/* ── Hero ── */
.hero {
  position: relative;
  z-index: 1;
  padding: 8rem 0 5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 32rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-audience {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.hero-audience li {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* Hero visual — drawing panel mockup */
.hero-visual {
  perspective: 1200px;
}

.drawing-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(45, 212, 191, 0.08);
  transform: rotateY(-4deg) rotateX(2deg);
  transition: transform 0.6s ease;
}

.drawing-panel:hover {
  transform: rotateY(0deg) rotateX(0deg);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.panel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.5;
}

.panel-dot:first-child { background: #ef4444; opacity: 0.7; }
.panel-dot:nth-child(2) { background: #eab308; opacity: 0.7; }
.panel-dot:nth-child(3) { background: #22c55e; opacity: 0.7; }

.panel-title {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: monospace;
}

.panel-body {
  position: relative;
  height: 320px;
  padding: 1.5rem;
  background:
    linear-gradient(rgba(45, 212, 191, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

.drawing-lines {
  position: absolute;
  inset: 1.5rem;
}

.line {
  position: absolute;
  background: rgba(148, 163, 184, 0.2);
}

.line-h { top: 40%; left: 10%; width: 60%; height: 1px; }
.line-v { top: 20%; left: 45%; width: 1px; height: 50%; }
.line-d {
  top: 55%;
  left: 20%;
  width: 40%;
  height: 1px;
  transform: rotate(-25deg);
}

.detail-box {
  position: absolute;
  top: 25%;
  right: 15%;
  width: 80px;
  height: 60px;
  border: 1px dashed rgba(148, 163, 184, 0.3);
}

.callout {
  position: absolute;
  bottom: 30%;
  left: 15%;
  font-size: 0.65rem;
  font-family: monospace;
  color: var(--text-muted);
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.bbox {
  position: absolute;
  border: 2px solid var(--accent-cyan);
  border-radius: 2px;
  animation: pulse-bbox 3s ease-in-out infinite;
}

.bbox-1 {
  top: 22%;
  right: 12%;
  width: 90px;
  height: 70px;
}

.bbox-2 {
  top: 58%;
  left: 18%;
  width: 120px;
  height: 40px;
  animation-delay: 1.5s;
}

@keyframes pulse-bbox {
  0%, 100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(45, 212, 191, 0); }
}

.chat-bubble {
  position: absolute;
  bottom: 4.5rem;
  left: 1rem;
  max-width: 200px;
  padding: 0.65rem 0.9rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px 12px 12px 4px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  animation: float-in 0.8s ease 0.5s both;
}

.answer-bubble {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  max-width: 220px;
  padding: 0.65rem 0.9rem;
  background: var(--accent-cyan-dim);
  border: 1px solid var(--border-strong);
  border-radius: 12px 12px 4px 12px;
  font-size: 0.78rem;
  animation: float-in 0.8s ease 1s both;
}

.answer-bubble strong { color: var(--accent-cyan); }

.citation-tag {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.65rem;
  color: var(--accent-cyan);
  opacity: 0.8;
}

@keyframes float-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Problem / Solution ── */
.problem-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.problem-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.problem-card p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.solution-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--accent-cyan);
}

.solution-card h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
}

.solution-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ── Steps ── */
.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.step:first-child { padding-top: 0; }
.step:last-child { border-bottom: none; }

.step-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--accent-cyan);
  opacity: 0.35;
  line-height: 1;
}

.step-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.step-content p {
  color: var(--text-secondary);
  max-width: 36rem;
}

/* ── Features ── */
.features {
  background: linear-gradient(180deg, transparent, rgba(26, 36, 51, 0.5) 30%, transparent);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.feature-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-amber-dim);
  border-radius: 10px;
  color: var(--accent-amber);
  margin-bottom: 1.25rem;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── CTA ── */
.cta-inner {
  max-width: 560px;
  margin-inline: auto;
  text-align: center;
}

.cta-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.cta-inner > p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}