/* ============================================================================
   Base: reset, typography, primitives (buttons, fields, switches, chips),
   and the global feedback layers (toasts, alerts, connection pill).
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-md);
  line-height: 1.45;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
}
h3 {
  font-size: var(--fs-xl);
}

a {
  color: var(--primary-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}
.icon {
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}
[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}
button {
  background: none;
  border: 0;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

::selection {
  background: color-mix(in oklab, var(--primary) 26%, transparent);
}

.hidden {
  display: none !important;
}
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* One focus treatment everywhere, only for keyboard users. */
:focus {
  outline: none;
}
:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: var(--r-sm);
}
input:focus-visible,
textarea:focus-visible {
  box-shadow: none;
}

/* Scrollbars: thin and quiet. */
* {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in oklab, var(--text) 18%, transparent) transparent;
}
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-thumb {
  background: color-mix(in oklab, var(--text) 16%, transparent);
  border: 3px solid transparent;
  background-clip: padding-box;
  border-radius: 99px;
}
::-webkit-scrollbar-track {
  background: transparent;
}

kbd {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: 3px 8px;
  border-radius: var(--r-xs);
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  color: var(--text);
  white-space: nowrap;
}

/* ---------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */
.btn,
.modal-btn,
.tour-next,
.key-banner-btn,
.secondary-btn,
.danger-btn,
.mini-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  min-height: var(--tap);
  padding: 0 var(--s-5);
  border-radius: var(--r-full);
  font-weight: 600;
  font-size: var(--fs-md);
  line-height: 1;
  white-space: nowrap;
  transition: background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease),
    transform var(--dur-1) var(--ease), box-shadow var(--dur-2) var(--ease);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}
.btn:active:not(:disabled),
.modal-btn:active:not(:disabled),
.secondary-btn:active:not(:disabled),
.danger-btn:active:not(:disabled),
.mini-btn:active:not(:disabled),
.tour-next:active:not(:disabled) {
  transform: scale(0.97);
}

.btn-primary,
.modal-btn,
.tour-next,
.key-banner-btn {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset, 0 6px 16px -6px color-mix(in oklab, var(--primary) 70%, transparent);
}
.btn-primary:hover:not(:disabled),
.modal-btn:hover:not(:disabled),
.tour-next:hover:not(:disabled),
.key-banner-btn:hover:not(:disabled) {
  background: var(--primary-strong);
}
/* In a confirm dialog the neutral choice is the plain one. */
.modal-btn:not(.danger) {
  background: var(--surface-3);
  color: var(--text);
  box-shadow: none;
}
.modal-btn:not(.danger):hover:not(:disabled) {
  background: var(--border);
}
.modal-btn.danger {
  background: var(--danger);
  color: #fff;
  box-shadow: none;
}
.modal-btn.danger:hover:not(:disabled) {
  background: color-mix(in oklab, var(--danger) 85%, black);
}

.btn-lg {
  min-height: 52px;
  padding: 0 var(--s-6);
  font-size: var(--fs-lg);
}
.btn-block {
  width: 100%;
}

.secondary-btn,
.btn-secondary,
.key-banner-btn.secondary {
  background: var(--surface-3);
  color: var(--text);
  box-shadow: none;
}
.secondary-btn:hover:not(:disabled),
.btn-secondary:hover:not(:disabled),
.key-banner-btn.secondary:hover:not(:disabled) {
  background: var(--border);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-hover);
}

.danger-btn {
  background: var(--danger-soft);
  color: var(--danger);
}
.danger-btn:hover:not(:disabled) {
  background: var(--danger);
  color: #fff;
}

.mini-btn {
  min-height: 36px;
  padding: 0 var(--s-4);
  font-size: var(--fs-sm);
  background: var(--surface-3);
  color: var(--text);
}
.mini-btn:hover:not(:disabled) {
  background: var(--border);
}

/* Square icon-only buttons. */
.icon-btn,
.header-icon-btn,
.back-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: var(--r-full);
  color: var(--text-2);
  transition: background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease), transform var(--dur-1) var(--ease);
}
.icon-btn:hover,
.header-icon-btn:hover,
.back-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
}
.icon-btn:active,
.header-icon-btn:active,
.back-btn:active {
  transform: scale(0.94);
}

/* Busy state (util.js withBusy sets aria-busy): a spinner, same label width. */
button[aria-busy="true"]::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-right-color: transparent;
  animation: spin 0.7s linear infinite;
  flex: none;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Press ripple (util.js attachRipples). */
.rippling::after {
  content: "";
  position: absolute;
  left: var(--rx, 50%);
  top: var(--ry, 50%);
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.22;
  pointer-events: none;
  animation: ripple 0.6s var(--ease-out) forwards;
}
@keyframes ripple {
  to {
    transform: scale(26);
    opacity: 0;
  }
}

.link-btn,
.auth-switch a,
.text-link {
  color: var(--primary-text);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--r-xs);
}
.link-btn:hover,
.auth-switch a:hover,
.text-link:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------------------------
   Fields
   ------------------------------------------------------------------------- */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="tel"],
textarea,
.field {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 1rem; /* 16px: stops iOS zooming into a focused field */
  transition: border-color var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease);
}
input::placeholder,
textarea::placeholder {
  color: var(--text-3);
  opacity: 1;
}
input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
textarea:hover {
  border-color: var(--border-strong);
}
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
textarea:focus,
.field:focus-within {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 4px var(--primary-soft);
}
input[aria-invalid="true"] {
  border-color: var(--danger);
}
input[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 4px var(--danger-soft);
}

.shake {
  animation: shakeX 0.4s var(--ease);
}
@keyframes shakeX {
  20%,
  60% {
    transform: translateX(-6px);
  }
  40%,
  80% {
    transform: translateX(6px);
  }
}

/* Checkbox rendered as a switch. */
input.switch {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 44px;
  height: 26px;
  border-radius: var(--r-full);
  background: var(--border-strong);
  position: relative;
  cursor: pointer;
  transition: background-color var(--dur-2) var(--ease);
}
input.switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  transition: transform var(--dur-2) var(--ease-spring);
}
input.switch:checked {
  background: var(--primary);
}
input.switch:checked::after {
  transform: translateX(18px);
}
input.switch:focus-visible {
  box-shadow: var(--focus);
}

input[type="checkbox"]:not(.switch) {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

/* ---------------------------------------------------------------------------
   Chips and segmented choices (Settings, chat info)
   ------------------------------------------------------------------------- */
.chip,
.wallpaper-chip,
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 14px;
  border-radius: var(--r-full);
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
  transition: background-color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.chip:hover,
.wallpaper-chip:hover,
.info-chip:hover {
  border-color: var(--border-strong);
  background: var(--surface-hover);
}
.chip.selected,
.chip[aria-pressed="true"],
.chip[aria-checked="true"],
.wallpaper-chip.selected,
.info-chip.selected,
.info-chip.on {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary-text);
}

.segmented {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  background: var(--surface-3);
  border-radius: var(--r-full);
}
.segmented button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 14px;
  border-radius: var(--r-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-2);
  transition: background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.segmented button[aria-checked="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-1);
}
:root[data-theme="dark"] .segmented button[aria-checked="true"] {
  background: var(--border-strong);
}

/* ---------------------------------------------------------------------------
   Avatars (util.js setAvatar fills text or an <img>)
   ------------------------------------------------------------------------- */
.avatar {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}
.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------------------------------------------------------------------------
   Toasts (util.js showToast)
   ------------------------------------------------------------------------- */
#toast-container {
  position: fixed;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: min(92vw, 440px);
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--r-md);
  background: var(--brand-ink);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1.4;
  box-shadow: var(--shadow-3);
  animation: toastIn var(--dur-3) var(--ease-out);
}
:root[data-theme="dark"] .toast {
  background: #f3f0f7;
  color: #15121c;
}
.toast::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-3);
}
.toast-error::before {
  background: #ff6b5e;
}
.toast-success::before {
  background: var(--online);
}
.toast-hide {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
}
/* Lift toasts above the composer / bottom nav. */
body.in-app #toast-container {
  bottom: calc(96px + env(safe-area-inset-bottom));
}

/* ---------------------------------------------------------------------------
   In-app alert banners (notifications.js)
   ------------------------------------------------------------------------- */
#alert-host {
  position: fixed;
  top: calc(14px + env(safe-area-inset-top));
  right: 14px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(360px, calc(100vw - 28px));
  pointer-events: none;
}
.alert-card {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 12px 12px 14px;
  border-radius: var(--r-lg);
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-3);
  cursor: pointer;
  animation: alertIn var(--dur-3) var(--ease-spring);
}
.alert-avatar {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 700;
  font-family: var(--font-display);
}
.alert-body {
  flex: 1;
  min-width: 0;
}
.alert-title {
  font-weight: 700;
  font-size: var(--fs-sm);
}
.alert-text {
  color: var(--text-2);
  font-size: var(--fs-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.alert-close {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  color: var(--text-3);
}
.alert-close:hover {
  background: var(--surface-3);
  color: var(--text);
}
.alert-hide {
  opacity: 0;
  transform: translateX(16px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
@keyframes alertIn {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.97);
  }
}

/* ---------------------------------------------------------------------------
   Connection pill (connection.js)
   ------------------------------------------------------------------------- */
.connection-pill {
  position: fixed;
  top: calc(12px + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 12px;
  border-radius: var(--r-full);
  background: var(--brand-ink);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 600;
  box-shadow: var(--shadow-2);
  animation: toastIn var(--dur-3) var(--ease-out);
}
.connection-pill::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-sun);
  animation: pulseDot 1.2s ease-in-out infinite;
}
.connection-pill[data-state="offline"]::before {
  background: #ff6b5e;
  animation: none;
}
@keyframes pulseDot {
  50% {
    opacity: 0.35;
  }
}

/* ---------------------------------------------------------------------------
   Ambient layers behind the app (settings.js / effects.js)
   ------------------------------------------------------------------------- */
#aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(48% 42% at 12% 0%, color-mix(in oklab, var(--primary) 14%, transparent), transparent 70%),
    radial-gradient(40% 40% at 100% 100%, color-mix(in oklab, var(--brand-grape) 9%, transparent), transparent 70%);
}
:root[data-theme="dark"] #aurora {
  background:
    radial-gradient(50% 45% at 8% 0%, color-mix(in oklab, var(--glow-a) 26%, transparent), transparent 70%),
    radial-gradient(45% 45% at 100% 100%, color-mix(in oklab, var(--glow-b) 24%, transparent), transparent 70%),
    radial-gradient(30% 30% at 60% 40%, color-mix(in oklab, var(--primary) 8%, transparent), transparent 70%);
  animation: auroraDrift 36s ease-in-out infinite alternate;
}
.no-aurora #aurora {
  display: none;
}
@keyframes auroraDrift {
  to {
    transform: translate3d(2%, 3%, 0) scale(1.06);
  }
}
#fx-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  display: none;
}

/* Custom cursor (Settings → Appearance → Extras). */
body.custom-cursor,
body.custom-cursor * {
  cursor: none !important;
}
#cursor-dot {
  position: fixed;
  z-index: var(--z-cursor);
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--primary);
  pointer-events: none;
  display: none;
  transition: width var(--dur-2) var(--ease), height var(--dur-2) var(--ease), margin var(--dur-2) var(--ease), background-color var(--dur-2);
}
#cursor-dot.big {
  width: 30px;
  height: 30px;
  margin: -15px 0 0 -15px;
  background: var(--primary-soft);
  border: 1.5px solid var(--primary);
}
#cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  pointer-events: none;
  display: none;
  background: radial-gradient(circle, color-mix(in oklab, var(--primary) 16%, transparent), transparent 65%);
}

/* The app-lock gate hides everything behind the PIN prompt. */
body.app-locked > *:not(#pin-modal):not(#toast-container):not(#aurora) {
  visibility: hidden;
}
body.app-locked #pin-modal {
  background: var(--bg);
}