@property --fade-start {
  syntax: "<length>";
  inherits: false;
  initial-value: 0px;
}

@property --fade-end {
  syntax: "<length>";
  inherits: false;
  initial-value: 0px;
}

:root {
  --bg-page: #F6F9FF;
  --surface: #FFFFFF;
  --text-main: #1E272E;
  --text-muted: #576574;
  --primary: #FF6B6B;
  --secondary: #48DBFB;
  --accent-purple: #5F27CD;
  --accent-green: #10AC84;
  --accent-yellow: #FECA57;
  --border-soft: #E2E8F0;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-card: 0 12px 28px rgba(30, 39, 46, 0.08);
  --font-kids: 'Cairo', 'Tajawal', 'Segoe UI', Tahoma, sans-serif;
}

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

body {
  font-family: var(--font-kids);
  background: radial-gradient(circle at top right, #FFF8E7 0%, #F0F7FF 55%, #F5F0FF 100%);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* شريط الرأس العلوي */
.site-header {
  background: var(--surface);
  border-block-end: 3px solid var(--border-soft);
  padding: 0.85rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  font-size: 2.3rem;
  background: #FFF3E0;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  border: 2px solid #FFB74D;
}

.brand-area h1 {
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  font-weight: 800;
  color: var(--accent-purple);
}

.brand-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.header-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.star-counter {
  background: #FFF9C4;
  border: 2px solid #FBC02D;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-weight: 800;
  font-size: 1.1rem;
  color: #B26A00;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.pulse-star {
  animation: popStar 0.55s cubic-bezier(0.2, 0.8, 0.3, 1.4);
}

@keyframes popStar {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.28); }
}

.pill-btn {
  border: 2px solid var(--border-soft);
  background: var(--surface);
  color: var(--text-main);
  padding: 0.48rem 1rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: transform 0.15s ease, border-color 0.2s ease, background 0.2s ease;
}

.pill-btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent-purple);
}

.pill-btn[aria-pressed="true"] {
  background: #EDE7F6;
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}

/* الحاوية الرئيسية */
.app-main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

/* اختيار المستوى اللغوي (كلمة / كلمتين / 3 كلمات) */
.level-selector-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-card);
  margin-block-end: 1.1rem;
  border: 2px solid #E8EEFF;
}

.level-selector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-end: 0.85rem;
}

.level-selector-header h2 {
  font-size: 1.15rem;
  color: var(--text-main);
}

.level-buttons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
}

.level-btn {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-md);
  border: 3px solid var(--border-soft);
  background: #FAFCFF;
  text-align: start;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.level-btn:hover {
  transform: translateY(-2px);
}

.level-btn[aria-pressed="true"] {
  border-color: var(--level-accent, var(--accent-purple));
  background: var(--level-bg, #F3E5F5);
  box-shadow: 0 6px 16px rgba(95, 39, 205, 0.14);
}

.level-badge-num {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--level-accent, var(--accent-purple));
  color: #FFFFFF;
  font-weight: 900;
  font-size: 1.25rem;
  display: grid;
  place-items: center;
  flex: none;
}

.level-btn-title {
  display: block;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
}

.level-btn-desc {
  display: block;
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* شريط الفئات */
.category-bar {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  padding-block: 0.4rem 0.9rem;
  scrollbar-width: thin;
}

.category-chip {
  flex: none;
  border: 2px solid var(--border-soft);
  background: var(--surface);
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: transform 0.15s ease, background 0.2s ease;
}

.category-chip[aria-pressed="true"] {
  border-color: var(--chip-color, var(--primary));
  background: var(--chip-color, var(--primary));
  color: #FFFFFF;
}

/* التبويبات القياسية وفق Modern Web Guidance */
.activity-tabs-bar {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  background: var(--surface);
  padding: 0.5rem 0.75rem 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border: 2px solid var(--border-soft);
  border-block-end: none;
}

[role="tab"] {
  flex: none;
  position: relative;
  border: none;
  background: transparent;
  padding: 0.85rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-muted);
  border-radius: 14px 14px 0 0;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

[role="tab"]:hover {
  color: var(--text-main);
  background: #F8FAFC;
}

[role="tab"][aria-selected="true"] {
  color: var(--accent-purple);
  background: #F5F0FF;
}

[role="tab"][aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  border-block-end: 4px solid var(--accent-purple);
}

.tab-panels-stack {
  display: grid;
}

[role="tabpanel"] {
  grid-area: 1 / 1;
}

.panel-inner {
  background: var(--surface);
  border: 2px solid var(--border-soft);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

/* المسرح الرئيسي للبطاقة التفاعلية (صورة + مجسم 3D + نطق) */
.showcase-card {
  background: var(--card-bg, #FFF8E7);
  border: 4px solid var(--card-accent, #FF9F43);
  border-radius: var(--radius-xl);
  padding: 1.35rem;
  margin-block-end: 1.8rem;
  position: relative;
}

.showcase-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-end: 1rem;
}

.view-mode-switcher {
  display: inline-flex;
  background: var(--surface);
  padding: 0.28rem;
  border-radius: 999px;
  border: 2px solid var(--border-soft);
  gap: 0.25rem;
}

.view-mode-btn {
  border: 2px solid transparent;
  background: transparent;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 700;
}

.view-mode-btn[aria-pressed="true"] {
  background: var(--accent-purple);
  color: #FFFFFF;
}

/* شبكة العرض المزدوج: الصورة التوضيحية + المجسم ثلاثي الأبعاد */
.showcase-media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.25rem;
  align-items: stretch;
  margin-block-end: 1.25rem;
}

.showcase-media-grid[data-mode="2d"] .media-box-3d {
  display: none;
}

.showcase-media-grid[data-mode="3d"] .media-box-2d {
  display: none;
}

.media-box {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 3px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  min-height: 295px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
}

.media-box-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-block-end: 0.5rem;
}

.illust-stage {
  width: 100%;
  max-width: 260px;
  height: 210px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.illust-stage:hover {
  transform: scale(1.04);
}

.illust-svg {
  width: 100%;
  height: 100%;
  max-height: 205px;
}

.custom-card-img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  border-radius: 14px;
}

.viewer-3d-canvas {
  width: 100%;
  height: 215px;
  border-radius: 16px;
  background: radial-gradient(circle at center, #FFFFFF 0%, #EDF4FF 100%);
  cursor: grab;
  position: relative;
  overflow: hidden;
  touch-action: none;
}

.viewer-3d-canvas:active {
  cursor: grabbing;
}

.media-box-footer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-block-start: 0.5rem;
}

.mini-tool-btn {
  border: 2px solid var(--border-soft);
  background: #F8FAFC;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.mini-tool-btn:hover {
  border-color: var(--accent-purple);
}

/* منطقة الكلمة والمقاطع الصوتية وأزرار النطق */
.showcase-word-section {
  text-align: center;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 2px solid rgba(0, 0, 0, 0.05);
}

.word-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-block-end: 0.6rem;
}

.nav-arrow-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 3px solid var(--border-soft);
  background: var(--surface);
  font-size: 1.35rem;
  font-weight: 900;
  display: grid;
  place-items: center;
  transition: transform 0.15s ease, background 0.15s ease;
}

.nav-arrow-btn:hover {
  background: var(--card-accent, var(--primary));
  color: #FFFFFF;
  border-color: transparent;
  transform: scale(1.08);
}

.showcase-word-title {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.showcase-hint-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-block-end: 1rem;
}

.word-parts-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-block-end: 1.25rem;
}

.syllable-chip,
.sentence-part-btn {
  border: 3px solid var(--card-accent, var(--accent-purple));
  background: #FFFFFF;
  padding: 0.55rem 1.15rem;
  border-radius: 16px;
  font-size: 1.25rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.18s ease, background 0.18s ease;
}

.syllable-chip:hover,
.sentence-part-btn:hover {
  transform: translateY(-3px);
}

.syl-badge,
.part-role {
  font-size: 0.76rem;
  background: #F1F5F9;
  color: var(--text-muted);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

.speaking-now {
  background: var(--accent-yellow) !important;
  transform: scale(1.12) !important;
  box-shadow: 0 8px 20px rgba(254, 202, 87, 0.5);
}

.audio-actions-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.action-btn {
  border: none;
  padding: 0.8rem 1.45rem;
  border-radius: 999px;
  font-size: 1.05rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.1);
  transition: transform 0.15s ease;
}

.action-btn:hover {
  transform: translateY(-2px);
}

.action-btn-primary {
  background: var(--accent-green);
  color: #FFFFFF;
  font-size: 1.15rem;
}

.action-btn-secondary {
  background: var(--accent-purple);
  color: #FFFFFF;
}

.action-btn-sound {
  background: #FF9F43;
  color: #FFFFFF;
}

/* شبكة بطاقات المفردات والجمل (Cards Grid with Container Queries) */
.cards-section-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-block-end: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.vocab-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1rem;
}

article.vocab-card {
  container-type: inline-size;
  background: var(--surface);
  border: 3px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

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

article.vocab-card.is-active {
  border-color: var(--card-accent, var(--primary));
  background: #FFFDF9;
  box-shadow: 0 0 0 3px rgba(255, 159, 67, 0.25);
}

article.vocab-card > .media {
  aspect-ratio: 4 / 3;
  width: 100%;
  display: grid;
  place-items: center;
}

article.vocab-card h3 {
  font-size: 1.3rem;
  text-align: center;
}

.card-select-btn {
  border: none;
  background: transparent;
  font-size: inherit;
  font-weight: 900;
  color: var(--text-main);
  width: 100%;
}

article.vocab-card > p {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

article.vocab-card > footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-start: auto;
  padding-block-start: 0.5rem;
  border-block-start: 1px dashed var(--border-soft);
}

.mini-speak-btn {
  border: none;
  background: #E8F5E9;
  color: #10AC84;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.84rem;
}

.badge-3d {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-purple);
  background: #EDE7F6;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

/* الألعاب التفاعلية (اسمع واختار + انطق معايا + كوّن الجملة) */
.game-stage-box {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.game-header-banner {
  background: #F0F7FF;
  border: 3px solid #B3E5FC;
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-block-end: 1.25rem;
}

.game-prompt-title {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  font-weight: 900;
  color: var(--accent-purple);
  margin-block-end: 0.65rem;
}

.game-feedback {
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: #F8FAFC;
  color: var(--text-main);
  margin-block: 0.85rem;
}

.feedback-success {
  background: #E8F5E9;
  color: #0B8457;
  border: 2px solid #10AC84;
}

.feedback-retry {
  background: #FFF3E0;
  color: #D84315;
  border: 2px solid #FF9F43;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
  gap: 1.1rem;
  margin-block-top: 1rem;
}

.quiz-choice-card {
  background: var(--surface);
  border: 4px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.quiz-choice-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-accent, var(--accent-purple));
}

.quiz-choice-card.correct-choice {
  border-color: #10AC84;
  background: #E8F5E9;
  transform: scale(1.05);
}

.quiz-choice-card.wrong-choice {
  border-color: #EE5253;
  background: #FFEBEE;
  opacity: 0.7;
}

.quiz-illust {
  width: 140px;
  height: 120px;
}

.quiz-card-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-main);
}

/* لعبة انطق معايا */
.speak-card-preview {
  background: #FFFDF7;
  border: 3px solid #FFE082;
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  max-width: 480px;
  margin: 0 auto 1.2rem;
}

.speak-illust-box {
  width: 200px;
  height: 170px;
  margin: 0 auto;
}

.speak-segments-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-block-top: 0.75rem;
}

.speak-segment-pill {
  background: #EDE7F6;
  color: var(--accent-purple);
  font-weight: 800;
  font-size: 1.2rem;
  padding: 0.35rem 1rem;
  border-radius: 999px;
}

.voice-meter-track {
  max-width: 360px;
  height: 20px;
  background: #E2E8F0;
  border-radius: 999px;
  margin: 1rem auto;
  overflow: hidden;
  border: 2px solid #CBD5E1;
}

.voice-meter-fill {
  height: 100%;
  width: var(--meter-level, 0%);
  background: linear-gradient(90deg, #10AC84, #FECA57, #FF6B6B);
  transition: width 0.08s linear;
}

.recording-active {
  background: #EE5253 !important;
  color: #FFFFFF !important;
  animation: pulseRec 1s infinite alternate;
}

@keyframes pulseRec {
  from { box-shadow: 0 0 0 0 rgba(238, 82, 83, 0.5); }
  to { box-shadow: 0 0 0 14px rgba(238, 82, 83, 0); }
}

/* لعبة كوّن الجملة */
.builder-slots-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-block: 1.2rem;
}

.builder-slot {
  min-width: 145px;
  min-height: 76px;
  border: 3px dashed #94A3B8;
  border-radius: var(--radius-md);
  background: #F8FAFC;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  font-size: 1.2rem;
  color: var(--text-muted);
}

.builder-slot.filled {
  border-style: solid;
  border-color: var(--accent-green);
  background: #E8F5E9;
  color: var(--text-main);
  font-size: 1.35rem;
}

.builder-choices-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-block-top: 1rem;
}

.builder-word-card {
  border: 3px solid var(--accent-purple);
  background: var(--surface);
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 1.35rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  box-shadow: 0 6px 14px rgba(95, 39, 205, 0.1);
}

.builder-word-card:disabled {
  opacity: 0.35;
  cursor: default;
}

/* النوافذ الحوارية القياسية (<dialog>) */
dialog.app-dialog {
  margin: auto;
  border: 3px solid var(--accent-purple);
  border-radius: var(--radius-xl);
  padding: 1.6rem;
  max-width: 540px;
  width: calc(100% - 2rem);
  background: var(--surface);
  color: var(--text-main);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.22);
}

dialog.app-dialog::backdrop {
  background: rgba(30, 39, 46, 0.55);
  backdrop-filter: blur(4px);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-end: 1rem;
}

.dialog-list {
  padding-inline-start: 1.25rem;
  display: grid;
  gap: 0.6rem;
  margin-block-end: 1.25rem;
}

/* طبقة الاحتفال بالنجوم */
.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 99;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -40px;
  left: var(--x-pos, 50%);
  font-size: 2rem;
  animation: confettiFall 1.6s ease-in forwards;
  animation-delay: var(--fall-delay, 0s);
}

@keyframes confettiFall {
  to {
    transform: translateY(105vh) rotate(340deg);
    opacity: 0;
  }
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  border-block-start: 2px solid var(--border-soft);
  background: var(--surface);
}