/* dns-shell.css: header, closing call to action, footer and contact modal.
   DRAFT - pending designer sign-off. Global: every page renders the shell. */

/* Header */
.dns-header {
  position: fixed;
  left: 0;
  right: 0;
  top: calc(env(safe-area-inset-top, 0px) + 10px);
  z-index: 50;
  pointer-events: none;
}
.dns-header.dns-is-hidden { transform: translateY(calc(-100% - 20px)); }

.dns-header__bar {
  position: relative;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 64px;
  padding-inline: clamp(20px, 2.4vw, 36px);
  border-radius: var(--dns-radius-nav);
  background: var(--dns-color-header-bg);
  color: var(--dns-color-text-inverse);
}
.dns-header.dns-is-scrolled .dns-header__bar { box-shadow: var(--dns-shadow-bar); }

.dns-logo { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 5px; min-width: 0; min-height: 44px; flex: 1 1 auto; white-space: nowrap; }
.dns-logo__name, .dns-logo__tag { max-width: 100%; overflow: hidden; text-overflow: ellipsis; }
.dns-logo__name {
  font-family: var(--dns-font-primary);
  font-weight: var(--dns-weight-semibold);
  font-size: var(--dns-text-lg);
  letter-spacing: var(--dns-tracking-tight);
  line-height: 1;
}
.dns-logo__tag {
  font-family: var(--dns-font-mono);
  font-size: var(--dns-text-xs);
  letter-spacing: .1em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--dns-color-inverse-soft);
}

.dns-menu-btn {
  flex: none;
  min-height: 44px;
  min-width: 44px;
  padding: 8px;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.dns-nav {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  flex-direction: column;
  padding: 8px 20px 20px;
  border-radius: var(--dns-radius-nav);
  background: var(--dns-color-header-bg);
  box-shadow: var(--dns-shadow-dropdown);
}
.dns-nav.dns-is-open { display: flex; }
.dns-nav__main, .dns-nav__actions { display: flex; flex-direction: column; }
.dns-nav__link {
  display: block;
  padding-block: 14px;
  border-bottom: 1px solid var(--dns-color-line-inverse);
  font-size: var(--dns-text-lg);
  color: var(--dns-color-inverse-soft);
}
.dns-nav__link:hover, .dns-nav__link[aria-current="page"] { color: var(--dns-color-white); }
.dns-nav .dns-btn { margin-top: 20px; }

/* Closing call to action and footer, revealed from behind the last section */
.dns-backdrop {
  position: relative;
  z-index: 1;
  isolation: isolate;
  overflow: clip;
  margin-top: calc(-1 * var(--dns-radius-panel));
  padding-top: var(--dns-radius-panel);
}
.dns-backdrop::before {
  content: "";
  position: absolute;
  inset: -10%;
  z-index: -1;
  pointer-events: none;
  background: var(--dns-gradient-soft);
}
.dns-backdrop__rings {
  position: absolute;
  z-index: -1;
  left: -60%;
  top: -10%;
  width: min(1200px, 110vw);
  max-width: none;
  height: auto;
  aspect-ratio: 1;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(closest-side, var(--dns-color-ink) 55%, transparent 100%);
  mask-image: radial-gradient(closest-side, var(--dns-color-ink) 55%, transparent 100%);
}
.dns-backdrop__inner { transform: translate3d(0, var(--dns-rise, 0px), 0); }

.dns-closing {
  display: grid;
  justify-items: center;
  gap: 28px;
  padding-block: clamp(96px, 12vw, 168px) clamp(64px, 8vw, 112px);
  text-align: center;
}
.dns-closing__title { margin: 0; max-width: 15em; text-wrap: balance; }
.dns-closing__text { margin: 0; max-width: 34em; }
.dns-closing__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 8px; }

.dns-footer {
  padding: clamp(32px, 4vw, 56px) clamp(24px, 4vw, 56px) clamp(24px, 3vw, 36px);
  border-radius: var(--dns-radius-footer);
  background: var(--dns-color-footer-bg);
  color: var(--dns-color-text-inverse);
  box-shadow: var(--dns-shadow-card);
}
.dns-footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--dns-color-line-inverse);
}
.dns-footer__logo { display: grid; gap: 8px; }
.dns-footer__name {
  font-weight: var(--dns-weight-semibold);
  font-size: var(--dns-fluid-label);
  letter-spacing: var(--dns-tracking-tight);
  line-height: 1;
}
.dns-footer__tag {
  font-family: var(--dns-font-mono);
  font-size: var(--dns-text-xs);
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--dns-color-inverse-soft);
}
.dns-footer__tagline { margin: 0; font-size: var(--dns-fluid-card); letter-spacing: -0.01em; }
.dns-footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 20px;
  padding-block: 40px 48px;
}
.dns-footer__heading { margin: 0 0 18px; color: inherit; }
.dns-footer__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.dns-footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--dns-color-inverse-soft);
}
.dns-footer__link:hover { color: var(--dns-color-white); }
.dns-footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px 32px;
  padding-top: 22px;
  border-top: 1px solid var(--dns-color-line-inverse);
  font-size: var(--dns-text-sm);
}
.dns-social { display: flex; gap: 10px; }
.dns-social__link {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--dns-radius-button);
}
.dns-social__link:hover { background: var(--dns-color-line-inverse); }
.dns-social__icon { width: 20px; height: 20px; fill: currentColor; }
.dns-footer-gap { height: clamp(16px, 3vw, 40px); }

/* Contact modal */
.dns-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px));
}
.dns-modal[hidden], .dns-modal [hidden] { display: none; }
.dns-modal__scrim {
  position: absolute;
  inset: 0;
  background: var(--dns-color-scrim);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.dns-modal__card {
  position: relative;
  width: min(540px, 100%);
  max-height: calc(100vh - 32px);
  overflow: auto;
  overscroll-behavior: contain;
  padding: clamp(28px, 4vw, 44px);
  border-radius: var(--dns-radius-footer);
  background: var(--dns-color-cream);
  color: var(--dns-color-text-primary);
  box-shadow: var(--dns-shadow-card);
}
.dns-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--dns-color-line);
  border-radius: var(--dns-radius-button);
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.dns-modal__close:hover { background: var(--dns-color-line); }
.dns-modal__close-icon { width: 16px; height: 16px; }
.dns-modal__title { margin: 0 48px 10px 0; font-size: var(--dns-fluid-heading); }
.dns-modal__sub { margin: 0 0 26px; }
.dns-form { display: grid; gap: 18px; }
.dns-form__field { display: grid; gap: 7px; }
.dns-form__label { font-size: var(--dns-text-sm); font-weight: var(--dns-weight-semibold); }
.dns-form__required { color: var(--dns-color-warning); }
.dns-form__input {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--dns-color-line-strong);
  border-radius: 12px;
  background: var(--dns-color-white);
  color: var(--dns-color-text-primary);
  font: inherit;
  font-size: var(--dns-text-base);
}
.dns-form__input--area { min-height: 130px; resize: vertical; line-height: 1.5; }
.dns-form__input:focus { border-color: var(--dns-color-blue-accent); outline: 2px solid var(--dns-color-blue-accent); outline-offset: 1px; }
.dns-form__input[aria-invalid="true"] { border-color: var(--dns-color-warning); }
.dns-form__error { font-size: var(--dns-text-sm); color: var(--dns-color-warning); }
.dns-form__note { margin: 0; color: var(--dns-color-text-secondary); font-size: var(--dns-text-sm); }
.dns-form__link { text-decoration: underline; text-underline-offset: 3px; }
.dns-form__trap { position: absolute; left: -9999px; }
.dns-form .dns-btn { justify-self: start; margin-top: 4px; }
.dns-modal__check {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 50%;
  background: var(--dns-color-blue-mid);
  color: var(--dns-color-white);
}
.dns-modal__check-icon { width: 24px; height: 24px; }

@media (min-width: 768px) {
  .dns-header { top: calc(env(safe-area-inset-top, 0px) + 14px); }
  .dns-header__bar { gap: 24px; height: 76px; }
  .dns-header.dns-is-scrolled .dns-header__bar { height: 66px; }
  .dns-logo { flex: none; }
  .dns-logo__name { font-size: var(--dns-text-xl); }
  .dns-logo__tag { letter-spacing: .22em; }
  .dns-menu-btn { display: none; }

  .dns-nav {
    display: flex;
    position: static;
    flex: 1;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0;
    border-radius: 0;
    background: none;
    box-shadow: none;
  }
  .dns-nav__main { flex-direction: row; align-items: center; gap: 20px; margin-inline: auto; }
  .dns-nav__actions { flex-direction: row; align-items: center; gap: 16px; }
  .dns-nav__link { padding-block: 10px; border-bottom: 0; font-size: var(--dns-text-base); }
  .dns-nav .dns-btn { margin-top: 0; }

  .dns-backdrop__rings { left: -18%; top: -34%; }

  .dns-footer__top { align-items: flex-end; }
  .dns-footer__cols { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
  .dns-footer__bottom { flex-direction: row; flex-wrap: wrap; justify-content: space-between; align-items: center; }
}

@media (min-width: 1280px) {
  .dns-header__bar { gap: 40px; }
  .dns-nav { gap: 32px; }
  .dns-nav__main { gap: clamp(28px, 3.6vw, 56px); }
  .dns-nav__actions { gap: clamp(20px, 2.6vw, 40px); }
}

@media (prefers-reduced-motion: no-preference) {
  .dns-header { transition: transform .5s var(--dns-ease-out); }
  .dns-header__bar { transition: height .4s var(--dns-ease-out), box-shadow .3s ease; }
  .dns-nav__link, .dns-footer__link { transition: color .25s ease; }
  .dns-social__link, .dns-modal__close { transition: background .3s ease; }
  .dns-form__input { transition: border-color .2s ease; }

  .dns-backdrop::before { animation: dns-drift 24s ease-in-out infinite alternate; }
  .dns-backdrop__rings { animation: dns-breathe 9s ease-in-out infinite; }
  .dns-modal__scrim { animation: dns-fade .3s ease; }
  .dns-modal__card { animation: dns-modal-in .5s var(--dns-ease-out); }

  @keyframes dns-drift {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(-3%, 2%, 0) scale(1.04); }
    100% { transform: translate3d(2%, -2%, 0) scale(1.02); }
  }
  @keyframes dns-breathe {
    0%, 100% { transform: scale(1); opacity: .85; }
    50% { transform: scale(1.035); opacity: 1; }
  }
  @keyframes dns-fade { from { opacity: 0; } }
  @keyframes dns-modal-in { from { opacity: 0; transform: translateY(24px) scale(.98); } }
}