/* Page shell: presentation stage, device frame, app chrome, sheets, toast. */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; color: inherit; cursor: pointer; }
h1, h2, h3, p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.scroll-hidden {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.scroll-hidden::-webkit-scrollbar { display: none; }

/* ---------- Stage (presentation around the device) ---------- */

.stage {
  min-height: 100dvh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--space-8);
  padding: var(--space-6) var(--space-5);
  background:
    radial-gradient(900px 480px at 15% -10%, color-mix(in srgb, var(--primary) 12%, transparent), transparent),
    radial-gradient(700px 500px at 100% 10%, color-mix(in srgb, var(--secondary) 10%, transparent), transparent),
    var(--background);
}

.stage-intro { max-width: 30rem; text-align: center; display: grid; align-content: center; gap: var(--space-3); }
.stage-eyebrow {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-primary-container);
}
.stage-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-wrap: balance;
}
.stage-lead { color: var(--ink-muted); line-height: 1.55; text-wrap: balance; }

@media (min-width: 960px) {
  .stage {
    grid-template-columns: minmax(18rem, 26rem) auto;
    gap: 6rem;
  }
  .stage-intro { text-align: left; }
}

/* ---------- Device frame ---------- */

.device {
  width: 390px;
  height: min(844px, calc(100dvh - 3rem));
  min-height: 600px;
  padding: 12px;
  border-radius: 52px;
  background: var(--surface-high);
  box-shadow: var(--elevation-device), inset 0 0 0 1px var(--outline);
}

.screen {
  /* Space kept free for the camera island (frame) or the real status bar / home indicator (phone). */
  --screen-top: 46px;
  --screen-bottom: 0px;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border-radius: 40px;
  background:
    radial-gradient(420px 220px at 0% 0%, color-mix(in srgb, var(--primary) 9%, transparent), transparent),
    var(--background);
}

.island {
  position: absolute;
  top: 10px;
  left: 50%;
  z-index: 50;
  width: 96px;
  height: 26px;
  transform: translateX(-50%);
  border-radius: var(--shape-full);
  background: #0b0d0a;
}

/* Real phone or installed app: drop the presentation frame and fill the screen. */
@media (max-width: 500px), (display-mode: standalone) {
  body { overscroll-behavior: none; }
  .stage { display: block; min-height: 0; padding: 0; background: var(--background); }
  .stage-intro, .island { display: none; }
  .device {
    width: 100%;
    height: 100dvh;
    min-height: 0;
    padding: 0;
    border-radius: 0;
    background: none;
    box-shadow: none;
  }
  .screen {
    --screen-top: max(var(--space-4), env(safe-area-inset-top));
    --screen-bottom: env(safe-area-inset-bottom);
    border-radius: 0;
  }
  /* iOS zooms into any input below 16px; keep fields at 16px on phones. */
  input, select, textarea { font-size: max(16px, 1em); }
}

/* ---------- App bar ---------- */

.app-bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--screen-top) var(--space-5) var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-display);
  font-size: 1.3125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 22%, transparent);
}

.lang-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--outline);
  border-radius: var(--shape-full);
  background: var(--surface);
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.lang-button svg { width: 14px; height: 14px; color: var(--ink-muted); }

/* ---------- Views ---------- */

.views { position: relative; flex: 1 1 auto; min-height: 0; overflow: hidden; }

.view {
  position: absolute;
  inset: 0;
  display: none;
  overflow-y: auto;
  padding: var(--space-3) var(--space-5) var(--space-6);
}
.view.is-active { display: block; }

.view-header { display: grid; gap: var(--space-1); margin-bottom: var(--space-4); }
.view-header--split { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-3); }
.view-heading { display: grid; gap: var(--space-1); min-width: 0; }
.view-title {
  font-family: var(--font-display);
  font-size: var(--fs-headline);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.view-subtitle { color: var(--ink-muted); font-size: var(--fs-body-sm); }

/* ---------- Overlay (full-screen secondary window, e.g. Discover) ---------- */

.overlay {
  position: absolute;
  inset: 0;
  z-index: 25;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(420px 220px at 0% 0%, color-mix(in srgb, var(--primary) 9%, transparent), transparent),
    var(--background);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--duration-medium) var(--ease-emphasized),
              visibility 0s linear var(--duration-medium);
}
.overlay.is-open { transform: translateX(0); visibility: visible; transition-delay: 0s; }

.overlay-bar { flex: none; display: flex; align-items: center; gap: var(--space-3); padding: var(--screen-top) var(--space-4) var(--space-3); }
.overlay-title { font-family: var(--font-display); font-size: var(--fs-title-lg); font-weight: 800; letter-spacing: -0.01em; }
.overlay-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 0 var(--space-5) calc(var(--space-6) + var(--screen-bottom)); }

.icon-button {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--elevation-1);
}
.icon-button svg { width: 20px; height: 20px; }

/* ---------- Navigation bar ---------- */

.tabbar {
  flex: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: var(--space-2) var(--space-5) max(var(--space-4), var(--screen-bottom));
  background: var(--surface);
  box-shadow: 0 -1px 0 var(--outline), 0 -10px 24px -16px color-mix(in srgb, var(--ink) 18%, transparent);
}

.tab {
  display: grid;
  justify-items: center;
  gap: 4px;
  min-width: 64px;
  padding: 2px 4px;
  border: 0;
  background: none;
  color: var(--ink-muted);
  font-size: var(--fs-label-sm);
  font-weight: 600;
}
.tab-icon {
  display: grid;
  place-items: center;
  padding: 5px 18px;
  border-radius: var(--shape-full);
  transition: background-color var(--duration-short) var(--ease-standard);
}
.tab-icon svg { width: 22px; height: 22px; }
.tab[aria-current="page"] { color: var(--ink); }
.tab[aria-current="page"] .tab-icon { background: var(--primary-container); color: var(--on-primary-container); }

.tab--create .tab-icon {
  width: 52px;
  height: 52px;
  padding: 0;
  margin-top: -22px;
  border-radius: 18px;
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--elevation-3);
}
.tab--create[aria-current="page"] .tab-icon { background: var(--primary); color: var(--on-primary); }

/* ---------- Sheets ---------- */

.sheet-backdrop {
  position: absolute;
  inset: 0;
  z-index: 30;
  background: var(--scrim);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-short) var(--ease-standard);
}
.sheet-backdrop.is-open { opacity: 1; pointer-events: auto; }
.sheet-backdrop--top { z-index: 32; }

.sheet {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 31;
  display: flex;
  flex-direction: column;
  max-height: 88%;
  border-radius: var(--shape-xl) var(--shape-xl) 0 0;
  background: var(--background);
  box-shadow: var(--elevation-3);
  transform: translateY(100%);
  visibility: hidden;
  transition: transform var(--duration-medium) var(--ease-emphasized),
              visibility 0s linear var(--duration-medium);
}
.sheet.is-open {
  transform: translateY(0);
  visibility: visible;
  transition-delay: 0s;
}
.sheet--top { z-index: 33; }

.sheet-grip {
  flex: none;
  width: 36px;
  height: 4px;
  margin: 10px auto 2px;
  border-radius: var(--shape-full);
  background: var(--outline-strong);
  opacity: 0.5;
}
.sheet-body { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: var(--space-3) var(--space-6) calc(var(--space-6) + var(--screen-bottom)); }
.sheet-footer {
  flex: none;
  padding: var(--space-3) var(--space-6) calc(var(--space-5) + var(--screen-bottom));
  border-top: 1px solid var(--outline);
}
.sheet-close,
.sheet-action {
  position: absolute;
  top: 14px;
  right: 16px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: var(--surface-high);
  color: var(--ink-muted);
}
.sheet-action { right: 56px; }
.sheet-close svg { width: 15px; height: 15px; }
.sheet-action svg { width: 17px; height: 17px; }

/* ---------- Onboarding (first run, covers the whole screen) ---------- */

.onboarding {
  position: absolute;
  inset: 0;
  z-index: 45;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(420px 260px at 100% 0%, color-mix(in srgb, var(--secondary) 10%, transparent), transparent),
    radial-gradient(420px 260px at 0% 100%, color-mix(in srgb, var(--primary) 12%, transparent), transparent),
    var(--background);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-medium) var(--ease-standard),
              visibility 0s linear var(--duration-medium);
}
/* Opens instantly (first launch must not flash the feed), fades out when finished. */
.onboarding.is-open { opacity: 1; visibility: visible; transition: none; }

.onboarding-bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
  padding: var(--screen-top) var(--space-5) var(--space-2);
}
.onboarding-bar .icon-button { margin-left: calc(var(--space-1) * -1); }

.onboarding-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  display: grid;
  align-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
}
.onboarding-body--top { align-content: start; padding-top: var(--space-2); }

.onboarding-footer {
  flex: none;
  display: grid;
  gap: var(--space-5);
  padding: var(--space-3) var(--space-6) calc(var(--space-6) + var(--screen-bottom));
}
.onboarding-actions { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }

/* ---------- System permission dialog (OS stand-in, deliberately neutral) ---------- */

.system-backdrop {
  position: absolute;
  inset: 0;
  z-index: 60;
  background: var(--scrim);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-short) var(--ease-standard);
}
.system-backdrop.is-open { opacity: 1; pointer-events: auto; }

.system-dialog {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 61;
  width: 280px;
  overflow: hidden;
  border-radius: var(--shape-lg);
  background: var(--surface);
  box-shadow: var(--elevation-3);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -50%) scale(1.08);
  transition: opacity var(--duration-short) var(--ease-standard),
              transform var(--duration-short) var(--ease-standard),
              visibility 0s linear var(--duration-short);
}
.system-dialog.is-open {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
  transition-delay: 0s;
}

/* ---------- Toast ---------- */

.toast {
  position: absolute;
  inset: auto var(--space-5) calc(96px + var(--screen-bottom));
  z-index: 40;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--shape-lg);
  background: var(--ink);
  color: var(--background);
  font-size: var(--fs-body-sm);
  font-weight: 600;
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity var(--duration-short) var(--ease-standard),
              transform var(--duration-short) var(--ease-standard);
}
.toast.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .sheet, .sheet-backdrop, .overlay, .toast, .tab-icon,
  .onboarding, .onboarding-dot, .system-backdrop, .system-dialog { transition: none; }
}