/* ============================================================================
   layout.css — app shell, splash, header, screens, bottom-nav + FAB, desktop.
   ============================================================================ */

/* ----------------------------- App root ---------------------------------- */
.app-root {
  position: relative;
  z-index: var(--z-content);
  min-height: 100dvh;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity 0.4s var(--ease-glass);
}
.app-root.ready { opacity: 1; }

body.no-scroll { overflow: hidden; }

/* ------------------------------ Splash ------------------------------------ */
.splash {
  position: fixed; inset: 0; z-index: var(--z-splash);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--s-5);
  background: radial-gradient(120% 120% at 50% 30%, var(--bg-1), var(--bg-0));
  transition: opacity 0.5s var(--ease-glass), visibility 0.5s;
}
.splash.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.splash-logo { position: relative; width: 96px; height: 96px; display: grid; place-items: center; }
.splash-mark {
  width: 72px; height: 72px; border-radius: 22px;
  background: var(--grad-brand);
  display: grid; place-items: center;
  font-size: 38px; font-weight: var(--fw-black); color: #fff;
  box-shadow: 0 18px 50px -10px var(--brand-glow), inset 0 1px 0 rgba(255,255,255,.4);
  animation: floaty 3s var(--ease-in-out) infinite;
}
.splash-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 3px solid transparent; border-top-color: var(--brand-300);
  animation: spin 1s linear infinite;
}
.splash-word { font-size: 1.4rem; letter-spacing: -0.02em; opacity: 0.9; }

/* ------------------------------ Header ------------------------------------ */
.app-header {
  position: sticky; top: 0; z-index: var(--z-header);
  padding: calc(var(--safe-top) + 10px) var(--s-5) 10px;
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
  background: linear-gradient(to bottom, var(--bg-0) 30%, transparent);
}
.app-header::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  -webkit-mask: linear-gradient(to bottom, #000 60%, transparent);
  mask: linear-gradient(to bottom, #000 60%, transparent);
}
.header-greet { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.header-greet .hello { font-size: 0.78rem; color: var(--text-3); }
.header-greet .name { font-size: 1.15rem; font-weight: var(--fw-bold); }
.header-actions { display: flex; align-items: center; gap: var(--s-2); }

.icon-btn {
  position: relative;
  width: 42px; height: 42px; border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: var(--text-1);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur-soft)); backdrop-filter: blur(var(--blur-soft));
  transition: transform var(--t-fast) var(--ease-glass), background var(--t-base), border-color var(--t-base);
}
.icon-btn:active { transform: scale(0.92); }
@media (hover: hover) { .icon-btn:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-strong); } }

.bell-badge {
  position: absolute; top: 4px; right: 4px;
  min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: 999px; background: var(--danger); color: #fff;
  font-size: 0.58rem; font-weight: var(--fw-bold); line-height: 1;
  display: grid; place-items: center;
  border: 2px solid var(--bg-1);
  transform-origin: center;
}
[data-theme="light"] .bell-badge { border-color: #fff; }
.bell-badge.pop { animation: pulseDot 0.6s var(--ease-spring); }
.bell-ring.ring { animation: bellShake 0.8s var(--ease-in-out); }

.avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--grad-brand); color: #fff;
  display: grid; place-items: center; font-weight: var(--fw-bold);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.4), 0 6px 18px -6px var(--brand-glow);
  border: 1px solid rgba(255,255,255,.25);
}

/* route transition progress bar */
.route-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: var(--z-toast);
  transform: scaleX(0); transform-origin: left;
  background: linear-gradient(to right, var(--brand-400), var(--brand-300), var(--brand-500));
  box-shadow: 0 0 12px var(--brand-glow); pointer-events: none;
}
/* native view-transition crossfade timing for route swaps */
::view-transition-old(root), ::view-transition-new(root) { animation-duration: 0.32s; }

/* ------------------------------ Screens ----------------------------------- */
#screen { flex: 1; position: relative; }
.screen { position: relative; }
.screen-pad {
  padding: var(--s-4) var(--s-5);
  padding-bottom: calc(var(--nav-h) + var(--safe-bottom) + 28px);
}
.screen-title { margin: var(--s-2) 0 var(--s-4); }
.section-label {
  font-size: 0.78rem; font-weight: var(--fw-semibold);
  color: var(--text-3); text-transform: uppercase; letter-spacing: 0.07em;
  margin-bottom: var(--s-3);
}

/* page-level back header for detail/secondary screens */
.sub-header { display: flex; align-items: center; gap: var(--s-3); margin-bottom: var(--s-4); }
.sub-header h1 { font-size: 1.4rem; }

/* ------------------------- Bottom-nav + FAB ------------------------------- */
.bottom-nav {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(var(--safe-bottom) + 14px);
  width: min(calc(100% - 28px), calc(var(--max-w) - 28px));
  height: 64px; z-index: var(--z-nav);
  display: grid; grid-template-columns: repeat(5, 1fr); align-items: center;
  border-radius: var(--r-xl);
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: blur(var(--blur-strong)) saturate(160%);
  backdrop-filter: blur(var(--blur-strong)) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
}
.nav-item {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  color: var(--text-3); font-size: 0.62rem; font-weight: var(--fw-medium);
  transition: color var(--t-base) var(--ease-glass), transform var(--t-fast);
  padding: 6px 0;
}
.nav-item svg { transition: transform var(--t-base) var(--ease-spring); }
.nav-item.active { color: var(--brand-300); }
.nav-item.active svg { transform: translateY(-2px) scale(1.08); filter: drop-shadow(0 4px 10px var(--brand-glow)); }
.nav-item:active { transform: scale(0.9); }

/* FAB occupies the middle nav slot */
.fab-slot { position: relative; display: grid; place-items: center; }
.fab {
  position: relative;
  width: 60px; height: 60px; margin-top: -28px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff; display: grid; place-items: center;
  box-shadow: 0 14px 32px -8px var(--brand-glow), inset 0 1px 0 rgba(255,255,255,.5);
  border: 1px solid rgba(255,255,255,.3);
  transition: transform var(--t-base) var(--ease-spring);
}
.fab::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; background: var(--brand-glow); filter: blur(14px); opacity: 0.6; z-index: -1; }
.fab:active { transform: scale(0.9) rotate(8deg); }
.fab svg { transition: transform var(--t-base) var(--ease-spring); }
.fab.open svg { transform: rotate(135deg); }

/* radial action menu that expands from the FAB */
.fab-menu {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(var(--safe-bottom) + 92px); z-index: var(--z-nav);
  display: flex; flex-direction: column; gap: var(--s-3); align-items: center;
  pointer-events: none;
}
.fab-action {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 12px 18px 12px 14px; border-radius: var(--r-full);
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur-md)); backdrop-filter: blur(var(--blur-md));
  box-shadow: var(--glass-shadow);
  color: var(--text-1); font-weight: var(--fw-semibold);
  opacity: 0; transform: translateY(16px) scale(0.9);
  pointer-events: auto;
}
.fab-action .fab-action-ic { width: 34px; height: 34px; border-radius: 50%; background: var(--grad-brand); color: #fff; display: grid; place-items: center; }

/* ----------------------- Desktop adaptation ------------------------------- */
@media (min-width: 920px) {
  :root { --side-w: 256px; }
  .app-root {
    display: grid;
    grid-template-columns: var(--side-w) minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    grid-template-areas: "side header" "side main";
    gap: 0 var(--s-7);
    padding: 0 var(--s-7);
    max-width: 1560px;        /* fill wide screens instead of a narrow column */
    transition: grid-template-columns 0.34s var(--ease-glass);
  }
  .app-root.nav-collapsed { --side-w: 78px; }

  .app-header { grid-area: header; background: none; padding-top: var(--s-6); }
  .app-header::after { display: none; }
  #screen { grid-area: main; }
  .screen-pad { padding: 0 0 var(--s-8); max-width: none; }   /* content fills the column */

  /* sidebar replaces bottom-nav */
  .bottom-nav { display: none; }
  .desktop-side {
    grid-area: side; position: sticky; top: var(--s-6); align-self: start;
    height: calc(100dvh - var(--s-8));
    display: flex; flex-direction: column; gap: var(--s-1);
    padding: var(--s-5) var(--s-3);
    border-radius: var(--r-lg);
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    -webkit-backdrop-filter: blur(var(--blur-md)); backdrop-filter: blur(var(--blur-md));
    box-shadow: var(--glass-shadow);
    margin: var(--s-6) 0; overflow: hidden;
  }
  .side-top { display: flex; align-items: center; gap: var(--s-2); padding: 0 var(--s-1) var(--s-4); }
  .side-brand { display: flex; align-items: center; gap: var(--s-3); min-width: 0; flex: 1; }
  .side-brand .mark { width: 38px; height: 38px; border-radius: 12px; background: var(--grad-brand);
    color: #fff; display: grid; place-items: center; font-weight: 800; flex: none; }
  .side-brand .brand-text { white-space: nowrap; }
  .side-collapse-btn { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
    color: var(--text-3); background: var(--fill-1); border: 1px solid var(--glass-border); flex: none;
    transition: transform 0.34s var(--ease-glass), background var(--t-base), color var(--t-base); }
  .side-collapse-btn:hover { background: var(--glass-bg-hover); color: var(--text-1); }
  .side-item {
    display: flex; align-items: center; gap: var(--s-3);
    padding: 12px 13px; border-radius: var(--r-sm); color: var(--text-2);
    font-weight: var(--fw-medium); transition: background var(--t-base), color var(--t-base);
    white-space: nowrap; overflow: hidden;
  }
  .side-item svg { flex: none; }
  .side-item.active { background: var(--glass-bg-strong); color: var(--text-1); box-shadow: inset 0 0 0 1px var(--glass-border); }
  .side-item.active svg { color: var(--brand-300); }
  .side-item:hover { background: var(--glass-bg); color: var(--text-1); }
  .side-fab { margin-top: auto; }

  /* Collapsed sidebar: icons only */
  .nav-collapsed .side-brand { display: none; }
  .nav-collapsed .side-top { justify-content: center; padding-bottom: var(--s-4); }
  .nav-collapsed .side-collapse-btn { transform: rotate(180deg); }
  .nav-collapsed .side-item { justify-content: center; padding: 12px 0; gap: 0; }
  .nav-collapsed .side-item .side-label,
  .nav-collapsed .side-fab .fab-label { display: none; }
  .nav-collapsed .side-fab { padding-left: 0; padding-right: 0; }

  .grid-2 { gap: var(--s-5); }
  .desktop-only { display: revert; }
}
/* Hide desktop-only chrome below the breakpoint. Scoped to a max-width query so
   it never competes (by source order) with the min-width rules above. */
@media (max-width: 919.98px) {
  .desktop-side { display: none; }
  .desktop-only { display: none; }
}

/* ------------------------- Pull-to-refresh -------------------------------- */
.ptr-indicator {
  position: fixed; top: calc(var(--safe-top) - 50px); left: 50%;
  transform: translateX(-50%); z-index: var(--z-header);
  opacity: 0; pointer-events: none;
}
.ptr-spinner {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; color: var(--brand-300);
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur-md)); backdrop-filter: blur(var(--blur-md));
  box-shadow: var(--glass-shadow);
}
.ptr-spinner.ready { color: var(--success); }
.ptr-spinner.spinning svg { animation: spin 0.8s linear infinite; }

/* ------------------------------ Login ------------------------------------- */
.login-screen {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  padding: calc(var(--safe-top) + 24px) var(--s-5) calc(var(--safe-bottom) + 24px);
}
.login-card { width: min(420px, 100%); padding: var(--s-7) var(--s-6); border-radius: var(--r-xl); }
.login-logo { display: grid; place-items: center; }
.login-logo .splash-mark { width: 64px; height: 64px; border-radius: 20px; font-size: 32px; }
.login-card h1 { font-size: 1.6rem; }
body.no-chrome .app-root { max-width: 520px; }
@media (min-width: 920px) {
  body.no-chrome .app-root { grid-template-columns: 1fr; grid-template-areas: "main"; }
  body.no-chrome .desktop-side { display: none; }
}

/* offline banner */
.offline-banner {
  position: fixed; top: calc(var(--safe-top) + 8px); left: 50%; transform: translateX(-50%) translateY(-80px);
  z-index: var(--z-toast); padding: 8px 16px; border-radius: var(--r-full);
  background: var(--warning-soft); color: var(--warning); border: 1px solid var(--warning);
  font-size: 0.8rem; font-weight: var(--fw-semibold); transition: transform 0.4s var(--ease-glass);
}
.offline-banner.show { transform: translateX(-50%) translateY(0); }