/* ==========================================================================
   layout.css — هدر، منوی تمام‌صفحه، فوتر، انیمیشن معرفی، نشانگر و بافت
   ========================================================================== */

/* --------------------------------------------------------------------------
   ۱. هدر
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 60;
  color: var(--ink);
  transition: transform 0.7s var(--ease), color 0.5s var(--ease-in-out);
}

.header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-block-end: 1px solid var(--line);
  opacity: 0;
  transition: opacity 0.5s var(--ease-in-out);
}

.header.is-solid::before { opacity: 1; }
.header.is-hidden { transform: translate3d(0, -100%, 0); }

/* روی تصویر تمام‌صفحه (خانه، پروژه، درباره) */
.header.is-over-media { color: var(--on-image); }
.header.is-over-media::before { opacity: 0; }

.header__bar {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--gap-md);
  height: var(--header-h);
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---- برند ---- */
.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  line-height: 1;
}

.brand__logo { height: 36px; width: auto; }
.brand__logo--light { display: none; }
.header.is-over-media .brand__logo--dark { display: none; }
.header.is-over-media .brand__logo--light { display: block; }

.brand__mark {
  position: relative;
  width: 22px;
  height: 22px;
  flex: none;
}

.brand__mark i {
  position: absolute;
  inset: 0;
  border: 1.5px solid currentColor;
  transition: transform 0.9s var(--ease);
}

.brand__mark i:last-child { transform: rotate(45deg) scale(0.72); }
.brand:hover .brand__mark i:first-child { transform: rotate(90deg); }
.brand:hover .brand__mark i:last-child { transform: rotate(135deg) scale(0.72); }

.brand__word {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

html[lang="en"] .brand__word { text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.86rem; }

/* ---- منوی اصلی ---- */
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2.4vw, 2.6rem);
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: flex-start;
  gap: 0.2rem;
  padding-block: 0.5rem;
  font-size: 0.94rem;
  font-weight: 400;
  white-space: nowrap;
}

html[lang="en"] .nav__link {
  font-family: var(--font-display-en);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav__text { position: relative; }

.nav__text::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: -0.2rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.6s var(--ease);
}

html[dir="ltr"] .nav__text::after { transform-origin: left; }

.nav__link:hover .nav__text::after,
.nav__link.is-active .nav__text::after { transform: scaleX(1); }

.nav__count {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  line-height: 1;
  opacity: 0.55;
  top: -0.1em;
}

@media (max-width: 1100px) {
  .nav { display: none; }
  .header__bar { grid-template-columns: 1fr auto; }
}

/* ---- ابزارها ---- */
.header__tools {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1vw, 0.9rem);
}

.lang-toggle {
  position: relative;
  display: inline-grid;
  grid-auto-flow: column;
  padding: 3px;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  line-height: 1;
  opacity: 0.9;
}

.lang-toggle__item {
  min-width: 2.2rem;
  padding: 0.42rem 0.6rem;
  border-radius: var(--radius-pill);
  text-align: center;
  font-family: var(--font-en);
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

.lang-toggle__item[lang="fa"] { font-family: var(--font-fa); letter-spacing: 0; font-size: 0.8rem; }
.lang-toggle__item.is-active { background: var(--ink); color: var(--bg); }
.header.is-over-media .lang-toggle__item.is-active { background: var(--on-image); color: #111; }
.lang-toggle__item:not(.is-active):hover { opacity: 0.65; }

.round-btn {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: 0.9;
  transition: opacity var(--dur-fast);
}

.round-btn:hover { opacity: 1; }

.theme-toggle__disc {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
  border: 1.5px solid currentColor;
  transition: transform 0.8s var(--ease);
}

:root[data-theme="dark"] .theme-toggle__disc { transform: rotate(180deg); }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__disc { transform: rotate(180deg); }
}

.menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
}

.menu-btn__lines { display: grid; gap: 7px; width: 26px; }

.menu-btn__lines i {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.6s var(--ease), width 0.6s var(--ease);
}

.menu-btn__lines i:last-child { width: 62%; margin-inline-start: auto; }
.menu-btn:hover .menu-btn__lines i:last-child { width: 100%; }
.menu-btn[aria-expanded="true"] .menu-btn__lines i:first-child { transform: translateY(4.25px) rotate(45deg); }
.menu-btn[aria-expanded="true"] .menu-btn__lines i:last-child { width: 100%; transform: translateY(-4.25px) rotate(-45deg); }

@media (max-width: 1100px) {
  .menu-btn { display: inline-grid; }
}

@media (max-width: 480px) {
  .theme-toggle { display: none; }
}

/* --------------------------------------------------------------------------
   ۲. منوی تمام‌صفحه
   -------------------------------------------------------------------------- */
.menu {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: grid;
  background: var(--ink);
  color: var(--bg);
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  transition: clip-path 0.9s var(--ease), visibility 0s linear 0.9s;
}

.menu[hidden] { display: grid; }

.menu.is-open {
  clip-path: inset(0 0 0 0);
  visibility: visible;
  transition: clip-path 0.9s var(--ease), visibility 0s;
}

body.menu-open .header { color: var(--bg); }
body.menu-open .header::before { opacity: 0; }
body.menu-open .header .brand__logo--dark { display: none; }
body.menu-open .header .brand__logo--light { display: block; }
body.menu-open .lang-toggle__item.is-active { background: var(--bg); color: var(--ink); }

.menu__inner {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: var(--gap-lg);
  padding: calc(var(--header-h) + 2rem) var(--gutter) calc(2rem + env(safe-area-inset-bottom));
  overflow-y: auto;
}

.menu__list { display: grid; align-content: center; gap: clamp(0.25rem, 1.2vh, 0.85rem); }

.menu__link {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 9vw, 4.25rem);
  font-weight: 300;
  line-height: 1.12;
  opacity: 0;
  transform: translate3d(0, 1.5rem, 0);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease), color 0.3s;
  transition-delay: calc(0.18s + var(--i, 0) * 0.05s);
}

html[lang="fa"] .menu__link { font-weight: 280; line-height: 1.4; }

.menu.is-open .menu__link { opacity: 1; transform: none; }
.menu__link.is-active .menu__text { font-style: italic; color: var(--accent); }
html[lang="fa"] .menu__link.is-active .menu__text { font-style: normal; }

.menu__index,
.menu__count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  opacity: 0.5;
}

.menu__aside {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem 2rem;
  padding-block-start: var(--gap-md);
  border-block-start: 1px solid color-mix(in srgb, var(--bg) 18%, transparent);
  font-size: 0.92rem;
  opacity: 0;
  transition: opacity 0.8s var(--ease) 0.45s;
}

.menu.is-open .menu__aside { opacity: 1; }
.menu__contact { opacity: 0.75; }
.menu__contact:hover { opacity: 1; }

/* --------------------------------------------------------------------------
   ۳. محتوای اصلی
   -------------------------------------------------------------------------- */
.main { display: block; min-height: 60vh; }

/* صفحاتی که تصویر تمام‌صفحه ندارند فاصله هدر می‌گیرند */
body:not(.has-media-hero) .main { padding-block-start: var(--header-h); }

/* سرصفحه صفحات داخلی */
.page-head {
  padding-block: clamp(3.5rem, 9vw, 9rem) clamp(2rem, 4vw, 4rem);
}

.page-head__row {
  display: grid;
  gap: var(--gap-md);
  align-items: end;
}

@media (min-width: 900px) {
  .page-head__row { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }
}

.page-head__title { margin-block-start: 1.1rem; }
.page-head__lead { max-width: 38rem; justify-self: end; }
html[dir="rtl"] .page-head__lead { justify-self: start; }

@media (max-width: 899px) {
  .page-head__lead { justify-self: start; }
}

.page-head__count {
  font-family: var(--font-mono);
  font-size: 0.4em;
  vertical-align: super;
  letter-spacing: 0;
  color: var(--muted);
  margin-inline-start: 0.35rem;
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   ۴. فوتر
   -------------------------------------------------------------------------- */
.footer {
  position: relative;
  padding-block: var(--section) 1.75rem;
  border-block-start: 1px solid var(--line);
  overflow: hidden;
}

.footer__cta { display: grid; gap: 1.25rem; margin-block-end: var(--gap-lg); }

.footer__cta-link {
  display: inline-flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  justify-self: start;
}

.footer__cta-link .t-d1 {
  background: linear-gradient(currentColor, currentColor) no-repeat 100% 100% / 0 1px;
  transition: background-size 0.9s var(--ease);
  padding-block-end: 0.08em;
}

html[dir="ltr"] .footer__cta-link .t-d1 { background-position: 0 100%; }
.footer__cta-link:hover .t-d1 { background-size: 100% 1px; }

.footer__cta-arrow {
  display: grid;
  place-items: center;
  width: clamp(3.25rem, 6vw, 5.5rem);
  aspect-ratio: 1;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  transition: background-color 0.6s var(--ease), color 0.6s var(--ease), transform 0.8s var(--ease);
}

.footer__cta-link:hover .footer__cta-arrow { background: var(--ink); color: var(--bg); transform: rotate(45deg); }

.footer__grid {
  display: grid;
  gap: var(--gap-md);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  padding-block: var(--gap-md);
  border-block-start: 1px solid var(--line);
}

.footer__col { display: grid; align-content: start; gap: 0.9rem; font-size: 0.95rem; }
.footer__col p:not(.label) { color: var(--ink-2); }
.footer__links { display: grid; gap: 0.45rem; }
.footer__links a { color: var(--ink-2); transition: color var(--dur-fast); }
.footer__links a:hover { color: var(--ink); }

.footer__word {
  margin-block: var(--gap-lg) 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 13.5vw, 15rem);
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: -0.045em;
  white-space: nowrap;
  color: var(--bg-3);
  user-select: none;
}

html[lang="fa"] .footer__word { letter-spacing: -0.01em; line-height: 1.25; font-size: clamp(2.8rem, 11vw, 12rem); font-weight: 700; }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block-start: 1.25rem;
  border-block-start: 1px solid var(--line);
  font-size: var(--fs-small);
  color: var(--muted);
}

.footer__top { display: inline-flex; align-items: center; gap: 0.5rem; transition: color var(--dur-fast); }
.footer__top:hover { color: var(--ink); }
.footer__top-icon { transform: rotate(180deg); }

/* --------------------------------------------------------------------------
   ۵. پیام‌ها
   -------------------------------------------------------------------------- */
.toasts {
  position: fixed;
  z-index: 70;
  inset-block-end: 1.25rem;
  inset-inline-start: 50%;
  display: grid;
  gap: 0.5rem;
  width: min(34rem, calc(100% - 2 * var(--gutter)));
  transform: translateX(-50%);
}

html[dir="rtl"] .toasts { transform: translateX(50%); }

.toast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.92rem;
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.45);
  animation: toast-in 0.8s var(--ease) both;
}

.toast--error { background: var(--danger); color: #fff; }
.toast--success::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #6fcf97; flex: none; }
.toast p { flex: 1; }
.toast__close { opacity: 0.7; }
.toast__close:hover { opacity: 1; }
.toast.is-leaving { animation: toast-out 0.5s var(--ease) forwards; }

@keyframes toast-in { from { opacity: 0; transform: translateY(1rem); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(1rem); } }