/* ==========================================================================
   منصة أروى التعليمية - تنسيقات المنصة الرئيسية والبطاقات والتنقل (Platform CSS)
   الهوية: Study Buddy — Teen Edition
   لوحة الألوان: Soft Cream, Dusty Blue, Deep Navy, Warm Beige, Soft Orange
   ========================================================================== */

@import url("variables.css");
@import url("base.css");
@import url("components.css");

/* ── 1. الهيدر وشريط التنقل (Header & Nav) ── */
.main-header {
  background-color: rgba(255, 253, 249, 0.95);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-card);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 0;
  box-shadow: var(--shadow-subtle);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--dusty-blue);
  box-shadow: 0 2px 8px var(--dusty-blue-glow);
  transition: transform var(--transition-normal);
}

.logo:hover .logo-img {
  transform: rotate(-5deg) scale(1.05);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--deep-navy);
  letter-spacing: 0.5px;
}

header nav,
.site-nav,
.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--cream-light);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--beige-mid);
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  color: var(--navy-light);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--deep-navy);
  background-color: var(--dusty-blue-light);
}

.nav-link.active {
  color: var(--pure-white);
  background-color: var(--dusty-blue);
  box-shadow: 0 2px 8px var(--dusty-blue-glow);
}

/* ── 2. واجهة الهيرو (Hero Section) ── */
.hero {
  text-align: center;
  padding: 60px 20px 40px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 20%, rgba(235, 241, 246, 0.95) 0%, rgba(248, 243, 234, 0.6) 80%);
  border-bottom: 1px solid var(--border-card);
  margin-bottom: 20px;
}

.hero-compact {
  padding: 45px 20px 30px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.2;
}

.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--navy-light);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.8;
}

/* Floating Particles */
.particles-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--dusty-blue);
  opacity: 0.25;
  pointer-events: none;
}

/* ── 3. تبويبات التصفح (Browse Tabs) ── */
.browse-tabs {
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 20px 0;
  margin-bottom: 10px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  font-family: var(--font-family);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy-light);
  background: var(--white);
  border: 1.5px solid var(--border-card);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.tab-btn:hover {
  color: var(--deep-navy);
  border-color: var(--dusty-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tab-btn.active {
  color: var(--pure-white);
  background: var(--dusty-blue);
  border-color: var(--dusty-blue);
  box-shadow: 0 6px 18px var(--dusty-blue-glow);
}

.tab-btn i {
  font-size: 1.2rem;
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
}

.tab-content.active {
  display: block;
}

/* ── 4. شبكة البطاقات (Cards & Grid Layout) ── */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  padding: 20px 0 40px;
}

.grid-container.grade-menu-center {
  grid-template-columns: repeat(2, minmax(300px, 1fr));
  max-width: 960px;
  margin: 0 auto;
}

.grid-container.grade-menu-center .card.wide {
  grid-column: 1 / -1;
  max-width: 100%;
}

.group-title {
  grid-column: 1 / -1;
  width: 100%;
  text-align: right;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin: 24px 0 8px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--beige-mid);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── 5. تصميم البطاقة الموحد (Card Design) ── */
.card,
.grade-card {
  background: var(--white);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.card:hover,
.grade-card:hover {
  transform: translateY(-6px);
  border-color: var(--dusty-blue-border);
  box-shadow: var(--shadow-card-hover);
}

.card .icon,
.grade-card .icon {
  font-size: 3rem;
  margin-bottom: 18px;
  width: 86px;
  height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--cream-light);
  border: 1px solid var(--beige-mid);
  color: var(--dusty-blue-dark);
  box-shadow: inset 0 0 12px rgba(232, 220, 203, 0.6);
  transition: all var(--transition-normal);
}

.card:hover .icon,
.grade-card:hover .icon {
  transform: scale(1.1) rotate(5deg);
  background: var(--dusty-blue-light);
  border-color: var(--dusty-blue);
  color: var(--dusty-blue-dark);
  box-shadow: 0 0 20px var(--dusty-blue-glow);
}

.card h3,
.grade-card h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin-bottom: 10px;
}

.card p,
.grade-card p {
  color: var(--navy-muted);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 14px;
  flex: 1;
}

/* ── 6. أزرار إجراءات الصفوف (Grade Action Buttons) ── */
.grade-actions {
  display: flex;
  margin-top: 14px;
  gap: 12px;
  width: 100%;
  align-items: center;
  justify-content: center;
}

.card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--dusty-blue);
  color: var(--pure-white);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  min-width: 110px;
  box-shadow: 0 4px 12px var(--dusty-blue-glow);
  transition: all var(--transition-fast);
}

.card-btn:hover {
  background: var(--dusty-blue-hover);
  color: var(--pure-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(127, 155, 181, 0.4);
}

.card-btn .btn-icon {
  font-size: 1.15rem;
}

.coming-soon-badge {
  display: inline-block;
  margin-top: 14px;
  padding: 8px 24px;
  background: var(--beige-light);
  color: var(--navy-muted);
  border: 1px solid var(--beige-mid);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
}

/* ── 7. بطاقة قسم بنت الشيمي الخاصة في الرئيسية ── */
.card.bint-special-card {
  border-color: var(--dusty-blue-border);
  background: linear-gradient(135deg, var(--white) 0%, rgba(235, 241, 246, 0.7) 100%);
  box-shadow: var(--shadow-md);
}

.card.bint-special-card:hover {
  border-color: var(--dusty-blue);
  box-shadow: 0 14px 36px rgba(127, 155, 181, 0.25);
}

/* ── 8. بطاقات تصفح المواد (Subject Cards Grid) ── */
.subjects-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  max-width: 1200px;
  margin: 0 auto;
}

.subject-card {
  background: var(--white);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.subject-card:hover {
  transform: translateY(-6px);
  border-color: var(--dusty-blue);
  box-shadow: var(--shadow-card-hover);
}

.subject-card .icon {
  font-size: 2.8rem;
  margin-bottom: 16px;
  width: 76px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--cream-light);
  border: 1px solid var(--beige-mid);
  color: var(--dusty-blue-dark);
  transition: all var(--transition-fast);
}

.subject-card:hover .icon {
  background: var(--dusty-blue-light);
  transform: scale(1.1);
}

.subject-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin-bottom: 8px;
}

.subject-card p {
  color: var(--navy-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.subject-card .grades-badge {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: auto;
}

.subject-card .grade-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--dusty-blue-light);
  border: 1px solid var(--dusty-blue-border);
  border-radius: var(--radius-full);
  color: var(--dusty-blue-dark);
  font-weight: 700;
}

/* ── 9. صفحة تفاصيل المادة والدروس (Subject Content Page) ── */
.subject-hero {
  margin: 30px 0 40px;
  text-align: center;
  padding: 36px 20px;
  background: var(--white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-sm);
}

.subject-hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin-bottom: 10px;
}

.subject-hero p {
  font-size: 1.15rem;
  color: var(--navy-light);
  max-width: 700px;
  margin: 0 auto;
}

.grade-section {
  margin-bottom: 40px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-subtle);
}

.grade-section-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--beige-mid);
  display: flex;
  align-items: center;
  gap: 10px;
}

.term-title, .section-title {
  color: var(--deep-navy);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 24px 0 16px;
  padding-bottom: 6px;
  border-bottom: 1.5px solid var(--beige-light);
}

.lesson-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.lesson-item {
  background: var(--cream-light);
  border: 1px solid var(--beige-mid);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-subtle);
  transition: all var(--transition-fast);
}

.lesson-item:hover {
  background: var(--white);
  border-color: var(--dusty-blue);
  transform: translateX(-4px);
  box-shadow: var(--shadow-sm);
}

.lesson-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--deep-navy);
}

.btn-start {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background: var(--dusty-blue);
  color: var(--pure-white);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px var(--dusty-blue-glow);
}

.btn-start:hover {
  background: var(--dusty-blue-hover);
  color: var(--pure-white);
  transform: scale(1.05);
}

/* ── 10. التذييل (Footer) ── */
footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid var(--border-card);
  color: var(--navy-muted);
  background: var(--white);
  margin-top: 60px;
  font-size: 0.95rem;
}

/* ── 11. التجاوب مع مختلف الشاشات (Responsive) ── */
@media (max-width: 768px) {
  .grid-container.grade-menu-center {
    grid-template-columns: 1fr;
    max-width: 500px;
  }

  .grid-container.grade-menu-center .card.wide {
    grid-column: auto;
  }

  .grade-actions {
    flex-direction: column;
  }

  .card-btn {
    width: 100%;
  }

  .lesson-item {
    flex-direction: column;
    text-align: center;
  }

  .btn-start {
    width: 100%;
  }

  .browse-tabs {
    flex-direction: column;
    align-items: center;
  }

  .tab-btn {
    width: 100%;
    max-width: 320px;
  }
}