/* ==========================================================================
   Noturna — Base layer and shared components
   Shared by the marketing site, the quiz funnel and the app.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-normal);
  color: var(--fg-default);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overscroll-behavior-y: none;
}

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

h1,
h2,
h3,
h4 {
  color: var(--fg-strong);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
  text-wrap: balance;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: 0;
  background: none;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: var(--r-sm);
}

::selection {
  background: var(--blue-200);
  color: var(--ink-900);
}

/* --------------------------------------------------------------------------
   Layout primitives
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--app-width);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.container--narrow {
  max-width: 56rem;
}

.stack > * + * {
  margin-top: var(--s-4);
}

.stack-sm > * + * {
  margin-top: var(--s-2);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.row--between {
  justify-content: space-between;
}

.row--wrap {
  flex-wrap: wrap;
}

.spacer {
  flex: 1;
}

.center {
  text-align: center;
}

.muted {
  color: var(--fg-muted);
}

.faint {
  color: var(--fg-faint);
}

.balance {
  text-wrap: balance;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   Type helpers
   -------------------------------------------------------------------------- */

.eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--accent);
}

.display {
  font-size: clamp(1.9rem, 1.35rem + 2.4vw, var(--text-5xl));
  letter-spacing: var(--tracking-tighter);
  line-height: var(--leading-tight);
  font-weight: var(--weight-black);
}

.h1 {
  font-size: clamp(1.6rem, 1.2rem + 1.8vw, var(--text-4xl));
  letter-spacing: var(--tracking-tighter);
  line-height: 1.15;
}

.h2 {
  font-size: clamp(1.35rem, 1.1rem + 1.2vw, var(--text-3xl));
}

.h3 {
  font-size: var(--text-xl);
}

.lede {
  font-size: clamp(var(--text-lg), 1rem + 0.4vw, var(--text-xl));
  line-height: var(--leading-relaxed);
  color: var(--fg-default);
}

.small {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.tiny {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.strong {
  font-weight: var(--weight-bold);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  --btn-bg: var(--accent);
  --btn-fg: var(--white);
  --btn-bd: transparent;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  min-height: 3.125rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-full);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out),
    background-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out), opacity var(--dur-base);
  user-select: none;
}

.btn:hover {
  text-decoration: none;
  --btn-bg: var(--accent-hover);
}

.btn:active {
  transform: scale(0.985);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn--block {
  width: 100%;
}

.btn--sm {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  font-size: var(--text-base);
}

.btn--lg {
  min-height: 3.5rem;
  font-size: var(--text-xl);
  padding-inline: 2rem;
}

.btn--primary {
  box-shadow: var(--shadow-brand);
}

.btn--primary:hover {
  box-shadow: 0 12px 32px rgba(59, 92, 246, 0.4);
}

.btn--secondary {
  --btn-bg: var(--white);
  --btn-fg: var(--fg-strong);
  --btn-bd: var(--border-strong);
  box-shadow: var(--shadow-xs);
}

.btn--secondary:hover {
  --btn-bg: var(--gray-50);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--fg-default);
}

.btn--ghost:hover {
  --btn-bg: var(--gray-100);
}

.btn--quiet {
  --btn-bg: var(--gray-100);
  --btn-fg: var(--fg-default);
}

.btn--quiet:hover {
  --btn-bg: var(--gray-150);
}

.btn--danger {
  --btn-bg: var(--red-50);
  --btn-fg: var(--red-600);
}

/* --------------------------------------------------------------------------
   Cards & surfaces
   -------------------------------------------------------------------------- */

.card {
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  padding: var(--s-5);
  box-shadow: var(--shadow-xs);
}

.card--flat {
  box-shadow: none;
  background: var(--bg-subtle);
  border-color: transparent;
}

.card--tint {
  background: var(--bg-tint);
  border-color: var(--accent-soft-border);
}

.card--raised {
  box-shadow: var(--shadow-md);
}

.card--hero {
  border-radius: var(--r-2xl);
  padding: var(--s-6);
}

.divider {
  height: 1px;
  border: 0;
  background: var(--border-subtle);
  margin-block: var(--s-5);
}

/* Chips / badges */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--r-full);
  background: var(--bg-inset);
  color: var(--fg-muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}

.chip--brand {
  background: var(--accent-soft);
  color: var(--accent);
}

.chip--green {
  background: var(--green-50);
  color: var(--green-700);
}

.chip--amber {
  background: var(--amber-100);
  color: var(--amber-600);
}

.chip--red {
  background: var(--red-50);
  color: var(--red-600);
}

.chip--outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
}

/* Feature list with checkmarks */
.ticks {
  display: grid;
  gap: var(--s-3);
}

.ticks li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.ticks .tick {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  margin-top: -0.1rem;
  border-radius: var(--r-full);
  background: var(--green-50);
  color: var(--green-600);
  font-size: 0.75rem;
  font-weight: var(--weight-black);
}

.ticks--red .tick {
  background: var(--red-50);
  color: var(--red-600);
}

/* --------------------------------------------------------------------------
   Inputs
   -------------------------------------------------------------------------- */

.field {
  display: grid;
  gap: var(--s-2);
}

.field > label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--fg-strong);
}

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.95rem 1.1rem;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--r-md);
  background: var(--bg-app);
  color: var(--fg-strong);
  font-size: var(--text-md);
  transition: border-color var(--dur-base), box-shadow var(--dur-base);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--fg-faint);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--ring);
}

.textarea {
  min-height: 7rem;
  resize: vertical;
  line-height: var(--leading-relaxed);
}

.hint {
  font-size: var(--text-xs);
  color: var(--fg-muted);
}

/* Toggle switch */
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.switch .track {
  width: 2.75rem;
  height: 1.6rem;
  border-radius: var(--r-full);
  background: var(--gray-300);
  transition: background var(--dur-base) var(--ease-out);
  flex: none;
}

.switch .track::after {
  content: "";
  display: block;
  width: 1.3rem;
  height: 1.3rem;
  margin: 0.15rem;
  border-radius: var(--r-full);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out);
}

.switch input:checked + .track {
  background: var(--accent);
}

.switch input:checked + .track::after {
  transform: translateX(1.15rem);
}

.switch input:focus-visible + .track {
  box-shadow: var(--ring);
}

/* --------------------------------------------------------------------------
   Sticky app bar used by the funnel
   -------------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--bg-app) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

/* --------------------------------------------------------------------------
   Utility motion
   -------------------------------------------------------------------------- */

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.animate-in {
  animation: fade-up var(--dur-slow) var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}