/* UM Header — legacy um site top-nav */

:root {
  --um-header-height: 60px;
  --um-header-lang-size: 12px;
  --um-header-bg: rgba(10, 10, 10, 0.4);
  --um-header-backdrop: blur(15px);
  --um-header-border: rgba(255, 255, 255, 0.05);
  --um-header-fg: #c8c4be;
  --um-header-fg-active: #ffffff;
  /* UM site accent (matches existing purple CTAs on UM pages) */
  --um-header-accent: #a259ff;
  --um-header-font: 'DM Mono', monospace;
}

.um-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--um-header-height);
  z-index: 1000;
  background: var(--um-header-bg);
  backdrop-filter: var(--um-header-backdrop);
  -webkit-backdrop-filter: var(--um-header-backdrop);
  border-bottom: 1px solid var(--um-header-border);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  padding: 0 48px;
  box-sizing: border-box;
}

.um-mind-brand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--um-header-font);
  font-size: var(--um-header-lang-size);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.um-mind-hub {
  color: var(--um-header-fg);
  text-decoration: none;
  transition: color 0.2s;
}

.um-mind-hub:hover {
  color: #f0ede8;
}

.um-mind-dot {
  color: rgba(200, 196, 190, 0.42);
  user-select: none;
  font-weight: 400;
  letter-spacing: 0.12em;
}

.um-mind-here {
  color: var(--um-header-accent);
  font-weight: 500;
  text-decoration: none;
  font-size: inherit;
  letter-spacing: 0.2em;
  transition: opacity 0.2s, color 0.2s;
}

.um-mind-here:hover {
  opacity: 0.92;
}

.um-nav-links {
  display: flex;
  gap: 14px;
  justify-self: center;
  margin-left: 0;
}

.um-nav-links a {
  font-family: var(--um-header-font);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--um-header-fg);
  text-decoration: none;
  transition: color 0.2s;
}

.um-nav-links a:hover {
  color: #f0ede8;
}

/* SUMAI — normal link style */
.um-header .um-nav-links a.um-nav-sumai,
.um-header .um-nav-drawer a.um-nav-sumai {
  color: var(--um-header-fg);
  font-weight: 400;
}

.um-header .um-nav-links a.um-nav-sumai:hover,
.um-header .um-nav-drawer a.um-nav-sumai:hover {
  color: #f0ede8;
}

.um-nav-links a.coming {
  opacity: 0.35;
  cursor: not-allowed;
}

.um-nav-links a.coming:hover {
  color: var(--um-header-fg);
}

.um-nav-right {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 14px;
}

.um-lang-sw {
  display: flex;
  gap: 10px;
  font-family: var(--um-header-font);
  font-size: var(--um-header-lang-size);
  font-weight: 600;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 4px;
  background: #111;
  user-select: none;
}

.um-lang-sw a {
  color: #aaa;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 3px;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.um-lang-sw a.on {
  background-color: #333;
  color: #fff;
  font-weight: 700;
}

.um-lang-sw a:hover:not(.on) {
  background-color: #555;
  color: #fff;
  cursor: pointer;
}

.um-nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--um-header-fg);
  -webkit-tap-highlight-color: transparent;
}

.um-nav-burger span {
  display: block;
  height: 2px;
  width: 22px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.um-header.is-open .um-nav-burger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.um-header.is-open .um-nav-burger span:nth-child(2) {
  opacity: 0;
}

.um-header.is-open .um-nav-burger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.um-nav-drawer {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  padding: 8px 20px 20px;
  background: var(--um-header-bg);
  backdrop-filter: var(--um-header-backdrop);
  -webkit-backdrop-filter: var(--um-header-backdrop);
  border-bottom: 1px solid var(--um-header-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  z-index: 220;
}

.um-nav-drawer a {
  font-family: var(--um-header-font);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--um-header-fg);
  text-decoration: none;
  padding: 14px 0;
  border-bottom: 1px solid var(--um-header-border);
  transition: color 0.2s;
}

.um-nav-drawer a:last-child {
  border-bottom: none;
}

.um-header.is-open .um-nav-drawer {
  display: flex;
}

.um-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--um-header-height);
  background: rgba(0, 0, 0, 0.45);
  z-index: 999;
  border: none;
  cursor: pointer;
}

.um-header.is-open ~ .um-nav-overlay {
  display: block;
}

@media (max-width: 680px) {
  .um-header {
    padding: 0 16px;
    grid-template-columns: 1fr auto;
    grid-template-rows: var(--um-header-height) auto;
  }

  .um-mind-brand {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
    max-width: none;
  }

  .um-nav-links {
    display: none;
  }

  .um-nav-right {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    gap: 10px;
  }

  .um-nav-burger {
    display: flex;
    width: 48px;
    height: 48px;
    gap: 6px;
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
  }

  .um-nav-burger span {
    width: 26px;
    height: 3px;
    background: currentColor;
  }

  .um-header.is-open .um-nav-burger span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  .um-header.is-open .um-nav-burger span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .um-lang-sw {
    font-size: 11px;
    padding: 6px 8px;
  }

  .um-lang-sw a {
    padding: 6px 10px;
  }

  /* Drawer — slide in from right */
  .um-nav-drawer {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--um-header-height);
    right: 0;
    left: auto;
    width: min(300px, 88vw);
    height: calc(100vh - var(--um-header-height));
    height: calc(100dvh - var(--um-header-height));
    padding: 28px 28px 40px;
    border-left: 1px solid var(--um-header-border);
    border-bottom: none;
    box-shadow: -16px 0 48px rgba(0, 0, 0, 0.55);
    transform: translateX(100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.28s ease, visibility 0.28s ease;
    z-index: 1001;
  }

  .um-header.is-open .um-nav-drawer {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }

  .um-nav-drawer a {
    font-size: 12px;
    letter-spacing: 0.22em;
    padding: 18px 0;
  }
}