/* "How to use WebDrop" tour: how-to FAB + swipeable card carousel presented
   as a bottom sheet (same tokens/motion as .bottom-sheet in sheets.css).
   Never auto-shown — opened only from the FAB. */

.howto-fab {
  position: fixed;
  z-index: 18;
  left: 18px;
  bottom: calc(18px + var(--safe-bottom));
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--composer-border);
  border-radius: 20px;
  color: var(--purple);
  background: var(--composer);
  box-shadow: var(--card-shadow);
  -webkit-backdrop-filter: blur(28px);
  backdrop-filter: blur(28px);
  cursor: pointer;
}

.howto-fab svg {
  width: 26px;
  height: 26px;
}

.howto-fab circle,
.howto-fab path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.9;
}

.app-shell[data-mode="connected"] .howto-fab,
.app-shell[data-mode="disconnecting"] .howto-fab {
  display: none;
}

.onboarding {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  align-items: end;
  justify-items: center;
  padding: 16px;
  padding-bottom: calc(16px + var(--safe-bottom));
}

.onboarding__backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--shadow-ink) 46%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity var(--motion-backdrop-out) linear;
}

.onboarding[data-open="true"] .onboarding__backdrop {
  opacity: 1;
  transition-duration: var(--motion-backdrop-in);
}

/* Slides up from the bottom edge exactly like .bottom-sheet: same offsets,
   radii, blur, and motion tokens, so the tour reads as one of the app's
   sheets rather than a centered dialog. */
.onboarding__card {
  position: relative;
  width: min(430px, 100%);
  /* Landscape phones are shorter than the card's content; cap the height and
     let the card scroll vertically (like .bottom-sheet) instead of clipping
     the handle and close button past the top of the screen. */
  max-height: calc(100dvh - 32px - var(--safe-top) - var(--safe-bottom));
  display: grid;
  gap: 10px;
  padding: 14px 0 16px;
  border: 1px solid var(--composer-border);
  border-radius: 34px;
  background: var(--composer);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(30px);
  backdrop-filter: blur(30px);
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  overscroll-behavior: contain;
  transform: translateY(calc(100% + 40px));
  transform-origin: 50% 100%;
  transition: transform var(--motion-sheet-out) var(--ease-in);
}

.onboarding__card::-webkit-scrollbar {
  display: none;
}

.onboarding[data-open="true"] .onboarding__card {
  transform: translateY(0);
  transition: transform var(--motion-sheet-in) var(--ease-out);
}

.onboarding__card .sheet-handle {
  margin-bottom: 0;
}

@media (max-width: 759px) {
  .onboarding {
    padding: 0;
  }

  .onboarding__card {
    width: 100%;
    max-height: calc(100dvh - max(12px, var(--safe-top)));
    /* Slides pad 26px horizontally; add the notch insets on top so landscape
       text clears the rounded corners/housing (mirrors .bottom-sheet). */
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
    padding-bottom: calc(18px + var(--safe-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 30px 30px 0 0;
  }
}

.onboarding__close {
  position: absolute;
  z-index: 2;
  top: 10px;
  right: 10px;
  /* 44px hit target, matching .sheet-close-icon and the iOS HIG minimum. */
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 15px;
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  cursor: pointer;
}

.onboarding__close svg {
  width: 18px;
  height: 18px;
}

.onboarding__close path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.onboarding__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.onboarding__track::-webkit-scrollbar {
  display: none;
}

.onboarding__slide {
  scroll-snap-align: center;
  scroll-snap-stop: always;
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 8px;
  padding: 6px 26px 4px;
  text-align: center;
}

.onboarding__slide h2 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.onboarding__slide p {
  margin: 0;
  max-width: 300px;
  color: color-mix(in srgb, var(--ink) 62%, transparent);
  font-size: 13.5px;
  font-weight: 560;
  line-height: 1.5;
}

.onboarding__hint {
  margin-top: 4px;
  color: color-mix(in srgb, var(--ink) 40%, transparent);
  font-size: 11.5px;
  font-weight: 680;
}

/* --- Scenes ------------------------------------------------------------- */

.onboarding__scene {
  position: relative;
  width: 100%;
  /* Tall enough for the welcome orbit: orbiters ride a 68px-radius ring and
     stick out half an avatar (17px) past it, so they need 170px + shadow room.
     All scenes share the height so every slide's card is the same size. */
  height: 176px;
  display: grid;
  place-items: center;
}

.onboarding__mark {
  width: 88px;
  height: 88px;
}

.onboarding__mark--glow {
  filter: drop-shadow(0 10px 26px color-mix(in srgb, var(--blue) 44%, transparent));
}

/* Welcome: a miniature of the real orbit UI — dashed rings, "you" in the
   middle, nearby peers riding the rings (same rotate/counter-rotate trick
   as .peer-node in orbit.css so avatars stay upright). */
.onboarding__orbit {
  position: relative;
  width: 136px;
  height: 136px;
  display: grid;
  place-items: center;
}

.onboarding__orbit-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  border-radius: 999px;
  opacity: .78;
}

.onboarding__orbit-ring circle {
  fill: none;
  stroke: color-mix(in srgb, var(--purple) 56%, var(--ink) 8%);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-dasharray: 10 6 3 5 8 6;
}

.onboarding__orbit-ring--inner {
  inset: 21%;
  width: 58%;
  height: 58%;
}

.onboarding__orbit-ring--inner circle {
  stroke: color-mix(in srgb, var(--mint) 66%, var(--ink) 8%);
  stroke-dasharray: 7 5 12 6;
}

.onboarding__orbit-self {
  position: relative;
  z-index: 2;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  box-shadow: 0 10px 22px color-mix(in srgb, var(--shadow-ink) 24%, transparent);
}

.onboarding__orbiter {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  box-shadow: 0 8px 18px color-mix(in srgb, var(--shadow-ink) 22%, transparent);
  transform: translate(-50%, -50%) rotate(var(--angle)) translateY(calc(var(--orbit-r) * -1)) rotate(calc(var(--angle) * -1));
}

.onboarding__orbiter--a { --angle: -35deg; --orbit-r: 68px; }
.onboarding__orbiter--b { --angle: 130deg; --orbit-r: 68px; }
.onboarding__orbiter--c { --angle: 235deg; --orbit-r: 40px; width: 29px; height: 29px; }

.onboarding__bumper {
  position: absolute;
  top: 50%;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  box-shadow: 0 12px 24px color-mix(in srgb, var(--shadow-ink) 24%, transparent);
  transform: translateY(-50%);
}

.onboarding__bumper--left { left: calc(50% - 82px); }
.onboarding__bumper--right { right: calc(50% - 82px); }

.onboarding__ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  border: 2px solid var(--blue);
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%);
}

.onboarding__ripple--echo {
  border-width: 1.5px;
}

.onboarding__qr {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 26px);
  gap: 7px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--ink) 4%, transparent);
}

.onboarding__qr i {
  height: 26px;
  border-radius: 7px;
  background: var(--ink);
}

.onboarding__qr i:nth-child(2n) {
  background: color-mix(in srgb, var(--ink) 26%, transparent);
}

.onboarding__qr i:nth-child(5) {
  background: var(--blue);
}

/* Your profile sits at the QR's center — each code is unique to its owner. */
.onboarding__qr-avatar {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2.5px solid var(--panel-solid);
  box-shadow: 0 6px 14px color-mix(in srgb, var(--shadow-ink) 26%, transparent);
}

.onboarding__beam {
  position: absolute;
  left: 50%;
  top: 18px;
  width: 132px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--mint), transparent);
  transform: translateX(-50%);
}

/* Send: a file on each side, the tiles-as-progress-bar racing 0→100%
   between them, and a "100%" chip that pops when the run completes. */
.onboarding__file {
  position: absolute;
  top: 50%;
  width: 68px;
  display: grid;
  gap: 7px;
  padding: 13px 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--ink) 4%, transparent);
  transform: translateY(-50%);
}

.onboarding__file i {
  height: 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 26%, transparent);
}

.onboarding__file i:first-child {
  width: 62%;
  background: var(--blue);
}

.onboarding__file--left { left: 6%; }
.onboarding__file--right { right: 6%; }

.onboarding__file--right i:first-child {
  background: var(--mint);
}

.onboarding__tiles {
  position: absolute;
  top: calc(50% - 6px);
  left: 50%;
  display: grid;
  grid-auto-flow: column;
  gap: 5px;
  transform: translateX(-50%);
}

.onboarding__tiles i {
  width: 12px;
  height: 12px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--ink) 14%, transparent);
}

.onboarding__send-pct {
  position: absolute;
  top: calc(50% + 16px);
  left: 50%;
  transform: translateX(-50%) scale(.7);
  color: var(--mint);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: .02em;
  opacity: 0;
}

/* --- Start swipe + dots -------------------------------------------------- */

.onboarding__start-swipe {
  width: min(280px, 100%);
  margin-top: 10px;
}

.onboarding__pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding-top: 2px;
}

.onboarding__dots {
  display: flex;
  justify-content: center;
  gap: 7px;
}

/* Prev/next pagination for pointer devices: mice can't swipe the carousel, so
   desktop gets clickable chevrons flanking the dots. Touch devices keep the
   swipe-only footer (display:none also removes these from the tab order). */
.onboarding__nav {
  display: none;
}

@media (hover: hover) and (pointer: fine) {
  .onboarding__nav {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 0;
    border-radius: 12px;
    color: var(--ink-soft);
    background: color-mix(in srgb, var(--ink) 7%, transparent);
    cursor: pointer;
  }

  .onboarding__nav:disabled {
    opacity: .35;
    cursor: default;
  }

  .onboarding__nav svg {
    width: 18px;
    height: 18px;
  }

  .onboarding__nav path {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
}

.onboarding__dot {
  width: 7px;
  height: 7px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ink) 18%, transparent);
  cursor: pointer;
  transition: background var(--motion-control) ease, transform var(--motion-control) var(--ease-out);
}

.onboarding__dot[data-active="true"] {
  background: var(--blue);
  transform: scale(1.25);
}

/* --- Motion -------------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .onboarding__orbiter {
    animation: onboardingOrbit 20s linear infinite;
  }

  .onboarding__orbiter--c {
    animation-duration: 14s;
    animation-direction: reverse;
  }

  .onboarding__orbit-ring {
    animation: onboardingRingDrift 46s linear infinite;
  }

  .onboarding__orbit-ring--inner {
    animation-direction: reverse;
  }

  /* Bump cycle is 2.8s with contact at ~32% — onboarding.js schedules the
     bump sound off these numbers, so keep them in lockstep. */
  .onboarding__bumper--left {
    animation: onboardingBumpLeft 2.8s ease-in-out infinite;
  }

  .onboarding__bumper--right {
    animation: onboardingBumpRight 2.8s ease-in-out infinite;
  }

  .onboarding__ripple {
    animation: onboardingRipple 2.8s cubic-bezier(.2, .55, .3, 1) infinite;
  }

  .onboarding__ripple--echo {
    animation-name: onboardingRippleEcho;
  }

  .onboarding__beam {
    animation: onboardingBeam 2.4s ease-in-out infinite;
  }

  .onboarding__file--left {
    animation: onboardingFileSend 3s var(--ease) infinite;
  }

  .onboarding__file--right {
    animation: onboardingFileReceive 3s var(--ease) infinite;
  }

  .onboarding__tiles i {
    animation: onboardingTileFill 3s ease-in-out infinite;
  }

  .onboarding__tiles i:nth-child(2) { animation-delay: .05s; }
  .onboarding__tiles i:nth-child(3) { animation-delay: .1s; }
  .onboarding__tiles i:nth-child(4) { animation-delay: .15s; }
  .onboarding__tiles i:nth-child(5) { animation-delay: .2s; }
  .onboarding__tiles i:nth-child(6) { animation-delay: .25s; }
  .onboarding__tiles i:nth-child(7) { animation-delay: .3s; }
  .onboarding__tiles i:nth-child(8) { animation-delay: .35s; }

  .onboarding__send-pct {
    animation: onboardingSendPct 3s var(--ease-out) infinite;
  }

  .onboarding__mark--glow {
    animation: onboardingGlow 2.8s ease-in-out infinite;
  }
}

@keyframes onboardingOrbit {
  from {
    transform: translate(-50%, -50%) rotate(var(--angle)) translateY(calc(var(--orbit-r) * -1)) rotate(calc(var(--angle) * -1));
  }

  to {
    transform: translate(-50%, -50%) rotate(calc(var(--angle) + 360deg)) translateY(calc(var(--orbit-r) * -1)) rotate(calc((var(--angle) + 360deg) * -1));
  }
}

@keyframes onboardingRingDrift {
  to { rotate: 360deg; }
}

/* Approach, kiss at 32%, a soft recoil, then an unhurried glide home. */
@keyframes onboardingBumpLeft {
  0%, 14% { transform: translateY(-50%) translateX(-28px); }
  32% { transform: translateY(-50%) translateX(23px) rotate(5deg); }
  42% { transform: translateY(-50%) translateX(13px) rotate(2deg); }
  72%, 100% { transform: translateY(-50%) translateX(-28px); }
}

@keyframes onboardingBumpRight {
  0%, 14% { transform: translateY(-50%) translateX(28px); }
  32% { transform: translateY(-50%) translateX(-23px) rotate(-5deg); }
  42% { transform: translateY(-50%) translateX(-13px) rotate(-2deg); }
  72%, 100% { transform: translateY(-50%) translateX(28px); }
}

@keyframes onboardingRipple {
  0%, 32% { opacity: 0; transform: translate(-50%, -50%) scale(.3); }
  38% { opacity: .85; }
  82%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(4.8); }
}

@keyframes onboardingRippleEcho {
  0%, 36% { opacity: 0; transform: translate(-50%, -50%) scale(.3); }
  43% { opacity: .5; }
  88%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(4); }
}

@keyframes onboardingBeam {
  0%, 100% { top: 18px; opacity: 0; }
  12%, 88% { opacity: 1; }
  50% { top: 118px; }
}

@keyframes onboardingFileSend {
  0%, 8% { transform: translateY(-50%) translateX(0); }
  20% { transform: translateY(-50%) translateX(9px) scale(.96); }
  46%, 100% { transform: translateY(-50%) translateX(0); }
}

@keyframes onboardingFileReceive {
  0%, 38% { transform: translateY(-50%) scale(1); }
  50% { transform: translateY(-50%) scale(1.08); }
  64%, 100% { transform: translateY(-50%) scale(1); }
}

/* Tiles sprint to full in ~.5s (plus the .35s stagger), hold, then reset —
   the whole 0→100% run reads in under a second. */
@keyframes onboardingTileFill {
  0%, 8% { background: color-mix(in srgb, var(--ink) 14%, transparent); }
  16%, 74% { background: var(--blue); }
  86%, 100% { background: color-mix(in srgb, var(--ink) 14%, transparent); }
}

@keyframes onboardingSendPct {
  0%, 26% { opacity: 0; transform: translateX(-50%) scale(.7); }
  36%, 68% { opacity: 1; transform: translateX(-50%) scale(1); }
  80%, 100% { opacity: 0; transform: translateX(-50%) scale(.9); }
}

@keyframes onboardingGlow {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

/* The in-app Settings motion toggle ([data-motion="paused"]) stills the tour
   like it stills the orbit and island; onboarding.js also skips the bump
   sound while paused. */
.app-shell[data-motion="paused"] .onboarding__orbiter,
.app-shell[data-motion="paused"] .onboarding__orbit-ring,
.app-shell[data-motion="paused"] .onboarding__bumper--left,
.app-shell[data-motion="paused"] .onboarding__bumper--right,
.app-shell[data-motion="paused"] .onboarding__ripple,
.app-shell[data-motion="paused"] .onboarding__beam,
.app-shell[data-motion="paused"] .onboarding__file--left,
.app-shell[data-motion="paused"] .onboarding__file--right,
.app-shell[data-motion="paused"] .onboarding__tiles i,
.app-shell[data-motion="paused"] .onboarding__send-pct,
.app-shell[data-motion="paused"] .onboarding__mark--glow {
  animation: none !important;
}

/* Match the bottom sheets' reduced-motion behavior (responsive.css): the
   card fades instead of sliding. Scene animations are already gated behind
   the no-preference block above. */
@media (prefers-reduced-motion: reduce) {
  .onboarding__card {
    opacity: 0;
    transform: none;
    transition: opacity 80ms linear;
  }

  .onboarding[data-open="true"] .onboarding__card {
    opacity: 1;
    transform: none;
    transition: opacity 80ms linear;
  }
}

/* Small phones AND short (landscape) viewports: shrink the orbit with the
   scene so orbiters never clip — ring radius 56px + half a 28px avatar =
   70px from center → 140px + room. On short screens this also keeps the
   card compact enough that little or no vertical scrolling is needed. */
@media (max-width: 360px), (max-height: 520px) {
  .onboarding__scene { height: 150px; }
  .onboarding__orbit { width: 112px; height: 112px; }
  .onboarding__orbiter { width: 28px; height: 28px; }
  .onboarding__orbiter--a { --orbit-r: 56px; }
  .onboarding__orbiter--b { --orbit-r: 56px; }
  .onboarding__orbiter--c { --orbit-r: 33px; width: 24px; height: 24px; }
  .onboarding__orbit-self { width: 40px; height: 40px; }
  .onboarding__slide h2 { font-size: 18px; }
  .onboarding__file { width: 58px; padding: 11px 10px; }
  .onboarding__file--left { left: 2%; }
  .onboarding__file--right { right: 2%; }
  .onboarding__tiles { gap: 4px; }
  .onboarding__tiles i { width: 10px; height: 10px; }
}