/* ═══════════════════════════════════════════════════════════════ */
/* Little Trader v0.02 — The Architecture of Edge                 */
/* ═══════════════════════════════════════════════════════════════ */

/* === Hero === */
.lt-hero {
  padding: 160px 0 100px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(34, 211, 238, 0.08) 0%, transparent 50%);
  border-bottom: 1px solid var(--color-border);
}

.lt-hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

.lt-hero__tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.lt-hero__title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--color-text);
}

.lt-hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 560px;
}

.lt-hero__visual .code-block {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
}

.code-block .comment {
  color: #6a737d;
  font-style: italic;
}

/* === Layers (narrative sections) === */
.lt-layer {
  padding: 120px 0;
  position: relative;
}

.lt-layer--alt {
  background: var(--color-surface);
}

.lt-layer__header {
  margin-bottom: 64px;
  position: relative;
}

.lt-layer__number {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 5rem;
  font-weight: 800;
  color: rgba(99, 102, 241, 0.08);
  line-height: 1;
  margin-bottom: -20px;
  letter-spacing: -0.05em;
}

.lt-layer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.lt-layer__grid--reverse {
  direction: rtl;
}
.lt-layer__grid--reverse > * {
  direction: ltr;
}

.lt-layer__text p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.lt-layer__code .code-block {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
}

/* === Playbooks (strategy levels) === */
.lt-playbooks {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.lt-playbook {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 36px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.lt-playbook::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  opacity: 0.4;
  transition: opacity 0.3s ease;
}

.lt-playbook:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.lt-playbook:hover::before {
  opacity: 1;
}

.lt-playbook--frontier {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(34, 211, 238, 0.04));
  border-color: rgba(99, 102, 241, 0.3);
}

.lt-playbook__level {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.lt-playbook h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.lt-playbook p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* === Architecture Flow === */
.lt-arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 40px 0;
}

.lt-arch-node {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  min-width: 120px;
  transition: all 0.3s ease;
}

.lt-arch-node:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
}

.lt-arch-node__icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.lt-arch-node h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.lt-arch-node p {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.lt-arch-arrow {
  font-size: 1.5rem;
  color: var(--color-accent);
  font-weight: 300;
  opacity: 0.5;
}

/* === Docs Section === */
.lt-docs-section {
  padding: 100px 0 40px;
  text-align: center;
}

.lt-docs-section .lt-layer__header {
  margin-bottom: 32px;
}

.lt-docs-section__sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: -24px auto 32px;
  line-height: 1.7;
}

.lt-docs-section .btn {
  margin-bottom: 24px;
}

/* === Docs Viewer (carried from v0.01) === */
.trader-container {
  display: flex;
  height: 70vh;
  min-height: 500px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trader-sidebar {
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  flex-shrink: 0;
}

.trader-sidebar__header {
  padding: 24px 16px;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 10;
}

.trader-sidebar__header h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.trader-sidebar__categories { padding: 8px 0; }

.trader-category { margin-bottom: 8px; }

.trader-category__header {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
  text-align: left;
  font-family: var(--font);
}

.trader-category__header:hover { background: var(--color-surface-hover); }

.trader-category__arrow {
  display: inline-flex;
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  transition: transform 0.2s ease;
  font-size: 12px;
}

.trader-category__arrow.expanded { transform: rotate(90deg); }

.trader-category__items {
  display: flex;
  flex-direction: column;
}

.trader-item {
  padding: 10px 32px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font);
}

.trader-item:hover {
  color: var(--color-accent);
  background: rgba(34, 211, 238, 0.05);
  padding-left: 36px;
}

.trader-item.active {
  color: var(--color-accent);
  background: rgba(34, 211, 238, 0.1);
  font-weight: 500;
}

.trader-docs {
  flex: 1;
  overflow-y: auto;
  background: var(--color-bg);
}

.trader-docs__content {
  padding: 40px 60px;
  max-width: 900px;
  margin: 0 auto;
}

.trader-docs__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
}

.trader-docs__empty-state {
  text-align: center;
  color: var(--color-text-muted);
}

.trader-docs__empty-state p { font-size: 18px; }

.trader-docs__loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
}

.trader-docs__loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* === Markdown Styles === */
.trader-markdown { color: var(--color-text); line-height: 1.8; }
.trader-markdown h1, .trader-markdown h2, .trader-markdown h3,
.trader-markdown h4, .trader-markdown h5, .trader-markdown h6 {
  color: var(--color-text); margin: 32px 0 16px 0; font-weight: 600; line-height: 1.3;
}
.trader-markdown h1 { font-size: 32px; border-bottom: 2px solid var(--color-border); padding-bottom: 16px; }
.trader-markdown h2 { font-size: 24px; }
.trader-markdown h3 { font-size: 20px; }
.trader-markdown p { margin: 16px 0; color: var(--color-text-muted); }
.trader-markdown a { color: var(--color-accent); border-bottom: 1px solid rgba(34, 211, 238, 0.3); }
.trader-markdown a:hover { color: var(--color-primary-light); }
.trader-markdown ul, .trader-markdown ol { margin: 16px 0; padding-left: 32px; }
.trader-markdown li { margin: 8px 0; color: var(--color-text-muted); }
.trader-markdown code {
  background: var(--color-surface); padding: 2px 6px; border-radius: 4px;
  font-family: 'JetBrains Mono', monospace; font-size: 14px; color: var(--color-accent);
}
.trader-markdown pre {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 8px; padding: 16px; overflow-x: auto; margin: 20px 0;
}
.trader-markdown pre code { background: none; padding: 0; color: var(--color-text); font-size: 13px; line-height: 1.5; }
.trader-markdown blockquote { border-left: 4px solid var(--color-accent); padding-left: 16px; margin: 20px 0; color: var(--color-text-muted); font-style: italic; }
.trader-markdown table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.trader-markdown table th { background: var(--color-surface); color: var(--color-text); padding: 12px; text-align: left; border: 1px solid var(--color-border); font-weight: 600; }
.trader-markdown table td { padding: 12px; border: 1px solid var(--color-border); color: var(--color-text-muted); }
.trader-markdown table tr:hover { background: rgba(34, 211, 238, 0.05); }
.trader-markdown hr { border: none; height: 1px; background: var(--color-border); margin: 32px 0; }

/* === Nav active === */
.nav-link--active { color: var(--color-accent) !important; font-weight: 500; }

/* === Responsive === */
@media (max-width: 900px) {
  .lt-hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .lt-layer__grid, .lt-layer__grid--reverse { grid-template-columns: 1fr; direction: ltr; }
  .lt-layer__grid--reverse > * { direction: ltr; }
  .lt-arch-flow { flex-direction: column; }
  .lt-arch-arrow { transform: rotate(90deg); }
  .trader-container { flex-direction: column; height: auto; }
  .trader-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--color-border); max-height: 300px; }
}

@media (max-width: 640px) {
  .lt-hero { padding: 120px 0 60px; }
  .lt-hero__title { font-size: 1.75rem; }
  .lt-layer { padding: 80px 0; }
  .lt-layer__number { font-size: 3rem; }
  .trader-docs__content { padding: 24px; }
}