/* Reset + typography + app shell layout. */

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-app);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient ocean-gradient background, fixed behind all content. */
.app-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 15% -10%, color-mix(in srgb, var(--accent-500) 22%, transparent), transparent 55%),
    radial-gradient(100% 80% at 100% 0%, color-mix(in srgb, var(--gold-500) 12%, transparent), transparent 50%),
    linear-gradient(180deg, var(--ocean-950) 0%, var(--ocean-900) 45%, var(--ocean-950) 100%);
}

:root[data-theme="light"] .app-background {
  background:
    radial-gradient(120% 90% at 15% -10%, color-mix(in srgb, var(--accent-500) 16%, transparent), transparent 55%),
    radial-gradient(100% 80% at 100% 0%, color-mix(in srgb, var(--gold-500) 10%, transparent), transparent 50%),
    linear-gradient(180deg, #eef3f9 0%, #dbe7f3 45%, #eef3f9 100%);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .app-background {
    background:
      radial-gradient(120% 90% at 15% -10%, color-mix(in srgb, var(--accent-500) 16%, transparent), transparent 55%),
      radial-gradient(100% 80% at 100% 0%, color-mix(in srgb, var(--gold-500) 10%, transparent), transparent 50%),
      linear-gradient(180deg, #eef3f9 0%, #dbe7f3 45%, #eef3f9 100%);
  }
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4, p {
  margin: 0;
}

.app-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px) + var(--space-4));
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg-app) 72%, transparent);
  border-bottom: 1px solid var(--border-subtle);
}

.topbar__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.topbar__action {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.page {
  flex: 1;
  padding: var(--space-4);
  max-width: 560px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page--no-pad {
  padding: 0;
}

.scroll-x {
  overflow-x: auto;
  scrollbar-width: none;
}
.scroll-x::-webkit-scrollbar {
  display: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border-radius: var(--radius-md);
}
.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    transparent 30%,
    color-mix(in srgb, #ffffff 12%, transparent) 50%,
    transparent 70%
  );
  animation: skeleton-sweep 1.4s ease-in-out infinite;
}

@keyframes skeleton-sweep {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

.toast-stack {
  position: fixed;
  top: calc(var(--topbar-height) + var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: min(92vw, 420px);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lift);
  font-size: 14px;
  font-weight: 600;
  animation: toast-in 0.35s var(--ease-out-soft);
}
.toast--success { border-color: color-mix(in srgb, var(--success-500) 50%, transparent); }
.toast--error { border-color: color-mix(in srgb, var(--danger-500) 55%, transparent); }
.toast--fade-out { animation: toast-out 0.3s var(--ease-out-soft) forwards; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-12px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateY(-10px) scale(0.98); }
}