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

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

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

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

.rmb-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;
}

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

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

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

.rmb-lede {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 32px;
  max-width: 540px;
}

.rmb-lede strong {
  color: var(--ink);
  font-weight: 600;
}

.rmb-figures {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
  margin-bottom: 28px;
}

.rmb-figures .figure {
  padding-right: 12px;
}

.rmb-figures .figure-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.value-plus {
  font-size: 18px;
  color: var(--accent);
  vertical-align: top;
  font-weight: 600;
}

.rmb-hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.rmb-terminal {
  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"] .rmb-terminal {
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
}

/* ═══════════════════════════════════════════
   PIPELINE LADDER
═══════════════════════════════════════════ */

.section-pipeline {
  background: var(--bg);
  padding: 112px 0;
}

.phase-ladder {
  display: flex;
  flex-direction: column;
  position: relative;
}

.phase-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.phase-row:first-child {
  border-top: 1px solid var(--line);
}

.phase-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding-top: 4px;
}

.phase-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  line-height: 1;
}

.phase-rule {
  width: 1px;
  flex: 1;
  background: var(--line);
  min-height: 40px;
}

.phase-row:last-child .phase-rule {
  display: none;
}

.phase-body {
  max-width: 760px;
}

.phase-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.phase-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--ink);
}

.phase-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.phase-desc {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin-bottom: 18px;
}

.phase-keys {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 8px;
}

.key-tile {
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.key-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
  word-break: break-all;
}

.key-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════════
   KEY BROWSER
═══════════════════════════════════════════ */

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

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

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

.browser-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.browser-status-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.browser-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.12em;
}

.browser-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
}

.kb-card {
  background: var(--bg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background var(--transition);
}

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

.kb-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--accent);
  word-break: break-all;
  letter-spacing: 0.01em;
}

.kb-data {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kb-data > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
}

.kb-field {
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

.kb-value {
  color: var(--ink);
  font-weight: 600;
  text-align: right;
}

.kb-pos { color: var(--accent); }
.kb-neg { color: var(--danger); }

.kb-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

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

/* ═══════════════════════════════════════════
   EXCHANGES
═══════════════════════════════════════════ */

.arch-callout {
  margin-bottom: 48px;
  padding: 28px 32px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: center;
}

.arch-mark {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  line-height: 1;
}

.arch-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.arch-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 12px;
}

.arch-body code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 3px;
}

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

.exchange-note {
  margin-top: 14px;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-2);
  background: var(--bg-elev);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.note-bullet {
  color: var(--accent);
  margin-right: 8px;
}

.exchange-count small {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-3);
}

/* Arb pair callout */
.arb-pair-callout {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 24px;
  align-items: center;
  padding: 36px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.arb-pair-side {
  text-align: center;
  padding: 20px;
}

.arb-pair-tier {
  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: 12px;
}

.arb-pair-num {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink-2);
  margin-bottom: 8px;
}

.arb-pair-best .arb-pair-num,
.arb-pair-best .arb-pair-tier {
  color: var(--accent);
}

.arb-pair-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.5;
}

.arb-pair-label span {
  font-size: 10px;
  color: var(--ink-4);
  display: block;
  margin-top: 4px;
  text-transform: none;
}

.arb-pair-arrow {
  text-align: center;
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--ink-4);
}

/* ═══════════════════════════════════════════
   INTEGRATE — LANGUAGE TABS
═══════════════════════════════════════════ */

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

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

.lang-tab-row {
  display: flex;
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.lang-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 18px 24px;
  background: var(--bg-elev);
  color: var(--ink-2);
  border-radius: 0;
  transition: all var(--transition);
}

.lang-tab:hover {
  background: var(--bg-elev-2);
  color: var(--ink);
}

.lang-tab.active {
  background: var(--bg);
  color: var(--ink);
}

.lang-tab.active .lang-tab-name {
  color: var(--accent);
}

.lang-tab-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.lang-tab-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

.lang-panel {
  padding: 28px 32px;
  background: var(--bg);
}

.lang-code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-2);
  white-space: pre;
  overflow-x: auto;
}

.lang-code .code-comment { color: var(--ink-4); font-style: italic; }
.lang-code .code-key { color: var(--accent); }
.lang-code .code-str { color: var(--warn); }
.lang-code .code-num { color: var(--info); }
.lang-code .code-kw { color: var(--accent); font-weight: 700; }

/* ═══════════════════════════════════════════
   USE CASES
═══════════════════════════════════════════ */

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

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.usecase {
  background: var(--bg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background var(--transition);
}

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

.usecase-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.usecase-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--ink-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.usecase-title {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 4px 0 4px;
}

.usecase-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  flex: 1;
}

.usecase-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 8px;
}

.usecase-keys code {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--bg-elev-2);
  padding: 3px 9px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

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

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

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

.rmb-tier {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background var(--transition);
}

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

.rmb-tier-featured {
  border-color: var(--line-accent);
  background: var(--bg-elev);
}

.rmb-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;
}

.rmb-tier-name {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 12px;
  margin-top: 14px;
}

.rmb-tier-pitch {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 24px;
  min-height: 64px;
}

.rmb-tier-price {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 8px;
  padding: 20px 0;
  margin-bottom: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.rmb-price-num {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--ink);
}

.rmb-price-suffix {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

.rmb-price-meta {
  flex-basis: 100%;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin-top: 6px;
  line-height: 1.5;
}

.rmb-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 28px;
  flex: 1;
}

.rmb-features li {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 10px;
  padding: 9px 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

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

.rmb-features li::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-top: 2px;
  flex-shrink: 0;
}

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

.rmb-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;
}

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

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

/* Bundle note */
.bundle-note {
  margin-top: 24px;
  margin-bottom: 32px;
  padding: 20px 24px;
  background: var(--accent-soft);
  border: 1px solid var(--line-accent);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  align-items: start;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.bundle-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  margin-top: 2px;
}

.bundle-note strong {
  color: var(--accent);
  font-weight: 700;
  margin-right: 6px;
}

.bundle-note code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-elev);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--accent);
}

/* Upgrade flow */
.upgrade-flow {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 24px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.flow-step-rmb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.flow-step-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  padding: 2px 6px;
  background: var(--bg-elev-2);
  border-radius: 3px;
}

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

.flow-step-best .flow-step-num {
  background: var(--accent);
  color: var(--accent-ink);
}

/* ═══════════════════════════════════════════
   ROADMAP
═══════════════════════════════════════════ */

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

.roadmap-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-bottom: 56px;
}

.rm-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.rm-marker {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.rm-version {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

.rm-status {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
}

.rm-status-shipped {
  background: var(--accent-soft);
  color: var(--accent);
}

.rm-status-active {
  background: var(--warn-soft);
  color: var(--warn);
}

.rm-status-planned,
.rm-status-future {
  background: var(--bg-elev-3);
  color: var(--ink-3);
}

.rm-row-shipped .rm-version { color: var(--accent); }

.rm-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--ink);
}

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

.rm-features li {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.55;
  border-bottom: 1px solid var(--line);
}

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

.rm-row-shipped .rm-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

.rm-row-active .rm-features li::before {
  content: '◐';
  color: var(--warn);
  flex-shrink: 0;
  font-weight: 600;
}

.rm-row-planned .rm-features li::before {
  content: '○';
  color: var(--ink-3);
  flex-shrink: 0;
}

.rm-row-future .rm-features li::before {
  content: '◇';
  color: var(--ink-4);
  flex-shrink: 0;
}

/* Engine modes */
.engine-modes {
  margin-top: 56px;
  padding-top: 56px;
  border-top: 1px solid var(--line);
}

.engine-modes-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 8px;
}

.engine-modes-sub {
  font-size: 14.5px;
  color: var(--ink-2);
  margin-bottom: 24px;
}

.engine-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.engine-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.engine-card-default {
  border-color: var(--line-accent);
  background: var(--accent-soft);
}

.engine-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.engine-card-default .engine-tag {
  color: var(--accent);
}

.engine-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}

.engine-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

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

@media (max-width: 1100px) {
  .rmb-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .rmb-figures { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 16px 0; }
  .rmb-figures .figure { padding: 8px 0; border-bottom: 1px solid var(--line); }
  .rmb-tier-grid { grid-template-columns: 1fr; max-width: 540px; margin: 0 auto 32px; }
  .browser-grid { grid-template-columns: repeat(2, 1fr); }
  .usecase-grid { grid-template-columns: repeat(2, 1fr); }
  .arb-pair-callout { grid-template-columns: 1fr; }
  .arb-pair-arrow { transform: rotate(90deg); }
  .engine-grid { grid-template-columns: 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; }
  .phase-row { grid-template-columns: 56px 1fr; gap: 20px; }
  .phase-num { font-size: 24px; }
  .lang-tab-row { flex-wrap: wrap; }
  .lang-tab { min-width: 140px; }
  .browser-grid { grid-template-columns: 1fr; }
  .rm-row { grid-template-columns: 1fr; gap: 16px; }
  .rm-marker { flex-direction: row; align-items: center; }
  .arch-callout { grid-template-columns: 1fr; text-align: center; }
}

@media (max-width: 640px) {
  .rmb-figures { grid-template-columns: 1fr; gap: 0; }
  .usecase-grid { grid-template-columns: 1fr; }
  .rmb-tier { padding: 28px 24px; }
  .upgrade-flow { flex-direction: column; align-items: stretch; }
  .upgrade-flow .flow-arrow { transform: rotate(90deg); text-align: center; }
  .lang-panel { padding: 18px; }
  .lang-code { font-size: 11.5px; }
}