/*
 * gamepad-academy — global stylesheet
 * Zero-dependency plain CSS. Shared by every page.
 * Audience: a 7-year-old. Large targets, high contrast, zero-stress.
 */

/* ---------------------------------------------------------------------------
 * 1. CSS Reset
 * ------------------------------------------------------------------------- */

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: inherit;
}

ul,
ol {
  list-style: none;
}

/* ---------------------------------------------------------------------------
 * 2. Design Tokens (custom properties)
 *    Child-friendly, high-contrast palette. AA-ish contrast for text.
 * ------------------------------------------------------------------------- */

:root {
  /* Color palette */
  --c-bg: #0f1424;          /* deep night-sky page background */
  --c-surface: #1e2640;     /* cards / panels sitting on bg */
  --c-surface-raised: #2a3457; /* hover/elevated surface */
  --c-primary: #ffd23f;     /* warm yellow — primary actions / titles */
  --c-accent: #4ecdc4;      /* teal — secondary accent */
  --c-text: #f4f7ff;        /* near-white on dark bg (high contrast) */
  --c-muted: #aeb8d8;       /* dimmer text, still readable on bg/surface */
  --c-success: #7bed9f;     /* soft green — positive feedback */
  --c-danger: #ff6b6b;      /* soft red — never a fail state, only emphasis */

  /* Spacing scale (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-pill: 9999px;

  /* Font sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-md: 1rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 3rem;

  /* Shadows */
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.45);

  /* Motion */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;

  /* Focus ring */
  --focus-outline: 4px solid var(--c-primary);
  --focus-outline-offset: 3px;
}

/* ---------------------------------------------------------------------------
 * 3. Base body
 * ------------------------------------------------------------------------- */

body {
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    'Noto Sans',
    sans-serif;
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg);
}

h1,
h2,
h3 {
  line-height: 1.2;
  color: var(--c-primary);
  font-weight: 800;
}

h1 {
  font-size: var(--fs-2xl);
}

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

p {
  max-width: 65ch;
}

/* ---------------------------------------------------------------------------
 * 4. Accessibility — focus + reduced motion
 * ------------------------------------------------------------------------- */

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
  border-radius: var(--radius-sm);
}

/* Never strip focus; make it obvious on every interactive element. */
.card:focus-visible,
.back-home:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
a:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

@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;
  }
}

/* ---------------------------------------------------------------------------
 * 5. Layout helpers
 * ------------------------------------------------------------------------- */

.page {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding: var(--space-6) var(--space-4);
}

.page__title {
  margin-bottom: var(--space-5);
  text-align: center;
}

/* Homepage logo — constrain the SVG (intrinsic ~661px) to a tasteful size. */
.page__title img {
  width: clamp(8rem, 24vw, 11rem);
  height: auto;
  margin-inline: auto;
  margin-bottom: var(--space-3);
}

.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;
}

/* ---------------------------------------------------------------------------
 * 6. Card grid + cards (homepage game cards)
 * ------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  padding: var(--space-4) 0;
}

.card {
  display: block;
  min-height: 88px;
  padding: var(--space-5);
  background-color: var(--c-surface);
  color: var(--c-text);
  text-decoration: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 2px solid transparent;
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}

.card:active {
  transform: translateY(-1px);
}

.card__title {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--c-primary);
  text-decoration: none;
}

.card__desc {
  color: var(--c-muted);
  font-size: var(--fs-sm);
}

/* ---------------------------------------------------------------------------
 * 7. Back to Home button — always visible, large target
 * ------------------------------------------------------------------------- */

.back-home {
  position: sticky;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  background-color: var(--c-primary);
  color: #1a1200;
  font-weight: 700;
  font-size: var(--fs-md);
  text-decoration: none;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.back-home:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.back-home:active {
  transform: translateY(0);
}

/* Sticky wrapper so the button can sit at top-left of the page. */
.back-home-row {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: var(--space-3) var(--space-4);
}

/* ---------------------------------------------------------------------------
 * 8. Gamepad connection banner — non-blocking hint
 * ------------------------------------------------------------------------- */

.gamepad-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  margin: 0 0 var(--space-4);
  background-color: var(--c-surface);
  border: 1px solid var(--c-accent);
  border-radius: var(--radius-md);
  color: var(--c-text);
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-sm);
}

.gamepad-banner__dot {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--c-muted);
}

.gamepad-banner.is-connected .gamepad-banner__dot {
  background-color: var(--c-success);
}

.gamepad-banner.is-connected {
  border-color: var(--c-success);
}

/* ---------------------------------------------------------------------------
 * 9. Face-button glyph (positional diamond)
 *    DOM produced by shared/glyph.js (later task). Styles defined here.
 *
 *    Layout: a square relative container with 4 pads arranged in a diamond —
 *    bottom, right, left, top — around a center. The pad carrying
 *    .is-active or [data-active] is filled/highlighted.
 * ------------------------------------------------------------------------- */

.face-glyph {
  position: relative;
  display: inline-block;
  width: 80px;
  height: 80px;
}

.face-glyph__pad {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--c-surface-raised);
  color: var(--c-text);
  font-size: var(--fs-xs);
  font-weight: 700;
  border: 2px solid var(--c-muted);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

/* Diamond positions (centered around the 80x80 container). */
.face-glyph__pad--top {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.face-glyph__pad--bottom {
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.face-glyph__pad--left {
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.face-glyph__pad--right {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

/* Active state — works via class or attribute, per task spec. */
.face-glyph__pad.is-active,
.face-glyph__pad[data-active] {
  background-color: var(--c-primary);
  color: #1a1200;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(255, 210, 63, 0.35);
}

/* Keep the centering transform on active pads that also translate. */
.face-glyph__pad.is-active.face-glyph__pad--top,
.face-glyph__pad[data-active].face-glyph__pad--top {
  transform: translateX(-50%) scale(1.08);
}

.face-glyph__pad.is-active.face-glyph__pad--bottom,
.face-glyph__pad[data-active].face-glyph__pad--bottom {
  transform: translateX(-50%) scale(1.08);
}

.face-glyph__pad.is-active.face-glyph__pad--left,
.face-glyph__pad[data-active].face-glyph__pad--left {
  transform: translateY(-50%) scale(1.08);
}

.face-glyph__pad.is-active.face-glyph__pad--right,
.face-glyph__pad[data-active].face-glyph__pad--right {
  transform: translateY(-50%) scale(1.08);
}

/* Optional center label slot (e.g., layout name). */
.face-glyph__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--fs-xs);
  color: var(--c-muted);
  pointer-events: none;
}