@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "League Spartan";
  src: url("fonts/league-spartan-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --acid: #d8df43;
  --acid-bright: #eef36b;
  --forest: #003c34;
  --forest-deep: #002d27;
  --forest-soft: #075b4e;
  --ink: #14231f;
  --muted: #60716b;
  --canvas: #f3f5f1;
  --paper: #ffffff;
  --sand: #f1eee7;
  --line: #d6dfda;
  --line-dark: rgba(255, 255, 255, 0.14);
  --shadow: 0 24px 70px rgba(0, 60, 52, 0.1);
  --shell: min(1180px, calc(100vw - 64px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font: 400 16px/1.55 "Inter", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  color: inherit;
  font: inherit;
}

[hidden] {
  display: none !important;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "League Spartan", Arial, sans-serif;
  letter-spacing: -0.028em;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

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

.eyebrow {
  margin: 0 0 9px;
  color: var(--forest-soft);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow--light {
  color: var(--acid);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--forest);
  background: var(--acid-bright);
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 850;
  transform: translateY(-160%);
  transition: transform 0.16s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  color: white;
  background: rgba(0, 45, 39, 0.96);
  border-bottom: 1px solid var(--line-dark);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand img {
  width: 102px;
  height: auto;
  display: block;
}

.brand > span {
  padding-left: 14px;
  display: grid;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  line-height: 1.05;
}

.brand small {
  color: #bad0ca;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand strong {
  margin-top: 2px;
  font-family: "League Spartan", Arial, sans-serif;
  font-size: 1.02rem;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.78rem;
  font-weight: 750;
}

.header-meta > span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #c7d8d3;
}

.header-meta i {
  width: 7px;
  height: 7px;
  background: var(--acid);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(216, 223, 67, 0.12);
}

.header-meta a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--acid-bright);
}

.hero {
  position: relative;
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 82% 12%, rgba(20, 132, 111, 0.62), transparent 32%),
    linear-gradient(120deg, var(--forest-deep) 0%, var(--forest) 58%, #07574a 100%);
}

.hero::before {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(90deg, transparent 49.7%, white 50%, transparent 50.3%),
    linear-gradient(transparent 49.7%, white 50%, transparent 50.3%);
  background-size: 132px 132px;
  mask-image: radial-gradient(circle at 80% 45%, black, transparent 47%);
  content: "";
}

.hero-grid {
  position: relative;
  z-index: 1;
  min-height: 510px;
  padding: 70px 0 76px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.72fr);
  gap: 78px;
  align-items: center;
}

.hero-copy h1 {
  max-width: 750px;
  margin-bottom: 22px;
  font-size: clamp(3.7rem, 6.4vw, 5.7rem);
  font-weight: 680;
  line-height: 0.91;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 650px;
  margin-bottom: 0;
  color: #c8d9d4;
  font-size: 1.06rem;
}

.hero-action {
  width: fit-content;
  min-height: 50px;
  margin-top: 28px;
  padding: 0 19px;
  display: inline-flex;
  align-items: center;
  gap: 26px;
  color: var(--forest-deep);
  background: var(--acid);
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 850;
}

.hero-action span {
  font-size: 1.15rem;
}

.hero-summary {
  padding: 26px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 22px;
  box-shadow: 0 24px 70px rgba(0, 22, 19, 0.2);
  backdrop-filter: blur(14px);
}

.hero-summary__head {
  display: grid;
  gap: 4px;
}

.hero-summary__head span {
  color: var(--acid);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-summary__head strong {
  font: 700 1.55rem/1.05 "League Spartan", Arial, sans-serif;
}

.hero-summary ol {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-summary li {
  min-height: 62px;
  padding: 11px 0;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 13px;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.hero-summary li > span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--forest-deep);
  background: var(--acid);
  border-radius: 9px;
  font-size: 0.7rem;
  font-weight: 900;
}

.hero-summary li div {
  display: grid;
}

.hero-summary li strong {
  font-size: 0.9rem;
}

.hero-summary li small {
  color: #b7cbc5;
  font-size: 0.76rem;
}

.learning-hub {
  padding: 72px 0 96px;
  scroll-margin-top: 76px;
}

.workspace-heading {
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: end;
}

.workspace-heading h2 {
  margin-bottom: 0;
  color: var(--forest);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  line-height: 0.95;
}

.workspace-heading > p {
  margin-bottom: 4px;
  color: var(--muted);
}

.module-tabs {
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  background: #e8ede9;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.module-tab {
  min-width: 0;
  min-height: 98px;
  padding: 15px;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  text-align: left;
  color: var(--ink);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 13px;
  cursor: pointer;
  transition: color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.module-tab:hover {
  background: rgba(255, 255, 255, 0.68);
}

.module-tab > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 9px;
  font-size: 0.7rem;
  font-weight: 900;
}

.module-tab div {
  min-width: 0;
  display: grid;
}

.module-tab strong {
  font-size: 0.88rem;
  line-height: 1.25;
}

.module-tab small {
  margin-top: 3px;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.module-tab > b {
  color: var(--forest-soft);
  font-size: 1.05rem;
}

.module-tab.is-active {
  color: white;
  background: var(--forest);
  box-shadow: 0 12px 30px rgba(0, 60, 52, 0.17);
}

.module-tab.is-active small {
  color: #bcd0ca;
}

.module-tab.is-active > b {
  color: var(--acid);
}

.process-strip {
  margin-top: 14px;
  padding: 20px 22px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  align-items: center;
  color: white;
  background: var(--forest-deep);
  border-radius: 16px;
}

.process-strip > div {
  display: grid;
}

.process-strip > div span {
  color: var(--acid);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.process-strip > div strong {
  margin-top: 3px;
  font-size: 0.88rem;
}

.process-strip ol {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  list-style: none;
}

.process-strip li {
  position: relative;
  display: grid;
  justify-items: center;
  color: #c4d5d0;
  font-size: 0.72rem;
  font-weight: 700;
  text-align: center;
}

.process-strip li::before {
  position: absolute;
  top: 15px;
  right: 50%;
  left: -50%;
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  content: "";
}

.process-strip li:first-child::before {
  display: none;
}

.process-strip li > span {
  z-index: 1;
  width: 31px;
  height: 31px;
  margin-bottom: 6px;
  display: grid;
  place-items: center;
  color: var(--forest-deep);
  background: var(--acid);
  border-radius: 50%;
  font-size: 0.68rem;
  font-weight: 900;
}

.lesson-stage {
  margin-top: 22px;
}

.lesson-panel {
  padding: clamp(24px, 4.4vw, 48px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  animation: panel-in 0.22s ease;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.lesson-heading {
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.lesson-heading h2 {
  margin-bottom: 0;
  color: var(--forest);
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 0.94;
}

.duration {
  flex: none;
  padding: 7px 11px;
  color: var(--acid-bright);
  background: var(--forest);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 850;
}

.lesson-intro {
  max-width: 780px;
  margin-bottom: 22px;
  color: var(--muted);
}

.use-when {
  margin-bottom: 22px;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 16px;
  align-items: center;
  background: #f7f8ef;
  border: 1px solid #e1e5bd;
  border-radius: 13px;
}

.use-when span {
  color: var(--forest-soft);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.use-when p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 0.9rem;
}

.video-frame {
  overflow: hidden;
  margin: 20px 0;
  background: #001d19;
  border: 1px solid #0a4c42;
  border-radius: 16px;
  box-shadow: 0 18px 42px rgba(0, 45, 39, 0.18);
}

.video-frame--covered {
  position: relative;
}

.video-cover {
  position: absolute;
  inset: 0;
  z-index: 3;
  width: 100%;
  padding: clamp(22px, 3.2vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(250px, 0.86fr);
  gap: clamp(28px, 4.2vw, 56px);
  align-items: stretch;
  overflow: hidden;
  text-align: left;
  color: white;
  background:
    radial-gradient(circle at 88% 12%, rgba(216, 223, 67, 0.17), transparent 28%),
    linear-gradient(145deg, #003b33 0%, var(--forest-deep) 72%);
  border: 0;
  cursor: pointer;
}

.video-cover::before {
  position: absolute;
  inset: 0 0 auto;
  z-index: 4;
  height: 5px;
  background: linear-gradient(90deg, var(--acid) 0 30%, rgba(216, 223, 67, 0.18) 30% 100%);
  content: "";
}

.video-cover:focus-visible {
  outline: 4px solid var(--acid);
  outline-offset: -4px;
}

.video-cover__content {
  position: relative;
  z-index: 2;
  min-width: 0;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
}

.video-cover__brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
}

.video-cover__brand > span {
  padding-left: 13px;
  display: grid;
  color: rgba(255, 255, 255, 0.68);
  border-left: 1px solid rgba(255, 255, 255, 0.24);
  font-size: clamp(0.65rem, 0.9vw, 0.78rem);
  font-weight: 650;
  line-height: 1.05;
}

.video-cover__brand > span strong {
  color: white;
}

.video-cover__logo {
  width: clamp(76px, 8.2vw, 102px);
  height: auto;
  display: block;
}

.video-cover__meta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.64);
  font-size: clamp(0.66rem, 0.9vw, 0.78rem);
  font-weight: 750;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
}

.video-cover__meta b {
  color: var(--acid);
}

.video-cover__meta span {
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.video-cover__content > strong {
  margin-top: 12px;
  font: 720 clamp(2.1rem, 4.7vw, 4.25rem) / 0.9 "League Spartan", Arial, sans-serif;
  letter-spacing: -0.035em;
}

.video-cover__summary {
  margin-top: 11px;
  color: rgba(255, 255, 255, 0.72);
  font-size: clamp(0.77rem, 1.1vw, 0.94rem);
  line-height: 1.35;
}

.video-cover__play {
  min-height: 44px;
  margin-top: auto;
  padding: 0 16px 0 7px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--forest-deep);
  background: white;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(0, 20, 17, 0.24);
  font-size: 0.78rem;
  font-weight: 850;
  transition: transform 0.2s ease, background 0.2s ease;
}

.video-cover:hover .video-cover__play {
  background: var(--acid-bright);
  transform: translateY(-2px);
}

.video-cover__play i {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--acid);
  border-radius: 50%;
}

.video-cover__play i::before {
  width: 0;
  height: 0;
  margin-left: 3px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--forest);
  content: "";
}

.video-cover__number {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 88%;
  align-self: center;
  display: grid;
  grid-template-rows: auto 1fr auto;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(rgba(216, 223, 67, 0.05), rgba(216, 223, 67, 0)),
    rgba(0, 31, 26, 0.34);
  border: 1px solid rgba(216, 223, 67, 0.32);
  border-radius: 18px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 22px 48px rgba(0, 22, 18, 0.24);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.video-cover__number::before {
  position: absolute;
  inset: 11% 13%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  content: "";
}

.video-cover__number small,
.video-cover__number > span {
  position: relative;
  z-index: 2;
  color: rgba(255, 255, 255, 0.62);
  font-size: clamp(0.65rem, 0.9vw, 0.78rem);
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.video-cover__number small {
  margin-top: 22px;
}

.video-cover__number > strong {
  position: relative;
  z-index: 1;
  color: transparent;
  font: 760 clamp(8.5rem, 19vw, 16rem) / 0.72 "League Spartan", Arial, sans-serif;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 2px rgba(216, 223, 67, 0.76);
}

.video-cover__number > span {
  width: calc(100% - 44px);
  margin-bottom: 22px;
  padding-top: 13px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.video-cover__number::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(125deg, transparent 45%, rgba(216, 223, 67, 0.055) 45% 55%, transparent 55%);
  content: "";
}

.video-cover:hover .video-cover__number {
  background: rgba(0, 31, 26, 0.48);
  border-color: rgba(216, 223, 67, 0.72);
  transform: translateY(-3px);
}

.video-frame video {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  background: #001d19;
  object-fit: contain;
}

.video-speed {
  margin: -8px 0 20px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #f7f9f7;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.video-speed__label {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.video-speed__label strong {
  color: var(--forest);
  font-size: 0.82rem;
}

.video-speed__label small {
  color: var(--muted);
  font-size: 0.7rem;
}

.video-speed__options {
  padding: 4px;
  display: flex;
  gap: 4px;
  background: #e8efeb;
  border-radius: 10px;
}

.video-speed__options button {
  min-width: 54px;
  min-height: 44px;
  padding: 0 9px;
  color: var(--forest-soft);
  background: transparent;
  border: 0;
  border-radius: 8px;
  font: 800 0.76rem / 1 "Inter", Arial, sans-serif;
  cursor: pointer;
  touch-action: manipulation;
}

.video-speed__options button:hover {
  background: rgba(255, 255, 255, 0.72);
}

.video-speed__options button.is-active {
  color: white;
  background: var(--forest);
  box-shadow: 0 5px 12px rgba(0, 60, 52, 0.18);
}

.path {
  margin: 20px 0;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  align-items: center;
  background: #edf2ef;
  border: 1px solid var(--line);
  border-radius: 13px;
}

.path > span {
  color: var(--forest-soft);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.path div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
}

.path b {
  color: #92a69f;
}

.steps {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
}

.steps li {
  min-height: 132px;
  padding: 18px;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 13px;
  align-items: start;
  background: #fbfcfb;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.step-number {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 9px;
  font-size: 0.7rem;
  font-weight: 900;
}

.steps h3 {
  margin-bottom: 4px;
  color: var(--forest);
  font-size: 1.03rem;
  line-height: 1.1;
}

.steps p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.87rem;
  line-height: 1.5;
}

.system-note {
  margin: 2px 0 22px;
  padding: 17px 18px;
  display: grid;
  grid-template-columns: 185px 1fr;
  gap: 18px;
  color: var(--forest);
  background: #f2f5c9;
  border: 1px solid #d8de7e;
  border-radius: 14px;
}

.system-note > span {
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.system-note p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.multiples-jump {
  width: 100%;
  margin: 2px 0 14px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: white;
  text-align: left;
  background: var(--forest-soft);
  border: 0;
  border-radius: 14px;
  cursor: pointer;
}

.multiples-jump span {
  display: grid;
  gap: 2px;
}

.multiples-jump small {
  color: var(--acid-bright);
  font-size: 0.67rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.multiples-jump strong {
  font-size: 0.92rem;
}

.multiples-jump > b {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 50%;
  transition: transform 0.18s ease;
}

.multiples-jump:hover > b {
  transform: translateY(2px);
}

.multiples-guide {
  margin: 24px 0;
  padding: 24px;
  background: #f7f9f7;
  border: 1px solid var(--line);
  border-radius: 18px;
  scroll-margin-top: 92px;
  outline: none;
}

.multiples-guide:focus-visible {
  box-shadow: 0 0 0 4px rgba(216, 223, 67, 0.48);
}

.multiples-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.72fr);
  gap: 30px;
  align-items: end;
}

.multiples-heading h3 {
  margin-bottom: 0;
  color: var(--forest);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 0.96;
}

.multiples-heading > p {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 0.9rem;
}

.multiples-example {
  margin: 20px 0 14px;
  padding: 13px 15px;
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 14px;
  color: white;
  background: var(--forest);
  border-radius: 12px;
}

.multiples-example > span {
  color: var(--acid);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.multiples-example p {
  margin-bottom: 0;
  font-size: 0.84rem;
}

.multiples-groups {
  display: grid;
  gap: 8px;
}

.multiples-group {
  overflow: hidden;
  background: white;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.multiples-group summary {
  min-height: 58px;
  padding: 13px 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 30px;
  gap: 12px;
  align-items: center;
  color: var(--forest);
  cursor: pointer;
  list-style: none;
}

.multiples-group summary::-webkit-details-marker {
  display: none;
}

.multiples-group summary::after {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 50%;
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1;
  content: "+";
}

.multiples-group[open] summary::after {
  content: "−";
}

.multiples-group summary:focus-visible {
  outline: 3px solid var(--acid);
  outline-offset: -3px;
}

.multiples-group summary span {
  font-family: "League Spartan", Arial, sans-serif;
  font-size: 1.1rem;
  font-weight: 750;
}

.multiples-group summary small {
  color: var(--muted);
  font-size: 0.73rem;
}

.multiples-table-wrap {
  border-top: 1px solid var(--line);
}

.multiples-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.multiples-table th,
.multiples-table td {
  padding: 12px 14px;
  vertical-align: middle;
  text-align: left;
  border-bottom: 1px solid #e7ece9;
}

.multiples-table tr:last-child > * {
  border-bottom: 0;
}

.multiples-table thead th {
  color: var(--forest-soft);
  background: #edf2ef;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.multiples-table thead th:first-child {
  width: 51%;
}

.multiples-table thead th:nth-child(2) {
  width: 19%;
}

.multiples-table tbody th {
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 700;
}

.multiples-table tbody td {
  color: var(--muted);
  font-size: 0.82rem;
}

.multiples-table td:last-child strong,
.multiples-table td:last-child small {
  display: block;
}

.multiples-table td:last-child strong {
  color: var(--forest);
  font-size: 0.88rem;
}

.multiples-table td:last-child small {
  margin-top: 1px;
  color: var(--muted);
  font-size: 0.69rem;
}

.result-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.result-card {
  min-height: 100px;
  padding: 16px;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  align-items: start;
  background: #f7f9f7;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.result-card > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 50%;
  font-weight: 900;
}

.result-card--attention > span {
  color: white;
  background: var(--forest-soft);
}

.result-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.result-card p strong {
  display: block;
  margin-bottom: 3px;
  color: var(--forest);
  font-size: 0.82rem;
}

.next-module {
  width: 100%;
  min-height: 66px;
  margin-top: 18px;
  padding: 13px 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  color: white;
  background: var(--forest);
  border: 0;
  border-radius: 14px;
  cursor: pointer;
}

.next-module > span {
  color: #b9cec8;
  font-size: 0.75rem;
}

.next-module strong {
  text-align: right;
}

.next-module b {
  margin-left: 10px;
  color: var(--acid);
}

.rule-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 17px;
  overflow: hidden;
}

.rule-grid article {
  min-height: 190px;
  padding: 22px;
  background: #fbfcfb;
}

.rule-grid article:nth-child(even) {
  border-left: 1px solid var(--line);
}

.rule-grid article:nth-child(n + 3) {
  border-top: 1px solid var(--line);
}

.rule-grid article > span {
  color: var(--forest-soft);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.rule-grid h3 {
  margin: 18px 0 7px;
  color: var(--forest);
  font-size: 1.45rem;
  line-height: 1;
}

.rule-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.document-card {
  margin-top: 14px;
  padding: 22px;
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 26px;
  color: white;
  background: var(--forest-deep);
  border-radius: 16px;
}

.document-card > div {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 13px;
  align-items: start;
}

.document-card > div > span {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 10px;
  font-weight: 900;
}

.document-card p {
  margin: 0 0 4px;
  color: var(--acid);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.document-card h3 {
  margin-bottom: 0;
  font-size: 1.3rem;
  line-height: 1.05;
}

.document-card ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
  color: #d4e1dd;
  font-size: 0.84rem;
}

.document-card li::marker {
  color: var(--acid);
}

.status-block {
  margin-top: 34px;
}

.status-heading h3 {
  margin-bottom: 18px;
  color: var(--forest);
  font-size: 2rem;
  line-height: 1;
}

.status-list {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 9px;
  counter-reset: status;
  list-style: none;
}

.status-list li {
  min-height: 150px;
  padding: 17px;
  counter-increment: status;
  background: #fbfcfb;
  border: 1px solid var(--line);
  border-radius: 13px;
}

.status-list li::before {
  width: 32px;
  height: 32px;
  margin-bottom: 18px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: var(--acid);
  border-radius: 8px;
  content: counter(status, decimal-leading-zero);
  font-size: 0.68rem;
  font-weight: 900;
}

.status-list strong,
.status-list span {
  display: block;
}

.status-list strong {
  margin-bottom: 4px;
  color: var(--forest);
  font-size: 0.88rem;
}

.status-list span {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.site-footer {
  color: white;
  background: var(--forest-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer .shell {
  min-height: 116px;
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand img {
  width: 94px;
  height: auto;
}

.footer-brand span {
  padding-left: 14px;
  color: #c0d2cd;
  border-left: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 0.78rem;
}

.site-footer p {
  margin-bottom: 0;
  color: #a9c0ba;
  font-size: 0.78rem;
}

:where(a, button, video):focus:not(:focus-visible) {
  outline: none;
}

:where(a, button, video):focus-visible {
  outline: 3px solid var(--acid);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero-summary {
    max-width: 720px;
  }

  .workspace-heading {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .workspace-heading > p {
    max-width: 620px;
  }

  .module-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .status-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(100% - 28px, 660px);
  }

  html {
    scroll-padding-top: 76px;
  }

  .header-inner {
    min-height: 64px;
  }

  .brand {
    gap: 10px;
  }

  .brand img {
    width: 84px;
  }

  .brand > span {
    padding-left: 10px;
  }

  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 0.9rem;
  }

  .header-meta > span {
    display: none;
  }

  .header-meta a {
    font-size: 0.72rem;
  }

  .hero-grid {
    min-height: auto;
    padding: 52px 0 58px;
    gap: 34px;
  }

  .hero-copy h1 {
    margin-bottom: 18px;
    font-size: clamp(3rem, 15vw, 4.15rem);
  }

  .hero-copy > p:not(.eyebrow) {
    font-size: 0.95rem;
  }

  .hero-action {
    width: 100%;
    justify-content: space-between;
  }

  .hero-summary {
    padding: 20px;
  }

  .hero-summary ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 14px;
  }

  .hero-summary li {
    grid-template-columns: 34px 1fr;
  }

  .hero-summary li > span {
    width: 32px;
    height: 32px;
  }

  .learning-hub {
    padding: 46px 0 66px;
  }

  .workspace-heading h2 {
    font-size: 3rem;
  }

  .module-tabs {
    padding: 6px;
    gap: 6px;
  }

  .module-tab {
    min-height: 96px;
    padding: 12px;
    grid-template-columns: 31px minmax(0, 1fr);
    gap: 9px;
  }

  .module-tab > span {
    width: 30px;
    height: 30px;
  }

  .module-tab > b {
    display: none;
  }

  .module-tab strong {
    font-size: 0.88rem;
  }

  .module-tab small {
    font-size: 0.75rem;
    white-space: normal;
    line-height: 1.3;
  }

  .process-strip {
    padding: 18px;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process-strip ol {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 4px;
  }

  .process-strip li {
    min-width: 0;
    justify-items: center;
    font-size: 0.75rem;
    line-height: 1.25;
    text-align: center;
  }

  .process-strip li::before {
    top: 13px;
    display: block;
  }

  .process-strip li:first-child::before {
    display: none;
  }

  .process-strip li > span {
    width: 27px;
    height: 27px;
  }

  .lesson-panel {
    padding: 22px 16px;
    border-radius: 18px;
  }

  .lesson-heading {
    align-items: flex-start;
  }

  .lesson-heading h2 {
    font-size: 2.65rem;
  }

  .use-when,
  .path,
  .system-note {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .multiples-jump {
    padding: 13px 14px;
  }

  .multiples-guide {
    margin-right: -8px;
    margin-left: -8px;
    padding: 20px 12px;
    border-radius: 15px;
  }

  .multiples-heading {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .multiples-heading h3 {
    font-size: 2.35rem;
  }

  .multiples-example {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .multiples-group summary {
    min-height: 56px;
    padding: 12px;
    grid-template-columns: minmax(0, 1fr) 28px;
    gap: 8px;
  }

  .multiples-group summary small {
    display: none;
  }

  .multiples-table,
  .multiples-table tbody,
  .multiples-table tr,
  .multiples-table th,
  .multiples-table td {
    display: block;
    width: 100%;
  }

  .multiples-table thead {
    display: none;
  }

  .multiples-table tr {
    padding: 13px 12px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 9px 12px;
    border-bottom: 1px solid #e2e9e5;
  }

  .multiples-table tr:last-child {
    border-bottom: 0;
  }

  .multiples-table th,
  .multiples-table td {
    padding: 0;
    border: 0;
  }

  .multiples-table tbody th {
    grid-column: 1 / -1;
    font-size: 0.9rem;
  }

  .multiples-table td::before {
    display: block;
    margin-bottom: 2px;
    color: var(--forest-soft);
    font-size: 0.59rem;
    font-weight: 900;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    content: attr(data-label);
  }

  .multiples-table tbody td,
  .multiples-table td:last-child strong {
    font-size: 0.78rem;
  }

  .multiples-table td:last-child small {
    font-size: 0.76rem;
    line-height: 1.45;
  }

  .video-frame {
    margin-right: -16px;
    margin-left: -16px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .video-speed {
    margin-top: -8px;
    align-items: stretch;
    flex-direction: column;
    gap: 8px;
  }

  .video-speed__options {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .video-speed__options button {
    min-width: 0;
  }

  .video-cover {
    padding: 12px;
    grid-template-columns: minmax(0, 1.28fr) minmax(104px, 0.72fr);
    gap: 12px;
  }

  .video-cover::before {
    height: 3px;
  }

  .video-cover__content {
    inset: auto;
    width: auto;
  }

  .video-cover__brand {
    gap: 0;
  }

  .video-cover__brand > span {
    display: none;
  }

  .video-cover__logo {
    width: 58px;
  }

  .video-cover__meta {
    margin-top: 8px;
    flex-wrap: wrap;
    gap: 5px;
    font-size: 0.54rem;
    letter-spacing: 0.045em;
  }

  .video-cover__meta span {
    padding-left: 6px;
  }

  .video-cover__content > strong {
    margin-top: 6px;
    font-size: clamp(1.62rem, 7.35vw, 1.92rem);
    line-height: 0.88;
  }

  .video-cover__summary {
    display: none;
  }

  .video-cover__play {
    min-height: 34px;
    padding-right: 12px;
    gap: 7px;
    font-size: 0.66rem;
  }

  .video-cover__play i {
    width: 25px;
    height: 25px;
  }

  .video-cover__number {
    height: 100%;
    border-radius: 11px;
  }

  .video-cover__number::before {
    inset: 19% 9%;
  }

  .video-cover__number small {
    margin-top: 11px;
    font-size: 0.48rem;
  }

  .video-cover__number > strong {
    font-size: clamp(5.2rem, 25vw, 6.4rem);
    -webkit-text-stroke-width: 1.5px;
  }

  .video-cover__number > span {
    width: calc(100% - 20px);
    margin-bottom: 10px;
    padding-top: 7px;
    font-size: 0.48rem;
  }

  .steps,
  .result-grid,
  .rule-grid,
  .status-list {
    grid-template-columns: 1fr;
  }

  .steps li {
    min-height: auto;
    padding: 16px;
  }

  .result-card {
    min-height: auto;
  }

  .next-module {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .next-module strong {
    text-align: left;
  }

  .rule-grid article {
    min-height: auto;
  }

  .rule-grid article:nth-child(even) {
    border-left: 0;
  }

  .rule-grid article + article {
    border-top: 1px solid var(--line);
  }

  .document-card {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .document-card ul {
    grid-template-columns: 1fr;
  }

  .status-list li {
    min-height: auto;
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 4px 12px;
  }

  .status-list li::before {
    grid-row: 1 / 3;
    margin-bottom: 0;
  }

  .site-footer .shell {
    padding: 28px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  .module-tabs {
    grid-template-columns: 1fr;
  }

  .module-tab {
    min-height: 72px;
    padding: 11px 12px;
    grid-template-columns: 34px minmax(0, 1fr) auto;
  }

  .module-tab > span {
    width: 32px;
    height: 32px;
  }

  .module-tab strong {
    font-size: 0.9rem;
  }

  .module-tab small {
    font-size: 0.76rem;
    line-height: 1.35;
  }

  .module-tab > b {
    display: block;
  }

  .process-strip {
    padding: 16px;
    gap: 14px;
  }

  .process-strip > div span {
    font-size: 0.72rem;
  }

  .process-strip > div strong {
    font-size: 0.92rem;
  }

  .process-strip ol {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .process-strip li {
    min-height: 44px;
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    justify-items: start;
    font-size: 0.82rem;
    line-height: 1.3;
    text-align: left;
  }

  .process-strip li::before {
    top: -14px;
    right: auto;
    bottom: 50%;
    left: 14px;
    width: 1px;
    height: auto;
  }

  .process-strip li > span {
    width: 29px;
    height: 29px;
    margin-bottom: 0;
  }
}

@media (max-width: 360px) {
  .video-cover__brand,
  .video-cover__meta {
    display: none;
  }

  .video-cover__content > strong {
    margin-top: 0;
  }
}

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

  .skip-link,
  .module-tab,
  .lesson-panel {
    transition: none;
    animation: none;
  }
}