/* =====================================================================
   Double H — نظام التصميم المشترك (ورق الرسم الهندسي)
   كل الأقسام والصفحات الجاية بتعتمد على هالمتغيرات والمكونات.
   الكلاسات بتبلش بـ ds-
   ===================================================================== */

:root {
  /* الألوان */
  --dh-ink: #0e2b2b;          /* ورقة المخطط الغامقة */
  --dh-teal: #143939;         /* brand-primary */
  --dh-teal-600: #1f5252;
  --dh-teal-100: #d9ebeb;
  --dh-teal-50: #f1f7f7;
  --dh-gold: #d9a93f;         /* DhCoins */
  --dh-gold-600: #b48722;
  --dh-gold-light: #f2d27f;
  --dh-paper: #ffffff;
  --dh-text: #0f1f1f;
  --dh-muted: #5a6b6b;
  --dh-line: rgba(20, 57, 57, 0.1);
  --dh-line-2: rgba(20, 57, 57, 0.22);

  /* الخطوط */
  --dh-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* الحركة */
  --dh-ease: cubic-bezier(0.2, 0.7, 0, 1);
  --dh-ease-io: cubic-bezier(0.65, 0, 0.35, 1);

  /* ارتفاع النافبار (للـ scroll-margin) */
  --dh-nav-space: 6rem;
}

[id] { scroll-margin-top: var(--dh-nav-space); }

/* ---------- ورق الرسم: شبكة ناعمة ---------- */
.ds-paper {
  position: relative;
  background-color: var(--dh-paper);
}
.ds-paper::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--dh-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--dh-line) 1px, transparent 1px),
    linear-gradient(rgba(20, 57, 57, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 57, 57, 0.035) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  background-position: center top;
  opacity: 0.55;
}
.ds-paper > * { position: relative; }

/* ---------- عنوان القسم ---------- */
.ds-head {
  max-width: 46rem;
  margin-inline: auto;
  margin-bottom: clamp(3rem, 6vw, 4.5rem);
  text-align: center;
}
.ds-head--start { margin-inline: 0; text-align: start; }

/* رقم اللوحة: A-01 · الدورات */
.ds-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 0.85rem 0.4rem 0.75rem;
  border: 1px solid var(--dh-line-2);
  background: var(--dh-paper);
  color: var(--dh-teal);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1;
}
.ds-tag b {
  font-family: var(--dh-mono);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--dh-gold-600);
  padding-inline-end: 0.65rem;
  border-inline-end: 1px solid var(--dh-line-2);
}
.ds-tag--dark {
  background: transparent;
  border-color: rgba(217, 235, 235, 0.22);
  color: var(--dh-teal-100);
}
.ds-tag--dark b {
  color: var(--dh-gold-light);
  border-color: rgba(217, 235, 235, 0.22);
}

.ds-title {
  margin-top: 1.25rem;
  font-size: clamp(2.1rem, 1.3rem + 2.6vw, 3.6rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--dh-text);
}
.ds-lead {
  margin-top: 1rem;
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.25rem);
  line-height: 1.8;
  color: var(--dh-muted);
}

/* خط قياس تحت العنوان: بينرسم من النص لبرّا */
.ds-rule {
  position: relative;
  display: block;
  width: min(14rem, 60%);
  height: 11px;
  margin: 1.6rem auto 0;
  color: var(--dh-gold);
}
.ds-head--start .ds-rule { margin-inline: 0; }
.ds-rule::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 5px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform 1s var(--dh-ease) 0.25s;
}
.ds-rule::after {
  content: "";
  position: absolute;
  inset: 0;
  border-inline: 1px solid currentColor;
  opacity: 0;
  transition: opacity 0.4s ease 0.9s;
}
.is-visible .ds-rule::before,
.is-visible.ds-rule::before { transform: none; }
.is-visible .ds-rule::after,
.is-visible.ds-rule::after { opacity: 1; }

/* نص بيطلع من ورا قناع */
.ds-mask {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
  padding-block: 0.12em;
  margin-block: -0.12em;
}
.ds-mask > span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 1s var(--dh-ease);
  transition-delay: var(--mask-delay, 0ms);
}
.is-visible .ds-mask > span { transform: none; }

/* ---------- أزرار ---------- */
.ds-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  height: 3.25rem;
  padding-inline: 1.6rem;
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
  cursor: pointer;
  isolation: isolate;
  overflow: hidden;
  transition: color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.ds-btn svg { width: 1.15rem; height: 1.15rem; transition: transform 0.35s var(--dh-ease); }
.ds-btn:hover svg { transform: translateX(-4px); }
.ds-btn:focus-visible { outline: 2px solid var(--dh-gold); outline-offset: 3px; }

/* زر ذهبي مع لمعة بتمرق */
.ds-btn--gold {
  color: var(--dh-ink);
  background: linear-gradient(135deg, var(--dh-gold-light), var(--dh-gold));
  box-shadow: 0 8px 24px -10px rgba(217, 169, 63, 0.7);
}
.ds-btn--gold::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, 0.65) 50%, transparent 65%);
  transform: translateX(-120%);
  animation: ds-shine 4.8s ease-in-out infinite 1.5s;
}
.ds-btn--gold:hover { box-shadow: 0 12px 30px -10px rgba(217, 169, 63, 0.9); }

/* زر خطوط (متل حدود المخطط) */
.ds-btn--line {
  color: var(--dh-teal);
  border: 1px solid var(--dh-line-2);
  background: var(--dh-paper);
}
.ds-btn--line::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--dh-teal);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--dh-ease);
}
.ds-btn--line:hover { color: #fff; border-color: var(--dh-teal); }
.ds-btn--line:hover::before { transform: none; }

@keyframes ds-shine {
  0%, 70% { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}

/* عناصر مغناطيسية (الحركة من ds.js) */
[data-magnetic] { will-change: transform; }
.ds-nowrap { white-space: nowrap; }

/* ---------- تقليل الحركة ---------- */
@media (prefers-reduced-motion: reduce) {
  .ds-rule::before, .ds-rule::after, .ds-mask > span { transition: none; }
  .ds-mask > span { transform: none; }
  .ds-btn--gold::after { animation: none; }
}