/* =========================================================
   APKWorld — Design System
   Original visual identity. No third-party UI framework.
   ========================================================= */

:root {
  --color-primary: #3854e0;
  --color-primary-dark: #2740b8;
  --color-accent: #e0662c;
  --color-accent-dark: #c05320;
  --color-ink: #16192b;
  --color-ink-soft: #4c5170;
  --color-muted: #7d8299;
  --color-border: #e3e6f0;
  --color-surface: #ffffff;
  --color-surface-alt: #f5f7fc;
  --color-success: #0e9f6e;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 1px 2px rgba(22, 25, 43, 0.06), 0 1px 12px rgba(22, 25, 43, 0.06);
  --shadow-pop: 0 12px 32px rgba(22, 25, 43, 0.16);
  --container-w: 1180px;
  --header-h: 68px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-surface);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; color: var(--color-ink); }
p { margin: 0 0 1em; color: var(--color-ink-soft); }
table { border-collapse: collapse; width: 100%; }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 20px;
}

.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;
}

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-primary);
  color: #fff; padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 1rem; border: none; cursor: pointer;
  text-decoration: none; transition: background-color .15s ease, transform .05s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-download { background: var(--color-accent); color: #fff; }
.btn-download:hover { background: var(--color-accent-dark); }
.btn-disabled, .btn-download.btn-disabled {
  background: var(--color-border); color: var(--color-muted); cursor: not-allowed;
}
.btn-secondary { background: var(--color-surface-alt); color: var(--color-ink); border: 1px solid var(--color-border); }
.btn-secondary:hover { background: #eceffa; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.header-row {
  display: flex; align-items: center; gap: 20px;
  height: var(--header-h);
}
.logo { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.logo-mark svg { width: 34px; height: 34px; display: block; }
.logo-text { font-size: 1.25rem; font-weight: 800; color: var(--color-ink); letter-spacing: -0.01em; }
.logo-accent { color: var(--color-primary); }

.header-search { position: relative; flex: 1; max-width: 480px; display: flex; }
.header-search input {
  width: 100%; padding: 10px 44px 10px 14px; border-radius: 999px;
  border: 1px solid var(--color-border); background: var(--color-surface-alt);
  font-size: 0.95rem; color: var(--color-ink);
}
.header-search button {
  position: absolute; right: 4px; top: 4px; bottom: 4px; width: 36px;
  background: var(--color-primary); border: none; border-radius: 999px; color: #fff;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
}
.search-suggest {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop); max-height: 360px; overflow-y: auto; z-index: 50;
}
.search-suggest a {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  color: var(--color-ink); border-bottom: 1px solid var(--color-border);
}
.search-suggest a:last-child { border-bottom: none; }
.search-suggest a:hover, .search-suggest a.is-focused { background: var(--color-surface-alt); text-decoration: none; }
.search-suggest img { width: 28px; height: 28px; border-radius: 6px; flex-shrink: 0; }
.search-suggest .s-name { font-weight: 600; font-size: 0.92rem; }
.search-suggest .s-type { font-size: 0.78rem; color: var(--color-muted); }
.search-suggest .s-empty { padding: 14px; color: var(--color-muted); font-size: 0.9rem; }

.primary-nav ul { display: flex; gap: 4px; }
.primary-nav a {
  display: block; padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--color-ink-soft); font-weight: 600; font-size: 0.95rem;
}
.primary-nav a:hover { background: var(--color-surface-alt); text-decoration: none; }
.primary-nav a.is-active { color: var(--color-primary); background: #eaeeff; }

.menu-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); cursor: pointer; flex-shrink: 0;
}
.menu-toggle span { width: 18px; height: 2px; background: var(--color-ink); margin: 0 auto; transition: transform .2s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { border-bottom: 1px solid var(--color-border); background: var(--color-surface-alt); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 20px; font-size: 0.85rem; }
.breadcrumbs li { color: var(--color-muted); display: flex; align-items: center; gap: 6px; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 6px; color: var(--color-border); }
.breadcrumbs a { color: var(--color-ink-soft); }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(135deg, #eef1ff 0%, #f7f4ff 100%); padding: 56px 0 44px; }
.hero-inner { text-align: center; max-width: 760px; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.hero-sub { font-size: 1.05rem; }
.hero-search { display: flex; gap: 10px; max-width: 520px; margin: 24px auto 16px; }
.hero-search input {
  flex: 1; padding: 14px 16px; border-radius: 999px; border: 1px solid var(--color-border);
  font-size: 1rem;
}
.hero-search button {
  padding: 0 26px; border-radius: 999px; border: none; background: var(--color-primary);
  color: #fff; font-weight: 700; cursor: pointer;
}
.hero-search button:hover { background: var(--color-primary-dark); }
.hero-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; font-weight: 600; }

/* ---------- Sections ---------- */
.home-section { margin: 48px auto; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; gap: 12px; }
.section-heading h2 { margin: 0; }
.section-link { font-weight: 600; white-space: nowrap; }
.home-about p { max-width: 820px; }
.intro-copy { max-width: 820px; }
.listing-header { padding-top: 32px; }
.visually-grouped { margin-top: 32px; }

/* ---------- Cards ---------- */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px;
}
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-card); overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-pop); border-color: #c9cee6; }
.card-link { display: flex; gap: 12px; padding: 14px; color: inherit; }
.card-link:hover { text-decoration: none; }
.card-icon { width: 56px; height: 56px; border-radius: 14px; flex-shrink: 0; transition: transform 0.15s ease; object-fit: contain; }
.card:hover .card-icon { transform: scale(1.05); }
@media (prefers-reduced-motion: reduce) {
  .card, .card-icon { transition: none; }
  .card:hover { transform: none; }
  .card:hover .card-icon { transform: none; }
}
.card-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.card-name { font-weight: 700; font-size: 0.98rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-cat { font-size: 0.8rem; color: var(--color-primary); font-weight: 600; }
.card-meta {
  font-size: 0.8rem; color: var(--color-muted); display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.35;
}

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.cat-card {
  border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface-alt);
}
.cat-card a { display: block; padding: 16px; color: inherit; }
.cat-card a:hover { text-decoration: none; background: #eceffa; }
.cat-card-name { display: block; font-weight: 700; margin-bottom: 4px; }
.cat-card-count { display: block; font-size: 0.82rem; color: var(--color-muted); }

.empty-state { color: var(--color-muted); background: var(--color-surface-alt); border: 1px dashed var(--color-border); border-radius: var(--radius-md); padding: 20px; }

/* ---------- Detail page ---------- */
.detail { padding: 32px 20px 64px; max-width: 900px; }
.detail-header { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 24px; }
.detail-icon { width: 84px; height: 84px; border-radius: 20px; flex-shrink: 0; object-fit: contain; }
.detail-header h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 4px; }
.detail-tagline { font-size: 1.05rem; margin-bottom: 6px; }
.detail-crumbs-meta { font-size: 0.9rem; color: var(--color-muted); margin: 0; }

.detail-facts { margin: 20px 0; }
.facts-table th, .facts-table td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--color-border); font-size: 0.92rem; }
.facts-table th { color: var(--color-muted); font-weight: 600; width: 42%; }
.facts-table .na { color: var(--color-muted); font-style: italic; }

.download-box {
  margin: 24px 0; padding: 20px; border-radius: var(--radius-md);
  border: 1px solid var(--color-border); background: var(--color-surface-alt);
}
.download-box-title { font-weight: 700; margin-bottom: 12px; }
.download-box-note { margin: 10px 0 0; font-size: 0.85rem; color: var(--color-muted); }
.download-box--pending .btn-disabled { width: 100%; justify-content: center; }
.download-box--ready .btn-download, .download-box--official .btn-download { width: 100%; justify-content: center; }
.download-box--official { border-color: var(--color-primary); }

.detail-section { margin: 36px 0; }
.feature-list { display: grid; gap: 8px; padding-left: 0; }
.feature-list li { list-style: none; padding-left: 26px; position: relative; color: var(--color-ink-soft); }
.feature-list li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--color-success);
}
.install-steps { padding-left: 22px; color: var(--color-ink-soft); }
.install-steps li { margin-bottom: 10px; }

.screenshot-strip { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 8px; }
.screenshot-strip li { flex: 0 0 auto; width: 160px; }
.screenshot-strip img { width: 100%; border-radius: var(--radius-md); border: 1px solid var(--color-border); }

.faq-list { display: grid; gap: 16px; }
.faq-item { padding: 16px 18px; background: var(--color-surface-alt); border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.faq-item h3 { font-size: 1rem; margin-bottom: 6px; }
.faq-item p { margin: 0; }

/* ---------- Legal pages ---------- */
.legal-page { padding: 32px 20px 64px; max-width: 820px; }
.legal-section { margin: 28px 0; }
.legal-section h2 { font-size: 1.2rem; }

/* ---------- Search page ---------- */
.search-page-form { display: flex; gap: 10px; max-width: 560px; margin: 18px 0 8px; }
.search-page-form input { flex: 1; padding: 12px 14px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); font-size: 1rem; }
.search-page-form button { padding: 0 22px; border-radius: var(--radius-sm); border: none; background: var(--color-primary); color: #fff; font-weight: 700; cursor: pointer; }
.search-status { color: var(--color-muted); font-size: 0.9rem; margin: 8px 0 18px; }
#search-load-more-wrap { text-align: center; margin: 24px 0; }

/* ---------- 404 ---------- */
.not-found { text-align: center; padding: 80px 20px; }
.not-found-links { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; margin-top: 20px; font-weight: 600; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-ink); color: #c7cbe0; margin-top: 64px; padding: 48px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer-brand p { color: #9aa0c0; max-width: 320px; margin-top: 12px; }
.site-footer .logo-text { color: #fff; }
.site-footer .logo-accent { color: #9db2ff; }
.footer-col h2 { color: #fff; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 12px; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: #c7cbe0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #2c3050; margin-top: 36px; padding-top: 18px; font-size: 0.82rem; color: #8489a8; }
.footer-bottom p { margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .header-search { order: 3; max-width: 100%; flex-basis: 100%; margin-top: 10px; }
  .header-row { flex-wrap: wrap; height: auto; padding: 12px 20px; }
  .menu-toggle { display: flex; order: 2; margin-left: auto; }
  .primary-nav {
    order: 4; width: 100%; max-height: 0; overflow: hidden; transition: max-height .22s ease;
  }
  .primary-nav.is-open { max-height: 400px; }
  .primary-nav ul { flex-direction: column; padding: 8px 0 4px; gap: 2px; }
  .primary-nav a { padding: 12px; }
  .detail-header { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .cat-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .card-icon { width: 46px; height: 46px; }
}

/* ---------- card CTA + A-Z bar ---------- */
.card-cta {
  margin-top: 6px; display: inline-block; font-size: 0.78rem; font-weight: 700;
  color: var(--color-accent);
}
.card-actions {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 0 14px 14px; border-top: 1px solid var(--color-border); margin-top: -2px; padding-top: 10px;
}
.card-actions .card-cta { margin-top: 0; }
.card-download {
  font-size: 0.76rem; font-weight: 700; padding: 5px 12px; border-radius: 999px;
  background: var(--color-primary); color: #fff; white-space: nowrap; flex-shrink: 0;
}
.card-download:hover { background: var(--color-primary-dark); text-decoration: none; }
.card-download--disabled {
  background: var(--color-surface-alt); color: var(--color-muted); cursor: default; pointer-events: none;
}
.az-bar { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 20px; }
.az-btn {
  min-width: 34px; height: 34px; padding: 0 8px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: var(--color-surface-alt);
  color: var(--color-ink-soft); font-weight: 700; cursor: pointer; font-size: 0.85rem;
}
.az-btn:hover { background: #eceffa; }
.az-btn.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ---------- version history ---------- */
.table-scroll { overflow-x: auto; }
.versions-table { min-width: 640px; font-size: 0.88rem; }
.versions-table th, .versions-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); }
.versions-table th { color: var(--color-muted); font-weight: 600; background: var(--color-surface-alt); }

/* ---------- lightbox ---------- */
.lightbox-trigger { cursor: zoom-in; }
.lightbox {
  position: fixed; inset: 0; z-index: 300; background: rgba(16, 18, 32, 0.92);
  display: flex; align-items: center; justify-content: center; padding: 40px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 90vw; max-height: 85vh; border-radius: var(--radius-md); }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; background: rgba(255,255,255,0.12); color: #fff; border: none;
  border-radius: 50%; width: 44px; height: 44px; font-size: 1.4rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.22); }
.lightbox-close { top: 20px; right: 20px; }
.lightbox-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 20px; top: 50%; transform: translateY(-50%); }

/* ---------- Tools ---------- */
.tool-card-icon {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  background: var(--color-surface-alt); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
}
.tool-card-icon svg { width: 24px; height: 24px; }
.card-grid--tools .card-link { align-items: flex-start; }
.tool-privacy-note {
  font-size: 0.85rem; color: var(--color-muted); background: var(--color-surface-alt);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 10px 14px; display: inline-block;
}
.tool-limit-note { font-size: 0.85rem; color: var(--color-muted); }
.tool-app-section { background: var(--color-surface-alt); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 20px; }

.tool-app { display: grid; gap: 14px; }
.tool-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.tool-row label { font-size: 0.85rem; font-weight: 600; color: var(--color-ink-soft); display: flex; flex-direction: column; gap: 4px; }
.tool-textarea, .tool-input, .tool-select {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  font-family: inherit; font-size: 0.95rem; background: var(--color-surface); color: var(--color-ink);
}
.tool-textarea { min-height: 180px; resize: vertical; font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.88rem; }
.tool-input { max-width: 220px; }
.tool-btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tool-stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; }
.tool-stat {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 12px; text-align: center;
}
.tool-stat-value { display: block; font-size: 1.4rem; font-weight: 800; color: var(--color-primary); }
.tool-stat-label { display: block; font-size: 0.75rem; color: var(--color-muted); margin-top: 2px; }

.tool-dropzone {
  border: 2px dashed var(--color-border); border-radius: var(--radius-md); padding: 30px 16px;
  text-align: center; color: var(--color-muted); cursor: pointer; background: var(--color-surface);
}
.tool-dropzone.is-dragover { border-color: var(--color-primary); background: #eef1ff; color: var(--color-primary); }
.tool-dropzone input[type="file"] { display: none; }

.tool-filelist { display: grid; gap: 8px; }
.tool-file-card {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 10px 14px; font-size: 0.88rem;
}
.tool-file-card .tool-file-meta { color: var(--color-muted); font-size: 0.8rem; }
.tool-file-remove { background: none; border: none; color: var(--color-accent); font-weight: 700; cursor: pointer; }

.tool-status { font-size: 0.88rem; font-weight: 600; padding: 10px 14px; border-radius: var(--radius-sm); }
.tool-status--processing { background: #eef1ff; color: var(--color-primary); }
.tool-status--done { background: #e6f7ef; color: var(--color-success); }
.tool-status--error { background: #fdeceb; color: #b0311b; }
.tool-status:empty { display: none; }

.tool-result-preview { max-width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--color-border); }
.tool-calc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.tool-copy-btn { font-size: 0.8rem; }