/* =========================================================
   ONT NAVIGATION (matches provided HTML exactly)
   HTML targets:
   .ont-nav
   .ont-nav__inner
   .ont-nav__desktop
   .ont-submenu
   .ont-nav__toggle
   .ont-nav__overlay
   .ont-drawer
   .ont-drawer__...
   ========================================================= */

:root{
  --ont-nav-h: 74px;
  --ont-nav-gap: 0.1px; /* gap under topbar */
  --ont-drawer-w: min(320px, 88vw);

  --ont-brown: #391a00;
  --ont-orange: #ef8e01;
  --ont-teal: #009e96;

  --ont-ink: #121722;
  --ont-white: #ffffff;
}

/* lock body when mobile drawer open */
body.nav-open{
  overflow: hidden;
}

/* -------------------------
   Header shell
-------------------------- */
.ont-nav{
  position: fixed;
  left: 0;
  width: 100%;
  top: calc(var(--topbar-h, 0px) + var(--ont-nav-gap));
  z-index: 1200;
  transition: top .28s ease;
}

/* when topbar is hidden on scroll (class added by JS) */
body.topbar-hidden .ont-nav{
  top: 12px;
}

.ont-nav__inner{
  position: relative;
  height: var(--ont-nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-inline: 14px;

  /* ultra light top state */
  background: linear-gradient(
    180deg,
    rgba(255,255,255,0.045),
    rgba(255,255,255,0.02)
  );
  border-block: 1px solid rgba(255,255,255,0.12);

  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);

  transition:
    background .28s ease,
    border-color .28s ease,
    box-shadow .28s ease;
}

/* institutional graphic accent (subtle chart motif) */
.ont-nav__inner::before{
  content: "";
  position: absolute;
  right: 14px;
  bottom: 8px;
  width: 108px;
  height: 20px;
  pointer-events: none;
  opacity: .22;
  border-radius: 999px;
  background:
    radial-gradient(circle at 14% 60%, rgba(0,158,150,.95) 0 2px, transparent 3px),
    radial-gradient(circle at 49% 35%, rgba(239,142,1,.95) 0 2px, transparent 3px),
    radial-gradient(circle at 82% 62%, rgba(57,26,0,.95) 0 2px, transparent 3px);
}

/* scrolled state = white premium bar */
.ont-nav.is-scrolled .ont-nav__inner{
  background:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(249,250,252,.94));
  border-block-color: rgba(18,23,34,.08);
  box-shadow:
    0 10px 24px rgba(10,14,24,.08),
    0 2px 8px rgba(10,14,24,.04);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* -------------------------
   Logo
-------------------------- */
.ont-nav__brand{
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  z-index: 3;
  line-height: 1;
}

.ont-nav__logo{
  display: block;
  width: auto;
  height: 40px;      /* prevents 0x0 */
  max-width: 185px;
  object-fit: contain;
}

/* optional top-state brightness for color logo on transparent header */
.ont-nav:not(.is-scrolled) .ont-nav__logo{
  filter: brightness(1.08) saturate(1.03);
}

/* -------------------------
   Desktop centered menu
-------------------------- */
.ont-nav__desktop{
  display: none; /* mobile first */
}

.ont-nav__list{
  list-style: none;
  margin: 0;
  padding: 0;
}

/* -------------------------
   Mobile button (dancing bars)
-------------------------- */
.ont-nav__toggle{
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 0;
  background: transparent;
  border-radius: 12px;
  cursor: pointer;
  z-index: 3;
  display: inline-grid;
  place-items: center;
}

/* small hover glass */
.ont-nav__toggle::before{
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 10px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.10);
  transition: .2s ease;
}
.ont-nav.is-scrolled .ont-nav__toggle::before{
  background: rgba(18,23,34,.03);
  border-color: rgba(18,23,34,.08);
}
.ont-nav__toggle:hover::before{
  transform: scale(1.03);
}

.ont-nav__toggle > span{
  position: absolute;
  left: 11px;
  width: 26px;
  height: 2.5px;
  border-radius: 999px;
  display: block;
  background: #fff; /* visible at top transparent state */
  transform-origin: left center;
  transition: transform .25s ease, opacity .2s ease, background-color .2s ease;
  animation: ontNavDance .65s ease-in-out infinite alternate;
}

.ont-nav.is-scrolled .ont-nav__toggle > span{
  background: #171b24; /* visible on white state */
}

.ont-nav__toggle > span:nth-child(1){ top: 15px; }
.ont-nav__toggle > span:nth-child(2){ top: 22px; animation-delay: .12s; }
.ont-nav__toggle > span:nth-child(3){ top: 29px; animation-delay: .24s; }

@keyframes ontNavDance{
  from { transform: scaleX(1); }
  to   { transform: scaleX(.62); }
}

/* morph to X when open */
body.nav-open .ont-nav__toggle > span{
  animation: none;
}
body.nav-open .ont-nav__toggle > span:nth-child(1){
  top: 22px;
  transform: rotate(45deg);
}
body.nav-open .ont-nav__toggle > span:nth-child(2){
  opacity: 0;
}
body.nav-open .ont-nav__toggle > span:nth-child(3){
  top: 22px;
  transform: rotate(-45deg);
}

/* -------------------------
   Overlay
-------------------------- */
.ont-nav__overlay{
  position: fixed;
  inset: 0;
  z-index: 1180;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .25s ease, visibility .25s ease;

  background:
    radial-gradient(circle at 18% 12%, rgba(0,158,150,.16), transparent 42%),
    radial-gradient(circle at 82% 20%, rgba(239,142,1,.12), transparent 46%),
    rgba(8,10,16,.50);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

body.nav-open .ont-nav__overlay{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* -------------------------
   Mobile drawer
-------------------------- */
.ont-drawer{
  position: fixed;
  top: 0;
  left: 0;
  width: var(--ont-drawer-w);
  height: 100dvh;
  z-index: 1190; /* above overlay */
  transform: translateX(-110%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    transform .32s cubic-bezier(.22,.8,.2,1),
    opacity .22s ease,
    visibility .22s ease;

  color: #fff;
  background:
    linear-gradient(180deg, rgba(18,22,30,.92), rgba(10,12,18,.96));
  border-right: 1px solid rgba(255,255,255,.08);
  box-shadow: 20px 0 42px rgba(0,0,0,.26);

  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);

  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* subtle internal graphics */
.ont-drawer::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background:
    radial-gradient(circle at 18% 6%, rgba(0,158,150,.20), transparent 36%),
    radial-gradient(circle at 90% 16%, rgba(239,142,1,.16), transparent 40%);
}
.ont-drawer::after{
  content: "";
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 104px;
  height: 54px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
  opacity: .24;
  pointer-events: none;
  background:
    radial-gradient(circle at 16% 68%, rgba(0,158,150,.95) 0 2px, transparent 3px),
    radial-gradient(circle at 52% 38%, rgba(239,142,1,.95) 0 2px, transparent 3px),
    radial-gradient(circle at 84% 58%, rgba(255,255,255,.9) 0 2px, transparent 3px);
}

body.nav-open .ont-drawer{
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* drawer top */
.ont-drawer__head{
  position: relative;
  z-index: 1;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.ont-drawer__logo{
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 1;
}

.ont-drawer__logo img{
  display: block;
  height: 34px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}

.ont-drawer__close{
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  color: #fff;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  transition: .2s ease;
}

.ont-drawer__close:hover{
  background: rgba(255,255,255,.09);
  transform: translateY(-1px);
}
.ont-drawer__close i{
  font-size: 1.25rem;
  line-height: 1;
}

/* drawer nav body */
.ont-drawer__nav{
  position: relative;
  z-index: 1;
  flex: 1;
  overflow-y: auto;
  padding: 8px 10px 12px;
}

.ont-drawer__nav::-webkit-scrollbar{ width: 8px; }
.ont-drawer__nav::-webkit-scrollbar-thumb{
  background: rgba(255,255,255,.14);
  border-radius: 999px;
}

.ont-drawer__list{
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(255,255,255,.08);
}

.ont-drawer__item{
  border-bottom: 1px solid rgba(255,255,255,.08);
}

/* mobile links/buttons */
.ont-drawer__link{
  width: 100%;
  min-height: 54px;
  border: 0;
  background: transparent;
  color: rgba(255,255,255,.95);
  text-decoration: none;
  font: inherit;
  font-weight: 600;
  font-size: 1rem; /* bigger as requested */
  letter-spacing: .01em;
  line-height: 1.2;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 6px 12px 4px;
  cursor: pointer;
  transition: .2s ease;
}

a.ont-drawer__link{
  justify-content: flex-start;
}

.ont-drawer__link:hover{
  color: #fff;
  background: rgba(255,255,255,.03);
}

.ont-drawer__link i{
  font-size: 1rem;
  opacity: .85;
  transition: transform .2s ease;
}

/* mobile submenu */
.ont-drawer-submenu{
  display: grid;
  gap: 0;
  padding: 0 0 6px 0;
  margin: 0;
}

.ont-drawer-submenu a{
  display: block;
  padding: 10px 10px 10px 18px;
  margin-left: 8px;
  border-left: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: .92rem;
  line-height: 1.35;
  transition: .2s ease;
}
.ont-drawer-submenu a:hover{
  color: #fff;
  background: rgba(255,255,255,.03);
  border-left-color: rgba(239,142,1,.55);
}

.ont-drawer__item.is-open > .ont-drawer__link i{
  transform: rotate(180deg);
}

/* contact block */
.ont-drawer__contact{
  position: relative;
  z-index: 1;
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  display: grid;
  gap: 10px;
}

.ont-drawer__socials{
  display: flex;
  align-items: center;
  gap: 8px;
}

.ont-drawer__socials a{
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  transition: .2s ease;
}
.ont-drawer__socials a:hover{
  transform: translateY(-2px);
  background: rgba(255,255,255,.09);
}

.ont-drawer__meta strong{
  display: block;
  margin-bottom: 3px;
  color: rgba(255,255,255,.96);
  font-size: .84rem;
  letter-spacing: .02em;
}
.ont-drawer__meta p{
  margin: 0;
  color: rgba(255,255,255,.82);
  font-size: .9rem;
  line-height: 1.45;
}

/* -------------------------
   Desktop styles
-------------------------- */
@media (min-width: 998px){

  .ont-nav__inner{
    height: 78px;
    padding-inline: 18px;

    justify-content: right;
    border-radius: 1.6rem;
  }

  .ont-nav__brand{
    left: 16px;
  }

  .ont-nav__logo{
    height: 42px;
    max-width: 210px;
  }

  /* show desktop nav, hide mobile controls */
  .ont-nav__desktop{
    display: block;
  }

  .ont-nav__toggle,
  .ont-nav__overlay,
  .ont-drawer{
    display: none !important;
  }

  .ont-nav__list{
    display: flex;
    align-items: right;
    gap: 4px;
  }

  .ont-nav__item{
    position: relative;
  }

  .ont-nav__link{
    height: 46px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid transparent;
    background: transparent;
    font: inherit;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: .01em;
    text-decoration: none;
    cursor: pointer;

    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: .2s ease;
    color: #fff; /* top transparent state */
  }

  /* top transparent hover */
  .ont-nav:not(.is-scrolled) .ont-nav__link:hover,
  .ont-nav:not(.is-scrolled) .ont-nav__item.is-open > .ont-nav__link{
    background: rgba(255,255,255,.08);
    border-color: rgba(255,255,255,.13);
    color: #fff;
  }

  /* scrolled header text = dark */
  .ont-nav.is-scrolled .ont-nav__link{
    color: var(--ont-ink);
  }

  .ont-nav.is-scrolled .ont-nav__link:hover,
  .ont-nav.is-scrolled .ont-nav__item.is-open > .ont-nav__link{
    background: rgba(18,23,34,.04);
    border-color: rgba(18,23,34,.07);
    color: #0f172a;
  }

  .ont-submenu-toggle i{
    font-size: .95rem;
    opacity: .85;
    transition: transform .2s ease;
  }

  .ont-nav__item.has-submenu.is-open > .ont-nav__link i{
    transform: rotate(180deg);
  }

  /* desktop submenu panel */
  .ont-submenu{
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 240px;
    padding: 8px;
    border-radius: 14px;

    background:
      linear-gradient(180deg, rgba(255,255,255,.97), rgba(252,252,253,.95));
    border: 1px solid rgba(18,23,34,.08);
    box-shadow:
      0 16px 32px rgba(11,16,32,.12),
      0 4px 10px rgba(11,16,32,.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(6px);
    transition: .2s ease;
    z-index: 20;
  }

  .ont-submenu a{
    display: flex;
    align-items: center;
    min-height: 40px;
    padding: 8px 10px;
    border-radius: 10px;
    text-decoration: none;
    color: #1a2230;
    font-weight: 500;
    font-size: .94rem;
    transition: .18s ease;
  }

  .ont-submenu a:hover{
    background: rgba(18,23,34,.04);
    transform: translateX(2px);
  }

  /* open on hover + JS class for click support */
  .ont-nav__item.has-submenu:hover > .ont-submenu,
  .ont-nav__item.has-submenu:focus-within > .ont-submenu,
  .ont-nav__item.has-submenu.is-open > .ont-submenu{
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
}

/* -------------------------
   Small mobile tweak
-------------------------- */
@media (max-width: 576px){
  .ont-nav__inner{
    height: 70px;
    padding-inline: 10px;
  }

  .ont-nav__logo{
    height: 36px;
    max-width: 165px;
  }

  .ont-drawer{
    width: min(300px, 88vw);
  }
}