.arsenal-body {
  min-height: 100dvh;
}

.arsenal-nav {
  display: flex;
}

.arsenal-hero {
  padding: clamp(72px, 9vw, 112px) 0 clamp(60px, 8vw, 92px);
}

.arsenal-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 0.55fr);
  gap: clamp(32px, 5vw, 70px);
  align-items: center;
}

.arsenal-hero-copy {
  display: grid;
  gap: 20px;
}

.microcourse-page {
  display: block;
}

.microcourse-hero {
  padding: clamp(82px, 10vw, 122px) 0 clamp(54px, 7vw, 86px);
}

.microcourse-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.54fr);
  gap: clamp(36px, 6vw, 84px);
  align-items: end;
}

.microcourse-title-block {
  display: grid;
  gap: 20px;
}

.microcourse-title-block h1 {
  max-width: 760px;
  font-size: clamp(2.35rem, 5vw, 5rem);
  line-height: 1.02;
}

.microcourse-public-note {
  max-width: 620px;
  color: var(--muted);
  font-size: 0.95rem;
}

.microcourse-summary-panel {
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  padding: clamp(22px, 3vw, 32px);
  background: rgba(255, 253, 247, 0.72);
  box-shadow: var(--shadow-soft);
}

.microcourse-summary-panel h2 {
  margin-top: 10px;
  font-size: clamp(1.35rem, 2.25vw, 2rem);
}

.microcourse-summary-list {
  display: grid;
  gap: 9px;
  margin: 18px 0 0;
  padding: 0;
  color: var(--muted);
  list-style: none;
}

.microcourse-summary-list li {
  border-top: 1px solid rgba(20, 23, 19, 0.08);
  padding-top: 9px;
}

.microcourse-preview {
  padding: clamp(54px, 8vw, 94px) 0;
  background: rgba(255, 253, 247, 0.42);
  border-top: 1px solid rgba(20, 23, 19, 0.08);
  border-bottom: 1px solid rgba(20, 23, 19, 0.08);
}

.microcourse-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.52fr);
  gap: clamp(34px, 5vw, 70px);
  align-items: start;
}

.microcourse-content {
  display: grid;
  gap: 22px;
  max-width: 780px;
}

.microcourse-content h2 {
  max-width: 720px;
  font-size: clamp(1.85rem, 3.2vw, 3rem);
}

.microcourse-content h3 {
  font-size: clamp(1.2rem, 1.7vw, 1.55rem);
}

.microcourse-content p {
  color: var(--muted);
  font-size: clamp(1rem, 1.22vw, 1.08rem);
}

.microcourse-note {
  display: grid;
  gap: 10px;
  border-left: 3px solid var(--accent);
  padding: 16px 0 16px 20px;
}

.microcourse-note span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.microcourse-outline {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.microcourse-outline li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  border-top: 1px solid rgba(20, 23, 19, 0.09);
  padding-top: 14px;
}

.microcourse-outline li > span {
  color: var(--accent);
  font-family: "Optician Sans", Arial, sans-serif;
  font-size: 1.1rem;
}

.microcourse-outline strong,
.microcourse-outline small {
  display: block;
}

.microcourse-outline small {
  margin-top: 2px;
  color: var(--muted);
}

.microcourse-gate {
  position: sticky;
  top: 92px;
}

.arsenal-proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.arsenal-proof-strip span {
  min-width: 128px;
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  padding: 12px 14px;
  background: rgba(255, 253, 247, 0.72);
  color: var(--muted);
}

.arsenal-proof-strip strong {
  display: block;
  color: var(--ink);
  font-family: "Optician Sans", Arial, sans-serif;
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1;
}

.access-panel {
  border: 1px solid rgba(20, 23, 19, 0.14);
  border-radius: 8px;
  padding: clamp(22px, 3vw, 34px);
  background: rgba(255, 253, 247, 0.88);
  box-shadow: var(--shadow-lift);
}

.microcourses-index-panel {
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  padding: clamp(22px, 3vw, 32px);
  background: rgba(255, 253, 247, 0.68);
  box-shadow: var(--shadow-soft);
}

.microcourses-index-panel h2 {
  margin-top: 8px;
  font-size: clamp(1.35rem, 2.25vw, 2rem);
}

.course-catalog {
  padding: clamp(60px, 8vw, 100px) 0;
  border-top: 1px solid rgba(20, 23, 19, 0.08);
  background: rgba(255, 253, 247, 0.34);
}

.course-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.microcourse-card {
  min-height: 258px;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 14px;
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(255, 253, 247, 0.78);
  box-shadow: 0 12px 28px rgba(31, 47, 35, 0.07);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.microcourse-card:hover {
  transform: translateY(-3px);
  border-color: rgba(155, 47, 31, 0.35);
  box-shadow: var(--shadow-lift);
}

.card-kicker {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.microcourse-card h3 {
  max-width: 520px;
  font-size: clamp(1.25rem, 1.9vw, 1.75rem);
}

.microcourse-card p {
  color: var(--muted);
  line-height: 1.55;
}

.card-action {
  width: fit-content;
  border-top: 1px solid rgba(20, 23, 19, 0.12);
  padding-top: 10px;
  color: var(--ink);
  font-weight: 800;
}

.catalog-access-panel {
  max-width: 720px;
  margin: clamp(30px, 5vw, 54px) auto 0;
}

.access-panel h2 {
  margin-top: 8px;
  font-size: clamp(1.45rem, 2.4vw, 2.15rem);
}

.access-panel p {
  margin-top: 12px;
  color: var(--muted);
}

.access-form {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.access-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
}

.access-form input {
  width: 100%;
  border: 1px solid rgba(20, 23, 19, 0.18);
  border-radius: 8px;
  padding: 13px 14px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  outline: none;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.access-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(155, 47, 31, 0.11);
}

.full-button {
  width: 100%;
  justify-content: center;
  border: 0;
  cursor: pointer;
}

.text-button,
.secondary-button {
  border: 1px solid rgba(20, 23, 19, 0.14);
  border-radius: 8px;
  padding: 11px 14px;
  background: rgba(255, 253, 247, 0.7);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  transition: transform 180ms var(--ease), background 180ms var(--ease);
}

.text-button {
  border: 0;
  padding: 6px;
  background: transparent;
  color: var(--muted);
  text-decoration: underline;
}

.secondary-button:hover,
.text-button:hover {
  transform: translateY(-1px);
}

.access-status {
  min-height: 24px;
  font-size: 0.9rem;
}

.access-status.error {
  color: var(--accent-dark);
}

.hidden {
  display: none !important;
}

.arsenal-shell {
  padding: 36px 0 92px;
}

.app-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 42px);
  align-items: start;
}

.library-sidebar,
.lesson-stage {
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  background: rgba(255, 253, 247, 0.78);
  box-shadow: var(--shadow-soft);
}

.library-sidebar {
  position: sticky;
  top: 88px;
  max-height: calc(100dvh - 110px);
  overflow: auto;
  padding: 20px;
}

.library-head h2 {
  margin-top: 6px;
  font-size: 1.45rem;
}

.course-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.course-button {
  width: 100%;
  display: grid;
  gap: 8px;
  border: 1px solid rgba(20, 23, 19, 0.11);
  border-radius: 8px;
  padding: 13px;
  background: rgba(255, 253, 247, 0.74);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  font: inherit;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.course-button:hover,
.course-button.active {
  transform: translateY(-1px);
  border-color: rgba(155, 47, 31, 0.4);
  background: var(--paper);
}

.course-button strong {
  font-family: "Optician Sans", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.18;
}

.course-button span {
  color: var(--muted);
  font-size: 0.82rem;
}

.lesson-stage {
  min-width: 0;
  overflow: hidden;
}

.lesson-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 24px;
  align-items: start;
  border-bottom: 1px solid rgba(20, 23, 19, 0.1);
  padding: clamp(20px, 3vw, 32px);
}

.lesson-toolbar h2 {
  margin-top: 6px;
  font-size: clamp(1.4rem, 2.7vw, 2.35rem);
}

.progress-block {
  display: grid;
  gap: 9px;
  color: var(--muted);
  font-size: 0.82rem;
}

.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(20, 23, 19, 0.1);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 260ms var(--ease);
}

.lesson-reader {
  display: grid;
  gap: 28px;
  padding: clamp(22px, 3.4vw, 42px);
}

.course-intro {
  display: grid;
  gap: 14px;
  border-bottom: 1px solid rgba(20, 23, 19, 0.1);
  padding-bottom: 24px;
}

.course-intro p {
  color: var(--muted);
}

.lesson-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.lesson-tab {
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 999px;
  padding: 7px 11px;
  background: rgba(255, 253, 247, 0.65);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.lesson-tab.active {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.lesson-content {
  display: grid;
  gap: 18px;
  max-width: 760px;
}

.lesson-content h3 {
  font-size: clamp(1.45rem, 2.4vw, 2.15rem);
}

.lesson-content h4 {
  margin: 12px 0 0;
  font-family: "Optician Sans", Arial, sans-serif;
  font-size: 1.05rem;
  font-weight: 400;
}

.lesson-content p {
  color: var(--muted);
}

.checklist {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 9px;
  color: var(--ink);
}

.checklist li::before {
  content: "";
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border: 1px solid var(--accent);
  border-radius: 4px;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  border-top: 1px solid rgba(20, 23, 19, 0.1);
  padding: clamp(18px, 2.5vw, 28px);
}

.lesson-actions .button {
  border: 0;
  cursor: pointer;
}

.arsenal-testimonials {
  padding: 0 0 100px;
}

.testimonial-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.testimonial-card {
  border: 1px solid rgba(20, 23, 19, 0.12);
  border-radius: 8px;
  padding: 18px;
  background: rgba(255, 253, 247, 0.78);
}

.testimonial-card p {
  color: var(--ink);
}

.testimonial-card span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.84rem;
}

@media (max-width: 860px) {
  .arsenal-hero-grid,
  .microcourse-hero-grid,
  .microcourse-content-grid,
  .course-card-grid,
  .app-grid,
  .lesson-toolbar,
  .testimonial-list {
    grid-template-columns: 1fr;
  }

  .library-sidebar {
    position: static;
    max-height: none;
  }

  .microcourse-gate {
    position: static;
  }

  .arsenal-nav a:not(.nav-cta) {
    display: none;
  }
}

@media (max-width: 560px) {
  .arsenal-proof-strip span,
  .lesson-actions button {
    width: 100%;
  }
}