/* ------------------------------------------------------------------
   EMET ONE / mobile navigation sheet + scroll behaviour
   Owns .mobileBtn, .mobilePanel and the nav scroll indicator.
   The sheet is a native popover, so it renders in the top layer and
   gets light-dismiss, Escape and focus containment from the platform.
------------------------------------------------------------------- */

:root {
  --navh: 72px;
  --sheet-ease: var(--ease);
  --sheet-spring: var(--spring);
}

/* Anchor jumps used to land under the sticky nav. */
html {
  scroll-padding-top: calc(var(--navh) + 18px);
}

/* Scroll position rendered by the compositor, not by a scroll listener.
   Fixed to the viewport rather than parented to .nav, so it survives the
   nav's hide-on-scroll transform and stays readable the whole way down. */
@supports (animation-timeline: scroll()) {
  body:before {
    content: "";
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    height: 2px;
    z-index: 95;
    pointer-events: none;
    transform: scaleX(0);
    transform-origin: 0 50%;
    background: linear-gradient(90deg, var(--blue), #6a5cff);
    animation: e1ScrollProgress linear both;
    animation-timeline: scroll(root block);
  }
  @keyframes e1ScrollProgress {
    to { transform: scaleX(1); }
  }
}

/* Desktop: no trigger, no sheet. Declared before the mobile block so the
   mobile rules win the cascade rather than being overridden by source order. */
.mobileBtn { display: none; }
.mobilePanel { display: none; }
.menuBackdrop { display: none; }

@media (max-width: 760px) {
  :root { --navh: 66px; }

  /* ---------------------------------------------------- TRIGGER */
  .mobileBtn {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: rgba(255, 255, 255, .72);
    backdrop-filter: blur(12px) saturate(140%);
    font-size: 0;
    position: relative;
    z-index: 92;
    -webkit-tap-highlight-color: transparent;
    transition: transform .4s var(--sheet-spring), background .3s var(--sheet-ease);
  }
  .mobileBtn:active { transform: scale(.93); }

  .mobileBtn i {
    position: absolute;
    width: 17px;
    height: 1.6px;
    border-radius: 4px;
    background: var(--ink);
    transition: transform .46s var(--sheet-spring), opacity .2s var(--sheet-ease), width .4s var(--sheet-spring);
  }
  .mobileBtn i:nth-child(1) { transform: translateY(-5.5px); }
  .mobileBtn i:nth-child(2) { width: 11px; transform: translate(3px, 5.5px); }

  .mobileBtn[aria-expanded="true"] { background: var(--ink); }
  .mobileBtn[aria-expanded="true"] i { background: #fff; width: 17px; }
  .mobileBtn[aria-expanded="true"] i:nth-child(1) { transform: rotate(45deg); }
  .mobileBtn[aria-expanded="true"] i:nth-child(2) { transform: rotate(-45deg); }

  /* ------------------------------------------------------ SHEET */
  .mobilePanel {
    /* reset the popover UA box */
    position: fixed;
    inset: auto 0 0 0;
    width: 100%;
    max-width: 100%;
    max-height: 100%;
    margin: 0;
    border: 0;
    padding: 0;
    overflow: visible;
    color: var(--ink);

    display: none;
    flex-direction: column;
    max-height: min(90dvh, 780px);
    border-radius: 30px 30px 0 0;
    background: linear-gradient(180deg, rgba(255, 253, 248, .97), rgba(246, 243, 236, .97));
    box-shadow: 0 -1px 0 rgba(255, 255, 255, .8) inset,
                0 -34px 90px rgba(17, 17, 17, .28);
    backdrop-filter: blur(26px) saturate(150%);

    transform: translateY(101%);
    transition:
      transform .6s var(--sheet-spring),
      display .6s allow-discrete,
      overlay .6s allow-discrete;
  }
  .mobilePanel:popover-open { display: flex; transform: none; }
  @starting-style {
    .mobilePanel:popover-open { transform: translateY(101%); }
  }

  /* hairline top edge that catches the light */
  .mobilePanel:before {
    content: "";
    position: absolute;
    left: 24px;
    right: 24px;
    top: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(47, 91, 255, .5), rgba(123, 77, 255, .4), transparent);
  }

  .mobilePanel::backdrop {
    background: rgba(12, 11, 9, .34);
    backdrop-filter: blur(16px) saturate(120%);
    opacity: 0;
    transition:
      opacity .46s var(--sheet-ease),
      display .46s allow-discrete,
      overlay .46s allow-discrete;
  }
  .mobilePanel:popover-open::backdrop { opacity: 1; }
  @starting-style {
    .mobilePanel:popover-open::backdrop { opacity: 0; }
  }

  /* dragging: follow the finger with no transition fighting it */
  .mobilePanel.dragging { transition: none; }

  /* ----------------------------------------------------- GRIP */
  .sheetGrip {
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    height: 26px;
    margin-top: 6px;
    touch-action: none;
    cursor: grab;
  }
  .sheetGrip span {
    width: 42px;
    height: 4px;
    border-radius: 99px;
    background: rgba(17, 17, 17, .18);
    transition: width .4s var(--sheet-spring), background .3s var(--sheet-ease);
  }
  .mobilePanel.dragging .sheetGrip span { width: 58px; background: rgba(17, 17, 17, .3); }

  /* --------------------------------------------------- HEADER */
  .sheetHead {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 2px 20px 14px;
    touch-action: none;
  }
  .sheetBrand {
    display: flex;
    align-items: center;
    gap: 11px;
    border-radius: 12px;
    -webkit-tap-highlight-color: transparent;
    transition: transform .34s var(--sheet-spring);
  }
  .sheetBrand:active { transform: scale(.97); }
  .sheetHead img { width: 42px; height: 32px; object-fit: contain; flex: 0 0 42px; }
  .sheetHead .t { display: block; line-height: 1; }
  .sheetHead strong { display: block; font-size: 15px; letter-spacing: -.045em; }
  .sheetHead small {
    display: block;
    margin-top: 4px;
    font: 500 7.5px/1 "IBM Plex Mono", monospace;
    letter-spacing: .105em;
    color: var(--muted);
  }
  .sheetClose {
    margin-left: auto;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, .6);
    font: 500 15px/1 Inter, sans-serif;
    color: var(--muted);
    -webkit-tap-highlight-color: transparent;
    transition: transform .34s var(--sheet-spring), color .2s;
  }
  .sheetClose:active { transform: scale(.9); color: var(--ink); }

  /* ----------------------------------------------------- LINKS */
  .sheetNav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: 0 12px;
    scrollbar-width: thin;
    scrollbar-color: rgba(17, 17, 17, .22) transparent;
    /* fade the list where it runs under the CTA */
    mask-image: linear-gradient(180deg, transparent 0, #000 14px, #000 calc(100% - 10px), transparent 100%);
  }

  .sheetNav a {
    --d: calc(var(--i) * 30ms + 60ms);
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 60px;
    padding: 0 12px;
    border-radius: 16px;
    font-size: 21px;
    letter-spacing: -.035em;
    -webkit-tap-highlight-color: transparent;
  }
  /* Keyframes, not transitions: a popover's children enter the rendering
     tree with no previous style, so there is nothing to transition from. */
  .mobilePanel:popover-open .sheetNav a,
  .mobilePanel.open .sheetNav a {
    animation: e1Row .52s var(--sheet-spring) var(--d) both;
  }
  @keyframes e1Row {
    from { opacity: 0; transform: translateY(22px); filter: blur(6px); }
    to { opacity: 1; transform: none; filter: none; }
  }

  /* hairline that draws in under each row */
  .sheetNav a + a:before {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    top: 0;
    height: 1px;
    background: var(--line);
    transform-origin: 0 50%;
  }
  .mobilePanel:popover-open .sheetNav a + a:before,
  .mobilePanel.open .sheetNav a + a:before {
    animation: e1Line .46s var(--sheet-ease) var(--d) both;
  }
  @keyframes e1Line {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
  }

  .sheetNav .n {
    flex: 0 0 auto;
    font: 500 10px/1 "IBM Plex Mono", monospace;
    letter-spacing: .08em;
    color: #9b958c;
    transition: color .3s var(--sheet-ease);
  }
  .sheetNav .l { flex: 1 1 auto; }
  .sheetNav .c {
    flex: 0 0 auto;
    font: 500 13px/1 "IBM Plex Mono", monospace;
    color: #b3ada3;
    transition: transform .4s var(--sheet-spring), color .3s;
  }

  .sheetNav a:active {
    background: rgba(47, 91, 255, .07);
  }
  .sheetNav a:active .c { transform: translate(4px, -4px); color: var(--blue); }

  .sheetNav a[aria-current] { font-weight: 600; }
  .sheetNav a[aria-current] .n { color: var(--blue); }
  .sheetNav a[aria-current]:after {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 4px;
    height: 20px;
    margin-top: -10px;
    border-radius: 0 4px 4px 0;
    background: var(--blue);
  }

  /* ------------------------------------------------------- CTA */
  .sheetFoot {
    flex: 0 0 auto;
    display: grid;
    gap: 12px;
    padding: 14px 20px calc(18px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(246, 243, 236, 0), rgba(246, 243, 236, .9));
  }
  .mobilePanel:popover-open .sheetFoot,
  .mobilePanel.open .sheetFoot {
    animation: e1Foot .5s var(--sheet-spring) .18s both;
  }
  @keyframes e1Foot {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: none; }
  }

  .sheetCta {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 56px;
    border-radius: 18px;
    background: var(--ink);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -.02em;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    transition: transform .34s var(--sheet-spring);
  }
  .sheetCta:active { transform: scale(.975); }
  /* light sweeps across the button as the sheet settles */
  .sheetCta:before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, transparent 32%, rgba(255, 255, 255, .22) 48%, transparent 64%);
    transform: translateX(-120%);
  }
  .mobilePanel:popover-open .sheetCta:before {
    animation: e1Sweep 1.1s var(--sheet-ease) .42s both;
  }
  @keyframes e1Sweep {
    to { transform: translateX(120%); }
  }

  .sheetTag {
    text-align: center;
    font: 500 8px/1 "IBM Plex Mono", monospace;
    letter-spacing: .14em;
    color: var(--muted);
  }

  /* the page must not scroll behind the sheet */
  html.menuLock, html.menuLock body { overflow: hidden; }
}

/* Wider phones and small tablets keep the sheet but relax the type. */
@media (max-width: 760px) and (min-width: 560px) {
  .mobilePanel {
    inset: auto 0 0 0;
    margin: 0 auto;
    max-width: 520px;
    border-radius: 30px 30px 0 0;
  }
}

/* Landscape phones: short viewport, tighten everything. */
@media (max-width: 760px) and (max-height: 520px) {
  .mobilePanel { max-height: 94dvh; }
  .sheetNav a { min-height: 48px; font-size: 18px; }
  .sheetHead { padding-bottom: 10px; }
  .sheetCta { min-height: 48px; }
}

/* No-popover fallback: class-driven, same look. */
@media (max-width: 760px) {
  .mobilePanel.open { display: flex; transform: none; }
  .menuBackdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 79;
    background: rgba(12, 11, 9, .34);
    backdrop-filter: blur(16px) saturate(120%);
    opacity: 0;
    pointer-events: none;
    transition: opacity .42s var(--sheet-ease);
  }
  .mobilePanel.open ~ .menuBackdrop, .menuBackdrop.open { opacity: 1; pointer-events: auto; }
  .mobilePanel:not([popover]) { z-index: 80; }
}

@media (prefers-reduced-motion: reduce) {
  .mobilePanel,
  .mobilePanel::backdrop,
  .mobilePanel .sheetNav a,
  .mobileBtn i,
  .sheetGrip span { transition-duration: .01ms !important; transition-delay: 0s !important; }
  .mobilePanel { transform: none; }
  .mobilePanel .sheetNav a,
  .mobilePanel .sheetNav a + a:before,
  .mobilePanel .sheetFoot { animation: none !important; filter: none; transform: none; opacity: 1; }
  .mobilePanel:popover-open .sheetCta:before { animation: none; }
  @supports (animation-timeline: scroll()) {
    body:before { animation: none; transform: scaleX(0); }
  }
}