@import url("https://fonts.googleapis.com/css2?family=Cairo:wght@400;600;700;800&display=swap");

:root {
  --primary: #667eea;
  --primary-dark: #5568d3;
  --secondary: #764ba2;
  --accent: #f093fb;
  --background: #0f172a;
  --surface: #1e293b;
  --surface-light: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --border: #334155;
  --success: #10b981;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-card: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

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

body {
  font-family: "Cairo", sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navbar */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

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

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
}

.brand-name a {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
  padding: 0.5rem 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* Search Box */
.search-box {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s;
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.search-input {
  flex: 1;
  padding: 1rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: "Cairo", sans-serif;
  outline: none;
}

.search-input::placeholder {
  color: var(--text-secondary);
}

.search-btn {
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  border: none;
  color: white;
  font-size: 1rem;
  font-weight: 700;
  font-family: "Cairo", sans-serif;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
}

.search-btn:hover {
  background: linear-gradient(135deg, #5568d3 0%, #6540a2 100%);
}

/* Courses Section */
.courses-section {
  padding: 3rem 0 4rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Courses Grid */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.course-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2rem;
  transition: all 0.3s;
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.course-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.course-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.course-info {
  flex: 1;
}

.course-code {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.course-name {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.course-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 0.75rem;
  background: var(--surface-light);
  border-radius: 0.75rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.stat-item svg {
  width: 16px;
  height: 16px;
  color: var(--primary);
}

/* === الأزرار (تصفح الملفات + تحميل) === */
.course-actions {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* زر تحميل */
.course-actions .download-btn {
  flex: 1;
  background: var(--surface-light);
  color: var(--text-primary);
  border: none;
  border-radius: 0.75rem;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
}

.course-actions .download-btn svg {
  width: 18px;
  height: 18px;
  stroke: var(--primary);
}

.course-actions .download-btn:hover {
  background: var(--surface);
  transform: translateY(-2px);
}

/* زر تصفح الملفات */
.course-actions .browse-btn {
  flex: 1;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 0.75rem;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.25);
}

.course-actions .browse-btn svg {
  width: 18px;
  height: 18px;
  stroke: #fff;
}

.course-actions .browse-btn:hover {
  background: linear-gradient(135deg, #5568d3 0%, #6540a2 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}


/* ===== Fix: Global Buttons (.btn) used in admin + course-files page ===== */
.btn {
  flex: 0 0 auto;
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: "Cairo", sans-serif;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #5568d3 0%, #6540a2 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}



/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
}

.footer p {
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }

  .search-box {
    flex-direction: column;
  }

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

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.course-card {
  animation: fadeIn 0.5s ease-out forwards;
}

.course-card:nth-child(1) {
  animation-delay: 0.1s;
}
.course-card:nth-child(2) {
  animation-delay: 0.2s;
}
.course-card:nth-child(3) {
  animation-delay: 0.3s;
}
.course-card:nth-child(4) {
  animation-delay: 0.4s;
}
.course-card:nth-child(5) {
  animation-delay: 0.5s;
}
.course-card:nth-child(6) {
  animation-delay: 0.6s;
}
/* ===== Select: remove native arrow completely ===== */
.form-group select{
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  background-image: none !important;   /* remove old custom arrow */
  padding-right: 3.25rem !important;   /* space for our arrow */
  position: relative;
}

/* ===== Custom arrow (single) ===== */
.form-group{
  position: relative;
}

.form-group select{
  background-color: var(--surface) !important;
}

.form-group select::ms-expand{
  display: none; /* old Edge/IE */
}


.form-group.has-select{
  position: relative;
}

.form-group.has-select::after{
  content: "";
  position: absolute;
  top: calc(50% + 14px);
  right: 1.25rem;
  width: 0;
  height: 0;
  pointer-events: none;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 9px solid var(--text-secondary);
  transform: translateY(-50%);
  opacity: 0.9;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 0.5rem;
  cursor: pointer;
}

/* تفعيل مظهر موبايل */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  /* Navbar */
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-menu {
    display: none;            /* نخفيها افتراضيًا */
    position: absolute;
    top: 70px;
    right: 1rem;
    left: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0.75rem;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 999;
  }

  .nav-menu.open {
    display: flex;            /* تظهر لما نضغط همبرجر */
  }

  .nav-link {
    padding: 0.75rem 0.75rem;
    border-radius: 10px;
  }

  .nav-link.active::after {
    display: none;            /* خط active تحت الرابط مو حلو للموبايل */
  }

  .nav-link.active {
    background: rgba(102, 126, 234, 0.12);
    color: var(--primary);
  }

  /* Hero */
  .hero-section {
    padding: 2.25rem 0 1.5rem;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }

  /* Search bar مثل الصورة: input + زر */
  .search-box {
    flex-direction: row;
    border-radius: 0.9rem;
  }

  .search-input {
    padding: 0.9rem 1rem;
    font-size: 0.95rem;
  }

  .search-btn {
    padding: 0.9rem 1rem;
    font-size: 0.9rem;
    white-space: nowrap;
  }

  /* Courses grid = عمود واحد */
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  /* الكرت أنحف */
  .course-card {
    padding: 1.25rem;
    border-radius: 1.25rem;
  }

  /* عنوان المادة بالوسط زي الصورة */
  .course-header {
    flex-direction: column;
    text-align: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
  }

  /* اخفِ الأيقونة الكبيرة (لو تبغى شكل زي الصورة تمامًا) */
  .course-icon {
    display: none;
  }

  .course-code {
    font-size: 1.3rem;
  }

  .course-name {
    font-size: 0.95rem;
  }

  /* stats وسط */
  .course-stats {
    justify-content: center;
    margin-bottom: 1rem;
  }

  /* الأزرار جنب بعض (مو تحت بعض) */
  .course-actions {
    flex-direction: row !important;
    gap: 0.75rem;
  }

  .btn,
  .course-actions .browse-btn,
  .course-actions .download-btn {
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    border-radius: 0.9rem;
  }
}
.course-card{
  scroll-margin-top: 120px;
}

.course-card.search-hit{
  outline: 2px solid var(--primary);
  box-shadow: 0 0 0 6px rgba(0,0,0,.15);
  transform: translateY(-2px);
  transition: .2s;
}


/* موبايل صغير جدًا */
@media (max-width: 420px) {
  .search-btn span {
    display: none; /* لو الزر طويل عندك */
  }

  .course-code {
    font-size: 1.2rem;
  }

  .btn,
  .course-actions .browse-btn,
  .course-actions .download-btn {
    font-size: 0.9rem;
    padding: 0.8rem 0.9rem;
  }
}

.site-footer{
  margin-top: 3rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(10px);
  text-align: center;
}

.footer-credit{
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .2px;
  opacity: .9;
  transition: .2s;
}

.footer-credit:hover{
  color: var(--primary);
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}