/* ============================================================
   COMPONENTS.CSS — Buttons, Tags, Lab Visualizers
   ============================================================ */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 2px;
  transition: opacity var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
  will-change: transform, opacity;
  position: relative;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-accent);
  color: #000;
  border: 1px solid var(--color-accent);
}

.btn-primary:hover {
  opacity: 0.88;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: rgba(245, 245, 245, 0.3);
  color: var(--color-text);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  padding: 0.875rem 0;
}

.btn-ghost:hover {
  color: var(--color-text);
}

/* Btn arrow icon */
.btn-arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-standard);
}
.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  background: rgba(245, 245, 245, 0.04);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-standard),
              background var(--duration-fast) var(--ease-standard);
}

.tag.accent {
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-color: rgba(0, 229, 255, 0.2);
}

/* ---------- Section Label / Eyebrow ---------- */
.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-eyebrow::after {
  content: '';
  height: 1px;
  width: 3rem;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ---------- Divider ---------- */
.divider {
  height: 1px;
  background: var(--color-border);
  margin-block: var(--space-md);
}

/* ============================================================
   LAB VISUALIZERS
   ============================================================ */

/* --- Event Loop Visualizer --- */
.event-loop-wrap {
  position: relative;
  height: 240px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

.loop-column {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.loop-col-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--color-text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.loop-stack {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.25rem;
  min-height: 140px;
  justify-content: flex-start;
}

.loop-task {
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 2px;
  padding: 0.3rem 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--color-accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  will-change: transform, opacity;
  transform-origin: center;
}

.loop-task.macro {
  background: rgba(245, 245, 245, 0.04);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.loop-task.call-stack {
  background: rgba(0, 229, 255, 0.15);
  border-color: rgba(0, 229, 255, 0.35);
  color: var(--color-accent);
}

.loop-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.loop-btn {
  padding: 0.3rem 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
}
.loop-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.loop-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--color-text-dim);
  margin-top: 0.5rem;
}

/* --- Hydration vs CSR Demo --- */
.hydration-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.hydration-panel {
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 1rem;
}

.hydration-panel-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hydration-timeline {
  position: relative;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.hydration-progress {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  width: 0%;
  transition: width var(--duration-slow) var(--ease-standard);
}

.hydration-phases {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-top: 0.75rem;
}

.hydration-phase {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  color: var(--color-text-dim);
}

.phase-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
  transition: background var(--duration-base) var(--ease-standard);
}

.phase-dot.done { background: var(--color-accent); }

.hydration-metric {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  margin-top: 0.75rem;
  color: var(--color-text-muted);
}

.hydration-metric span {
  color: var(--color-accent);
}

/* --- Render Optimization --- */
.render-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.render-panel {
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 1rem;
}

.render-panel-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.render-canvas-wrap {
  position: relative;
  height: 100px;
  background: rgba(245,245,245,0.02);
  border-radius: 2px;
  overflow: hidden;
}

.render-canvas-wrap canvas {
  width: 100%;
  height: 100%;
}

.render-stats {
  display: flex;
  justify-content: space-between;
  margin-top: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.58rem;
  color: var(--color-text-dim);
}

.render-stats .val { color: var(--color-accent); }

.lab-run-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.35rem 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
}
.lab-run-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   VISION BACKGROUND PARTICLES (canvas layer)
   ============================================================ */
#vision-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  z-index: 0;
}

.vision-content {
  position: relative;
  z-index: 1;
}

/* ============================================================
   CTA MICRO-INTERACTIONS
   ============================================================ */
.cta-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 2rem 2.5rem;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  width: clamp(260px, 30vw, 340px);
  background: rgba(245,245,245,0.02);
  cursor: pointer;
  transition: border-color var(--duration-base) var(--ease-standard),
              transform var(--duration-base) var(--ease-standard),
              background var(--duration-base) var(--ease-standard);
  will-change: transform;
  text-align: left;
}

.cta-card:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
  transform: translateY(-3px);
}

.cta-card:active {
  transform: translateY(-1px);
}

.cta-card-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.cta-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.cta-card-desc {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 28ch;
}

.cta-card-arrow {
  margin-top: 0.5rem;
  color: var(--color-accent);
  font-size: 1rem;
  transition: transform var(--duration-fast) var(--ease-standard);
}
.cta-card:hover .cta-card-arrow {
  transform: translateX(4px);
}

/* ============================================================
   MOBILE ADJUSTMENTS
   ============================================================ */
@media (max-width: 640px) {
  .event-loop-wrap {
    grid-template-columns: 1fr;
    height: auto;
  }

  .loop-stack {
    min-height: 80px;
  }

  .hydration-compare,
  .render-compare {
    grid-template-columns: 1fr;
  }

  .cta-options {
    flex-direction: column;
    align-items: center;
  }

  .cta-card {
    width: 100%;
    max-width: 340px;
  }

  .nav-links { display: none; }
}

/* ── IMPACT / CASE STUDIES ───────────────────────────────── */
.cs-root {
  --cs-bg:           #080c0e;
  --cs-glass:        rgba(255,255,255,0.05);
  --cs-border:       rgba(255,255,255,0.10);
  --cs-border-h:     rgba(0,255,136,0.38);
  --cs-card:         rgba(255,255,255,0.03);
  --cs-card-h:       rgba(0,255,136,0.04);
  --cs-accent:       #00ff88;
  --cs-accent-dim:   rgba(0,255,136,0.11);
  --cs-txt:          #eef2f0;
  --cs-txt-muted:    rgba(238,242,240,0.44);
  --cs-snap:         cubic-bezier(0.23,1,0.32,1);
  --cs-mono:         'Space Mono', 'Courier New', monospace;
  --cs-display:      'Syne', system-ui, sans-serif;

  box-sizing: border-box;
  font-family: var(--cs-display);
  -webkit-font-smoothing: antialiased;
  color: var(--cs-txt);
  padding: 100px 20px 120px;
}

.cs-root *, .cs-root *::before, .cs-root *::after {
  box-sizing: border-box;
  margin: 0; padding: 0;
}

.cs-root .cs-shell {
  max-width: 1300px;
  margin: 0 auto;
  background: var(--cs-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--cs-border);
  box-shadow:
    0 6px 80px rgba(0,0,0,0.55),
    inset 0 1px 0 rgba(255,255,255,0.05);
  padding: 64px 52px 72px;
}

.cs-root .cs-header {
  margin-bottom: 64px;
}

.cs-root .cs-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.cs-root .cs-eyebrow-line {
  display: block;
  width: 28px;
  height: 1px;
  background: var(--cs-accent);
  flex-shrink: 0;
}

.cs-root .cs-eyebrow-label {
  font-family: var(--cs-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cs-accent);
}

.cs-root .cs-title {
  font-family: var(--cs-display);
  font-size: clamp(34px, 5.2vw, 66px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--cs-txt);
}

.cs-root .cs-title em {
  font-style: normal;
  color: var(--cs-txt-muted);
}

.cs-root .cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2px;
}

.cs-root .cs-card {
  position: relative;
  overflow: hidden;
  background: var(--cs-card);
  border: 1px solid var(--cs-border);
  padding: 34px 30px 30px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  opacity: 0;
  transform: translateY(30px);
  transition:
    background 0.32s var(--cs-snap),
    border-color 0.32s var(--cs-snap),
    box-shadow 0.32s var(--cs-snap),
    transform 0.32s var(--cs-snap);
}

.cs-root .cs-card.cs-visible {
  opacity: 1;
  transform: translateY(0);
}

.cs-root .cs-card:hover {
  background: var(--cs-card-h);
  border-color: var(--cs-border-h);
  transform: translateY(-5px);
  box-shadow:
    0 24px 64px rgba(0,0,0,0.5),
    0 0 0 1px rgba(0,255,136,0.09),
    inset 0 1px 0 rgba(0,255,136,0.06);
}

.cs-root .cs-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cs-accent) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.32s var(--cs-snap);
}
.cs-root .cs-card:hover::before { opacity: 1; }

.cs-root .cs-meta {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.cs-root .cs-num {
  font-family: var(--cs-mono);
  font-size: 10px;
  color: var(--cs-accent);
  letter-spacing: 0.08em;
  opacity: 0.65;
  padding-top: 3px;
  flex-shrink: 0;
}

.cs-root .cs-name {
  font-family: var(--cs-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--cs-txt);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.cs-root .cs-domain {
  font-family: var(--cs-mono);
  font-size: 9.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cs-txt-muted);
  margin-top: 5px;
}

.cs-root .cs-rule {
  height: 1px;
  background: var(--cs-border);
}

.cs-root .cs-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
  flex: 1;
}

.cs-root .cs-block-label {
  font-family: var(--cs-mono);
  font-size: 8.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cs-accent);
  opacity: 0.72;
  margin-bottom: 6px;
}

.cs-root .cs-block-text {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.72;
  color: var(--cs-txt-muted);
}

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

.cs-root .cs-tag {
  font-family: var(--cs-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--cs-accent);
  background: var(--cs-accent-dim);
  border: 1px solid rgba(0,255,136,0.18);
  padding: 3px 9px;
  text-transform: lowercase;
  transition: background 0.2s, border-color 0.2s;
}

.cs-root .cs-card:hover .cs-tag {
  background: rgba(0,255,136,0.17);
  border-color: rgba(0,255,136,0.32);
}

.cs-root .cs-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--cs-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-accent);
  text-decoration: none;
  margin-top: auto;
  padding-top: 2px;
  width: fit-content;
  position: relative;
}

.cs-root .cs-cta::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--cs-accent);
  transition: width 0.28s var(--cs-snap);
}

.cs-root .cs-cta:hover::after { width: 100%; }

.cs-root .cs-arrow {
  display: inline-block;
  transition: transform 0.28s var(--cs-snap);
}

.cs-root .cs-cta:hover .cs-arrow {
  transform: translate(5px, -1px);
}

.cs-root .cs-ripple {
  position: absolute;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(0,255,136,0.13);
  transform: scale(0);
  pointer-events: none;
  animation: csRipple 0.52s var(--cs-snap) forwards;
}

@keyframes csRipple {
  to { transform: scale(30); opacity: 0; }
}

.cs-root .cs-card.cs-visible {
  transition:
    opacity  0.6s var(--cs-snap),
    transform 0.6s var(--cs-snap),
    background 0.32s var(--cs-snap),
    border-color 0.32s var(--cs-snap),
    box-shadow 0.32s var(--cs-snap);
}

.cs-root .cs-card { transition-delay: var(--cs-delay, 0ms); }

.cs-root .cs-header {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--cs-snap), transform 0.7s var(--cs-snap);
}

.cs-root .cs-header.cs-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .cs-root .cs-shell { padding: 36px 20px 48px; }
  .cs-root .cs-grid  { grid-template-columns: 1fr; }
}

/* ---------- Footer Styles ---------- */
.footer-main {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-lg);
}

.footer-container {
  max-width: 1100px;
  padding-inline: var(--gutter);
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
}

.footer-brand h2 {
  color: lightblue;
  margin-bottom: 10px;
}

.footer-brand p {
  line-height: 1.6;
  color: var(--color-text-muted);
}

.footer-socials {
  display: flex;
  gap: 14px;
  margin-top: 14px;
}

.footer-social-link {
  color: #b5b5b5;
  transition: color var(--duration-fast) var(--ease-standard);
}

.footer-social-link:hover {
  color: var(--color-accent);
}

.footer-copyright {
  text-align: center;
  padding-block: var(--space-md);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-lg);
}

.footer-copyright p {
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* ---------- Global Animations ---------- */
@keyframes floatBright {
  0% {
    transform: translateY(0) translateX(0) scale(0.8);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  50% {
    transform: translateY(-50vh) translateX(var(--drift)) scale(1.2);
  }
  100% {
    transform: translateY(-110vh) translateX(calc(var(--drift) * -1)) scale(0.9);
    opacity: 0;
  }
}