/* ============================================================
   SITE HEADER — Premium Neumorphic Sticky Header
   RTL · Sticky · Responsive · Accessible
   ============================================================ */

/* ------------------------------------------------------------
   01. Header Shell
   ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(248, 243, 229, 0.82);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: clamp(16px, 2.5vw, 28px);
  transition:
    background var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.site-header.is-scrolled {
  background: rgba(248, 243, 229, 0.95);
  box-shadow: 0 4px 24px rgba(9, 9, 12, 0.06);
  border-bottom-color: var(--border-strong);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  height: var(--header-h);
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

/* ------------------------------------------------------------
   02. Brand / Logo
   ------------------------------------------------------------ */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: inherit;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--dark);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.brand:hover {
  opacity: 0.85;
}

.brand__mark {
  width: 40px;
  height: 40px;
  display: inline-grid;
  place-items: center;
  border-radius: 12px;
  background: var(--primary);
  color: var(--dark);
  flex-shrink: 0;
  box-shadow:
    0 4px 12px rgba(9, 9, 12, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: transform var(--transition);
}

.brand__mark img,
.brand__mark svg {
  width: 70%;
  /* ← ۷۰٪ کادر، بقیه میشه فاصله */
  height: 70%;
  object-fit: contain;
  /* ← نسبت ابعاد حفظ میشه */
  display: block;
}

.brand:hover .brand__mark {
  transform: rotate(-4deg) scale(1.04);
}



.brand__text {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand__text img {
  display: block;
  height: 22px;
  /* ارتفاع لوگوتایپ - می‌تونی تنظیم کنی */
  width: auto;
  /* نسبت ابعاد حفظ میشه */
  object-fit: contain;
}

/* ------------------------------------------------------------
   03. Main Navigation
   ------------------------------------------------------------ */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-inline: auto;
}

.main-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-soft);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: all var(--transition);
  white-space: nowrap;
}

.main-nav__link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  right: 50%;
  transform: translateX(50%) scaleX(0);
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition);
  transform-origin: center;
}

.main-nav__link:hover {
  color: var(--text-main);
  background: var(--surface-raised);
}

.main-nav__link.is-active {
  color: var(--primary-700);
  background: var(--primary-050);
}

.main-nav__link.is-active::after {
  transform: translateX(50%) scaleX(1);
}

/* Optional: Chevron for dropdown menu */
.main-nav__link svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
  transition: transform var(--transition);
}

.main-nav__link:hover svg {
  opacity: 0.9;
}

/* ------------------------------------------------------------
   04. Header Actions (Login + CTA)
   ------------------------------------------------------------ */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}

.header-actions__login {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-soft);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: all var(--transition);
}

.header-actions__login:hover {
  color: var(--primary-700);
  background: var(--surface-raised);
}

.header-actions__login svg {
  width: 16px;
  height: 16px;
}

.header-actions__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--dark);
  background: var(--primary);
  text-decoration: none;
  border-radius: var(--r-md);
  box-shadow:
    0 4px 12px rgba(229, 176, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: all var(--transition);
  white-space: nowrap;
}

.header-actions__cta:hover {
  background: var(--primary-600);
  transform: translateY(-1px);
  box-shadow:
    0 6px 18px rgba(229, 176, 0, 0.38),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.header-actions__cta:active {
  transform: translateY(0);
}

.header-actions__cta svg {
  width: 16px;
  height: 16px;
}

/* ------------------------------------------------------------
   05. Hamburger Button
   ------------------------------------------------------------ */
.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--r-md);
  background: var(--surface-raised);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-raised-sm);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.hamburger:hover {
  color: var(--primary-700);
  border-color: var(--primary-100);
}

.hamburger__icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background var(--transition);
}

.hamburger__icon::before,
.hamburger__icon::after {
  content: "";
  position: absolute;
  right: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition), top var(--transition);
}

.hamburger__icon::before {
  top: -6px;
}

.hamburger__icon::after {
  top: 6px;
}

/* Open state — transform to X */
.hamburger.is-open .hamburger__icon {
  background: transparent;
}

.hamburger.is-open .hamburger__icon::before {
  top: 0;
  transform: rotate(45deg);
}

.hamburger.is-open .hamburger__icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ------------------------------------------------------------
   06. Mobile Menu Panel
   ------------------------------------------------------------ */
.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 999;
  background: var(--light);
  padding: var(--sp-5);
  overflow-y: auto;
  overscroll-behavior: contain;

  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition:
    opacity 260ms cubic-bezier(0.4, 0, 0.2, 1),
    transform 260ms cubic-bezier(0.4, 0, 0.2, 1),
    visibility 260ms;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu__inner {
  max-width: 480px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.mobile-menu__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4);
  font-size: var(--fs-body-lg);
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  border-radius: var(--r-md);
  transition: all var(--transition);
}

.mobile-menu__link:hover,
.mobile-menu__link.is-active {
  background: var(--surface-raised);
  color: var(--primary-700);
  box-shadow: var(--shadow-raised-sm);
}

.mobile-menu__link svg {
  width: 18px;
  height: 18px;
  opacity: 0.4;
  transition: opacity var(--transition);
}

.mobile-menu__link:hover svg {
  opacity: 1;
}

.mobile-menu__divider {
  height: 1px;
  background: var(--border-soft);
  margin-block: var(--sp-2);
}

.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border-soft);
}

/* ------------------------------------------------------------
   07. Backdrop (blur overlay behind mobile menu)
   ------------------------------------------------------------ */
.header-backdrop {
  position: fixed;
  inset: 0;
  z-index: 998;
  background: rgba(9, 9, 12, 0.28);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.header-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ------------------------------------------------------------
   08. Progress Bar (اختیاری — نوار پیشرفت اسکرول)
   ------------------------------------------------------------ */
.header-progress {
  position: absolute;
  bottom: -1px;
  right: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(to left, var(--primary), var(--primary-700));
  transition: width 80ms linear;
  pointer-events: none;
}

/* ------------------------------------------------------------
   09. Body lock
   ------------------------------------------------------------ */
body.is-locked {
  overflow: hidden;
  touch-action: none;
}

/* ------------------------------------------------------------
   10. Responsive
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .main-nav {
    gap: 2px;
  }

  .main-nav__link {
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .header-actions__cta {
    padding: 9px 14px;
    font-size: 0.82rem;
  }
}

@media (max-width: 900px) {

  /* Hide desktop nav & actions, show hamburger */
  .main-nav,
  .header-actions {
    display: none;
  }

  .hamburger {
    display: grid;
  }

  .site-header__inner {
    justify-content: space-between;
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    padding-inline: var(--sp-4);
    gap: var(--sp-3);
  }

  .brand {
    font-size: 1.2rem;
  }

  .brand__mark {
    width: 32px;
    height: 32px;
    border-radius: 10px;
  }

  .brand__mark svg {
    width: 18px;
    height: 18px;
  }

  .brand__text-en {
    display: none;
  }

  .mobile-menu {
    padding: var(--sp-4);
  }

  .mobile-menu__link {
    font-size: var(--fs-body);
    padding: var(--sp-3) var(--sp-4);
  }
}

@media (max-width: 400px) {
  .brand {
    font-size: 1.1rem;
  }

  .hamburger {
    width: 38px;
    height: 38px;
  }
}

/* ------------------------------------------------------------
   11. Motion Preferences
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {

  .site-header,
  .mobile-menu,
  .header-backdrop,
  .hamburger__icon,
  .hamburger__icon::before,
  .hamburger__icon::after {
    transition-duration: 0.01ms !important;
  }
}