/* ==========================================================================
   STUSHER LANDING — Design Tokens
   Cartoon-cinema visual system. Mirrors the Stusher app's identity:
   cream backgrounds, dark brown text, cartoon yellow accents,
   hard shadows (no blur), thick black borders, Fredoka typography.
   ========================================================================== */

:root {
  /* ----------------------------------------------------------------------
     Color palette — sourced from Stusher app DESIGN_SYSTEM.md
     ---------------------------------------------------------------------- */
  --color-primary:        #F4C542;   /* Cartoon yellow — Stella, CTAs */
  --color-primary-dark:   #E5B12A;
  --color-primary-light:  #FFE082;

  --color-secondary:      #2C3E50;   /* Dark blue — when contrast is needed */
  --color-accent:         #F7C17B;   /* Warm orange-gold */
  --color-accent-deep:    #D9831F;

  --color-cream:          #FFF9E5;   /* Page background */
  --color-cream-soft:     #FFFDF4;
  --color-paper:          #FFFFFF;   /* Cards on cream */

  --color-brown-darkest:  #1C0704;   /* Deep brown — hero/footer bg */
  --color-brown-deep:     #290D0C;   /* Section bg */
  --color-brown:          #421B11;   /* Primary text */
  --color-brown-soft:     #6B4423;   /* Secondary text */
  --color-brown-muted:    #9B8B7B;   /* Tertiary text, hints */

  --color-success:        #4CAF50;
  --color-danger:         #FF5252;
  --color-warning:        #FFC107;

  --color-border:         #000000;   /* Thick comic-style borders */
  --color-border-soft:    #421B11;

  /* ----------------------------------------------------------------------
     Typography — Fredoka (display/UI) + Inter (long-form body)
     ---------------------------------------------------------------------- */
  --font-display: 'Fredoka', system-ui, -apple-system, sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono:    'JetBrains Mono', 'Source Code Pro', ui-monospace, monospace;

  /* Fluid type scale — clamp(min, fluid, max) */
  --fs-display: clamp(2.5rem, 6vw + 1rem, 5rem);      /* hero */
  --fs-h1:      clamp(2rem, 4.5vw + 0.5rem, 3.5rem);
  --fs-h2:      clamp(1.625rem, 2.8vw + 0.5rem, 2.5rem);
  --fs-h3:      clamp(1.25rem, 1.5vw + 0.5rem, 1.625rem);
  --fs-lead:    clamp(1.125rem, 0.6vw + 1rem, 1.375rem);
  --fs-body:    1rem;
  --fs-small:   0.875rem;
  --fs-xs:      0.75rem;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semi:    600;
  --fw-bold:    700;

  --lh-tight:   1.1;
  --lh-snug:    1.25;
  --lh-normal:  1.5;
  --lh-loose:   1.7;

  /* ----------------------------------------------------------------------
     8pt spacing grid
     ---------------------------------------------------------------------- */
  --space-2xs: 0.25rem;
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* ----------------------------------------------------------------------
     Border-radius — rounded but not extreme (cartoon, not bubbly)
     ---------------------------------------------------------------------- */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-pill: 9999px;

  /* ----------------------------------------------------------------------
     Borders — comic-style, thick, black
     ---------------------------------------------------------------------- */
  --border-thin:  2px solid var(--color-border);
  --border-base:  3px solid var(--color-border);
  --border-thick: 4px solid var(--color-border);

  /* ----------------------------------------------------------------------
     Hard shadows — the Stusher signature.
     No blur, no opacity; pure offset.
     ---------------------------------------------------------------------- */
  --shadow-xs:   2px 2px 0 0 var(--color-border);
  --shadow-sm:   4px 4px 0 0 var(--color-border);
  --shadow-md:   6px 6px 0 0 var(--color-border);
  --shadow-lg:   8px 8px 0 0 var(--color-border);
  --shadow-xl:   12px 12px 0 0 var(--color-border);

  --shadow-yellow-md: 6px 6px 0 0 var(--color-primary);
  --shadow-cream-md:  6px 6px 0 0 var(--color-cream);

  /* ----------------------------------------------------------------------
     Motion — bouncy springs, intentional, never ornamental
     ---------------------------------------------------------------------- */
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);   /* overshoot bounce */
  --ease-snappy:   cubic-bezier(0.5, 0, 0.2, 1);
  --ease-out:      cubic-bezier(0.2, 0.8, 0.2, 1);

  --t-fast:    160ms;
  --t-base:    240ms;
  --t-slow:    400ms;

  /* ----------------------------------------------------------------------
     Layout
     ---------------------------------------------------------------------- */
  --container-narrow: 64rem;   /* 1024 */
  --container-base:   76rem;   /* 1216 */
  --container-wide:   88rem;   /* 1408 */
  --gutter:           clamp(1rem, 4vw, 2.5rem);

  /* ----------------------------------------------------------------------
     Z-index
     ---------------------------------------------------------------------- */
  --z-base:    1;
  --z-raised:  10;
  --z-sticky:  100;
  --z-overlay: 500;
  --z-modal:   1000;
  --z-toast:   2000;
}

/* ==========================================================================
   Reset & base
   ========================================================================== */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
  /* `clip` (not `hidden`) prevents horizontal overflow without turning <html>
     into a scroll container — so descendant `position: sticky` headers keep
     anchoring to the viewport. Set here (not on <body>) because overflow on
     <body> would still break sticky on the .site-header. */
  overflow-x: clip;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--color-brown);
  background-color: var(--color-cream);
  /* Elegant warm-sunrise gradient:
     - One large ellipse anchored above the top edge of the viewport
       (center −25% y) so the brightest part sits behind the header and
       fades smoothly into cream by ~78% — no visible seam where the
       header ends.
     - A subtle warm accent at the bottom-right corner for depth.
     `background-attachment: fixed` keeps the atmosphere consistent on scroll. */
  background-image:
    radial-gradient(
      ellipse 140% 90% at 50% -25%,
      rgba(244, 197, 66, 0.36) 0%,
      rgba(247, 193, 123, 0.20) 28%,
      rgba(247, 193, 123, 0.09) 50%,
      transparent 78%
    ),
    radial-gradient(
      ellipse 55% 45% at 100% 100%,
      rgba(247, 193, 123, 0.20) 0%,
      transparent 65%
    );
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
}

/* Headings — Fredoka, tight, bold */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--color-brown);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { line-height: var(--lh-loose); }

a {
  color: var(--color-brown);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-primary);
  transition: text-decoration-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out);
}

a:hover { text-decoration-color: var(--color-brown); }

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* Skip link, focus, selection */
.skip-link {
  position: absolute;
  top: -40px;
  left: var(--space-md);
  background: var(--color-brown);
  color: var(--color-cream);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  text-decoration: none;
  transition: top var(--t-base) var(--ease-out);
}
.skip-link:focus { top: var(--space-md); }

:focus-visible {
  outline: 3px solid var(--color-brown);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-brown);
}

/* ==========================================================================
   Layout primitives
   ========================================================================== */

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

.container--narrow { max-width: var(--container-narrow); }
.container--wide   { max-width: var(--container-wide); }

.section {
  padding-block: clamp(3rem, 7vw, 6rem);
  position: relative;
}

.section--dark {
  background-color: var(--color-brown-deep);
  color: var(--color-cream);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--color-cream); }

.section--cream-soft {
  background-color: var(--color-cream-soft);
}

.section-header {
  text-align: center;
  max-width: 44rem;
  margin: 0 auto var(--space-3xl);
}

.section-header__eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-semi);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-brown);
  background-color: var(--color-primary);
  padding: var(--space-xs) var(--space-md);
  border: var(--border-base);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-xs);
  margin-bottom: var(--space-md);
}

.section-header__title { margin-bottom: var(--space-md); }

.section-header__lead {
  font-size: var(--fs-lead);
  color: var(--color-brown-soft);
}

.section--dark .section-header__lead { color: var(--color-cream); opacity: 0.9; }

/* Visually-hidden (sr-only) */
.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;
}

/* ==========================================================================
   Buttons — cartoon CTAs with hard shadow lift
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: 1.0625rem;
  line-height: 1;
  padding: var(--space-md) var(--space-xl);
  border: var(--border-base);
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--t-base) var(--ease-spring),
    box-shadow var(--t-base) var(--ease-spring),
    background-color var(--t-fast) var(--ease-out);
  white-space: nowrap;
  user-select: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-brown);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-primary-light);
}

.btn--primary:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-xs);
}

.btn--secondary {
  background-color: var(--color-cream);
  color: var(--color-brown);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-paper);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-brown);
  border: var(--border-thin);
  box-shadow: none;
}

.btn--ghost:hover {
  background-color: var(--color-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
  transform: translate(-1px, -1px);
}

.btn--lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.1875rem;
}

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

.btn__icon {
  width: 1.25em;
  height: 1.25em;
}

/* Store badge — Google Play (with official wordmark) */
.store-badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-brown-darkest);
  color: var(--color-cream);
  border: var(--border-base);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform var(--t-base) var(--ease-spring),
              box-shadow var(--t-base) var(--ease-spring);
  min-width: 11rem;
}

.store-badge:hover,
.store-badge:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.store-badge__text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.15;
}

.store-badge__small {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  opacity: 0.85;
}

/* Official Google Play wordmark — height drives sizing, width auto preserves
   the 5:1 native ratio of the SVG. */
.store-badge__wordmark {
  height: 1.6rem;
  width: auto;
  display: block;
}

.store-badges-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ==========================================================================
   Card
   ========================================================================== */

.card {
  background-color: var(--color-paper);
  border: var(--border-base);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-xl);
  transition: transform var(--t-base) var(--ease-spring),
              box-shadow var(--t-base) var(--ease-spring);
}

.card--lift:hover {
  transform: translate(-3px, -3px) rotate(-0.4deg);
  box-shadow: var(--shadow-lg);
}

.card--cream {
  background-color: var(--color-cream-soft);
}

.card--accent {
  background-color: var(--color-primary);
}

/* ==========================================================================
   Comic speech bubble
   ========================================================================== */

.bubble {
  position: relative;
  background-color: var(--color-paper);
  border: var(--border-base);
  border-radius: var(--radius-xl);
  padding: var(--space-lg) var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.bubble::after {
  content: "";
  position: absolute;
  left: 28px;
  bottom: -18px;
  width: 28px;
  height: 22px;
  background-color: var(--color-paper);
  border-right: var(--border-base);
  border-bottom: var(--border-base);
  transform: skewX(-20deg);
}

.bubble--right::after { left: auto; right: 28px; transform: skewX(20deg); }
.bubble--accent { background-color: var(--color-primary); }
.bubble--accent::after { background-color: var(--color-primary); }

/* ==========================================================================
   Tag / chip / pill
   ========================================================================== */

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-display);
  font-weight: var(--fw-semi);
  font-size: var(--fs-small);
  padding: var(--space-2xs) var(--space-md);
  border: var(--border-thin);
  border-radius: var(--radius-pill);
  background-color: var(--color-paper);
  color: var(--color-brown);
}

.tag--primary { background-color: var(--color-primary); }
.tag--cream   { background-color: var(--color-cream); }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 600ms var(--ease-out),
    transform 600ms var(--ease-spring);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="1"] { transition-delay: 80ms; }
[data-reveal-delay="2"] { transition-delay: 160ms; }
[data-reveal-delay="3"] { transition-delay: 240ms; }
[data-reveal-delay="4"] { transition-delay: 320ms; }
[data-reveal-delay="5"] { transition-delay: 400ms; }

/* ==========================================================================
   Floating cartoon decorations
   ========================================================================== */

.floater {
  position: absolute;
  pointer-events: none;
  user-select: none;
  filter: drop-shadow(2px 4px 0 rgba(0, 0, 0, 0.18));
}

@keyframes float-soft {
  0%, 100% { transform: translateY(0) rotate(var(--rot, 0deg)); }
  50%      { transform: translateY(-14px) rotate(calc(var(--rot, 0deg) + 4deg)); }
}

@keyframes spin-slow {
  to { transform: rotate(360deg); }
}

@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  25%      { transform: rotate(-6deg); }
  75%      { transform: rotate(6deg); }
}

.is-floating { animation: float-soft 6s ease-in-out infinite; }
.is-spinning { animation: spin-slow 18s linear infinite; }
.is-wiggling { animation: wiggle 3s ease-in-out infinite; }