/* ============================================================
   تمارين الإبهام والرسغ — style.css
   Variables | Reset | Layout | Components | Player | Animations
   Responsive | Dark mode | Reduced motion
   ============================================================ */

/* ---------- Variables ---------- */
:root {
  --color-bg: #f3f7f6;
  --color-bg-soft: #e8f1ef;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.88);
  --color-text: #1a2b2a;
  --color-text-muted: #5a6e6c;
  --color-border: #d5e3e0;
  --color-primary: #2a9d8f;
  --color-primary-dark: #1f7a6f;
  --color-primary-soft: rgba(42, 157, 143, 0.12);
  --color-warning: #e09f3e;
  --color-warning-soft: rgba(224, 159, 62, 0.15);
  --color-danger: #c44536;
  --color-danger-soft: rgba(196, 69, 54, 0.12);
  --color-success: #2d8a5e;
  --color-success-soft: rgba(45, 138, 94, 0.12);
  --color-info: #3a7ca5;
  --color-info-soft: rgba(58, 124, 165, 0.12);
  --color-skin: #e8c4a8;
  --color-skin-stroke: #c49a78;
  --color-joint: rgba(42, 157, 143, 0.35);
  --color-arrow: #2a9d8f;
  --shadow-sm: 0 1px 3px rgba(26, 43, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 43, 42, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --font: "Cairo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --header-h: 3.5rem;
  --banner-h: 2.5rem;
  --max-w: 720px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --anim-speed: 1;
  --ring-circumference: 326.73;
}

[data-theme="dark"] {
  --color-bg: #121a19;
  --color-bg-soft: #1a2624;
  --color-surface: #1e2a28;
  --color-surface-glass: rgba(30, 42, 40, 0.92);
  --color-text: #e8f0ee;
  --color-text-muted: #9aadaa;
  --color-border: #2f403d;
  --color-primary: #3db8a8;
  --color-primary-dark: #2a9d8f;
  --color-primary-soft: rgba(61, 184, 168, 0.18);
  --color-skin: #c9a078;
  --color-skin-stroke: #a67c52;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #121a19;
    --color-bg-soft: #1a2624;
    --color-surface: #1e2a28;
    --color-surface-glass: rgba(30, 42, 40, 0.92);
    --color-text: #e8f0ee;
    --color-text-muted: #9aadaa;
    --color-border: #2f403d;
    --color-primary: #3db8a8;
    --color-primary-dark: #2a9d8f;
    --color-primary-soft: rgba(61, 184, 168, 0.18);
    --color-skin: #c9a078;
    --color-skin-stroke: #a67c52;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background:
    radial-gradient(ellipse at 20% 0%, var(--color-bg-soft) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 10%, rgba(42, 157, 143, 0.08) 0%, transparent 40%),
    var(--color-bg);
  min-height: 100dvh;
  direction: rtl;
}

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

button, input {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  padding-inline-start: 1.25rem;
}

h1, h2, h3 {
  line-height: 1.3;
  margin: 0 0 var(--space-3);
  font-weight: 700;
}

h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); }
h2 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h3 { font-size: 1.1rem; }

p { margin: 0 0 var(--space-3); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.hidden { display: none !important; }

.skip-link {
  position: absolute;
  top: -100px;
  right: var(--space-4);
  z-index: 1000;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: var(--space-2);
}

/* ---------- Layout ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-glass);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
}

.brand-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-text {
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.safety-banner {
  background: var(--color-warning-soft);
  color: var(--color-text);
  text-align: center;
  font-size: 0.8rem;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  line-height: 1.4;
}

.main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-7);
}

.screen {
  animation: fadeIn 0.35s var(--ease);
}

.screen[hidden] {
  display: none !important;
}

.site-footer {
  text-align: center;
  padding: var(--space-4);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ---------- Components ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.card-accent {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.hero-card .eyebrow {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-2);
}

.lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

.muted {
  color: var(--color-text-muted);
}

.note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
}

[data-theme="dark"] .chip,
:root:not([data-theme="light"]) .chip {
  color: var(--color-primary);
}

.chip svg {
  width: 18px;
  height: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  text-align: center;
  border: 2px solid transparent;
}

.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-lg {
  min-height: 56px;
  font-size: 1.05rem;
  padding: 0.85rem 1.5rem;
}

.btn-sm {
  min-height: 36px;
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  border-color: transparent;
}

[data-theme="dark"] .btn-secondary {
  color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(42, 157, 143, 0.22);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.btn-danger-ghost {
  background: transparent;
  color: var(--color-danger);
  border-color: rgba(196, 69, 54, 0.35);
}

.btn-danger-ghost:hover:not(:disabled) {
  background: var(--color-danger-soft);
}

.icon-btn {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.icon-btn:hover {
  background: var(--color-bg-soft);
}

.icon-btn svg {
  width: 22px;
  height: 22px;
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-moon { display: block; }
}

[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

.btn-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.btn-row.wrap { flex-wrap: wrap; }

.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  margin: var(--space-4) 0;
  border: 1px solid transparent;
}

.alert.compact {
  margin-top: var(--space-3);
  font-size: 0.875rem;
}

.alert-success {
  background: var(--color-success-soft);
  border-color: rgba(45, 138, 94, 0.3);
  color: var(--color-success);
}

.alert-warning {
  background: var(--color-warning-soft);
  border-color: rgba(224, 159, 62, 0.35);
  color: #8a5a12;
}

[data-theme="dark"] .alert-warning,
:root:not([data-theme="light"]) .alert-warning {
  color: #f0c57a;
}

.alert-danger {
  background: var(--color-danger-soft);
  border-color: rgba(196, 69, 54, 0.35);
  color: var(--color-danger);
}

.alert-info {
  background: var(--color-info-soft);
  border-color: rgba(58, 124, 165, 0.3);
  color: var(--color-info);
}

/* Pain slider */
.pain-slider-block {
  margin: var(--space-5) 0;
}

.pain-value-display {
  text-align: center;
  margin-bottom: var(--space-3);
}

.pain-number {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

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

input[type="range"] {
  width: 100%;
  height: 8px;
  appearance: none;
  background: var(--color-border);
  border-radius: 999px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  cursor: pointer;
}

.slider-ends {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.checklist {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.checklist legend {
  font-weight: 600;
  padding: 0 var(--space-2);
}

.check-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  cursor: pointer;
}

.check-item input {
  width: 20px;
  height: 20px;
  accent-color: var(--color-danger);
}

.instruction-list {
  margin: var(--space-4) 0;
}

.instruction-list li {
  margin-bottom: var(--space-2);
}

.instruction-list.numbered {
  list-style: decimal;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin: var(--space-4) 0;
}

.toggle-row input {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
}

.badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
}

.badge-soft {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

[data-theme="dark"] .badge-soft {
  color: var(--color-primary);
}

.name-en {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: calc(-1 * var(--space-2));
  font-weight: 500;
}

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

.cue {
  text-align: center;
  font-weight: 500;
  min-height: 1.5em;
  color: var(--color-primary-dark);
}

[data-theme="dark"] .cue {
  color: var(--color-primary);
}

.status-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-4);
  color: var(--color-success);
}

.status-icon.danger {
  color: var(--color-danger);
}

.status-icon svg {
  width: 100%;
  height: 100%;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.stat {
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.pain-options {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.pain-opt {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-weight: 600;
  text-align: right;
  transition: border-color 0.2s, background 0.2s;
}

.pain-opt:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.pain-opt:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.pain-opt-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

.pain-opt-icon.ok { background: var(--color-success-soft); color: var(--color-success); }
.pain-opt-icon.mild { background: var(--color-warning-soft); color: var(--color-warning); }
.pain-opt-icon.moderate { background: rgba(224, 159, 62, 0.25); color: #c07820; }
.pain-opt-icon.severe { background: var(--color-danger-soft); color: var(--color-danger); }

.toast {
  position: fixed;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  z-index: 200;
  font-weight: 500;
  max-width: 90vw;
  text-align: center;
}

/* Library */
.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.filter-btn {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
}

.filter-btn.active,
.filter-btn[aria-pressed="true"] {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.library-grid {
  display: grid;
  gap: var(--space-4);
}

.library-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.library-card .thumb {
  height: 130px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.library-card .thumb svg {
  width: 118px;
  height: 118px;
}

.library-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-1);
}

.library-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0;
  font-size: 0.8rem;
}

.library-meta span {
  background: var(--color-bg-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  color: var(--color-text-muted);
}

.difficulty {
  font-weight: 600;
}

.difficulty.easy { color: var(--color-success); }
.difficulty.medium { color: var(--color-warning); }
.difficulty.hard { color: var(--color-danger); }

/* ---------- Exercise player ---------- */
.session-active {
  user-select: none;
  -webkit-user-select: none;
}

.session-top {
  margin-bottom: var(--space-4);
}

.session-progress-wrap {
  margin-bottom: var(--space-3);
}

.session-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  border-radius: 999px;
  transition: width 0.4s var(--ease);
}

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

.speed-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.segmented {
  display: inline-flex;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--color-border);
}

.seg-btn {
  padding: 0.4rem 0.75rem;
  border-radius: 7px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  min-height: 36px;
}

.seg-btn.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.exercise-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.animation-stage {
  position: relative;
  /* الرسومات الطبية تُعرض على خلفية بيضاء دائمًا حتى في الوضع الداكن */
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  height: min(300px, 62vw);
  display: grid;
  place-items: center;
  margin: var(--space-4) 0;
  overflow: hidden;
}

.animation-stage svg.exercise-svg {
  width: min(290px, 94%);
  height: min(290px, 96%);
}

.animation-stage.playing .anim-target {
  animation-play-state: running;
}

.animation-stage:not(.playing) .anim-target {
  animation-play-state: paused;
}

.preview-mode .anim-target {
  animation-play-state: running !important;
}

.timer-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-5) 0;
}

.timer-ring {
  position: relative;
  width: 140px;
  height: 140px;
}

.timer-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 8;
}

.ring-fg {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: var(--ring-circumference);
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.25s linear;
}

.timer-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.timer-display {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  transition: transform 0.2s, color 0.2s;
}

.timer-display.urgent {
  color: var(--color-warning);
  transform: scale(1.15);
  animation: pulseUrgent 0.6s ease infinite;
}

.timer-unit {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.rep-counter {
  text-align: center;
}

.rep-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.rep-display {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.controls .btn-primary,
.controls .btn-secondary {
  grid-column: span 1;
}

.instructions-details {
  margin: var(--space-4) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
}

.instructions-details summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-1);
}

.instructions-details[open] summary {
  margin-bottom: var(--space-3);
}

/* Rest screen */
.rest-screen .rest-card {
  background: var(--color-bg-soft);
  text-align: center;
  border-color: transparent;
}

.rest-hint {
  color: var(--color-text-muted);
}

.rest-timer {
  font-size: clamp(3.5rem, 15vw, 5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin: var(--space-5) 0;
}

.preview-svg {
  height: 100px;
  display: grid;
  place-items: center;
  margin: var(--space-3) auto var(--space-5);
}

.preview-svg svg {
  width: 90px;
  height: 90px;
}

.skipped-notice {
  text-align: center;
  padding: var(--space-6) var(--space-4);
}

.skipped-notice h3 {
  color: var(--color-warning);
}

/* ---------- Animations (SVG exercise motions) ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseUrgent {
  0%, 100% { transform: scale(1.12); }
  50% { transform: scale(1.22); }
}

/* التمرين ١: الإبهام يمر على رؤوس الأصابع بالتتابع مع عودة جزئية بينها */
@keyframes oppThumb {
  0%, 6% { transform: rotate(0deg); }
  15%, 19% { transform: rotate(-40deg); }
  27% { transform: rotate(-18deg); }
  35%, 39% { transform: rotate(-60deg); }
  47% { transform: rotate(-36deg); }
  55%, 59% { transform: rotate(-80deg); }
  67% { transform: rotate(-52deg); }
  75%, 81% { transform: rotate(-100deg); }
  92% { transform: rotate(-30deg); }
  100% { transform: rotate(0deg); }
}

/* توهج نقاط التلامس متزامن مع لحظة وصول الإبهام لكل إصبع */
@keyframes oppGlow1 { 0%, 10%, 24%, 100% { opacity: 0.15; } 15%, 19% { opacity: 1; } }
@keyframes oppGlow2 { 0%, 30%, 44%, 100% { opacity: 0.15; } 35%, 39% { opacity: 1; } }
@keyframes oppGlow3 { 0%, 50%, 64%, 100% { opacity: 0.15; } 55%, 59% { opacity: 1; } }
@keyframes oppGlow4 { 0%, 70%, 88%, 100% { opacity: 0.15; } 75%, 81% { opacity: 1; } }

/* صعود ثانيتين، ثبات قصير، نزول ٣ ثوانٍ */
@keyframes flexHand {
  0% { transform: rotate(0deg); }
  35%, 45% { transform: rotate(-50deg); }
  90%, 100% { transform: rotate(0deg); }
}

/* مدى قصير ١٥–٢٠ درجة فقط */
@keyframes radialHand {
  0% { transform: rotate(0deg); }
  35%, 45% { transform: rotate(-18deg); }
  88%, 100% { transform: rotate(0deg); }
}

/* بسط الرسغ مع ثبات ثانية في الأعلى */
@keyframes extHand {
  0% { transform: rotate(0deg); }
  30%, 47% { transform: rotate(-40deg); }
  90%, 100% { transform: rotate(0deg); }
}

/* تكراران داخل الدورة: صحيح ثم خاطئ (مع رفع الكتف) */
@keyframes curlHand {
  0% { transform: rotate(0deg); }
  10%, 16% { transform: rotate(-30deg); }
  28%, 50% { transform: rotate(0deg); }
  58%, 64% { transform: rotate(-30deg); }
  76%, 100% { transform: rotate(0deg); }
}

@keyframes shrugWrong {
  0%, 48%, 82%, 100% { transform: translateY(0); }
  55%, 72% { transform: translateY(-8px); }
}

@keyframes wrongMark {
  0%, 50%, 80%, 100% { opacity: 0; }
  56%, 72% { opacity: 1; }
}

@keyframes okMark {
  0%, 46% { opacity: 1; }
  52%, 78% { opacity: 0; }
  88%, 100% { opacity: 1; }
}

/* كل إصبع يدور حول قاعدته بزاوية مختلفة، مع ثبات ثانية عند الفتح */
@keyframes fsSpreadF1 {
  0%, 8% { transform: rotate(0deg); }
  40%, 55% { transform: rotate(9deg); }
  92%, 100% { transform: rotate(0deg); }
}

@keyframes fsSpreadF2 {
  0%, 8% { transform: rotate(0deg); }
  40%, 55% { transform: rotate(-2deg); }
  92%, 100% { transform: rotate(0deg); }
}

@keyframes fsSpreadF3 {
  0%, 8% { transform: rotate(0deg); }
  40%, 55% { transform: rotate(-8deg); }
  92%, 100% { transform: rotate(0deg); }
}

@keyframes fsSpreadF4 {
  0%, 8% { transform: rotate(0deg); }
  40%, 55% { transform: rotate(-15deg); }
  92%, 100% { transform: rotate(0deg); }
}

@keyframes fsThumb {
  0%, 8% { transform: rotate(0deg); }
  40%, 55% { transform: rotate(18deg); }
  92%, 100% { transform: rotate(0deg); }
}

/* الرباط يتمدد أفقيًا ويرقّ (stroke-width) كرباط حقيقي */
@keyframes fsBand {
  0%, 8% { transform: scale(1, 1); stroke-width: 4.5; }
  40%, 55% { transform: scale(1.2, 0.92); stroke-width: 3.2; }
  92%, 100% { transform: scale(1, 1); stroke-width: 4.5; }
}

/* تدفق الأسهم المتقطعة باتجاه الحركة */
@keyframes dashFlow {
  to { stroke-dashoffset: -26; }
}

.anim-thumb-opp {
  transform-origin: 148px 166px;
  animation: oppThumb calc(7.5s / var(--anim-speed)) ease-in-out infinite;
}

.opp-glow-1 { animation: oppGlow1 calc(7.5s / var(--anim-speed)) linear infinite; }
.opp-glow-2 { animation: oppGlow2 calc(7.5s / var(--anim-speed)) linear infinite; }
.opp-glow-3 { animation: oppGlow3 calc(7.5s / var(--anim-speed)) linear infinite; }
.opp-glow-4 { animation: oppGlow4 calc(7.5s / var(--anim-speed)) linear infinite; }

.anim-flex-hand {
  transform-origin: 142px 134px;
  animation: flexHand calc(6s / var(--anim-speed)) ease-in-out infinite;
}

.anim-radial-hand {
  transform-origin: 136px 142px;
  animation: radialHand calc(6s / var(--anim-speed)) ease-in-out infinite;
}

.anim-ext-hand {
  transform-origin: 142px 134px;
  animation: extHand calc(6s / var(--anim-speed)) ease-in-out infinite;
}

.anim-curl-hand {
  transform-origin: 148px 121px;
  animation: curlHand calc(12s / var(--anim-speed)) ease-in-out infinite;
}

.anim-shrug { animation: shrugWrong calc(12s / var(--anim-speed)) ease-in-out infinite; }
.anim-wrong-mark { animation: wrongMark calc(12s / var(--anim-speed)) linear infinite; }
.anim-ok-mark { animation: okMark calc(12s / var(--anim-speed)) linear infinite; }

.fs-f1 {
  transform-origin: 142px 130px;
  animation: fsSpreadF1 calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.fs-f2 {
  transform-origin: 118px 130px;
  animation: fsSpreadF2 calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.fs-f3 {
  transform-origin: 94px 130px;
  animation: fsSpreadF3 calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.fs-f4 {
  transform-origin: 72px 130px;
  animation: fsSpreadF4 calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.fs-thumb {
  transform-origin: 152px 152px;
  animation: fsThumb calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.fs-band {
  transform-origin: 118px 103px;
  animation: fsBand calc(5.5s / var(--anim-speed)) ease-in-out infinite;
}

.arrow-dash {
  stroke-dasharray: 7 6;
  animation: dashFlow calc(1.4s / var(--anim-speed)) linear infinite;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .controls {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .pain-options {
    grid-template-columns: repeat(2, 1fr);
  }

  .library-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .animation-stage {
    height: 300px;
  }
}

@media (min-width: 900px) {
  .main {
    padding-top: var(--space-6);
  }

  .library-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Dark mode extras ---------- */
[data-theme="dark"] .rest-screen .rest-card,
:root:not([data-theme="light"]) .rest-screen .rest-card {
  background: var(--color-surface);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .screen {
    animation: none;
  }

  .anim-target {
    animation: none !important;
  }

  .timer-display.urgent {
    animation: none;
    transform: scale(1.1);
  }

  .progress-fill {
    transition: none;
  }

  body.reduced-motion-hint .animation-stage::after {
    content: "وضع تقليل الحركة مفعّل — الحركة ثابتة للتوضيح";
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 0.7rem;
    color: var(--color-text-muted);
  }
}

body.reduce-motion .anim-target {
  animation: none !important;
}