/* ==========================================================================
   ALENZY · layout.css
   الشريط العلوي الأدنى، قائمة ملء الشاشة، والفوتر التحريري.
   ========================================================================== */

/* ---------- الشريط العلوي ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-header);
  border-bottom: 1px solid var(--line);
}
/* خلفية الهيدر على طبقة منفصلة (بلا backdrop-filter: أرخص بكثير أثناء التمرير،
   ومع --header-bg شبه المعتمة لا نحتاج التمويه أصلاً). */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--header-bg);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}
.site-header.is-scrolled::before { opacity: 1; }
.site-header.is-hidden { transform: translateY(-100%); }

.header__bar {
  position: relative;
  z-index: calc(var(--z-menu) + 2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
}

/* العلامة */
.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--line-2);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.03em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.brand:hover .brand__mark { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.brand__name { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name > span { font-family: var(--font-display); font-size: 0.98rem; font-weight: 500; }
.brand__name small {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-top: 0.15rem;
}

/* أدوات اليمين */
.header-actions { display: flex; align-items: center; gap: 0.6rem; }

.hud-clock {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  letter-spacing: 0.1em;
  color: var(--paper-3);
  padding-inline: 0.4rem;
}

.lang-toggle {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  letter-spacing: 0.12em;
  color: var(--paper-2);
  border: 1px solid var(--line-2);
  padding: 0.42rem 0.7rem;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), transform 0.35s var(--ease-bounce);
}
.lang-toggle:hover { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); transform: translateY(-2px); }
.lang-toggle:active { transform: translateY(0) scale(0.93); }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line-2);
  color: var(--paper-2);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), transform 0.35s var(--ease-bounce);
}
.theme-toggle:hover { border-color: var(--line-strong); color: var(--paper); background: var(--accent-soft); transform: translateY(-2px); }
.theme-toggle:active { transform: translateY(0) scale(0.9); }
.theme-toggle:active .theme-toggle__icon { transform: scale(0.82) rotate(-20deg); }
.theme-toggle__icon {
  position: relative;
  width: 0.95rem;
  height: 0.95rem;
  border-radius: 50%;
  background: currentColor;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.theme-toggle__icon::after {
  content: "";
  position: absolute;
  top: -0.18rem;
  inset-inline-start: 0.28rem;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg);
  transform: scale(0);
  transition: transform var(--dur) var(--ease);
}
html[data-theme="dark"] .theme-toggle__icon::after { transform: scale(1); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  border: 1px solid var(--line-2);
  padding: 0.42rem 0.7rem;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), transform 0.35s var(--ease-bounce);
}
.nav-toggle:hover { border-color: var(--line-strong); background: var(--accent-soft); transform: translateY(-2px); }
.nav-toggle:active { transform: translateY(0) scale(0.94); }
.nav-toggle__icon { position: relative; width: 1.1rem; height: 0.62rem; display: block; }
.nav-toggle__icon span {
  position: absolute;
  inset-inline: 0;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__icon span:first-child { top: 0; }
.nav-toggle__icon span:last-child { bottom: 0; }
body.nav-open .nav-toggle__icon span:first-child { transform: translateY(4.5px) rotate(45deg); }
body.nav-open .nav-toggle__icon span:last-child { transform: translateY(-4.5px) rotate(-45deg); }

/* ---------- قائمة ملء الشاشة ---------- */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: var(--bg);
  display: flex;
  align-items: center;
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.7s var(--expo);
  pointer-events: none;
}
.site-nav.is-open { clip-path: inset(0 0 0 0); pointer-events: auto; }
.site-nav__inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-l);
  padding-top: var(--header-h);
}
.site-nav__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}
.site-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-block: clamp(0.4rem, 1.6vh, 0.9rem);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: clamp(2rem, 1rem + 6vw, 5.2rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--paper);
  transition: color var(--dur-fast) var(--ease), padding-inline-start var(--dur) var(--expo);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -1px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: inline-start;
  transition: transform var(--dur-slow) var(--expo);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  letter-spacing: 0.1em;
  color: var(--paper-3);
  transition: color var(--dur-fast) var(--ease);
}
.site-nav__link:hover { color: var(--accent-text); padding-inline-start: 1.2rem; }
.site-nav__link:hover .site-nav__num { color: var(--accent-text); }
.site-nav__link[aria-current="page"] { color: var(--accent-text); }
.site-nav__link:active { transform: scale(0.985); }

/* دخول متتابع لعناصر القائمة */
.site-nav__list li,
.site-nav__meta > div {
  opacity: 0;
  transform: translateY(1.4rem);
  transition: opacity 0.55s var(--expo), transform 0.8s var(--expo);
}
.site-nav.is-open .site-nav__list li,
.site-nav.is-open .site-nav__meta > div { opacity: 1; transform: none; }
.site-nav.is-open .site-nav__list li:nth-child(1) { transition-delay: 0.16s; }
.site-nav.is-open .site-nav__list li:nth-child(2) { transition-delay: 0.22s; }
.site-nav.is-open .site-nav__list li:nth-child(3) { transition-delay: 0.28s; }
.site-nav.is-open .site-nav__list li:nth-child(4) { transition-delay: 0.34s; }
.site-nav.is-open .site-nav__list li:nth-child(5) { transition-delay: 0.4s; }
.site-nav.is-open .site-nav__meta > div:nth-child(1) { transition-delay: 0.46s; }
.site-nav.is-open .site-nav__meta > div:nth-child(2) { transition-delay: 0.52s; }
.site-nav.is-open .site-nav__meta > div:nth-child(3) { transition-delay: 0.58s; }

.site-nav__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-s);
  border-top: 1px solid var(--line);
  padding-top: var(--space-s);
}
.site-nav__meta a { color: var(--paper-2); transition: color var(--dur-fast) var(--ease); }
.site-nav__meta a:hover { color: var(--accent-text); }
.site-nav__meta p { margin-bottom: 0.4rem; }

/* إخفاء القائمة القديمة المضمّنة (نستخدم الطغية فقط) */
.site-nav__cta { display: none; }

/* ---------- الفوتر ---------- */
.site-footer {
  position: relative;
  margin-top: var(--space-xl);
  padding-top: var(--space-l);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  inset-inline: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.55;
  pointer-events: none;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr;
  gap: var(--space-m) var(--space-l);
  align-items: start;
}
.site-footer__brand .mono { margin-bottom: 0.9rem; }
.site-footer__title {
  font-size: var(--fs-h2);
  margin-top: 0.2rem;
  max-width: 16ch;
  letter-spacing: -0.03em;
}
.footer-cta { margin-top: var(--space-s); }
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 1.1rem;
  font-weight: 400;
}
.footer-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.7rem; }
.footer-list a {
  color: var(--paper-2);
  position: relative;
  display: inline-block;
  transition: color var(--dur-fast) var(--ease), transform var(--dur) var(--expo);
}
.footer-list a::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: inline-start;
  transition: transform var(--dur) var(--expo);
}
.footer-list a:hover { color: var(--accent-text); transform: translateX(6px); }
html[dir="rtl"] .footer-list a:hover { transform: translateX(-6px); }
.footer-list a:hover::after { transform: scaleX(1); }

/* اسم عملاق متدرّج أسفل الفوتر */
.site-footer__mark {
  margin-top: var(--space-l);
  padding-top: var(--space-s);
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.site-footer__mark span {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.1rem, 0.6rem + 12.5vw, 14rem);
  line-height: 0.86;
  letter-spacing: -0.055em;
  white-space: nowrap;
  background: linear-gradient(100deg, var(--paper) 0%, var(--accent) 38%, var(--paper) 62%, var(--accent) 100%);
  background-size: 100% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
html[lang="en"] .site-footer__mark span { letter-spacing: -0.045em; font-size: clamp(2rem, 0.4rem + 10vw, 12rem); }

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: var(--space-m);
  padding-block: var(--space-s);
  border-top: 1px solid var(--line);
  color: var(--paper-3);
  font-size: var(--fs-small);
}

/* ---------- زر العودة للأعلى ---------- */
.back-to-top {
  position: fixed;
  inset-inline-end: var(--gutter);
  bottom: var(--gutter);
  z-index: var(--z-top);
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  background: var(--header-bg);
  color: var(--paper);
  font-size: 1.1rem;
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.back-to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* ---------- شريط التقدّم ---------- */
.scroll-progress {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: 2px;
  z-index: var(--z-top);
  background: var(--accent);
  transform-origin: inline-start;
  transform: scaleX(0);
  pointer-events: none;
}

@media (max-width: 720px) {
  .hud-clock { display: none; }
  .nav-toggle__label { display: none; }
  .brand__name small { display: none; }
  .site-footer__grid { grid-template-columns: 1fr; gap: var(--space-s); }
}