/* ==========================================================================
   bit.io — components.css
   Nav, footer, terminal, package cards, language bar, search
   ========================================================================== */

/* -- Top nav -- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-brand img {
  width: 30px;
  height: 30px;
}

.nav-brand span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.15s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--grad-orange), var(--grad-purple));
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  padding: 8px;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
  display: block;
}

@media (max-width: 760px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 24px 20px;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 10px 0;
    width: 100%;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-cta .btn-ghost {
    display: none;
  }
}

/* -- Footer -- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 96px;
  padding: 48px 0 32px;
  background: var(--bg-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-brand img {
  width: 24px;
  height: 24px;
}

.footer-brand span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
}

.footer p.desc {
  color: var(--ink-mute);
  font-size: 13.5px;
  max-width: 32ch;
}

.footer h4 {
  font-family: var(--font-body);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  margin-bottom: 14px;
  font-weight: 600;
}

.footer ul li {
  margin-bottom: 9px;
}

.footer ul li a {
  font-size: 14px;
  color: var(--ink-soft);
}

.footer ul li a:hover {
  color: var(--ink);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}

@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* -- Terminal (hero signature) -- */
.terminal {
  background: var(--bg-panel);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  border: 1px solid #22222a;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  background: var(--bg-panel-soft);
  border-bottom: 1px solid #24242c;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.r { background: #ff5f56; }
.terminal-dot.y { background: #ffbd2e; }
.terminal-dot.g { background: #27c93f; }

.terminal-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-on-dark-soft);
}

.terminal-body {
  padding: 22px 22px 26px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.85;
  min-height: 220px;
}

.terminal-line {
  color: var(--ink-on-dark-soft);
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-line .prompt {
  color: #7dd3a0;
}

.terminal-line .cmd {
  color: var(--ink-on-dark);
}

.terminal-line .ok { color: #7dd3a0; }
.terminal-line .accent { color: #c893ff; }
.terminal-line .muted { color: #5f636f; }

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--ink-on-dark);
  vertical-align: middle;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* -- Search -- */
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  padding: 12px 16px;
  background: var(--bg);
}

.search-box:focus-within {
  border-color: var(--ink);
}

.search-box svg {
  width: 17px;
  height: 17px;
  color: var(--ink-mute);
  flex: none;
}

.search-box input {
  border: none;
  outline: none;
  flex: 1;
  font-size: 14.5px;
  font-family: var(--font-body);
  background: transparent;
  color: var(--ink);
}

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

.filter-chip {
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 7px 13px;
  border-radius: 100px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--ink-soft);
  transition: all 0.15s ease;
}

.filter-chip:hover {
  border-color: var(--ink);
}

.filter-chip.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

/* -- Package grid / cards -- */
.pkg-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 940px) {
  .pkg-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .pkg-grid { grid-template-columns: 1fr; }
}

.pkg-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 20px;
  background: var(--bg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 180px;
}

.pkg-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  border-color: var(--border-strong);
}

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

.pkg-card-title {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  word-break: break-word;
}

.pkg-card-desc {
  font-size: 13.5px;
  color: var(--ink-soft);
  flex: 1;
}

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

.pkg-card-tags:empty {
  display: none;
}

.tag-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid var(--border-strong);
  color: var(--ink-mute);
}

.pkg-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.pkg-card-owner {
  font-size: 12px;
  color: var(--ink-mute);
  font-family: var(--font-mono);
}

/* -- Language bar (GitHub-style) -- */
.lang-bar {
  display: flex;
  width: 100%;
  height: 8px;
  border-radius: 100px;
  overflow: hidden;
  background: var(--bg-soft);
}

.lang-bar span {
  height: 100%;
  transition: width 0.4s ease;
}

.lang-bar.lg {
  height: 10px;
}

.lang-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.lang-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: var(--font-mono);
}

.lang-legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}

.lang-loading,
.lang-empty {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}

/* -- Section helpers -- */
.section {
  padding: 88px 0;
}

.section-head {
  margin-bottom: 40px;
  max-width: 640px;
}

.section-head h2 {
  font-size: 32px;
  margin-top: 12px;
}

.section-head p {
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.section-tight {
  padding: 56px 0;
}