/* EEG/EMG Foundation Challenge 2026 — base reset + reusable atoms (eyebrow, kicker, pill, btn,
   badge, code block) shared across the landing. */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bs-bg);
  color: var(--bs-text);
  font-family: var(--bs-fontsans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--bs-link);
  transition: color 0.2s ease;
}

a:hover {
  color: var(--bs-link-hover);
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--bs-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link for keyboard / screen-reader users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  padding: 8px 14px;
  background: var(--bs-text);
  color: var(--bs-bg);
  border-radius: 4px;
  font-weight: 600;
  font-size: 13px;
  z-index: 1000;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 8px;
  color: var(--bs-bg);
}

.bs-root {
  font-family: var(--bs-fontsans);
  color: var(--bs-text);
  background: var(--bs-bg);
}

/* ---------- Atoms ---------- */

.bs-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  font-family: var(--bs-fontmono);
  font-size: 11px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--bs-muted);
  font-weight: 500;
}

.bs-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--bs-accent);
  box-shadow: 0 0 0 4px rgba(77, 134, 247, 0.18);
  animation: bs-pulse calc(2.4s / var(--bs-anim-speed)) ease-in-out infinite;
}

.bs-kicker {
  font-family: var(--bs-fontmono);
  font-size: 10px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--bs-faint);
  font-weight: 500;
}

.bs-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  padding: 6px 12px;
  border-radius: var(--bs-radius-pill);
  border: 1px solid var(--bs-card-border);
  background: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  font-weight: 600;
  color: var(--bs-muted);
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
  overflow-wrap: anywhere;
}

a.bs-pill:hover,
button.bs-pill:hover {
  background: rgba(255, 255, 255, 0.96);
  border-color: var(--bs-line-strong);
  color: var(--bs-link);
}

.bs-pill.solid {
  background: var(--bs-link);
  color: white;
  border-color: var(--bs-link);
}

a.bs-pill.solid:hover,
button.bs-pill.solid:hover {
  background: var(--bs-link-hover);
  color: white;
  border-color: var(--bs-link-hover);
}

.bs-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--bs-radius-sm);
  border: 1px solid transparent;
  background: transparent;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  text-decoration: none;
}

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

.bs-btn.primary:hover {
  background: var(--bs-link-hover);
  color: white;
}

.bs-btn.ghost {
  background: transparent;
  color: var(--bs-text);
  border-color: var(--bs-card-border);
}

.bs-btn.ghost:hover {
  border-color: var(--bs-line-strong);
  color: var(--bs-text);
}

.bs-btn.sm {
  padding: 8px 14px;
  font-size: 12px;
}

.bs-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.4px;
  background: var(--bs-accent-2);
  color: white;
  border-radius: 4px;
  font-family: var(--bs-fontmono);
}

/* ---------- Code block ---------- */

.bs-code {
  margin: 0;
  max-width: 100%;
  min-width: 0;
  background: var(--bs-code-bg);
  color: var(--bs-code-fg);
  border-radius: var(--bs-radius-card);
  overflow: hidden;
  font-family: var(--bs-fontmono);
  border: 1px solid var(--bs-code-line);
  box-shadow: var(--bs-shadow-code);
  font-size: 12.5px;
}

.bs-code-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--bs-code-line);
  font-size: 11px;
}

.bs-code-head .dots {
  display: flex;
  gap: 5px;
}

.bs-code-head .dots span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #2a3247;
}

.bs-code-head .bs-kicker {
  color: var(--bs-code-faint);
  flex: 1;
  min-width: 0;
  letter-spacing: 1.2px;
}

.bs-code-head .copy {
  font-size: 10px;
  color: var(--bs-code-faint);
  background: transparent;
  border: 1px solid transparent;
  padding: 3px 7px;
  border-radius: 4px;
  font-family: var(--bs-fontmono);
  letter-spacing: 0.6px;
  transition: all 0.15s ease;
}

.bs-code-head .copy:hover {
  color: var(--bs-code-fg);
  border-color: var(--bs-code-line);
}

.bs-code-head .copy.copied {
  color: var(--bs-code-str);
}

.bs-code pre {
  margin: 0;
  padding: 14px 0;
  line-height: 1.65;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.bs-code .line {
  display: grid;
  grid-template-columns: 36px 1fr;
  padding: 0 14px;
}

.bs-code .ln {
  color: #3d4661;
  user-select: none;
}

.bs-code code {
  color: var(--bs-code-fg);
  white-space: pre;
  font-family: inherit;
}

.bs-code .kw  { color: var(--bs-code-kw); }
.bs-code .str { color: var(--bs-code-str); }
.bs-code .cls { color: var(--bs-code-cls); }
.bs-code .op  { color: var(--bs-code-op); }
.bs-code .c1  { color: var(--bs-code-c1); font-style: italic; }
.bs-code .c2  { color: var(--bs-code-c2); font-style: italic; }

/* ---------- Animations ---------- */

@keyframes bs-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.55; transform: scale(0.7); }
}

@keyframes bs-fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes bs-eeg-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes bs-bar-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes bs-glow {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

.bs-fade-in > * {
  animation: bs-fade-up calc(0.6s / var(--bs-anim-speed)) cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.bs-fade-in > *:nth-child(1) { animation-delay: calc(0.05s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(2) { animation-delay: calc(0.15s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(3) { animation-delay: calc(0.25s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(4) { animation-delay: calc(0.35s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(5) { animation-delay: calc(0.45s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(6) { animation-delay: calc(0.55s / var(--bs-anim-speed)); }
.bs-fade-in > *:nth-child(7) { animation-delay: calc(0.65s / var(--bs-anim-speed)); }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 600px) {
  .bs-eyebrow {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 8px;
    line-height: 1.35;
    letter-spacing: 1px;
  }

  .bs-btn {
    min-height: 42px;
    padding: 10px 14px;
  }

  .bs-code {
    border-radius: 10px;
    font-size: 11px;
  }

  .bs-code-head {
    gap: 8px;
    padding: 9px 10px;
  }

  .bs-code-head .dots {
    display: none;
  }

  .bs-code pre {
    padding: 12px 0;
  }

  .bs-code .line {
    grid-template-columns: 28px max-content;
    padding: 0 10px;
  }
}