/* ==========================================================================
   Software Hub — styles
   ========================================================================== */

:root {
  --bg: #0f1115;
  --bg-elev: #161922;
  --bg-elev-2: #1d2230;
  --border: #262b3a;
  --border-strong: #343a4d;
  --text: #e8ecf3;
  --text-muted: #9aa3b2;
  --accent: #6aa6ff;
  --accent-strong: #4f8cff;
  --accent-soft: rgba(106, 166, 255, 0.12);
  --warning-bg: #2a2410;
  --warning-border: #5c4a14;
  --warning-text: #ffd479;
  --tag-bg: #232a3a;
  --tag-text: #cbd5e1;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.25), 0 8px 24px rgba(0, 0, 0, 0.25);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --transition: 160ms ease;
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0f2f8;
  --border: #e3e6ee;
  --border-strong: #cfd4e1;
  --text: #1a1f2b;
  --text-muted: #5a6271;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --warning-bg: #fff4d6;
  --warning-border: #f0c66b;
  --warning-text: #6b4a00;
  --tag-bg: #eef1f7;
  --tag-text: #2b3242;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 20px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.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;
}

/* Skip-to-content: видимий лише при фокусі з клавіатури. */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 0 0 8px 0;
  font-weight: 600;
  transform: translateY(-120%);
  transition: transform var(--transition);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

#main:focus {
  outline: none;
}

/* Header
   -------------------------------------------------------------------------- */
.site-header {
  background: linear-gradient(180deg, var(--bg-elev) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  border: 1px solid var(--border);
  flex: 0 0 auto;
}

.brand-text h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-text p {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 14px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  background: var(--bg-elev-2);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
  font: inherit;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

@media (hover: hover) {
  .theme-toggle:hover {
    background: var(--accent-soft);
    border-color: var(--border-strong);
  }
}

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

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle .theme-icon {
  font-size: 16px;
  line-height: 1;
}

/* Main
   -------------------------------------------------------------------------- */
.main-content {
  flex: 1;
  padding: 28px 20px 48px;
}

/* Warning card
   -------------------------------------------------------------------------- */
.warning-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--radius);
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  margin-bottom: 24px;
}

.warning-icon {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--warning-border);
  color: var(--warning-bg);
  font-weight: 800;
}

.warning-text {
  font-size: 14.5px;
}

.warning-text strong {
  color: var(--warning-text);
}

/* Controls
   -------------------------------------------------------------------------- */
.controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 22px;
}

.search-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.search-input {
  flex: 1 1 320px;
  min-width: 0;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-input:focus-visible {
  outline: none;
}

.results-count {
  color: var(--text-muted);
  font-size: 13.5px;
  white-space: nowrap;
}

.filters-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding: 4px 0;
}

.filter-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-field-label {
  color: var(--text-muted);
  font-size: 13px;
  white-space: nowrap;
}

.select {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

@media (hover: hover) {
  .select:hover {
    border-color: var(--border-strong);
  }
}

.select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.os-filter {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  padding: 0;
  margin: 0;
  border: 0;
}

.os-filter > legend {
  display: inline;
  padding: 0;
  margin-right: 4px;
}

.os-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: border-color var(--transition), background var(--transition);
}

@media (hover: hover) {
  .os-check:hover {
    border-color: var(--border-strong);
  }
}

.os-check:has(input:checked) {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.os-check input {
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}

.os-check:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn--ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-muted);
  font-size: 13px;
  padding: 6px 12px;
  margin-left: auto;
}

@media (hover: hover) {
  .btn--ghost:hover {
    color: var(--text);
    border-color: var(--text-muted);
    background: var(--accent-soft);
  }
}

.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-btn {
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition),
    transform var(--transition);
}

@media (hover: hover) {
  .cat-btn:hover {
    border-color: var(--border-strong);
    background: var(--bg-elev-2);
  }
}

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

.cat-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

[data-theme="light"] .cat-btn.is-active {
  color: #fff;
}

/* Cards
   -------------------------------------------------------------------------- */
.cards-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

@media (hover: hover) {
  .card:hover {
    transform: translateY(-2px);
    border-color: var(--border-strong);
  }
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.card-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  word-break: break-word;
}

.card-category {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  white-space: nowrap;
  flex: 0 0 auto;
}

.card-description {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--tag-bg);
  color: var(--tag-text);
  font: inherit;
  font-size: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

@media (hover: hover) {
  .tag:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
  }
}

.tag:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tag[data-kind="os-windows"],
.tag[data-kind="os-linux"],
.tag[data-kind="os-macos"],
.tag[data-kind="os-android"],
.tag[data-kind="open-source"],
.tag[data-kind="free"] {
  border-color: var(--border-strong);
}

.tag .tag-icon {
  display: inline-block;
  margin-right: 4px;
  font-size: 11px;
  line-height: 1;
  transform: translateY(-0.5px);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  font: inherit;
  font-size: 13.5px;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition),
    color var(--transition);
}

@media (hover: hover) {
  .btn:hover {
    border-color: var(--border-strong);
    background: var(--accent-soft);
  }
}

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

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

@media (hover: hover) {
  .btn--primary:hover {
    background: var(--accent-strong);
    border-color: var(--accent-strong);
    color: #fff;
  }
}

/* Search match highlight
   -------------------------------------------------------------------------- */
mark {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0 2px;
  border-radius: 3px;
  font-weight: 600;
}

[data-theme="light"] mark {
  color: var(--accent-strong);
}

/* States
   -------------------------------------------------------------------------- */
.empty-state,
.error-state {
  text-align: center;
  margin: 40px 0;
  color: var(--text-muted);
  font-size: 15px;
}

.error-state {
  color: #ff8b8b;
}

.noscript-warning {
  margin-top: 24px;
}

.noscript-warning a {
  color: var(--accent);
}

/* Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 20px 0;
  margin-top: auto;
}

.site-footer p {
  margin: 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-stats {
  color: var(--text-muted);
  opacity: 0.85;
}

/* Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .header-inner {
    padding: 18px 20px;
    flex-wrap: wrap;
  }

  .brand-text h1 {
    font-size: 19px;
  }

  .brand-text p {
    font-size: 13px;
  }

  .theme-toggle .theme-label {
    display: none;
  }

  .main-content {
    padding-top: 22px;
  }

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

  .filters-row {
    gap: 10px 14px;
  }

  .btn--ghost {
    margin-left: 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}