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

:root {
  --page-max: 1400px;
  --gap: 1.25rem;
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2c3142;
  --text: #e8eaef;
  --muted: #9aa3b5;
  --accent: #5b8def;
  --accent-hover: #7aa3f5;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.header {
  margin-bottom: 2rem;
}

.nav {
  display: flex;
  flex-direction: row;
  gap: 0.5rem;
  align-items: stretch;
}

.nav__btn {
  padding: 0.85rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  text-align: center;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.nav__btn--tab {
  flex: 3;
}

.nav__btn--apk {
  flex: 1;
  max-width: 10%;
  font-size: 0.72rem;
  line-height: 1.2;
  padding: 0.5rem 0.35rem;
  border-color: var(--accent);
  color: var(--accent-hover);
  white-space: normal;
  word-break: break-word;
}

.nav__btn:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.nav__btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.nav__btn--apk:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.nav__btn--active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

.gallery {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.gallery__section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-margin-top: 1.25rem;
}

.section-shortcuts {
  position: fixed;
  right: 0.75rem;
  bottom: 0.75rem;
  right: max(0.75rem, env(safe-area-inset-right));
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 0.375rem;
  max-height: calc(100vh - 1.5rem);
  max-height: calc(100dvh - 1.5rem);
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: rgba(15, 17, 23, 0.94);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.section-shortcuts a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 3rem;
  min-height: 2.75rem;
  padding: 0.25rem 0.5rem;
  color: var(--accent-hover);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
}

.section-shortcuts a:hover {
  color: #fff;
  text-decoration: underline;
}

.section-shortcuts a:focus-visible {
  outline: 2px solid var(--accent-hover);
  outline-offset: -2px;
  border-radius: 0.25rem;
}

@media (max-height: 360px) {
  .section-shortcuts a {
    min-height: 1.75rem;
    padding-block: 0.125rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.section__title {
  margin: 0;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  overflow: hidden;
}

.card__thumb-wrap {
  aspect-ratio: 16 / 9;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card__thumb-wrap--portrait {
  aspect-ratio: 9 / 16;
}

.card__thumb {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.card__body {
  padding: 0.75rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.625rem;
}

.card__title {
  margin: 0;
  width: 100%;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-align: center;
  word-break: break-word;
}

.card__download {
  display: inline-block;
  padding: 0.4rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background: transparent;
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.card__download:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 3rem 1rem;
}

.footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer__link {
  display: inline-block;
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: 0.375rem;
  color: var(--accent-hover);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.footer__link:hover {
  background: var(--accent);
  color: #fff;
}

.footer__hint {
  font-size: 0.75rem;
  color: var(--muted);
}

/* Landing pad (index.html) */
.landing-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: radial-gradient(ellipse at 50% 30%, #1a2240 0%, var(--bg) 55%);
}

.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 2.5rem 1.75rem;
  width: min(92vw, 22rem);
}

.landing__enter,
.landing__download {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border-radius: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.12s, box-shadow 0.15s;
}

.landing__enter {
  min-height: 4.25rem;
  padding: 1.25rem 2.5rem;
  font-size: clamp(1.5rem, 5vw, 2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(180deg, #6b9af2 0%, var(--accent) 45%, #4a7ad4 100%);
  border: 2px solid #7aa3f5;
  color: #fff;
  box-shadow: 0 4px 24px rgba(91, 141, 239, 0.35), 0 1px 0 rgba(255, 255, 255, 0.12) inset;
}

.landing__enter:hover {
  background: linear-gradient(180deg, #7aa3f5 0%, var(--accent-hover) 45%, #5b8def 100%);
  border-color: #9bb8f7;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(91, 141, 239, 0.45), 0 1px 0 rgba(255, 255, 255, 0.15) inset;
}

.landing__enter:active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(91, 141, 239, 0.3);
}

.landing__download {
  min-height: 2.75rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: auto;
  min-width: 11rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.landing__download:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
  background: #222633;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .page {
    padding-top: 1rem;
  }

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

  .nav__btn--tab {
    flex: 1 1 28%;
  }

  .nav__btn--apk {
    flex: 1 1 100%;
    max-width: none;
    font-size: 0.85rem;
  }

  .nav__btn {
    flex: none;
    width: auto;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }
}