/* ==========================================================================
   Oxford Academic Portal - Unified Master Stylesheet (Sticky Flow Solution)
   ========================================================================== */

:root {
  --oxford-frame-max: 1240px;       /* العرض القياسي الموحد للإطار والهيدر */
  --oxford-blue: #002147;
  --oxford-blue-dark: #00132b;
  --oxford-gold: #b8860b;
  --oxford-gold-light: #d4af37;
  --bg-screen-outer: #e6eaf0;       /* لون الخلفية المحيطة بالإطار على الحاسوب */
  --bg-inner-paper: #faf9f6;        /* لون خلفية الصفحات الداخلي الكريمي */
  --frame-border: #cbd5e1;
}

/* ==========================================================================
   1. تحسينات التجربة البصرية والمقروئية
   ========================================================================== */
html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-screen-outer) !important;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

::selection {
  background-color: rgba(184, 134, 11, 0.22);
  color: var(--oxford-blue-dark);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--oxford-blue-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--oxford-gold);
  border-radius: 5px;
  border: 2px solid var(--oxford-blue-dark);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--oxford-gold-light);
}

/* ==========================================================================
   2. الإطار الحاوي الموحد للموقع (Boxed Frame Layout)
   ========================================================================== */
.page-wrapper {
  width: 100%;
  max-width: var(--oxford-frame-max) !important;
  margin-inline: auto !important;
  background-color: var(--bg-inner-paper);
  min-height: 100vh;
  position: relative;
  box-shadow: 0 0 35px rgba(0, 19, 43, 0.14);
  border-inline: 1px solid var(--frame-border);
  box-sizing: border-box;
}

/* إلغاء أي تأثير سلبي في حال تكرر وسم page-wrapper داخل نفسه */
.page-wrapper .page-wrapper {
  border: none !important;
  box-shadow: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* ==========================================================================
   3. الحل الجذري للهيدر والمسافات: تحويل الهيدر إلى Sticky
   ========================================================================== */
.main-sticky-holder {
  position: sticky !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  transform: none !important;
  width: 100% !important;
  max-width: 100% !important;
  z-index: 9999;
  box-sizing: border-box;
}

/* تصفير الحشوة التعويضية القديمة لأن الهيدر أصبح يحجز مكانه الطبيعي تلقائياً */
:root {
  --header-height: 0px !important;
}

.hero {
  padding-top: clamp(2.5rem, 4vw, 3.5rem) !important;
}

/* إزالة كافة الفراغات البيضاء الزائدة من الصفحات الداخلية */
main,
#main-content,
.page-wrapper > main,
.page-wrapper > #main-content {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

/* ضبط مسافة علوية مريحة وموزونة لأول قسم محتوى بعد البانر أو الهيدر */
main > .container:first-child,
#main-content > .container:first-child {
  padding-top: 2rem;
}

/* ==========================================================================
   4. تحسين البطاقات وعناصر الواجهة
   ========================================================================== */
.academic-card, .vision-card, .pub-card, .field-card, .init-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.academic-card:hover, .vision-card:hover, .field-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 33, 71, 0.09);
}

@media (min-width: 1300px) {
  #scrollTopBtn {
    left: calc(50% - (var(--oxford-frame-max) / 2) + 2rem) !important;
  }
}

/* ==========================================================================
   5. التجاوب الشامل مع الشاشات (Responsive Media Queries)
   ========================================================================== */
@media (min-width: 1280px) {
  body {
    padding-block: 1.5rem;
  }
  .page-wrapper {
    border-radius: 6px;
    border: 1px solid var(--frame-border);
    min-height: calc(100vh - 3rem);
    overflow: clip; /* يدعم sticky مع الحفاظ على حواف الإطار الدائرية */
  }
}

@media (max-width: 1240px) {
  body {
    padding: 0 !important;
    background-color: var(--bg-inner-paper) !important;
  }
  .page-wrapper {
    max-width: 100% !important;
    border: none !important;
    box-shadow: none !important;
  }
}

/* ==========================================================================
   6. نمط الطباعة الأكاديمية (Print Friendly Mode)
   ========================================================================== */
@media print {
  body, .page-wrapper {
    background: #ffffff !important;
    color: #000000 !important;
    max-width: 100% !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .main-sticky-holder, 
  .presence-bar, 
  #scrollTopBtn, 
  #progressBar, 
  .btn-primary, 
  .btn-secondary,
  .hero-slider-dots {
    display: none !important;
  }
}