.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-space);
  position: relative;
}

.section--tight {
  padding-block: clamp(2.75rem, 6vw, 5rem);
}

.section--flush-top {
  padding-block-start: 0;
}

/* A subtly lifted band inside the dark field */
.section--alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.022), rgba(255, 255, 255, 0));
  border-block: 1px solid var(--line);
}

/* Back-compat aliases from the previous shell */
.section--band {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.022), rgba(255, 255, 255, 0));
  border-block: 1px solid var(--line);
}

.section--dark {
  background: var(--night);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4) var(--space-6);
  margin-block-end: clamp(2rem, 4.5vw, 3.5rem);
}

.section-head__text {
  display: grid;
  gap: var(--space-3);
}

.section-head h2 {
  font-size: var(--text-2xl);
}

.section-head__aside {
  font-size: var(--text-sm);
  color: var(--fg-soft);
  max-width: 24rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--margin-col);
  column-gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}

.split__margin {
  position: sticky;
  inset-block-start: calc(var(--header-h) + 1.5rem);
  padding-inline-start: clamp(1rem, 2vw, 1.75rem);
  border-inline-start: 1px solid var(--line);
}

.split__margin::before {
  content: "";
  display: block;
  inline-size: 2rem;
  block-size: 2px;
  background: var(--grad-primary);
  border-radius: var(--r-full);
  margin-block-end: var(--space-5);
}

.split__margin > :first-child {
  margin-block-start: 0;
}

@media (max-width: 60rem) {
  .split {
    grid-template-columns: minmax(0, 1fr);
    row-gap: var(--space-6);
  }

  .split__margin {
    position: static;
    border-inline-start: 0;
    border-block-start: 1px solid var(--line);
    padding-inline-start: 0;
    padding-block-start: var(--space-5);
  }

  .split__margin::before {
    display: none;
  }
}

/* ---------------------------------- Masthead --------------------------------- */

.masthead {
  position: sticky;
  inset-block-start: 0;
  z-index: 100;
  min-height: var(--header-h);
  border-block-end: 1px solid transparent;
  background: transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    backdrop-filter var(--dur) var(--ease);
}

.masthead.is-scrolled,
.nav-open .masthead {
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border-block-end-color: var(--line);
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 2.5rem);
  min-height: var(--header-h);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--fg);
  white-space: nowrap;
}

.wordmark:hover {
  color: var(--fg);
}

.wordmark__mark {
  inline-size: 1.85rem;
  block-size: 1.85rem;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--r-xs);
  background: var(--grad-primary);
  color: var(--on-accent);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1;
  box-shadow: var(--glow-firouzeh);
}

.wordmark__or {
  display: grid;
  gap: 0.1rem;
  line-height: 1;
}

.wordmark__latin {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 118%;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  line-height: 1;
}

.wordmark__fa {
  font-family: var(--font-fa-display);
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--fg-soft);
  line-height: 1;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.8vw, 1.4rem);
  margin-inline-start: auto;
}

.nav__link {
  position: relative;
  color: var(--fg-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0.5rem 0.35rem;
  border-radius: var(--r-xs);
  transition: color var(--dur-fast) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0.35rem;
  inset-block-end: 0.2rem;
  block-size: 2px;
  border-radius: var(--r-full);
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur) var(--ease-out);
}

.nav__link:hover {
  color: var(--fg);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav__link[aria-current="page"] {
  color: var(--fg);
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.masthead__cta {
  display: none;
}

.nav-toggle {
  display: none;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  flex: none;
  place-items: center;
  background: var(--plate);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  color: var(--fg);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.nav-toggle:hover {
  background: var(--plate-strong);
  border-color: var(--firouzeh);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  inline-size: 1.15rem;
  block-size: 2px;
  border-radius: var(--r-full);
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline: 0;
}

.nav-toggle__bars::before {
  inset-block-start: -6px;
}

.nav-toggle__bars::after {
  inset-block-start: 6px;
}

.nav-open .nav-toggle__bars {
  background: transparent;
}

.nav-open .nav-toggle__bars::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-open .nav-toggle__bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile navigation: full-height glass sheet */
.mobile-nav {
  display: none;
}

@media (max-width: 60rem) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: inline-grid;
  }

  .nav-open {
    overflow: hidden;
  }

  .mobile-nav {
    display: block;
    position: fixed;
    inset-block-start: var(--header-h);
    inset-inline: 0;
    inset-block-end: 0;
    z-index: 90;
    background: var(--glass);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    backdrop-filter: blur(24px) saturate(140%);
    border-block-start: 1px solid var(--line);
    padding-block: var(--space-6) var(--space-8);
    overflow-y: auto;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease-out);
  }

  .mobile-nav[data-open="true"] {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .mobile-nav__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.25rem;
  }

  .mobile-nav__item {
    opacity: 0;
    transform: translateY(10px);
  }

  .mobile-nav[data-open="true"] .mobile-nav__item {
    animation: nav-in 0.45s var(--ease-out) forwards;
    animation-delay: calc(var(--i, 0) * 55ms);
  }

  .mobile-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-block: 0.95rem;
    font-family: var(--font-fa-display);
    font-weight: 600;
    font-size: var(--text-xl);
    color: var(--fg);
    text-decoration: none;
    border-block-end: 1px solid var(--line);
    transition: color var(--dur-fast) var(--ease), padding var(--dur) var(--ease);
  }

  .mobile-nav__link::after {
    content: "←";
    font-size: 1.1em;
    color: var(--firouzeh);
    opacity: 0.4;
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur) var(--ease-out);
  }

  .mobile-nav__link:hover,
  .mobile-nav__link:focus-visible {
    color: var(--firouzeh-bright);
  }

  .mobile-nav__link:hover::after {
    opacity: 1;
    transform: translateX(-4px);
  }

  .mobile-nav__link[aria-current="page"] {
    color: var(--firouzeh-bright);
  }

  .mobile-nav__link[aria-current="page"]::after {
    opacity: 1;
  }

  .mobile-nav__foot {
    margin-block-start: var(--space-6);
    display: grid;
    gap: var(--space-4);
    justify-items: start;
  }

  .mobile-nav__phone {
    color: var(--fg-soft);
    font-size: var(--text-sm);
  }
}

@keyframes nav-in {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 61rem) {
  .masthead__cta {
    display: inline-flex;
  }
}

/* ----------------------------------- Footer ---------------------------------- */

.footer {
  position: relative;
  margin-block-start: var(--section-space);
  border-block-start: 1px solid var(--line);
  background:
    radial-gradient(900px 420px at 50% 0%, rgba(75, 99, 216, 0.16), transparent 70%),
    var(--night);
  padding-block: clamp(3.5rem, 8vw, 6rem) var(--space-6);
  overflow: hidden;
}

.footer__mast {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block-end: var(--space-7);
  border-block-end: 1px solid var(--line);
}

.footer__wordmark {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 120%;
  font-size: clamp(2.75rem, 9vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: 0.04em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.footer__wordmark-fa {
  display: block;
  font-family: var(--font-fa-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  color: var(--fg-soft);
  margin-block-start: 0.6rem;
}

.footer__note {
  max-width: 22rem;
  font-size: var(--text-sm);
  color: var(--fg-soft);
  margin: 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: var(--space-6);
  padding-block: var(--space-7);
}

.footer__title {
  font-family: var(--font-fa-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg);
  margin-block-end: var(--space-4);
}

.footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
  font-size: var(--text-sm);
}

.footer__list a {
  color: var(--fg-soft);
  transition: color var(--dur-fast) var(--ease), padding var(--dur) var(--ease);
}

.footer__list a:hover {
  color: var(--firouzeh-bright);
  padding-inline-start: 0.25rem;
}

.footer__list a[aria-current="true"] {
  color: var(--firouzeh-bright);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  justify-content: space-between;
  align-items: center;
  padding-block-start: var(--space-5);
  border-block-start: 1px solid var(--line);
  font-size: var(--text-xs);
  color: var(--fg-faint);
}

.footer__bottom a {
  color: var(--fg-soft);
}

/* ---------------------------------- CTA band --------------------------------- */

.cta-band {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(34, 48, 107, 0.55), rgba(10, 16, 32, 0.9));
}

.cta-band .cta-band__scene {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: auto;
  width: 72%;
  z-index: 0;
  opacity: 0.75;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, #000 12%, rgba(0, 0, 0, 0.5) 55%, transparent 94%);
  mask-image: linear-gradient(90deg, #000 12%, rgba(0, 0, 0, 0.5) 55%, transparent 94%);
}

.cta-band__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.cta-band__text {
  font-size: var(--text-2xl);
  max-width: 34rem;
  margin: 0;
}

.cta-band__sub {
  margin-block-start: var(--space-3);
  color: var(--fg-soft);
  font-size: var(--text-sm);
}

.cta-band .btn {
  flex: none;
}

/* --------------------------------- Messages ---------------------------------- */

.messages-wrap {
  padding-block-start: var(--space-5);
}

.messages {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.message {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-pop);
}

.message::before {
  content: "";
  inline-size: 0.5rem;
  block-size: 0.5rem;
  flex: none;
  border-radius: var(--r-full);
  background: var(--firouzeh);
  box-shadow: 0 0 14px var(--firouzeh);
}

.message--success::before {
  background: var(--success);
  box-shadow: 0 0 14px var(--success);
}

.message--error {
  border-color: rgba(255, 111, 97, 0.5);
}

.message--error::before {
  background: var(--lac);
  box-shadow: 0 0 14px var(--lac);
}

/* ----------------------------------- Grids ----------------------------------- */

.grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.grid--journal {
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
}

.grid--roster {
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
}

.grid--products {
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
}

@media (max-width: 40rem) {
  .grid--journal,
  .grid--roster,
  .grid--products {
    grid-template-columns: minmax(0, 1fr);
  }
}