/* wa-ios.css - iOS 17/18 platform layer for the chat skin (wa-ui.css). Every rule is scoped to html[data-platform="ios"]
   (and html[data-skin="wa"] where it touches chat-skin parts), so it is a complete no-op on Android, desktop and the Classic skin.
   New CSS features sit inside @supports; motion honours prefers-reduced-motion. Behaviour lives in wa-ios.js. */

html[data-platform="ios"][data-skin="wa"] {
  --ios-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", system-ui, "Helvetica Neue", Arial, sans-serif;
  --ios-blue: #007aff; --ios-sep: rgba(60, 60, 67, .29);
  --ios-material: rgba(255, 255, 255, .86);
  --ios-spring: cubic-bezier(.22, 1, .36, 1);
  --kb: 0px;
  -webkit-text-size-adjust: 100%; text-size-adjust: 100%;
}
@media (prefers-color-scheme: dark) {
  html[data-platform="ios"][data-skin="wa"]:not([data-theme]) { --ios-material: rgba(31, 44, 52, .84); --ios-sep: rgba(84, 84, 88, .65); --ios-blue: #0a84ff; }
}
html[data-platform="ios"][data-skin="wa"][data-theme="dark"], html[data-platform="ios"][data-skin="wa"][data-theme="midnight"], html[data-platform="ios"][data-skin="wa"][data-theme="hc-dark"] {
  --ios-material: rgba(31, 44, 52, .84); --ios-sep: rgba(84, 84, 88, .65); --ios-blue: #0a84ff;
}
html[data-platform="ios"][data-skin="wa"][data-theme="midnight"] { --ios-material: rgba(10, 15, 19, .84); }
@supports (animation-timeline: scroll()) and (transition-timing-function: linear(0, 1)) {
  html[data-platform="ios"][data-skin="wa"] { --ios-spring: linear(0, .009, .035 2.1%, .141 4.4%, .723 12.9%, .938 16.7%, 1.017 19.3%, 1.077 22%, 1.1 25%, 1.09 28%, 1.045 33%, 1.007 40%, .995 48%, 1 62%, 1); }
}

/* ---- (3) type: system font, 17px body / 15px secondary in rem so Dynamic-Type-style root scaling still works ---- */
html[data-platform="ios"][data-skin="wa"] body, html[data-platform="ios"][data-skin="wa"] button, html[data-platform="ios"][data-skin="wa"] input,
html[data-platform="ios"][data-skin="wa"] select, html[data-platform="ios"][data-skin="wa"] textarea { font-family: var(--ios-font); }
html[data-platform="ios"][data-skin="wa"] body { -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent; }
html[data-platform="ios"][data-skin="wa"] .wa-rt { font-size: 1.0625rem; font-weight: 600; letter-spacing: -.012em; }
html[data-platform="ios"][data-skin="wa"] .wa-rsub { font-size: .9375rem; }
html[data-platform="ios"][data-skin="wa"] .wa-rtime { font-size: .8125rem; }
html[data-platform="ios"][data-skin="wa"] .wa-bub { font-size: 1.0625rem; line-height: 1.32; }
html[data-platform="ios"][data-skin="wa"] .wa-cap { font-size: 1.0625rem; }
html[data-platform="ios"][data-skin="wa"] .wa-th-t b { font-size: 1.0625rem; font-weight: 600; }
html[data-platform="ios"][data-skin="wa"] .wa-th-t small { font-size: .8125rem; }
html[data-platform="ios"][data-skin="wa"] .wa-mi { font-size: 1.0625rem; min-height: 52px; }
/* inset 0.5px hairlines (a device pixel on 2x/3x screens); the row separator already starts after the avatar = inset */
html[data-platform="ios"][data-skin="wa"] .wa-rmain { border-bottom: 1px solid var(--ios-sep); }
@media (min-resolution: 2dppx) {
  html[data-platform="ios"][data-skin="wa"] .wa-rmain { border-bottom-width: .5px; }
  html[data-platform="ios"][data-skin="wa"] .wa-chip { border-width: .5px; }
}
html[data-platform="ios"][data-skin="wa"] .wa-row:last-child .wa-rmain { border-bottom-color: transparent; }
/* 44pt minimum targets */
html[data-platform="ios"][data-skin="wa"] .wa-ib { width: 44px; min-width: 44px; height: 44px; min-height: 44px; }
html[data-platform="ios"][data-skin="wa"] .wa-row { min-height: 44px; }
html[data-platform="ios"][data-skin="wa"] .wa-qb, html[data-platform="ios"][data-skin="wa"] .wa-plus { min-height: 44px; }
html[data-platform="ios"][data-skin="wa"] .wa-plus { width: 44px; height: 44px; }
html[data-platform="ios"][data-skin="wa"] .wa-chip { position: relative; min-height: 34px; font-size: .9375rem; }
html[data-platform="ios"][data-skin="wa"] .wa-chip::after { content: ""; position: absolute; inset: -5px -2px; } /* 44pt hit area, 34pt look */
html[data-platform="ios"][data-skin="wa"] .wa-pill { min-height: 36px; border-radius: 10px; }
html[data-platform="ios"][data-skin="wa"] .wa-pill input { min-height: 36px; font-size: 1.0625rem; }
html[data-platform="ios"][data-skin="wa"] .wa-searchbar { padding-top: 4px; }

/* ---- (10) no callout / selection on rows and bars, overscroll only where it breaks sticky bars ---- */
html[data-platform="ios"][data-skin="wa"] .wa-row, html[data-platform="ios"][data-skin="wa"] .wa-tab, html[data-platform="ios"][data-skin="wa"] .wa-chip,
html[data-platform="ios"][data-skin="wa"] .wa-th-head, html[data-platform="ios"][data-skin="wa"] .wa-qb, html[data-platform="ios"][data-skin="wa"] .wa-mi {
  -webkit-touch-callout: none; -webkit-user-select: none; user-select: none; -webkit-tap-highlight-color: transparent;
}
html[data-platform="ios"][data-skin="wa"].wa-thread-page, html[data-platform="ios"][data-skin="wa"].wa-info-page,
html[data-platform="ios"][data-skin="wa"].wa-thread-page body, html[data-platform="ios"][data-skin="wa"].wa-info-page body { overscroll-behavior-y: none; }
html[data-platform="ios"][data-skin="wa"].wa-sheet-open body { overscroll-behavior: none; }

/* ---- (4) safe areas ---- */
@media (max-width: 640px) {
  html[data-platform="ios"][data-skin="wa"] body { padding-left: env(safe-area-inset-left, 0px); padding-right: env(safe-area-inset-right, 0px); }
  html[data-platform="ios"][data-skin="wa"] .topbar { padding-top: env(safe-area-inset-top, 0px); }
  html[data-platform="ios"][data-skin="wa"].has-tabbar { --w6-tabbar-h: 49px; --dms-bottom-offset: calc(49px + env(safe-area-inset-bottom, 0px)); }
  html[data-platform="ios"][data-skin="wa"].wa-thread-page.has-tabbar, html[data-platform="ios"][data-skin="wa"].wa-info-page.has-tabbar { --dms-bottom-offset: 0px; }
  html[data-platform="ios"][data-skin="wa"] .wa-th-head { min-height: 52px; }
  html[data-platform="ios"][data-skin="wa"] .wa-pin { top: calc(52px + env(safe-area-inset-top, 0px)); }
  /* compose bar: rides above the keyboard (--kb is set from visualViewport), drops the home-indicator padding while the keyboard is up */
  html[data-platform="ios"][data-skin="wa"] .wa-compose { bottom: var(--kb, 0px); }
  html[data-platform="ios"][data-skin="wa"].ios-kb .wa-compose { padding-bottom: 8px; }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet { bottom: var(--kb, 0px); }
  html[data-platform="ios"][data-skin="wa"] .wa-cm { font-size: 1rem; } /* >= 16px: Safari does not zoom the page on focus */
}
@media (display-mode: standalone) and (max-width: 640px) {
  /* installed web app: the content starts below the status bar / Dynamic Island */
  html[data-platform="ios"][data-skin="wa"] .topbar { padding-top: max(env(safe-area-inset-top, 0px), 0px); }
  html[data-platform="ios"][data-skin="wa"] .wa-tabbar { padding-bottom: max(env(safe-area-inset-bottom, 0px), 0px); }
}

/* ---- (2) translucent "material" bars ---- */
@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  @media (max-width: 640px) {
    html[data-platform="ios"][data-skin="wa"] .topbar, html[data-platform="ios"][data-skin="wa"] .wa-tabbar,
    html[data-platform="ios"][data-skin="wa"] .wa-th-head, html[data-platform="ios"][data-skin="wa"] .wa-pin {
      background: var(--ios-material); -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
    }
    html[data-platform="ios"][data-skin="wa"] .wa-th-head.solid { background: var(--ios-material); }
    /* the pin bar sits over message text: keep it nearly opaque so nothing ghosts through (verifier finding) */
    html[data-platform="ios"][data-skin="wa"] .wa-pin { background: color-mix(in srgb, var(--wa-head) 95%, transparent); }
  }
}
html[data-platform="ios"][data-skin="wa"] .topbar, html[data-platform="ios"][data-skin="wa"] .wa-th-head { box-shadow: none; border-bottom: 1px solid transparent; transition: border-color .2s; }
html[data-platform="ios"][data-skin="wa"] .wa-th-head { border-bottom-color: var(--ios-sep); }
html[data-platform="ios"][data-skin="wa"] .wa-tabbar { border-top: 1px solid var(--ios-sep); }
@media (min-resolution: 2dppx) {
  html[data-platform="ios"][data-skin="wa"] .wa-tabbar { border-top-width: .5px; }
  html[data-platform="ios"][data-skin="wa"] .topbar, html[data-platform="ios"][data-skin="wa"] .wa-th-head { border-bottom-width: .5px; }
}
/* the list bar shows its hairline only after the large title has collapsed */
html[data-platform="ios"][data-skin="wa"].ios-collapsed .topbar { border-bottom-color: var(--ios-sep); }
html[data-platform="ios"][data-skin="wa"].ios-titled .topbar.w6-hidden { transform: none; } /* the collapsed title lives in the bar: it must stay */

/* ---- tab bar: 49pt, small labels, tint on the active tab (no pill) ---- */
@media (max-width: 640px) {
  html[data-platform="ios"][data-skin="wa"] .wa-tabbar .wa-tab { height: 49px; min-height: 49px; padding: 5px 2px 2px; gap: 1px; font-size: .625rem; font-weight: 500; letter-spacing: .01em; }
  html[data-platform="ios"][data-skin="wa"] .wa-tab-i { width: 44px; height: 28px; border-radius: 0; }
  html[data-platform="ios"][data-skin="wa"] .wa-tab.active .wa-tab-i { background: none; }
  html[data-platform="ios"][data-skin="wa"] .wa-tab.active { color: var(--accent); font-weight: 600; }
  html[data-platform="ios"][data-skin="wa"] .wa-tab { transition: transform .12s; }
  html[data-platform="ios"][data-skin="wa"] .wa-tab:active { transform: scale(.92); }
  html[data-platform="ios"][data-skin="wa"] .wa-tab-i .badge { top: -3px; min-width: 18px; line-height: 18px; font-size: .6875rem; }
}

/* ---- (1) large collapsing title ---- */
html[data-platform="ios"][data-skin="wa"] .ios-lt { display: none; }
html[data-platform="ios"][data-skin="wa"] .ios-bt { display: none; }
@media (max-width: 640px) {
  html[data-platform="ios"][data-skin="wa"] .ios-lt { display: block; margin: 0; padding: 2px 16px 0; background: transparent; }
  html[data-platform="ios"][data-skin="wa"] :is(.wa-list, .wa-page) > .ios-lt { background: var(--surface); }
  html[data-platform="ios"][data-skin="wa"] .ios-lt.in-main { padding: 2px 0 6px; }
  html[data-platform="ios"][data-skin="wa"] .ios-lt h1 { margin: 0; padding: 0; font-size: 2.125rem; line-height: 41px; font-weight: 700; letter-spacing: .012em; color: var(--text); }
  /* the round + moves into the title row (WhatsApp on iPhone has its compose button in the bar, not floating over the list) */
  html[data-platform="ios"][data-skin="wa"] .wa-fab { display: none; }
  html[data-platform="ios"][data-skin="wa"] .ios-lt { position: relative; display: flex; align-items: center; justify-content: space-between; }
  html[data-platform="ios"][data-skin="wa"] .ios-lt-add { position: relative; flex: none; width: 34px; height: 34px; margin-right: -2px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; background: var(--accent-soft); color: var(--accent); text-decoration: none; }
  html[data-platform="ios"][data-skin="wa"] .ios-lt-add:active { transform: scale(.92); }
  html[data-platform="ios"][data-skin="wa"] .ios-lt-add::after { content: ""; position: absolute; inset: -6px; }
  html[data-platform="ios"][data-skin="wa"] .wa-pagebar h1 { display: none; } /* the large title replaces the old Tasks heading */
  html[data-platform="ios"][data-skin="wa"] .wa-pagebar { padding-top: 4px; }
  /* small title in the bar, centred; visible once the large one has scrolled away */
  html[data-platform="ios"][data-skin="wa"].ios-titled .topbar-inner { position: relative; }
  html[data-platform="ios"][data-skin="wa"].ios-titled .ios-bt { display: block; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); max-width: 36%; overflow: hidden;
    text-overflow: ellipsis; white-space: nowrap; font-size: 1.0625rem; font-weight: 600; color: var(--text); opacity: 0; pointer-events: none; }
  html[data-platform="ios"][data-skin="wa"].ios-titled :is(.brand, .wa-co) { transition: opacity .2s; }
}
/* scroll-driven version: the bar title fades in while the big title scrolls under the bar */
@supports (animation-timeline: scroll()) {
  @media (max-width: 640px) and (prefers-reduced-motion: no-preference) {
    @keyframes ios-bt-in { from { opacity: 0; } to { opacity: 1; } }
    @keyframes ios-brand-out { from { opacity: 1; } to { opacity: 0; } }
    @keyframes ios-lt-out { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(-6px) scale(.97); } }
    @keyframes ios-hair-in { from { border-bottom-color: transparent; } to { border-bottom-color: var(--ios-sep); } }
    html[data-platform="ios"][data-skin="wa"]:not([data-ios-fallback]).ios-titled .ios-bt { animation: ios-bt-in linear both; animation-timeline: scroll(root block); animation-range: 26px 52px; }
    html[data-platform="ios"][data-skin="wa"]:not([data-ios-fallback]).ios-titled :is(.brand, .wa-co) { animation: ios-brand-out linear both; animation-timeline: scroll(root block); animation-range: 26px 52px; }
    html[data-platform="ios"][data-skin="wa"]:not([data-ios-fallback]).ios-titled .ios-lt h1 { transform-origin: 0 100%; animation: ios-lt-out linear both; animation-timeline: scroll(root block); animation-range: 0 44px; }
    html[data-platform="ios"][data-skin="wa"]:not([data-ios-fallback]).ios-titled .topbar { animation: ios-hair-in linear both; animation-timeline: scroll(root block); animation-range: 40px 56px; }
  }
}
/* fallback (no scroll-driven animations): JS toggles html.ios-collapsed from an IntersectionObserver */
@media (max-width: 640px) {
  html[data-platform="ios"][data-skin="wa"][data-ios-fallback].ios-titled .ios-bt { transition: opacity .18s; }
  html[data-platform="ios"][data-skin="wa"][data-ios-fallback].ios-titled.ios-collapsed .ios-bt { opacity: 1; }
  html[data-platform="ios"][data-skin="wa"][data-ios-fallback].ios-titled.ios-collapsed :is(.brand, .wa-co) { opacity: 0; pointer-events: none; }
}

/* ---- (6) swipe actions on list rows ---- */
html[data-platform="ios"][data-skin="wa"] .wa-rows { overflow-x: clip; }
html[data-platform="ios"][data-skin="wa"] .wa-row { position: relative; background: var(--surface); touch-action: pan-y; }
html[data-platform="ios"][data-skin="wa"] .wa-row.ios-pressing { background: var(--surface-2); }
html[data-platform="ios"][data-skin="wa"] .ios-sw { position: absolute; left: 100%; top: 0; bottom: 0; width: 152px; display: flex; }
html[data-platform="ios"][data-skin="wa"] .ios-sw button { flex: 1; min-height: 0; height: 100%; border: 0; border-radius: 0; padding: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: #fff; font: 600 .8125rem/1 var(--ios-font); background: var(--ios-blue); }
html[data-platform="ios"][data-skin="wa"] .ios-sw button.open { background: #00a884; }
html[data-platform="ios"][data-skin="wa"] .ios-sw svg { width: 22px; height: 22px; display: block; }
html[data-platform="ios"][data-skin="wa"] .wa-row.ios-anim { transition: translate .42s var(--ios-spring); } /* `translate`, not `transform`: wa-motion.js animates .wa-row's transform and would override it */

/* ---- (7) long-press context sheet (reuses .wa-back / .wa-sheet / .wa-mi) ---- */
html[data-platform="ios"][data-skin="wa"] .ios-ctx { padding-bottom: calc(14px + env(safe-area-inset-bottom, 0px)); }
html[data-platform="ios"][data-skin="wa"] .ios-ctx-prev { display: flex; align-items: center; gap: 12px; margin: 22px 12px 6px; padding: 10px 12px; border-radius: 14px; background: var(--surface-2); }
html[data-platform="ios"][data-skin="wa"] .ios-ctx-prev > span:last-child { min-width: 0; display: flex; flex-direction: column; }
html[data-platform="ios"][data-skin="wa"] .ios-ctx-prev b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 1.0625rem; }
html[data-platform="ios"][data-skin="wa"] .ios-ctx-prev small { color: var(--muted); font-size: .8125rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
html[data-platform="ios"][data-skin="wa"] .ios-ctx .wa-sheet-b { padding: 4px 12px 4px; }
html[data-platform="ios"][data-skin="wa"] .ios-ctx .wa-mi { border-radius: 0; border-bottom: .5px solid var(--ios-sep); justify-content: space-between; flex-direction: row-reverse; padding: 0 6px; }
html[data-platform="ios"][data-skin="wa"] .ios-ctx .wa-mi:last-child { border-bottom: 0; }

/* ---- (8) native-feeling bottom sheets ---- */
@media (max-width: 640px) {
  html[data-platform="ios"][data-skin="wa"] .wa-sheet { border-radius: 16px 16px 0 0; box-shadow: 0 -1px 0 var(--ios-sep), 0 -10px 40px rgba(0, 0, 0, .22); touch-action: pan-y; }
  html[data-platform="ios"][data-skin="wa"] .wa-grab { top: 6px; width: 36px; height: 5px; margin-left: -18px; border-radius: 3px; background: var(--ios-sep); }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet-h { padding-top: 22px; }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet-h .wa-x { width: 30px; min-width: 30px; height: 30px; min-height: 30px; margin-right: 8px; background: var(--surface-2); color: var(--muted); }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet.ios-dragging { transition: none; }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet.ios-snap { transition: transform .5s var(--ios-spring); }
  html[data-platform="ios"][data-skin="wa"] .wa-back { background: rgba(0, 0, 0, .4); }
  html[data-platform="ios"][data-skin="wa"] .wa-back.ios-snap { transition: opacity .3s; }
}
@media (max-width: 640px) and (prefers-reduced-motion: no-preference) {
  @keyframes ios-sheet-up { from { transform: translateY(100%); } to { transform: none; } }
  html[data-platform="ios"][data-skin="wa"] .wa-sheet { animation: ios-sheet-up .55s var(--ios-spring) backwards; }
}
@media (prefers-reduced-motion: reduce) {
  html[data-platform="ios"][data-skin="wa"] .wa-sheet, html[data-platform="ios"][data-skin="wa"] .wa-row.ios-anim,
  html[data-platform="ios"][data-skin="wa"] .wa-sheet.ios-snap { transition: none; animation: none; }
  html[data-platform="ios"][data-skin="wa"] .wa-thread, html[data-platform="ios"][data-skin="wa"] .wa-info { animation: none; }
}

/* ---- (5) edge swipe back: the page follows the finger ---- */
html[data-platform="ios"][data-skin="wa"] .ios-sb { will-change: transform; box-shadow: -10px 0 28px rgba(0, 0, 0, .18); }
html[data-platform="ios"][data-skin="wa"] .ios-sb.ios-snap { transition: transform .45s var(--ios-spring); }
html[data-platform="ios"][data-skin="wa"] .ios-sb-shade { position: fixed; inset: 0; z-index: 1; background: #000; opacity: 0; pointer-events: none; }
html[data-platform="ios"][data-skin="wa"] .ios-sb-shade.ios-snap { transition: opacity .3s; }