:root {
  --ink-1000: oklch(0.115 0.012 26);
  --ink-950: oklch(0.145 0.014 26);
  --ink-900: oklch(0.185 0.016 26);
  --ink-850: oklch(0.215 0.016 26);
  --paper-50: oklch(0.965 0.02 82);
  --paper-100: oklch(0.925 0.035 82);
  --paper-200: oklch(0.84 0.04 78);
  --paper-400: oklch(0.66 0.035 70);
  --red-400: oklch(0.57 0.18 29);
  --red-500: oklch(0.48 0.17 28);
  --red-600: oklch(0.39 0.14 28);
  --green-400: oklch(0.72 0.15 145);
  --white: oklch(0.99 0.005 80);
  --line: oklch(1 0 0 / 0.1);
  --line-soft: oklch(1 0 0 / 0.06);
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-height: 78px;
  --sidebar-width: 248px;
  --pulse-width: 270px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--ink-1000);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--paper-100);
  background:
    radial-gradient(circle at 48% -20%, oklch(0.38 0.08 28 / 0.22), transparent 33rem),
    var(--ink-1000);
  font-family: var(--sans);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  position: fixed;
  z-index: -1;
  content: "";
  inset: 0;
  opacity: 0.13;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.24'/%3E%3C/svg%3E");
}

::selection {
  color: var(--white);
  background: var(--red-500);
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-underline-position: from-font;
  text-decoration-thickness: from-font;
}

img {
  display: block;
  max-width: 100%;
}

body.newsletter-open {
  overflow: hidden;
}

.newsletter-gate[hidden],
.newsletter-submit-frame {
  display: none;
}

.newsletter-gate {
  position: fixed;
  z-index: 900;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 22px;
  opacity: 0;
  transition-property: opacity;
  transition-duration: 260ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-gate.is-visible {
  opacity: 1;
}

.newsletter-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  background:
    radial-gradient(circle at 50% 48%, oklch(0.48 0.17 28 / 0.2), transparent 30rem),
    oklch(0.07 0.01 26 / 0.86);
  border: 0;
  opacity: 0;
  backdrop-filter: blur(0);
  transition-property: opacity, backdrop-filter;
  transition-duration: 320ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-gate.is-visible .newsletter-backdrop {
  opacity: 1;
  backdrop-filter: blur(14px);
}

.newsletter-card {
  position: relative;
  isolation: isolate;
  width: min(100%, 680px);
  overflow: hidden;
  padding: clamp(30px, 5vw, 58px);
  color: var(--paper-100);
  background:
    linear-gradient(135deg, oklch(1 0 0 / 0.045), transparent 42%),
    var(--ink-900);
  border-radius: 24px;
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.12),
    0 36px 90px oklch(0 0 0 / 0.58),
    0 0 80px oklch(0.48 0.17 28 / 0.14);
  opacity: 0;
  filter: blur(10px);
  transform: translateY(18px) scale(0.96);
  transition-property: opacity, filter, transform;
  transition-duration: 360ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-gate.is-visible .newsletter-card {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0) scale(1);
}

.newsletter-card::before {
  position: absolute;
  z-index: -1;
  content: "";
  inset: -30% auto auto 48%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, oklch(0.48 0.17 28 / 0.24), transparent 64%);
  transform: translateX(-50%);
  pointer-events: none;
}

.newsletter-signal {
  position: absolute;
  z-index: 4;
  inset: 50% auto auto 50%;
  width: 24px;
  height: 24px;
  border: 2px solid var(--red-400);
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.2);
  pointer-events: none;
}

.newsletter-close {
  position: absolute;
  z-index: 5;
  inset: 16px 16px auto auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background: oklch(1 0 0 / 0.055);
  border: 0;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px oklch(1 0 0 / 0.1);
  cursor: pointer;
  transition-property: background-color, transform;
  transition-duration: 180ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-close:hover,
.newsletter-close:focus-visible {
  background: oklch(1 0 0 / 0.11);
}

.newsletter-close:active {
  transform: scale(0.96);
}

.newsletter-close span {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 16px;
  height: 1px;
  background: var(--paper-100);
}

.newsletter-close span:first-child {
  transform: translate(-50%, -50%) rotate(45deg);
}

.newsletter-close span:last-child {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.newsletter-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(42px, 7vw, 72px);
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.newsletter-kicker i {
  width: 8px;
  height: 8px;
  background: var(--red-400);
  border-radius: 50%;
  box-shadow: 0 0 18px var(--red-400);
  animation: newsletter-pulse 1.8s ease-in-out infinite;
}

.newsletter-label {
  margin: 0 0 12px;
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.newsletter-copy h2 {
  max-width: 13ch;
  margin: 0;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.94;
  text-wrap: balance;
}

.newsletter-copy h2 em {
  color: var(--red-400);
  font-weight: inherit;
}

.newsletter-copy > p:last-child {
  max-width: 55ch;
  margin: 22px 0 0;
  color: var(--paper-200);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.newsletter-form {
  margin-top: 30px;
}

.newsletter-form > label {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.newsletter-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 8px;
  background: var(--ink-1000);
  border-radius: 16px;
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.12),
    0 14px 36px oklch(0 0 0 / 0.28);
  transition-property: box-shadow;
  transition-duration: 180ms;
}

.newsletter-field:focus-within {
  box-shadow:
    inset 0 0 0 1px var(--red-400),
    0 14px 36px oklch(0 0 0 / 0.28),
    0 0 0 4px oklch(0.48 0.17 28 / 0.18);
}

.newsletter-field input {
  min-width: 0;
  height: 54px;
  padding: 0 16px;
  color: var(--paper-50);
  background: transparent;
  border: 0;
  outline: 0;
}

.newsletter-field input::placeholder {
  color: var(--paper-400);
}

.newsletter-field button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 174px;
  min-height: 54px;
  padding: 0 18px;
  color: var(--paper-50);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--red-500);
  border: 0;
  border-radius: 8px;
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.12),
    0 8px 20px oklch(0.48 0.17 28 / 0.28);
  cursor: pointer;
  transition-property: background-color, transform;
  transition-duration: 180ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-field button:hover,
.newsletter-field button:focus-visible {
  background: var(--red-400);
}

.newsletter-field button:active {
  transform: scale(0.96);
}

.newsletter-button-icon {
  font-size: 1.15rem;
  line-height: 1;
}

.newsletter-form.is-sending .newsletter-button-icon {
  animation: newsletter-transmit 660ms ease-in-out infinite alternate;
}

.newsletter-error {
  min-height: 18px;
  margin: 8px 4px 0;
  color: oklch(0.76 0.16 28);
  font-size: 0.72rem;
}

.newsletter-terms {
  margin: 0 4px;
  color: var(--paper-400);
  font-size: 0.65rem;
  line-height: 1.45;
}

.newsletter-terms a {
  color: var(--paper-200);
}

.newsletter-confirmation {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 32px;
  text-align: center;
  background:
    radial-gradient(circle, oklch(0.48 0.17 28 / 0.34), transparent 50%),
    var(--ink-900);
  opacity: 0;
  filter: blur(4px);
  transform: scale(0.25);
  pointer-events: none;
  transition-property: opacity, filter, transform;
  transition-duration: 300ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.newsletter-gate.is-confirmed .newsletter-confirmation {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

.confirmation-mark {
  display: grid;
  place-items: center;
  width: 82px;
  height: 82px;
  margin-bottom: 28px;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: 1.2rem;
  border-radius: 50%;
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.32),
    0 0 0 12px oklch(0.48 0.17 28 / 0.12),
    0 0 52px oklch(0.48 0.17 28 / 0.56);
}

.newsletter-confirmation p,
.newsletter-confirmation strong,
.newsletter-confirmation small {
  margin: 0;
}

.newsletter-confirmation p {
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.newsletter-confirmation strong {
  margin-top: 10px;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: clamp(2.3rem, 6vw, 4.7rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.96;
}

.newsletter-confirmation small {
  margin-top: 16px;
  color: var(--paper-200);
  font-size: 0.76rem;
}

.newsletter-gate.is-confirmed .newsletter-signal {
  animation: newsletter-shockwave 760ms cubic-bezier(0.2, 0, 0, 1) forwards;
}

.newsletter-gate.is-exiting {
  animation: newsletter-gate-flash 680ms ease-in forwards;
}

.newsletter-gate.is-exiting .newsletter-card {
  animation: newsletter-card-exit 680ms cubic-bezier(0.7, 0, 1, 0.5) forwards;
}

.newsletter-gate.is-closing .newsletter-card {
  opacity: 0;
  filter: blur(5px);
  transform: translateY(12px) scale(0.98);
}

@keyframes newsletter-pulse {
  0%,
  100% {
    opacity: 0.48;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes newsletter-transmit {
  from {
    opacity: 0.4;
    transform: translateX(-3px);
  }
  to {
    opacity: 1;
    transform: translateX(3px);
  }
}

@keyframes newsletter-shockwave {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(0.2);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(38);
  }
}

@keyframes newsletter-gate-flash {
  0% {
    filter: brightness(1);
    opacity: 1;
  }
  24% {
    filter: brightness(2.25);
    opacity: 1;
  }
  100% {
    filter: brightness(1);
    opacity: 0;
  }
}

@keyframes newsletter-card-exit {
  0% {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
  }
  28% {
    opacity: 1;
    filter: blur(0);
    transform: translateY(-4px) scale(1.025);
  }
  100% {
    opacity: 0;
    filter: blur(18px);
    transform: translateY(14px) scale(0.72);
  }
}

.skip-link {
  position: fixed;
  z-index: 1000;
  inset: 10px auto auto 10px;
  padding: 12px 16px;
  color: var(--ink-1000);
  background: var(--paper-50);
  transform: translateY(-160%);
  transition-property: transform;
  transition-duration: 180ms;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.study-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding-inline: 22px;
  background: oklch(0.115 0.012 26 / 0.88);
  box-shadow:
    0 1px 0 var(--line),
    0 12px 34px oklch(0 0 0 / 0.24);
  backdrop-filter: blur(18px);
}

.study-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  text-decoration: none;
}

.study-brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: 0.86rem;
  border-radius: 50%;
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.22),
    0 8px 24px oklch(0 0 0 / 0.28);
}

.study-brand > span:last-child {
  display: grid;
  gap: 2px;
}

.study-brand strong {
  font-family: var(--serif);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.study-brand small {
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.59rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--paper-200);
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-status i,
.class-status i {
  width: 7px;
  height: 7px;
  background: var(--green-400);
  border-radius: 50%;
  box-shadow: 0 0 14px var(--green-400);
}

.mobile-nav-toggle {
  display: none;
  place-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 0;
}

.mobile-nav-toggle > span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 1px;
  margin: 3px;
  background: var(--paper-100);
  transition-property: transform;
  transition-duration: 180ms;
}

.study-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--pulse-width);
  min-height: 100vh;
  padding-top: var(--header-height);
}

.study-sidebar,
.study-pulse {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
}

.study-sidebar {
  z-index: 60;
  display: flex;
  flex-direction: column;
  padding: 24px 14px 18px;
  background: oklch(0.145 0.014 26 / 0.88);
  box-shadow: 1px 0 0 var(--line-soft);
  backdrop-filter: blur(14px);
}

.sidebar-intro {
  display: grid;
  grid-template-columns: 10px 1fr;
  column-gap: 10px;
  margin: 0 8px 26px;
  padding: 14px;
  background: var(--ink-900);
  border-radius: 12px;
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 10px 28px oklch(0 0 0 / 0.2);
}

.signal-dot {
  grid-row: 1 / 3;
  align-self: center;
  width: 8px;
  height: 8px;
  background: var(--red-400);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--red-400);
}

.sidebar-intro p,
.sidebar-intro strong {
  margin: 0;
}

.sidebar-intro p {
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.sidebar-intro strong {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 0.88rem;
  font-weight: 600;
}

.channel-nav {
  display: grid;
}

.channel-label {
  margin: 17px 12px 7px;
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.channel-link {
  display: grid;
  grid-template-columns: 22px 1fr auto;
  align-items: center;
  min-height: 42px;
  padding: 0 12px;
  color: var(--paper-400);
  font-size: 0.83rem;
  text-decoration: none;
  border-radius: 8px;
  transition-property: color, background-color, transform;
  transition-duration: 180ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.channel-link:hover,
.channel-link:focus-visible,
.channel-link.is-active {
  color: var(--paper-50);
  background: oklch(1 0 0 / 0.065);
}

.channel-link:active {
  transform: scale(0.96);
}

.channel-link > span {
  color: var(--red-400);
  font-family: var(--mono);
  font-weight: 700;
}

.channel-link small {
  min-width: 24px;
  padding: 3px 5px;
  color: var(--paper-200);
  font-family: var(--mono);
  font-size: 0.58rem;
  text-align: center;
  background: oklch(1 0 0 / 0.08);
  border-radius: 999px;
}

.sidebar-footer {
  margin-top: auto;
  padding: 18px 12px 4px;
  box-shadow: 0 -1px 0 var(--line-soft);
}

.sidebar-footer p {
  margin: 0;
  color: var(--paper-400);
  font-family: var(--serif);
  font-size: 0.76rem;
  line-height: 1.45;
}

.sidebar-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 8px;
  color: var(--paper-100);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.study-main {
  min-width: 0;
  overflow: hidden;
}

.section-anchor {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.welcome-panel,
.ecosystem-section,
.path-section,
.classes-section,
.notes-section,
.reading-section,
.community-section {
  padding: clamp(64px, 7vw, 110px) clamp(28px, 5vw, 88px);
}

.welcome-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  align-items: center;
  gap: clamp(42px, 7vw, 110px);
  min-height: calc(100vh - var(--header-height));
}

.welcome-panel::before {
  position: absolute;
  z-index: -1;
  content: "";
  inset: 8% 8% auto auto;
  width: 35vw;
  height: 35vw;
  max-width: 520px;
  max-height: 520px;
  background: radial-gradient(circle, oklch(0.48 0.17 28 / 0.18), transparent 66%);
  filter: blur(12px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.welcome-copy h1,
.section-heading h2,
.reading-copy h2 {
  margin: 0;
  color: var(--paper-50);
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.welcome-copy h1 {
  max-width: 14ch;
  font-size: clamp(3.2rem, 6.4vw, 7.2rem);
  line-height: 0.91;
}

.welcome-copy h1 span {
  color: var(--red-400);
  font-style: italic;
}

.welcome-copy > p:not(.eyebrow) {
  max-width: 60ch;
  margin: 30px 0 0;
  color: var(--paper-200);
  font-family: var(--serif);
  font-size: clamp(1rem, 1.3vw, 1.25rem);
  line-height: 1.6;
  text-wrap: pretty;
}

.welcome-actions,
.reading-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  border-radius: 6px;
  box-shadow: 0 10px 30px oklch(0 0 0 / 0.22);
  transition-property: color, background-color, box-shadow, transform;
  transition-duration: 180ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.button:hover,
.button:focus-visible {
  box-shadow: 0 14px 36px oklch(0 0 0 / 0.34);
  transform: translateY(-2px);
}

.button:active {
  transform: scale(0.96);
}

.button-primary {
  color: var(--white);
  background: var(--red-500);
}

.button-secondary {
  color: var(--paper-50);
  background: oklch(1 0 0 / 0.06);
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 10px 30px oklch(0 0 0 / 0.18);
}

.frequency-board {
  position: relative;
  padding: clamp(28px, 4vw, 48px);
  overflow: hidden;
  color: var(--ink-1000);
  background:
    linear-gradient(oklch(0.965 0.02 82 / 0.94), oklch(0.925 0.035 82 / 0.96)),
    var(--paper-100);
  border-radius: 18px;
  box-shadow:
    0 40px 90px oklch(0 0 0 / 0.34),
    inset 0 0 0 1px oklch(0 0 0 / 0.1);
  transform: rotate(1.2deg);
}

.frequency-board::after {
  position: absolute;
  content: "";
  inset: 0 auto 0 0;
  width: 9px;
  background: var(--red-500);
}

.board-topline {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--red-600);
  font-family: var(--mono);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.frequency-board blockquote {
  margin: clamp(70px, 9vw, 130px) 0 42px;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

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

.board-tags span {
  padding: 6px 9px;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px oklch(0 0 0 / 0.16);
}

.frequency-board a {
  display: inline-flex;
  justify-content: space-between;
  width: 100%;
  min-height: 44px;
  margin-top: 26px;
  padding-top: 14px;
  font-size: 0.72rem;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow: 0 -1px 0 oklch(0 0 0 / 0.16);
}

.path-section,
.notes-section {
  background: var(--paper-100);
  color: var(--ink-1000);
}

.ecosystem-section {
  background:
    linear-gradient(180deg, oklch(0.19 0.022 26), oklch(0.145 0.014 26));
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.ecosystem-card {
  position: relative;
  display: flex;
  grid-column: span 2;
  flex-direction: column;
  min-height: 360px;
  padding: 25px;
  overflow: hidden;
  background: oklch(1 0 0 / 0.035);
  border-radius: 12px;
  box-shadow:
    inset 0 0 0 1px var(--line-soft),
    0 18px 44px oklch(0 0 0 / 0.18);
  transition-property: transform, box-shadow;
  transition-duration: 220ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.ecosystem-card:nth-child(4),
.ecosystem-card:nth-child(5) {
  grid-column: span 3;
}

.ecosystem-card:hover {
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.13),
    0 26px 58px oklch(0 0 0 / 0.27);
  transform: translateY(-4px);
}

.ecosystem-card-featured {
  background:
    linear-gradient(145deg, oklch(0.53 0.18 28 / 0.35), transparent 58%),
    oklch(1 0 0 / 0.04);
}

.ecosystem-number {
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
}

.ecosystem-label {
  margin: auto 0 10px;
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.61rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ecosystem-card h3 {
  max-width: 13ch;
  margin: 0;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: clamp(1.55rem, 2.4vw, 2.45rem);
  font-weight: 500;
  line-height: 1.03;
  letter-spacing: -0.038em;
  text-wrap: balance;
}

.ecosystem-card > p:not(.ecosystem-label) {
  max-width: 48ch;
  margin: 16px 0 0;
  color: var(--paper-200);
  font-family: var(--serif);
  font-size: 0.88rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.ecosystem-card a {
  display: inline-flex;
  align-items: end;
  justify-content: space-between;
  min-height: 44px;
  margin-top: 18px;
  color: var(--paper-100);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 34px;
  margin-bottom: 44px;
}

.section-heading h2,
.reading-copy h2 {
  font-size: clamp(2.5rem, 5vw, 5.4rem);
  line-height: 0.98;
}

.path-section .section-heading h2,
.notes-section .section-heading h2 {
  color: var(--ink-1000);
}

.section-heading > p {
  max-width: 46ch;
  margin: 0;
  color: var(--paper-400);
  font-family: var(--serif);
  font-size: 0.98rem;
  line-height: 1.5;
  text-wrap: pretty;
}

.path-section .section-heading > p,
.notes-section .section-heading > p {
  color: oklch(0.4 0.03 38);
}

.progress-copy {
  white-space: nowrap;
}

.progress-copy strong {
  color: var(--red-600);
  font-family: var(--mono);
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 5px;
  margin-bottom: 30px;
  overflow: hidden;
  background: oklch(0 0 0 / 0.1);
  border-radius: 999px;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--red-500);
  border-radius: inherit;
  transition-property: width;
  transition-duration: 320ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.path-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.path-list li + li {
  box-shadow: 0 -1px 0 oklch(0 0 0 / 0.12);
}

.path-check {
  display: grid;
  grid-template-columns: 28px 56px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  width: 100%;
  min-height: 112px;
  padding: 20px 8px;
  color: var(--ink-1000);
  text-align: start;
  background: transparent;
  border: 0;
  cursor: pointer;
  transition-property: opacity, transform;
  transition-duration: 180ms;
}

.path-check:active {
  transform: scale(0.96);
}

.path-check[aria-pressed="true"] {
  opacity: 0.58;
}

.check-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px oklch(0 0 0 / 0.22);
  transition-property: background-color, box-shadow;
  transition-duration: 180ms;
}

.path-check[aria-pressed="true"] .check-icon {
  background: var(--red-500);
  box-shadow: none;
}

.path-check[aria-pressed="true"] .check-icon::after {
  content: "✓";
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 900;
}

.path-number {
  color: var(--red-600);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 800;
}

.path-copy {
  display: grid;
  gap: 8px;
}

.path-copy strong {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.6rem);
}

.path-copy small {
  max-width: 64ch;
  color: oklch(0.38 0.025 35);
  font-size: 0.86rem;
  line-height: 1.5;
}

.path-time {
  color: oklch(0.45 0.025 38);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

.classes-section {
  background: var(--ink-950);
}

.class-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.class-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 480px;
  padding: 26px;
  background: var(--ink-900);
  border-radius: 14px;
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 20px 44px oklch(0 0 0 / 0.2);
  transition-property: transform, box-shadow;
  transition-duration: 220ms;
  transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
}

.class-card:hover {
  box-shadow:
    inset 0 0 0 1px oklch(1 0 0 / 0.15),
    0 28px 60px oklch(0 0 0 / 0.3);
  transform: translateY(-4px);
}

.class-card-featured {
  background:
    linear-gradient(145deg, oklch(0.5 0.17 28 / 0.3), transparent 54%),
    var(--ink-900);
}

.class-card-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  min-height: 28px;
}

.class-type,
.class-duration,
.class-status,
.class-number {
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.class-type {
  color: var(--red-400);
}

.class-duration,
.class-status {
  color: var(--paper-400);
}

.class-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.class-number {
  margin: 74px 0 12px;
  color: var(--paper-400);
}

.class-card h3 {
  max-width: 12ch;
  margin: 0;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.class-card > p:not(.class-number) {
  margin: 18px 0 0;
  color: var(--paper-200);
  font-family: var(--serif);
  font-size: 0.94rem;
  line-height: 1.55;
  text-wrap: pretty;
}

.class-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.class-card li {
  padding: 6px 9px;
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.56rem;
  text-transform: uppercase;
  background: oklch(1 0 0 / 0.05);
  border-radius: 999px;
}

.class-save,
.pulse-save {
  min-height: 44px;
  color: var(--paper-100);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-transform: uppercase;
  transition-property: color, background-color, transform;
  transition-duration: 180ms;
}

.class-save {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 9px;
  margin-top: auto;
  padding: 0;
}

.class-save:active,
.pulse-save:active {
  transform: scale(0.96);
}

.save-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  font-size: 1.05rem;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--line);
}

.class-save.is-saved,
.pulse-save.is-saved {
  color: var(--red-400);
}

.notes-heading {
  align-items: center;
}

.note-search {
  display: flex;
  align-items: center;
  width: min(100%, 300px);
  min-height: 48px;
  padding: 0 14px;
  color: oklch(0.35 0.02 35);
  background: oklch(1 0 0 / 0.4);
  border-radius: 9px;
  box-shadow:
    inset 0 0 0 1px oklch(0 0 0 / 0.12),
    0 8px 24px oklch(0 0 0 / 0.06);
}

.note-search svg {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
}

.note-search input {
  min-width: 0;
  width: 100%;
  min-height: 48px;
  padding: 0 0 0 10px;
  color: var(--ink-1000);
  font-size: 1rem;
  background: transparent;
  border: 0;
  outline: 0;
}

.note-search input::placeholder {
  color: oklch(0.45 0.025 35);
}

.note-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.filter-button {
  min-height: 44px;
  padding: 0 14px;
  color: oklch(0.38 0.025 35);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  background: transparent;
  border: 0;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px oklch(0 0 0 / 0.14);
  cursor: pointer;
  text-transform: uppercase;
  transition-property: color, background-color, transform;
  transition-duration: 180ms;
}

.filter-button:hover,
.filter-button:focus-visible,
.filter-button.is-active {
  color: var(--white);
  background: var(--red-500);
}

.filter-button:active {
  transform: scale(0.96);
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.note-card {
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 24px;
  color: var(--ink-1000);
  background: oklch(0.97 0.018 82);
  border-radius: 12px;
  box-shadow:
    inset 0 0 0 1px oklch(0 0 0 / 0.09),
    0 14px 34px oklch(0 0 0 / 0.07);
  transition-property: opacity, transform;
  transition-duration: 180ms;
}

.note-card[hidden] {
  display: none;
}

.note-card:hover {
  transform: translateY(-3px);
}

.note-card-lead {
  color: var(--paper-50);
  background: var(--red-600);
}

.note-meta {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.note-card:not(.note-card-lead) .note-meta {
  color: var(--red-600);
}

.note-card h3 {
  margin: 70px 0 0;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.note-card p {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: 0.88rem;
  line-height: 1.5;
  text-wrap: pretty;
}

.note-card:not(.note-card-lead) p {
  color: oklch(0.37 0.025 35);
}

.note-card a,
.note-state {
  display: inline-flex;
  align-items: end;
  min-height: 44px;
  margin-top: auto;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

.note-card a {
  justify-content: space-between;
}

.note-state {
  color: oklch(0.48 0.03 38);
}

.empty-notes {
  margin: 28px 0 0;
  color: oklch(0.38 0.025 35);
  font-family: var(--serif);
}

.reading-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.62fr) minmax(0, 1.38fr);
  align-items: center;
  gap: clamp(48px, 8vw, 120px);
  background: var(--ink-950);
}

.reading-cover {
  position: relative;
  justify-self: end;
  width: min(100%, 360px);
  transform: rotate(-2deg);
}

.reading-cover img {
  width: 100%;
  outline: 1px solid oklch(1 0 0 / 0.1);
  box-shadow: 30px 40px 70px oklch(0 0 0 / 0.42);
}

.reading-cover span {
  position: absolute;
  inset: auto auto 24px -18px;
  padding: 10px 13px;
  color: var(--white);
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: var(--red-500);
  text-transform: uppercase;
}

.reading-copy h2 {
  max-width: 10ch;
}

.reading-lede {
  max-width: 58ch;
  margin: 24px 0 0;
  color: var(--paper-200);
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.6;
}

.reader-prompts {
  display: grid;
  margin-top: 34px;
}

.reader-prompts article {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 16px;
  padding: 17px 0;
  box-shadow: 0 -1px 0 var(--line-soft);
}

.reader-prompts span {
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 800;
}

.reader-prompts p {
  margin: 0;
  font-family: var(--serif);
  font-size: 0.94rem;
  line-height: 1.45;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--paper-100);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

.community-section {
  background: var(--ink-1000);
}

.discord-preview {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) 180px;
  min-height: 470px;
  overflow: hidden;
  background: var(--ink-900);
  border-radius: 18px;
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 34px 80px oklch(0 0 0 / 0.34);
}

.discord-rail {
  display: grid;
  align-content: start;
  gap: 5px;
  padding: 20px 12px;
  background: oklch(0.155 0.014 26);
  box-shadow: 1px 0 0 var(--line-soft);
}

.discord-channel {
  min-height: 44px;
  padding: 0 12px;
  color: var(--paper-400);
  font-size: 0.77rem;
  text-align: start;
  background: transparent;
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  transition-property: color, background-color, transform;
  transition-duration: 180ms;
}

.discord-channel span {
  margin-inline-end: 6px;
  color: var(--red-400);
  font-family: var(--mono);
}

.discord-channel:hover,
.discord-channel:focus-visible,
.discord-channel.is-active {
  color: var(--paper-50);
  background: oklch(1 0 0 / 0.07);
}

.discord-channel:active {
  transform: scale(0.96);
}

.discord-room {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.room-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 68px;
  padding: 0 22px;
  box-shadow: 0 1px 0 var(--line-soft);
}

.room-heading > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.room-heading span {
  color: var(--red-400);
  font-family: var(--mono);
  font-weight: 800;
}

.room-heading strong {
  font-size: 0.86rem;
}

.room-heading small {
  color: var(--paper-400);
  font-family: var(--serif);
  font-size: 0.72rem;
  text-align: end;
}

.room-message {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  margin-top: 56px;
  padding: 0 22px;
}

.message-avatar {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--white);
  font-family: var(--serif);
  font-size: 0.72rem;
  background: var(--red-500);
  border-radius: 50%;
}

.room-message p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.55;
}

.room-message p:first-child {
  margin-bottom: 5px;
}

.room-message strong {
  color: var(--paper-50);
}

.room-message time {
  margin-inline-start: 8px;
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.57rem;
}

.room-prompt {
  margin: auto 22px 22px;
  padding: 18px;
  background: oklch(1 0 0 / 0.045);
  border-radius: 11px;
  box-shadow: inset 0 0 0 1px var(--line-soft);
}

.room-prompt span {
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.room-prompt p {
  margin: 8px 0 0;
  color: var(--paper-100);
  font-family: var(--serif);
  line-height: 1.45;
}

.discord-members {
  padding: 22px 16px;
  background: oklch(0.155 0.014 26);
  box-shadow: -1px 0 0 var(--line-soft);
}

.discord-members > p {
  margin: 0 0 16px;
  color: var(--paper-400);
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.discord-members ul {
  display: grid;
  gap: 15px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.discord-members li {
  display: grid;
  grid-template-columns: 9px 1fr;
  gap: 2px 9px;
  align-items: center;
}

.member-dot {
  grid-row: 1 / 3;
  width: 7px;
  height: 7px;
  background: var(--paper-400);
  border-radius: 50%;
}

.member-dot.is-live {
  background: var(--green-400);
  box-shadow: 0 0 10px oklch(0.72 0.15 145 / 0.6);
}

.discord-members span {
  font-size: 0.73rem;
}

.discord-members small {
  color: var(--paper-400);
  font-size: 0.63rem;
}

.community-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 18px;
  padding: 30px;
  background: var(--ink-900);
  border-radius: 12px;
  box-shadow: inset 0 0 0 1px var(--line-soft);
}

.community-cta h3 {
  margin: 0;
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.community-cta p:not(.eyebrow) {
  margin: 7px 0 0;
  color: var(--paper-400);
  font-family: var(--serif);
  line-height: 1.45;
}

.study-pulse {
  padding: 24px 18px;
  background: oklch(0.145 0.014 26 / 0.72);
  box-shadow: -1px 0 0 var(--line-soft);
  backdrop-filter: blur(14px);
}

.pulse-card {
  display: grid;
  gap: 8px;
  padding: 18px;
  background: oklch(1 0 0 / 0.035);
  border-radius: 11px;
  box-shadow: inset 0 0 0 1px var(--line-soft);
}

.pulse-card + .pulse-card {
  margin-top: 10px;
}

.pulse-label {
  margin: 0;
  color: var(--red-400);
  font-family: var(--mono);
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pulse-card strong {
  color: var(--paper-50);
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 600;
}

.pulse-card > span {
  color: var(--paper-400);
  font-size: 0.7rem;
  line-height: 1.4;
}

.pulse-meter {
  display: flex;
  align-items: end;
  gap: 3px;
  height: 22px;
  margin-top: 6px;
}

.pulse-meter i {
  width: 4px;
  height: 30%;
  background: var(--red-400);
  animation: pulse-wave 1.3s ease-in-out infinite alternate;
}

.pulse-meter i:nth-child(2) {
  height: 70%;
  animation-delay: 100ms;
}

.pulse-meter i:nth-child(3) {
  height: 100%;
  animation-delay: 200ms;
}

.pulse-meter i:nth-child(4) {
  height: 55%;
  animation-delay: 300ms;
}

.pulse-meter i:nth-child(5) {
  height: 80%;
  animation-delay: 400ms;
}

@keyframes pulse-wave {
  to {
    transform: scaleY(0.45);
  }
}

.pulse-save {
  justify-self: start;
  min-height: 38px;
  padding: 0;
  color: var(--paper-200);
}

.pulse-card-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 40px;
  color: var(--paper-200);
  font-size: 0.7rem;
  text-decoration: none;
  box-shadow: 0 1px 0 var(--line-soft);
}

.pulse-quote {
  margin: 26px 5px 0;
  color: var(--paper-400);
  font-family: var(--serif);
  font-size: 0.78rem;
  font-style: italic;
  line-height: 1.55;
}

.study-footer {
  display: none;
}

@media (max-width: 1240px) {
  .study-shell {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .study-pulse {
    display: none;
  }
}

@media (max-width: 900px) {
  .header-status {
    display: none;
  }

  .mobile-nav-toggle {
    display: grid;
  }

  body.nav-open {
    overflow: hidden;
  }

  body.nav-open .mobile-nav-toggle > span:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  body.nav-open .mobile-nav-toggle > span:nth-child(2) {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .study-shell {
    display: block;
  }

  .study-sidebar {
    position: fixed;
    z-index: 90;
    inset: var(--header-height) 0 0 auto;
    width: min(86vw, 330px);
    height: calc(100vh - var(--header-height));
    transform: translateX(105%);
    transition-property: transform;
    transition-duration: 240ms;
    transition-timing-function: cubic-bezier(0.2, 0, 0, 1);
  }

  body.nav-open .study-sidebar {
    transform: translateX(0);
  }

  .welcome-panel {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 86px;
  }

  .frequency-board {
    width: min(100%, 620px);
    transform: none;
  }

  .ecosystem-grid,
  .class-grid,
  .notes-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ecosystem-card,
  .ecosystem-card:nth-child(4),
  .ecosystem-card:nth-child(5) {
    grid-column: span 1;
  }

  .ecosystem-card-featured,
  .class-card-featured {
    grid-column: 1 / -1;
  }

  .discord-preview {
    grid-template-columns: 190px minmax(0, 1fr);
  }

  .discord-members {
    display: none;
  }
}

@media (max-width: 640px) {
  .newsletter-gate {
    align-items: end;
    padding: 12px;
  }

  .newsletter-card {
    max-height: calc(100dvh - 24px);
    padding: 28px 20px 24px;
    overflow-y: auto;
    border-radius: 22px;
  }

  .newsletter-kicker {
    margin-bottom: 36px;
    padding-right: 44px;
  }

  .newsletter-copy h2 {
    font-size: clamp(2.4rem, 12vw, 3.5rem);
  }

  .newsletter-field {
    grid-template-columns: 1fr;
    padding: 7px;
    border-radius: 15px;
  }

  .newsletter-field button {
    width: 100%;
  }

  .study-header {
    padding-inline: 14px;
  }

  .study-brand small {
    display: none;
  }

  .welcome-panel,
  .ecosystem-section,
  .path-section,
  .classes-section,
  .notes-section,
  .reading-section,
  .community-section {
    padding: 58px 20px;
  }

  .welcome-copy h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  .welcome-actions,
  .reading-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .frequency-board {
    padding: 26px;
    border-radius: 12px;
  }

  .frequency-board blockquote {
    margin-block: 58px 30px;
  }

  .section-heading,
  .notes-heading,
  .community-cta {
    align-items: stretch;
    flex-direction: column;
  }

  .notes-heading {
    gap: 24px;
  }

  .note-search {
    width: 100%;
  }

  .path-check {
    grid-template-columns: 26px 34px minmax(0, 1fr);
    gap: 10px;
  }

  .path-time {
    display: none;
  }

  .ecosystem-grid,
  .class-grid,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  .ecosystem-card,
  .ecosystem-card:nth-child(4),
  .ecosystem-card:nth-child(5),
  .ecosystem-card-featured,
  .class-card-featured {
    grid-column: auto;
  }

  .ecosystem-card,
  .class-card {
    min-height: 430px;
  }

  .reading-section {
    grid-template-columns: 1fr;
  }

  .reading-cover {
    justify-self: center;
    width: min(78vw, 320px);
  }

  .discord-preview {
    display: block;
    min-height: 0;
  }

  .discord-rail {
    display: flex;
    padding: 10px;
    overflow-x: auto;
  }

  .discord-channel {
    flex: 0 0 auto;
  }

  .room-heading {
    align-items: start;
    flex-direction: column;
    justify-content: center;
    min-height: 82px;
  }

  .room-heading small {
    text-align: start;
  }

  .discord-room {
    min-height: 390px;
  }

  .community-cta .button {
    width: 100%;
  }

  .study-footer {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 30px 20px;
    color: var(--paper-400);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.06em;
    text-align: center;
    text-transform: uppercase;
    background: var(--ink-1000);
    box-shadow: 0 -1px 0 var(--line-soft);
  }

  .study-footer p {
    margin: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }

  .newsletter-gate.is-exiting,
  .newsletter-gate.is-exiting .newsletter-card,
  .newsletter-gate.is-confirmed .newsletter-signal {
    animation: none !important;
  }
}