/* =========================================
   components.css — Reusable components
   ========================================= */

/* ── Binary rain background ── */
.binary-bg {
  position: fixed; inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: -1;
}
#binary-canvas {
  width: 100%; height: 100%;
  opacity: 0.04;
}

/* ── Tutorial overlay ── */
.tutorial-overlay {
  position: fixed; inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 32px;
  pointer-events: none;
}

.tutorial-card {
  pointer-events: all;
  max-width: 460px;
  width: 100%;
  padding: 28px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  box-shadow: 0 -4px 60px rgba(0,212,255,0.15), 0 40px 80px rgba(0,0,0,0.8);
  animation: slide-up 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes slide-up {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.tutorial-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.tutorial-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid var(--border-hi);
  padding: 2px 8px;
  border-radius: 999px;
}
.tutorial-step {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
}
.tutorial-title {
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--text-1);
  margin-bottom: 12px;
}
.tutorial-body {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: 14px;
}
.tutorial-formula {
  font-family: var(--font-mono);
  font-size: 1rem;
  text-align: center;
  color: var(--amber);
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin-bottom: 18px;
  letter-spacing: 0.06em;
}
.tutorial-nav {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.btn-tut {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-hi);
  background: transparent;
  color: var(--cyan);
  letter-spacing: 0.05em;
  transition: all 0.2s;
}
.btn-tut:hover { background: var(--cyan-dim); }
.btn-tut:disabled { opacity: 0.3; cursor: not-allowed; }
.btn-tut.primary {
  background: var(--cyan);
  color: var(--bg-0);
  border-color: var(--cyan);
  font-weight: 600;
}
.btn-tut.primary:hover { box-shadow: var(--cyan-glow); }

/* ── Hero animated grid ── */
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  animation: grid-shift 20s linear infinite;
}
@keyframes grid-shift {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 50px 50px, 50px 50px; }
}

/* ── Glow orbs (hero decoration) ── */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  animation: orb-float 8s ease-in-out infinite alternate;
}
.orb-1 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,212,255,0.15), transparent);
  top: 10%; left: 15%;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.12), transparent);
  top: 20%; right: 10%;
  animation-delay: -4s;
}
.orb-3 {
  width: 250px; height: 250px;
  background: radial-gradient(circle, rgba(59,130,246,0.1), transparent);
  bottom: 15%; left: 30%;
  animation-delay: -2s;
}
@keyframes orb-float {
  from { transform: translateY(0) scale(1); }
  to   { transform: translateY(-30px) scale(1.05); }
}

/* ── Exp page top bar ── */
.exp-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 48px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.exp-breadcrumb { color: var(--text-2); }
.exp-breadcrumb span { color: var(--cyan); }
.exp-topbar-right { display: flex; align-items: center; gap: 14px; }

/* ── FPS badge ── */
.fps-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--green);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.2);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ── Slider with label ── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.slider-row label { flex: 0 0 auto; min-width: 40px; }
.slider-row input[type="range"] { flex: 1; }
.slider-val {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  min-width: 36px;
  text-align: right;
}

/* ── Section divider ── */
.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 40px 0;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ── Tooltip ── */
[data-tip] { position: relative; }
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-2);
  border: 1px solid var(--border-hi);
  color: var(--text-1);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 50;
}
[data-tip]:hover::after { opacity: 1; }

/* ── "Coming soon" overlay on disabled cards ── */
.exp-card.disabled { opacity: 0.55; cursor: not-allowed; }
.exp-card.disabled:hover { transform: none; box-shadow: none; }