/* Global base styles — HellSpin */

html {
  overflow-x: clip;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-body);
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  overflow-x: clip;
}

main {
  display: block;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--color-heading-gold);
  color: var(--color-btn-text-dark);
  font-weight: var(--font-weight-semibold);
  border-radius: 0 0 var(--radius-card) 0;
  transform: translateY(calc(-100% - 8px));
  transition: transform var(--transition-base);
}

.skip-link:focus {
  transform: translateY(0);
}

/* Focus visibility (WCAG) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-container-padding);
}

/* Narrower reading-column container: used everywhere body copy, tables,
   inline content images, FAQ and the TOC are shown, so nothing (text or
   images) extends wider than the running text column. */
.container--content {
  max-width: var(--content-max-width);
}

/* Section rhythm */
.section {
  padding-block: calc(var(--space-section-gap) / 2);
}

.section__intro {
  margin-bottom: var(--space-h2-text-gap);
}

.section__intro p + p,
.content-section p + p,
.content-section .content-list + p,
.content-section .data-table-wrap + p,
.section__intro .content-list + p {
  margin-top: var(--space-paragraph-gap);
}

.content-section .content-list,
.content-section .data-table-wrap {
  margin-top: var(--space-paragraph-gap);
}

/* Headings */
h1,
h2,
h3 {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading-gold);
  line-height: 1.25;
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: var(--font-size-h2);
  margin-bottom: var(--space-h2-text-gap);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

h3 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--space-h3-text-gap);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

p {
  color: var(--color-text-body);
}

/* Lists inside content */
.content-list {
  display: grid;
  gap: 0.6rem;
  margin-top: var(--space-paragraph-gap);
}

.content-list__item {
  position: relative;
  padding-left: 1.4rem;
  color: var(--color-text-body);
}

.content-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-bg);
}

.content-list--ordered {
  counter-reset: hs-counter;
}

.content-list--ordered .content-list__item {
  counter-increment: hs-counter;
}

.content-list--ordered .content-list__item::before {
  content: counter(hs-counter);
  width: auto;
  height: auto;
  top: 0;
  border-radius: 0;
  background: none;
  color: var(--color-heading-gold);
  font-weight: var(--font-weight-bold);
  font-size: 0.85em;
}

/* Tables */
.data-table-wrap {
  margin-top: var(--space-paragraph-gap);
  overflow-x: auto;
  border-radius: var(--radius-card);
  background: var(--color-bg-dark);
}

.data-table {
  min-width: 100%;
}

.data-table caption {
  caption-side: top;
  text-align: left;
  padding: 0.75rem 1rem 0;
  color: var(--color-heading-gold);
  font-weight: var(--font-weight-semibold);
}

.data-table th,
.data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  font-size: var(--font-size-small);
  color: var(--color-text-body);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.data-table th {
  color: var(--color-heading-gold);
  font-weight: var(--font-weight-semibold);
  background: rgba(255, 194, 31, 0.08);
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-card);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-body);
  white-space: nowrap;
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

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

.btn--primary:hover,
.btn--primary:focus-visible {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-accent-bg);
  border: 1px solid var(--color-btn-secondary-border);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background: rgba(255, 194, 31, 0.1);
}

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

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: var(--font-size-small);
  color: var(--color-text-body);
}

.breadcrumb a {
  color: var(--color-text-body);
  transition: color var(--transition-base);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-heading-gold);
}

.breadcrumb__sep {
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--color-heading-gold);
}

/* Cards grid utility */
.card-grid {
  display: grid;
  gap: var(--space-card-gap);
  grid-template-columns: repeat(1, 1fr);
}

@media (min-width: 480px) {
  .card-grid--2up {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .card-grid--3up {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid--4up {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Content-section image handling */
.content-section__media {
  margin-block: var(--space-paragraph-gap);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-bg-dark);
}

.content-section__media img {
  width: 100%;
  height: auto;
  display: block;
}

/* Bonus card grid (Bonus page) */
.bonus-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: var(--space-card-padding);
  background: var(--color-bg-dark);
  border-radius: var(--radius-card);
}

.bonus-card__media {
  aspect-ratio: 16 / 10;
  border-radius: calc(var(--radius-card) - 2px);
  overflow: hidden;
  background: #0c1226;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bonus-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.bonus-card__title {
  margin: 0;
}

.bonus-card__text {
  flex-grow: 1;
  font-size: var(--font-size-small);
}

/* App platform grid (App page) */
.platform-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: var(--space-card-padding);
  background: var(--color-bg-dark);
  border-radius: var(--radius-card);
}

.platform-card__icon {
  width: 56px;
  height: 56px;
}

/* Scroll-to-top button */
.scroll-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-btn-accent);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-card);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 90;
}

.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* 404 page */
.not-found__inner {
  min-height: 50dvh;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 1rem;
  text-align: left;
}

.not-found__code {
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-accent-bg);
  line-height: 1;
}

.not-found__text {
  max-width: 60ch;
}

/* Visually hidden utility (accessible labels) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Fade-in animation hook (opt-in via JS) */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}