}

.btn-danger {
  background: var(--error);
  color: white;
  border-color: var(--error);
}
.btn-danger:hover {
  background: var(--error);
  border-color: var(--error-border);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  filter: brightness(1.1);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

/* Button sizes */
.btn-xs { padding: var(--space-1) var(--space-3); font-size: var(--font-size-xs); min-height: calc(var(--touch-target) * 0.7); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--font-size-sm); min-height: calc(var(--touch-target) * 0.8); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
.btn-xl { padding: var(--space-5) var(--space-10); font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); min-height: calc(var(--touch-target) * 1.2); }

.btn-full { width: 100%; }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
  transform: none !important;
  box-shadow: none !important;
}

.btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.btn:focus { outline: 2px solid var(--focus); outline-offset: 2px; }
.btn:focus:not(:focus-visible) { outline: none; }

.btn-loading { pointer-events: none; position: relative; }
.btn-loading > * { visibility: hidden; }
.btn-loading::after {
  content: "";
  position: absolute;
  inset: 50% auto auto 50%;
  width: 16px; height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin var(--duration-slow) linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =============================================================================
   CARD COMPONENTS
   ============================================================================= */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--duration-fast) var(--easing),
              box-shadow var(--duration-fast) var(--easing);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.card-header { padding: var(--space-6); border-bottom: 1px solid var(--border-light); }
.card-body { padding: var(--space-6); }
.card-footer { padding: var(--space-6); border-top: 1px solid var(--border-light); background: var(--bg-secondary); }

.card-exercise {
  cursor: pointer;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  position: relative;
  overflow: hidden;
}
.card-exercise:hover { border-color: var(--brand-aqua); transform: translateY(-4px); box-shadow: var(--shadow); }
.card-exercise:focus-within { border-color: var(--focus); outline: none; }
.card-exercise-icon {
  display: flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; margin: 0 auto var(--space-4);
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  color: white; font-size: var(--font-size-2xl);
}
.card-exercise-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  text-align: center;
}
.card-exercise-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  text-align: center;
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

.card-compact .card-header,
.card-compact .card-body,
.card-compact .card-footer { padding: var(--space-4); }

/* =============================================================================
   PROGRESS COMPONENTS
   ============================================================================= */

.progress {
  width: 100%;
  height: var(--space-2);
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}
.progress-bar {
  height: 100%;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  transition: width var(--duration-medium) var(--easing);
  position: relative;
  overflow: hidden;
}
.progress-bar-animated::after {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 20px 20px;
  animation: progressSlide 1s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
  .progress-bar-animated::after { animation: none; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@keyframes progressSlide { 0% { background-position: 0 0; } 100% { background-position: 20px 0; } }

.progress-labeled { display: flex; align-items: center; gap: var(--space-3); }
.progress-labeled .progress { flex: 1; }
.progress-label { font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); color: var(--text-secondary); min-width: fit-content; }
.progress-lg { height: var(--space-3); }
.progress-lg .progress-bar { border-radius: var(--radius-full); }

/* =============================================================================
   MODAL COMPONENTS
   ============================================================================= */

.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-4);
  z-index: var(--z-modal);
  opacity: 0; visibility: hidden;
  transition: all var(--duration-fast) var(--easing);
}
.modal-overlay.modal-open { opacity: 1; visibility: visible; }

.modal {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px; width: 100%;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--duration-fast) var(--easing);
}
.modal-overlay.modal-open .modal { transform: scale(1) translateY(0); }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border);
}
.modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0;
}
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius);
  transition: color var(--duration-fast) var(--easing),
              background-color var(--duration-fast) var(--easing);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { color: var(--text-primary); background: var(--bg-secondary); }
.modal-body { padding: var(--space-6); overflow-y: auto; max-height: calc(90vh - 140px); }
.modal-footer { display: flex; gap: var(--space-3); padding: var(--space-6); border-top: 1px solid var(--border); background: var(--bg-secondary); }

/* =============================================================================
   BADGE COMPONENTS
   ============================================================================= */

.badge {
  display: inline-flex; align-items: center; gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs); font-weight: var(--font-weight-medium);
  line-height: 1; border-radius: var(--radius-full);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.badge-primary { background: var(--brand-blue); color: white; }
.badge-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success-border); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-error { background: var(--error-bg); color: var(--error); border: 1px solid var(--error-border); }
.badge-info { background: var(--info-bg); color: var(--info); border: 1px solid var(--info-border); }
.badge-sm { padding: calc(var(--space-1) * 0.5) var(--space-2); font-size: calc(var(--font-size-xs) * 0.9); }
.badge-lg { padding: var(--space-2) var(--space-4); font-size: var(--font-size-sm); }

/* =============================================================================
   TOAST/NOTIFICATION COMPONENTS
   ============================================================================= */

.toast-container {
  position: fixed;
  top: var(--space-4); right: var(--space-4);
  z-index: var(--z-toast);
  display: flex; flex-direction: column; gap: var(--space-3);
  max-width: 400px;
  pointer-events: none;
}
.toast { background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: var(--space-4); display: flex; align-items: flex-start; gap: var(--space-3); transform: translateX(calc(100% + var(--space-4))); transition: transform var(--duration-medium) var(--easing); pointer-events: auto; }
.toast.toast-show { transform: translateX(0); }
.toast-icon { flex-shrink: 0; width: 20px; height: 20px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; font-size: var(--font-size-sm); margin-top: 2px; }
.toast-content { flex: 1; min-width: 0; }
.toast-title { font-weight: var(--font-weight-semibold); color: var(--text-primary); margin-bottom: var(--space-1); font-size: var(--font-size-sm); }
.toast-message { color: var(--text-secondary); font-size: var(--font-size-sm); line-height: var(--line-height-relaxed); }
.toast-close { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: var(--space-1); border-radius: var(--radius); transition: color var(--duration-fast) var(--easing); flex-shrink: 0; }
.toast-close:hover { color: var(--text-primary); }
.toast-success { border-left: 4px solid var(--success); }
.toast-success .toast-icon { background: var(--success); color: white; }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-warning .toast-icon { background: var(--warning); color: white; }
.toast-error { border-left: 4px solid var(--error); }
.toast-error .toast-icon { background: var(--error); color: white; }
.toast-info { border-left: 4px solid var(--info); }
.toast-info .toast-icon { background: var(--info); color: white; }

/* =============================================================================
   NAVIGATION COMPONENTS
   ============================================================================= */

.nav { display: flex; align-items: center; gap: var(--space-1); }
.nav-link {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  font-weight: var(--font-weight-medium);
  transition: all var(--duration-fast) var(--easing);
  min-height: var(--touch-target);
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-secondary); }
.nav-link.nav-link-active { color: var(--brand-blue); background: rgba(37, 99, 235, 0.1); }

/* Mobile nav */
.nav-mobile {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
  display: flex; z-index: var(--z-nav);
  padding: var(--space-2);
  padding-bottom: calc(var(--space-2) + env(safe-area-inset-bottom));
}
.nav-mobile .nav-link {
  flex: 1; flex-direction: column; text-align: center;
  font-size: var(--font-size-xs);
  padding: var(--space-2);
  gap: var(--space-1);
}

/* =============================================================================
   NAVIGATION HEADER FIX (aligns with base.css)
   ============================================================================= */

header .nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
}
header .nav-link {
  position: relative;
  margin-left: auto; /* ensures Contact sits right */
}

/* =============================================================================
   LAYOUT COMPONENTS
   ============================================================================= */

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--space-4); }
.container-sm { max-width: 640px; }
.container-lg { max-width: 1400px; }

.grid { display: grid; gap: var(--space-6); }
.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (min-width: 640px) { .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); } .sm\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); } .sm\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 768px) { .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); } .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); } .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1024px) { .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); } .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); } .lg\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); } }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* =============================================================================
   MOBILE OPTIMIZATIONS
   ============================================================================= */

@media (max-width: 767px) {
  .btn, .nav-link, .modal-close { min-height: 48px; min-width: 48px; }
  .card-exercise { margin-bottom: var(--space-4); }
  .modal-footer { flex-direction: column; }
  .modal-footer .btn { width: 100%; }
  .toast-container { top: var(--space-2); right: var(--space-2); left: var(--space-2); max-width: none; }
  .progress { height: var(--space-3); }
  .progress-lg { height: var(--space-4); }
}

/* =============================================================================
   DARK THEME
   ============================================================================= */

[data-theme="dark"] .card-exercise:hover { box-shadow: var(--shadow-lg); }
[data-theme="dark"] .modal { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8); }
[data-theme="dark"] .toast { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8); }

/* =============================================================================
   HIGH CONTRAST
   ============================================================================= */

[data-theme="contrast"] .btn { border-width: 2px; font-weight: var(--font-weight-semibold); }
[data-theme="contrast"] .card { border-width: 2px; }
[data-theme="contrast"] .card-exercise { border-width: 3px; }
[data-theme="contrast"] .progress { border: 1px solid var(--border); }

/* =============================================================================
   PRINT
   ============================================================================= */

@media print {
  .btn, .modal-overlay, .toast-container, .nav-mobile, .skip-link { display: none !important; }
  .card { border: 1px solid #000; break-inside: avoid; page-break-inside: avoid; }
}

/* =============================================================================
   SHARED FOUNDATION COMPONENTS (HUD / Page headers etc.)
   ============================================================================= */

.app-wrap { display: grid; grid-template-columns: minmax(260px, 360px) 1fr; gap: var(--space-4, 16px); max-width: 1200px; margin: 0 auto; padding: var(--space-5, 20px); }
@media (max-width: 900px) { .app-wrap { grid-template-columns: 1fr; } }
.hud { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--space-3, 12px); }

.page-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(6px);
  background: var(--surface-blur, rgba(12, 14, 28, 0.65));
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-3, 12px) var(--space-4, 16px);
}
.page-header .row { display: flex; align-items: center; gap: var(--space-3, 12px); }
.page-header h1 { font-size: clamp(1.1rem, 1.6vw, 1.5rem); margin: 0; flex: 1; }

.timer-bar-container { width: 100%; height: 8px; background: rgba(255,255,255,0.08); border-radius: 4px; overflow: hidden; margin-top: var(--space-3, 12px); }
.timer-bar { height: 100%; border-radius: 4px; transition: width .1s linear; }

.game-container { position: relative; }
.is-paused [data-interactive] { pointer-events: none; }
.pause-overlay { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(6,7,16,.75); z-index: 50; font-size: 1.5rem; font-weight: 600; color: white; }