/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 18px;
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease-out), background 0.25s var(--ease-out), border-color 0.25s var(--ease-out), color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn .kbd { opacity: 0.7; margin-left: 4px; }

.btn-primary {
  background: var(--fg);
  color: var(--bg-0);
  box-shadow: 0 1px 0 rgba(255,255,255,0.2) inset, 0 8px 24px rgba(0,0,0,0.25);
}
.btn-primary:hover { background: var(--accent); color: var(--accent-ink); box-shadow: var(--glow); }

.btn-ghost {
  background: var(--surface);
  color: var(--fg-1);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface-strong); border-color: var(--border-strong); }

.btn-sm { height: 34px; padding: 0 14px; font-size: var(--fs-xs); }
.btn-lg { height: 52px; padding: 0 22px; font-size: var(--fs-base); }

/* ---------- Pills / Chips ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--fg-2);
}
.pill-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.pill-dot.live { animation: pulse 2.2s var(--ease-in-out) infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

/* ---------- Kbd ---------- */
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  border-radius: 6px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), transform 0.4s var(--ease-out);
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card-flat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-md); padding: var(--sp-4); }

/* ---------- Gradient text ---------- */
.aurora-text {
  background: linear-gradient(100deg, var(--aurora-1) 0%, var(--aurora-2) 35%, var(--aurora-3) 65%, var(--aurora-4) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- Aurora backgrounds ---------- */
.aurora-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  mix-blend-mode: screen;
  will-change: transform;
}
[data-theme="light"] .aurora-blob { opacity: 0.22; mix-blend-mode: multiply; }

/* ---------- Grid background ---------- */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
}

/* ---------- Glass surface ---------- */
.glass {
  background: var(--surface-glass);
  backdrop-filter: blur(24px) saturate(140%);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  border: 1px solid var(--border);
}

/* ---------- Tag ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-micro);
  color: var(--fg-2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
}

/* ---------- Marquee tracks ---------- */
.marquee {
  display: flex;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(90deg, transparent 0, black 8%, black 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, black 8%, black 92%, transparent 100%);
}
.marquee-track {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
  animation: marquee 40s linear infinite;
  padding-right: 14px;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee {
  to { transform: translateX(-100%); }
}

/* ---------- Section header ---------- */
.section-header { display: flex; flex-direction: column; gap: 14px; max-width: 760px; margin-bottom: clamp(36px, 5vw, 64px); }
.section-header .h2 { letter-spacing: -0.03em; }

/* ---------- Subtle dotted divider ---------- */
.dotted-rule { height: 1px; width: 100%; background-image: linear-gradient(90deg, var(--border-strong) 50%, transparent 0); background-size: 8px 1px; background-repeat: repeat-x; }