/* ════════════════════════════════════════════════════════════════
   ArbEdgeBot — Page styles
   Extends index.css
   ════════════════════════════════════════════════════════════════ */

/* Override product mark for ArbEdgeBot */
.product-id-mark-arb {
  background: var(--accent);
  color: var(--accent-ink);
}

/* ═══════════════════════════════════════════
   HERO
═══════════════════════════════════════════ */

.arb-hero {
  padding: 64px 0 64px;
  position: relative;
}

.arb-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: start;
  margin-top: 40px;
}

.arb-title {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 700;
  margin-bottom: 24px;
}

.arb-title .hero-line {
  display: block;
}

.arb-title .hero-line-accent {
  color: var(--accent);
}

.arb-title .hero-line-italic {
  font-style: italic;
  font-weight: 600;
  color: var(--ink-2);
}

.arb-lede {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 28px;
  max-width: 540px;
}

.arb-hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.arb-exchange-row {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.exchange-row-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.exchange-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exchange-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink);
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  padding: 5px 12px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* ─── Signal feed aside ─── */
.arb-signal-feed {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .arb-signal-feed {
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
}

.feed-chrome {
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.feed-chrome .chrome-title {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  text-align: center;
  letter-spacing: 0.02em;
}

.feed-body {
  padding: 8px 0;
}

.feed-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  transition: background var(--transition);
}

.feed-row:last-child {
  border-bottom: none;
}

.feed-row:hover {
  background: var(--bg-elev-2);
}

.feed-urgent {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding-left: 15px;
}

.feed-urgent:hover {
  background: var(--accent-soft);
}

.feed-row-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.feed-symbol {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.feed-type {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.feed-row-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.feed-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.feed-num-up {
  color: var(--accent);
}

.feed-score {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--bg-elev-2);
  padding: 2px 8px;
  border-radius: 3px;
  min-width: 42px;
  text-align: center;
}

.feed-tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  border-radius: 3px;
  min-width: 64px;
  text-align: center;
}

.tag-urgent {
  background: var(--accent);
  color: var(--accent-ink);
}

.tag-open {
  background: var(--info-soft);
  color: var(--info);
}

.tag-qualify {
  background: var(--bg-elev-3);
  color: var(--ink-3);
}

.feed-row-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  padding: 10px 18px;
  letter-spacing: 0.02em;
}

.feed-cursor {
  display: inline-block;
  width: 6px;
  height: 11px;
  background: var(--accent);
  vertical-align: middle;
  animation: cursor-blink 1.1s step-end infinite;
}

.feed-footer {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.ff-stat {
  padding: 14px 18px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.ff-stat:last-child {
  border-right: none;
}

.ff-num {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1;
}

.ff-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ═══════════════════════════════════════════
   ENGINES SECTION
═══════════════════════════════════════════ */

.section-engines {
  background: var(--bg);
}

.engine-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.engine {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background var(--transition);
}

.engine:hover {
  background: var(--bg-elev-2);
}

.engine-featured {
  border-color: var(--line-accent);
  position: relative;
}

.engine-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.engine-marker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.engine-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.engine-glyph {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1;
  color: var(--accent);
  font-weight: 400;
}

.engine-glyph-arb {
  color: var(--accent);
}

.engine-glyph-sniper {
  color: var(--warn);
}

.engine-glyph-farm {
  color: var(--info);
}

.engine-rank {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.engine-name {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 14px;
}

.engine-pitch {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 24px;
  flex: 1;
}

.engine-specs {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  gap: 12px;
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.spec-row dd {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

.spec-row-config dd code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 700;
}

/* Combine callout */
.engine-combine {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 20px;
  padding: 24px 28px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  align-items: center;
}

.combine-marker {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  line-height: 1;
}

.combine-body h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 6px;
}

.combine-body p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
}

.combine-body code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 700;
}

/* ═══════════════════════════════════════════
   SIGNALS SECTION
═══════════════════════════════════════════ */

.section-signals {
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.signals-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.signals-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.signals-card-head {
  background: var(--bg-inset);
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.signals-card-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.signals-card-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.signals-table {
  width: 100%;
  border-collapse: collapse;
}

.signals-table thead th {
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  border-bottom: 1px solid var(--line);
  background: var(--bg-inset);
}

.signals-table thead th.num {
  text-align: right;
}

.signals-table tbody td {
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  vertical-align: middle;
}

.signals-table tbody tr:last-child td {
  border-bottom: none;
}

.signals-table tbody tr:hover {
  background: var(--bg-elev);
}

.signals-table .sym {
  font-weight: 700;
  color: var(--ink);
}

.signals-table .muted {
  color: var(--ink-3);
  text-transform: uppercase;
  font-size: 10.5px;
  letter-spacing: 0.04em;
}

.signals-table .num {
  text-align: right;
  font-weight: 600;
  color: var(--ink-2);
}

.signals-table .gain {
  color: var(--accent);
  font-weight: 700;
}

.signals-table .loss {
  color: var(--danger);
  font-weight: 600;
}

.status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 3px;
  min-width: 70px;
  text-align: center;
}

.status-urgent {
  background: var(--accent);
  color: var(--accent-ink);
}

.status-open {
  background: var(--info-soft);
  color: var(--info);
}

.status-qualify {
  background: var(--bg-elev-3);
  color: var(--ink-3);
}

/* ═══════════════════════════════════════════
   FEATURES BENTO
═══════════════════════════════════════════ */

.section-features-arb {
  background: var(--bg);
}

.features-bento-arb {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.bento {
  background: var(--bg);
  padding: 28px 26px;
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background var(--transition);
}

.bento:hover {
  background: var(--bg-elev);
}

.bento-lead {
  grid-column: span 4;
  grid-row: span 1;
}

.bento-wide {
  grid-column: span 4;
}

.bento-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.bento-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}

.bento-lead .bento-title,
.bento-wide .bento-title {
  font-size: 26px;
}

.bento-body {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-top: auto;
}

.bento-body code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 3px;
}

.bento-code {
  margin-top: 10px;
  padding: 14px 16px;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.bento-code pre {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--ink-2);
  white-space: pre;
  overflow-x: auto;
}

/* ═══════════════════════════════════════════
   RISK / PROTECTION
═══════════════════════════════════════════ */

.section-protection {
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.protection-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.protect-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.protect-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.protect-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.protect-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 8px;
}

.protect-body {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 16px;
  flex: 1;
}

.protect-data {
  background: var(--bg-inset);
  border-radius: var(--radius);
  padding: 4px 16px;
}

.pd-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  gap: 12px;
}

.pd-row:last-child {
  border-bottom: none;
}

.pd-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

.pd-val {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

.pd-val code {
  background: var(--bg-elev);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--accent);
  font-size: 11px;
}

.pd-warn {
  color: var(--warn);
}

.pd-accent {
  color: var(--accent);
}

/* ═══════════════════════════════════════════
   PAPER TRADING
═══════════════════════════════════════════ */

.section-paper-arb {
  background: var(--bg);
}

.paper-arb-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.paper-report {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.report-head {
  background: var(--bg-inset);
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.report-path {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.report-filename {
  color: var(--accent);
  font-weight: 700;
}

.report-tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--warn);
  background: var(--warn-soft);
  padding: 3px 9px;
  border-radius: 3px;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.report-body {
  padding: 18px 22px;
}

.rb-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  gap: 12px;
}

.rb-divider {
  height: 1px;
  background: var(--line);
  margin: 8px 0;
}

.rb-key {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

.rb-val {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

.rb-gain {
  color: var(--accent);
  font-weight: 700;
}

.rb-loss {
  color: var(--danger);
  font-weight: 600;
}

.rb-paper {
  color: var(--warn);
  font-weight: 700;
}

.rb-mode {
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* Paper path */
.paper-path-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.path-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 20px 22px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
}

.path-step-best {
  background: var(--accent-soft);
  border-color: var(--line-accent);
}

.path-step-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent);
}

.path-step-body h4 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 6px;
  color: var(--ink);
}

.path-step-body p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
}

.path-step-body code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--bg-inset);
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 600;
}

.path-step-best .path-step-body code {
  background: var(--bg);
}

/* ═══════════════════════════════════════════
   ARCHITECTURE / BRIDGE
═══════════════════════════════════════════ */

.section-bridge {
  background: var(--bg-elev);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.arch-flow {
  display: grid;
  grid-template-columns: 1fr 40px 1fr 40px 1fr;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 32px;
}

.arch-col {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
}

.arch-col-mid {
  background: var(--accent-soft);
  border-color: var(--line-accent);
}

.arch-col-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.arch-col-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.arch-col-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.arch-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.arch-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  gap: 8px;
}

.arch-list li:last-child {
  border-bottom: none;
}

.arch-list-tight li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.arch-list-code li {
  border-bottom: none;
  padding: 4px 0;
}

.arch-list-code code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background: var(--bg-elev);
  padding: 4px 10px;
  border-radius: 3px;
  font-weight: 700;
  width: 100%;
  display: block;
  word-break: break-all;
}

.arch-name {
  font-weight: 600;
  color: var(--ink);
}

.arch-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  text-align: right;
}

.arch-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--ink-3);
}

.arch-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.arch-stat {
  background: var(--bg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.arch-stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--accent);
  line-height: 1;
}

.arch-stat-num small {
  font-size: 20px;
  font-weight: 500;
  color: var(--ink-3);
}

.arch-stat-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 4px;
}

.arch-stat-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════════
   PRICING (ArbEdgeBot-specific)
═══════════════════════════════════════════ */

.section-pricing-arb {
  background: var(--bg);
}

.arb-tier-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.arb-tier {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background var(--transition);
}

.arb-tier:hover {
  background: var(--bg-elev-2);
}

.arb-tier-featured {
  border-color: var(--line-accent);
}

.arb-tier-featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.tier-marker-basic .tier-num,
.tier-marker-basic .tier-rank {
  color: var(--info);
}

.tier-marker-basic .tier-rank {
  border-left-color: rgba(106, 183, 255, 0.4);
}

[data-theme="light"] .tier-marker-basic .tier-rank {
  border-left-color: rgba(42, 110, 193, 0.4);
}

.arb-tier-name {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 10px;
  margin-top: 12px;
}

.arb-tier-pitch {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 20px;
  min-height: 60px;
}

.arb-tier-price {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 6px;
  padding: 18px 0;
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.arb-price-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--ink);
}

.arb-price-suffix {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

.arb-price-meta {
  flex-basis: 100%;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin-top: 6px;
  line-height: 1.5;
}

.arb-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 24px;
  flex: 1;
}

.arb-features li {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 10px;
  padding: 8px 0;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.arb-features li:last-child {
  border-bottom: none;
}

.arb-features li::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-top: 3px;
  flex-shrink: 0;
}

.arb-features .feat-on::before {
  background: var(--accent-soft);
  background-image: radial-gradient(circle, var(--accent) 30%, transparent 35%);
}

.arb-features .feat-off::before {
  background: var(--bg-elev-3);
  background-image: linear-gradient(135deg, transparent 45%, var(--ink-4) 45%, var(--ink-4) 55%, transparent 55%);
  opacity: 0.55;
}

.arb-features .feat-off {
  color: var(--ink-3);
  text-decoration: line-through;
  text-decoration-color: var(--ink-4);
}

.arb-features .feat-emphasis,
.arb-features .feat-strong {
  font-weight: 600;
  color: var(--ink);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */

@media (max-width: 1100px) {
  .arb-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .engine-grid { grid-template-columns: 1fr; max-width: 540px; margin: 0 auto 32px; }
  .signals-grid { grid-template-columns: 1fr; }
  .protection-grid { grid-template-columns: 1fr; }
  .paper-arb-grid { grid-template-columns: 1fr; }
  .arch-flow { grid-template-columns: 1fr; gap: 12px; }
  .arch-arrow { transform: rotate(90deg); padding: 0; }
  .arb-tier-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .product-nav-inner { flex-direction: column; gap: 12px; align-items: stretch; padding: 14px 0; }
  .product-nav-links { overflow-x: auto; scrollbar-width: none; }
  .product-nav-links::-webkit-scrollbar { display: none; }
  .features-bento-arb { grid-template-columns: repeat(2, 1fr); }
  .bento, .bento-lead, .bento-wide { grid-column: span 2; }
  .arch-stats { grid-template-columns: repeat(2, 1fr); }
  .signals-table thead th,
  .signals-table tbody td { padding: 10px 14px; font-size: 11.5px; }
}

@media (max-width: 640px) {
  .features-bento-arb { grid-template-columns: 1fr; }
  .bento, .bento-lead, .bento-wide { grid-column: span 1; }
  .arb-tier-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto 32px; }
  .arch-stats { grid-template-columns: 1fr; }
  .feed-row-right { gap: 6px; }
  .feed-score { min-width: 36px; }
  .feed-tag { min-width: 54px; }
  .engine-combine { grid-template-columns: 1fr; text-align: center; }
  .signals-table-funding { font-size: 11px; }
  .signals-table-funding thead th,
  .signals-table-funding tbody td { padding: 8px 10px; }
}