/* ==========================================================================
   Tidepool · shell, ambient background, navigation, sidebar, footer
   ========================================================================== */

[hidden] {
  display: none !important;
}

/* -- ambient background -------------------------------------------------- */

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% -10%, var(--primary-faint), transparent 60%),
    linear-gradient(180deg, var(--page-bg), var(--page-bg-deep));
}

.ambient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.55;
  will-change: transform;
}

.ambient-blob--one {
  width: 46vw;
  height: 46vw;
  top: -14vw;
  right: -10vw;
  background: radial-gradient(circle, oklch(0.62 0.13 var(--hue) / 0.34), transparent 68%);
  animation: drift-a 26s var(--ease) infinite alternate;
}

.ambient-blob--two {
  width: 38vw;
  height: 38vw;
  bottom: -16vw;
  left: -12vw;
  background: radial-gradient(circle, oklch(0.68 0.16 var(--accent-hue) / 0.22), transparent 66%);
  animation: drift-b 32s var(--ease) infinite alternate;
}

.ambient-blob--three {
  width: 26vw;
  height: 26vw;
  top: 42%;
  left: 52%;
  background: radial-gradient(circle, oklch(0.62 0.13 var(--hue) / 0.16), transparent 70%);
  animation: drift-c 22s var(--ease) infinite alternate;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.18;
  mask-image: radial-gradient(90% 60% at 50% 0%, #000 0%, transparent 80%);
}

html.dark .ambient {
  background:
    radial-gradient(120% 90% at 50% -10%, oklch(0.3 0.05 var(--hue) / 0.35), transparent 60%),
    linear-gradient(180deg, var(--page-bg), var(--page-bg-deep));
}

html.dark .ambient-blob {
  opacity: 0.42;
}

.tide-line {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.85;
  pointer-events: none;
}

@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-4vw, 5vw, 0) scale(1.08); }
}

@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(5vw, -4vw, 0) scale(1.12); }
}

@keyframes drift-c {
  from { transform: translate3d(-2vw, 0, 0) scale(0.96); }
  to { transform: translate3d(3vw, -3vw, 0) scale(1.06); }
}

/* -- navigation ---------------------------------------------------------- */

.site-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--page-width);
  min-height: 100vh;
  min-height: 100dvh;
  margin-inline: auto;
  padding: 0 var(--container-pad) 2rem;
}

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 12px 0 0;
}



.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  height: var(--nav-height);
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-bg-glass);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.nav.is-scrolled {
  border-color: var(--border-strong);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 4px 8px 4px 4px;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease);
}

.brand:hover {
  background: var(--primary-faint);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 13px;
  color: var(--primary-contrast);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.25), 0 6px 16px -8px var(--primary);
}

.brand-mark .icon {
  width: 1.4rem;
  height: 1.4rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-sub {
  margin-top: 3px;
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.nav-links {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 6px;
}

.nav-indicator {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: var(--ind-w, 0px);
  height: var(--ind-h, 2.4rem);
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  opacity: 1;
  transform: translate3d(var(--ind-x, 0px), var(--ind-y, 0px), 0);
  pointer-events: none;
  will-change: transform, width;
}

.nav-indicator.is-ready {
  transition:
    transform 0.44s var(--ease-out),
    width 0.44s var(--ease-out),
    height 0.34s var(--ease-out),
    border-radius 0.34s var(--ease-out),
    background var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
}

.nav-indicator.is-hidden {
  opacity: 0;
}

.nav-indicator-dot {
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  transform: translateX(-50%);
}

.nav-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 2.4rem;
  padding: 0 0.78rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 0.86rem;
  font-weight: 600;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.nav-link .icon {
  width: 1.05rem;
  height: 1.05rem;
  opacity: 0.7;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-faint);
}

.nav-link:hover .icon {
  opacity: 1;
}

.nav-link.is-active {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-link.is-active .icon {
  opacity: 1;
}

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  transform: translateX(-50%);
}

.nav-links.has-indicator .nav-link.is-active {
  background: transparent;
}

.nav-links.has-indicator .nav-link.is-active::after {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: auto;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease);
}

.icon-btn .icon {
  width: 1.2rem;
  height: 1.2rem;
}

.icon-btn:hover {
  color: var(--primary);
  background: var(--primary-faint);
}

.icon-btn:active {
  transform: scale(0.92);
}

.nav-popover-wrap {
  position: relative;
}

.palette-pop {
  position: absolute;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
  top: calc(100% + 14px);
  right: 0;
  width: 13rem;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  box-shadow: var(--shadow-md);
  animation: pop-in var(--dur) var(--ease-out);
}

.palette-pop.is-closing {
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
}

.popover-title {
  padding: 0 0.3rem 0.5rem;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.palette-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem;
  border-radius: var(--radius-xs);
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 600;
  text-align: left;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.palette-item:hover {
  color: var(--primary);
  background: var(--primary-faint);
}

.palette-item.is-active {
  color: var(--primary);
  background: var(--primary-soft);
}

.palette-swatch {
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px oklch(1 0 0 / 0.4), 0 1px 3px oklch(0 0 0 / 0.2);
}

.palette-swatch[data-swatch="tide"] { background: linear-gradient(135deg, oklch(0.62 0.13 195), oklch(0.68 0.16 24)); }
.palette-swatch[data-swatch="abyss"] { background: linear-gradient(135deg, oklch(0.58 0.14 258), oklch(0.68 0.16 332)); }
.palette-swatch[data-swatch="coral"] { background: linear-gradient(135deg, oklch(0.66 0.16 28), oklch(0.62 0.13 196)); }
.palette-swatch[data-swatch="kelp"] { background: linear-gradient(135deg, oklch(0.6 0.13 152), oklch(0.7 0.15 46)); }

.theme-icon {
  display: grid;
  place-items: center;
}

.menu-btn {
  display: none;
}

@keyframes pop-in {
  from { opacity: 0; transform: translateY(-6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* -- mobile menu --------------------------------------------------------- */

.mobile-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 70;
  display: none;
  max-height: calc(100vh - var(--nav-height) - 2rem);
  max-height: calc(100dvh - var(--nav-height) - 2rem);
  overflow-y: auto;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow-md);
  animation: menu-in var(--dur) var(--ease-out);
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mobile-link {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 600;
}

.mobile-link:hover,
.mobile-link.is-active {
  color: var(--primary);
  background: var(--primary-faint);
}

.mobile-link-icon {
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 9px;
  color: var(--primary);
  background: var(--primary-soft);
}

.mobile-link-arrow {
  margin-left: auto;
  width: 1rem;
  height: 1rem;
  color: var(--text-faint);
}

.mobile-menu-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.75rem;
  padding: 0.75rem 0.8rem 0.25rem;
  border-top: 1px solid var(--divider);
  color: var(--text-mute);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.palette-grid--inline {
  grid-template-columns: repeat(4, auto);
}

.palette-grid--inline .palette-item {
  padding: 0.25rem;
}

.palette-grid--inline .palette-item span:last-child {
  display: none;
}

@keyframes menu-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* -- site grid ----------------------------------------------------------- */

.site-grid {
  flex: 1 0 auto;
  display: grid;
  grid-template-columns: calc(var(--sidebar-width) * var(--sidebar-scale, 1)) minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
  margin-top: var(--gap);
}

.sidebar {
  position: fixed;
  top: calc(12px + var(--nav-height) + var(--gap));
  left: max(var(--container-pad), calc(50% - (var(--page-width) / 2) + var(--container-pad)));
  z-index: 30;
  width: var(--sidebar-width);
  transform: scale(var(--sidebar-scale, 1)) rotate(0.01deg);
  transform-origin: top left;
}

.sidebar.is-friends-open {
  z-index: 80;
}

@supports (zoom: 1) {
  .sidebar {
    width: calc(var(--sidebar-width) * var(--sidebar-scale, 1));
    transform: none;
  }

  .sidebar-inner {
    width: var(--sidebar-width);
    zoom: var(--sidebar-scale, 1);
  }
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 0.45rem;
}

.main {
  grid-column: 2;
  min-width: 0;
  outline: none;
}

body.sidebar-hidden .sidebar {
  display: none;
}

body.sidebar-hidden .site-grid {
  grid-template-columns: minmax(0, 1fr);
}

body.sidebar-hidden .main {
  grid-column: 1;
}

.main-inner {
  min-height: 40vh;
}

/* -- sidebar footer ------------------------------------------------------ */

.sidebar-footer {
  padding: 0.7rem 0.85rem;
  text-align: center;
}

.sidebar-footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 700;
}

.sidebar-footer-brand > span:last-child {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
}

.sidebar-footer-mark {
  display: grid;
  place-items: center;
  color: var(--primary);
}

.sidebar-footer-mark .icon {
  width: 0.95rem;
  height: 0.95rem;
}

.sidebar-footer-tagline {
  margin-top: 0.22rem;
  color: var(--text-faint);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
}

.sidebar-footer-meta {
  margin-top: 0.25rem;
  color: var(--text-mute);
  font-size: 0.62rem;
  line-height: 1.6;
}

.sidebar-footer-meta a {
  color: var(--text-soft);
  font-weight: 600;
}

.sidebar-footer-meta a:hover {
  color: var(--primary);
}

/* -- responsive shell ---------------------------------------------------- */

@media (max-width: 1180px) {
  .nav-links {
    display: none;
  }

  .menu-btn {
    display: inline-grid;
  }

  .mobile-menu {
    display: block;
  }

  .site-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    display: none;
  }

  .main {
    grid-column: 1;
  }

}

@media (max-width: 760px) {
  :root {
    --gap: 1rem;
    --nav-height: 3.9rem;
  }

  .site-shell {
    padding: 0 0.85rem 1.5rem;
  }

  .nav-wrap {
    padding-top: 0.6rem;
  }

  .nav {
    height: var(--nav-height);
    padding: 0 0.5rem;
    border-radius: var(--radius-md);
  }

  .brand-sub {
    display: none;
  }

  .brand-mark {
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 11px;
  }

  .icon-btn {
    width: 2.35rem;
    height: 2.35rem;
  }

}

@media (max-width: 420px) {
  .brand-text {
    display: none;
  }

  .nav-actions {
    gap: 0;
  }
}

/* -- swup page transition ------------------------------------------------ */

html.is-changing .transition-main {
  transition: opacity 0.2s var(--ease);
  will-change: opacity;
}

html.is-animating .transition-main {
  opacity: 0;
}

html.is-rendering .transition-main {
  opacity: 1;
}

/* Keep mobile scrolling smooth: drop the expensive ambient paint work. */
@media (max-width: 760px) {
  .ambient-blob {
    animation: none;
    filter: blur(44px);
    opacity: 0.32;
  }

  .ambient-grid {
    display: none;
  }

  .nav {
    backdrop-filter: blur(12px) saturate(130%);
    -webkit-backdrop-filter: blur(12px) saturate(130%);
  }
}