.global-auth-wrap--landing,
.landing {
  --home-auth-bg: var(--color-home-auth-bg);
  --home-auth-border: var(--color-home-auth-border);
  --home-auth-signin: var(--color-home-auth-signin);
  --home-auth-create-bg: var(--color-home-auth-create-bg);
  --home-auth-create-text: var(--color-text-inverse);

  --home-hero-bg-start: var(--color-home-hero-bg-start);
  --home-hero-bg-end: var(--color-home-hero-bg-end);
  --home-hero-border: var(--color-home-hero-border);
  --home-hero-title: var(--color-home-hero-title);
  --home-hero-subtext: var(--color-home-hero-subtext);

  --home-progress-bg: var(--color-home-progress-bg);
  --home-progress-border: var(--color-home-progress-border);
  --home-progress-text: var(--color-home-progress-text);
  --home-progress-track: var(--color-home-progress-track);
  --home-progress-fill-start: var(--color-home-progress-fill-start);
  --home-progress-fill-end: var(--color-home-progress-fill-end);

  --home-button-main-start: var(--color-home-button-main-start);
  --home-button-main-end: var(--color-home-button-main-end);
  --home-button-main-border: var(--color-home-button-main-border);
  --home-button-main-text: var(--color-text-inverse);
  --home-button-alt-bg: var(--color-home-button-alt-bg);
  --home-button-alt-border: var(--color-home-button-alt-border);
  --home-button-alt-text: var(--color-home-button-alt-text);

  --home-lessons-shell-start: var(--color-home-lessons-shell-start);
  --home-lessons-shell-end: var(--color-home-lessons-shell-end);
  --home-lessons-shell-border: var(--color-home-lessons-shell-border);
  --home-lessons-title: var(--color-home-lessons-title);
  --home-lessons-subtext: var(--color-home-lessons-subtext);
  --home-lessons-meta: var(--color-home-lessons-meta);

  --home-bottom-banner-start: var(--color-home-bottom-banner-start);
  --home-bottom-banner-end: var(--color-home-bottom-banner-end);
  --home-bottom-banner-border: var(--color-home-bottom-banner-border);
  --home-bottom-banner-title: var(--color-home-bottom-banner-title);
  --home-bottom-banner-body: var(--color-home-bottom-banner-body);

  --home-resource-link: var(--color-home-resource-link);
  --home-resource-divider: var(--color-home-resource-divider);
}

.landing {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding: var(--space-2) 0 var(--space-7);
}

.global-auth-wrap--landing {
  width: 100%;
  margin-bottom: 0;
}

.global-auth-wrap--landing .global-auth {
  width: 100%;
  max-width: none;
  min-height: 56px;
  padding: 0 var(--space-4);
  border: 1px solid var(--home-auth-border);
  border-radius: 0;
  background: var(--home-auth-bg);
  box-shadow: 0 1px 8px
    color-mix(in srgb, var(--color-text-strong), transparent 91%);
}

.global-auth-wrap--landing .global-auth--guest {
  justify-content: space-between;
}

.global-auth-wrap--landing .global-auth-left {
  margin-right: 0;
}

.global-auth-wrap--landing .global-auth-link {
  font-size: var(--text-md);
  text-decoration: none;
  color: var(--home-auth-signin);
}

.global-auth-wrap--landing .global-auth-link--strong {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 0;
  background: var(--home-auth-create-bg);
  color: var(--home-auth-create-text);
}

.global-auth-wrap--landing .global-auth-link:hover {
  color: var(--home-auth-signin);
}

.global-auth-wrap--landing .global-auth-link--strong:hover {
  color: var(--home-auth-create-text);
  background: var(--color-home-auth-create-hover);
}

.landing-page-shell {
  width: min(100%, 1100px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.landing-section {
  width: 100%;
}

.landing-stage {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: stretch;
}

.landing-hero {
  margin-top: var(--space-4);
}

.landing-hero-shell {
  position: relative;
  display: block;
  padding: 0;
  min-height: 308px;
  container-type: inline-size;
  container-name: landing-hero;
  border-radius: 26px;
  border: 1px solid var(--home-hero-border);
  background: linear-gradient(
    180deg,
    var(--home-hero-bg-start) 0%,
    var(--home-hero-bg-end) 100%
  );
  box-shadow: 0 12px 32px
    color-mix(in srgb, var(--color-surface-dark), transparent 86%);
}

.landing-hero-copy {
  position: absolute;
  left: 48px;
  top: 50px;
  width: 640px;
}

.landing-hero h1 {
  font-size: 56px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0;
  font-weight: 700;
  color: var(--home-hero-title);
  max-width: none;
  white-space: nowrap;
}

html[lang="ru"] .landing-hero h1,
html[lang="uk"] .landing-hero h1,
html[lang="id"] .landing-hero h1 {
  white-space: normal;
  max-width: 560px;
  font-size: 48px;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero-subhead {
  font-size: var(--text-xl);
  color: var(--home-hero-subtext);
  line-height: 1.42;
  margin: 34px 0 0 28px;
  max-width: 560px;
  position: relative;
  padding-left: 0;
  font-weight: 450;
  letter-spacing: -0.005em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: var(--space-2);
}

.landing-auth-dialog {
  width: min(420px, 100%);
  text-align: center;
  padding: 0;
  position: relative;
}

.landing-auth-dialog--shell {
  width: min(480px, 100%);
  padding: 0 40px 40px;
  border-radius: 24px;
  border: 1px solid var(--auth-dialog-shell-border);
  background: linear-gradient(
    180deg,
    var(--auth-dialog-shell-gradient-start) 0%,
    var(--auth-dialog-shell-gradient-end) 100%
  );
  box-shadow: 0 20px 48px var(--auth-dialog-shell-shadow);
}

.landing-auth-dialog--shell .ds-auth-form {
  display: grid;
  row-gap: 16px;
  margin: 0;
}

.landing-auth-dialog--shell .ds-auth-form > * {
  margin: 0;
}

.landing-auth-dialog--shell .ds-dialog__emoji {
  width: auto;
  height: auto;
  margin: 24px auto 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--color-home-auth-create-bg);
  font-size: 52px;
  line-height: 1;
}

.landing-auth-dialog--shell .ds-dialog__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  color: var(--color-home-hero-title);
  font-size: 36px;
  font-weight: 800;
  line-height: 1.1;
  text-align: center;
}

.landing-auth-dialog--shell .ds-dialog__description {
  margin: 10px auto 28px;
  max-width: 360px;
  color: var(--auth-dialog-description-color);
  font-size: 15px;
  line-height: 1.4;
  text-align: center;
}

.landing-auth-dialog--shell .landing-auth-close.ds-dialog__close {
  top: 9px;
  right: 9px;
  width: 44px;
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: var(--auth-dialog-close-color);
  font-size: 0;
  line-height: 0;
}

.landing-auth-dialog--shell .landing-auth-close-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
}

.landing-auth-dialog--shell .landing-auth-close-icon::before,
.landing-auth-dialog--shell .landing-auth-close-icon::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 1px;
  width: 16px;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
}

.landing-auth-dialog--shell .landing-auth-close-icon::before {
  transform: rotate(45deg);
}

.landing-auth-dialog--shell .landing-auth-close-icon::after {
  transform: rotate(-45deg);
}

.landing-auth-dialog--shell .landing-auth-close.ds-dialog__close:hover,
.landing-auth-dialog--shell .landing-auth-close.ds-dialog__close:focus-visible {
  background: transparent;
  color: var(--auth-dialog-description-color);
}

.landing-auth-dialog--shell .ds-auth-email-input.ds-input,
.landing-auth-dialog--shell .ds-auth-code-input.ds-input {
  appearance: none;
  -webkit-appearance: none;
  box-shadow: none;
  border: 1px solid var(--auth-dialog-shell-border);
  border-radius: 12px;
  background: var(--auth-dialog-input-bg);
}

.landing-auth-dialog--shell .ds-auth-email-input.ds-input::placeholder {
  color: var(--auth-dialog-input-placeholder);
  font-size: 15px;
  opacity: 1;
}

.landing-auth-dialog--shell
  .ds-auth-email-input.ds-input::-webkit-credentials-auto-fill-button,
.landing-auth-dialog--shell
  .ds-auth-email-input.ds-input::-webkit-contacts-auto-fill-button,
.landing-auth-dialog--shell
  .ds-auth-email-input.ds-input::-webkit-textfield-decoration-container {
  display: none;
  visibility: hidden;
  pointer-events: none;
}

.landing-auth-dialog--shell .ds-auth-email-input.ds-input::-ms-clear,
.landing-auth-dialog--shell .ds-auth-email-input.ds-input::-ms-reveal {
  display: none;
}

.landing-auth-dialog--shell .ds-auth-email-input.ds-input:-webkit-autofill,
.landing-auth-dialog--shell
  .ds-auth-email-input.ds-input:-webkit-autofill:hover,
.landing-auth-dialog--shell
  .ds-auth-email-input.ds-input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--color-home-hero-title);
  border: 1px solid var(--auth-dialog-shell-border);
  -webkit-box-shadow: 0 0 0 1000px var(--auth-dialog-input-bg) inset;
  box-shadow: 0 0 0 1000px var(--auth-dialog-input-bg) inset;
  transition: background-color 9999s ease-out 0s;
}

.landing-auth-dialog--mode-login .ds-auth-email-input.ds-input,
.landing-auth-dialog--mode-signup .ds-auth-email-input.ds-input {
  margin-top: 8px;
  min-height: 52px;
}

.landing-auth-dialog--mode-verify .ds-auth-code-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.landing-auth-dialog--mode-verify .ds-auth-code-input.ds-input {
  width: 52px;
  min-height: 60px;
  font-size: 22px;
  font-weight: 700;
}

.landing-auth-dialog--mode-verify .ds-auth-code-input.ds-input:focus-visible {
  border: 1.5px solid var(--color-home-auth-create-bg);
}

.landing-auth-dialog--shell .ds-button--primary.ds-button--full {
  height: 56px;
  min-height: 56px;
  border-radius: 9999px;
  border-color: var(--color-home-auth-create-bg);
  background: var(--color-home-auth-create-bg);
  color: var(--auth-dialog-button-text);
  font-size: 16px;
  font-weight: 600;
  box-shadow: 0 6px 16px var(--auth-dialog-button-shadow);
}

.landing-auth-dialog--shell .ds-button--primary.ds-button--full:hover,
.landing-auth-dialog--shell .ds-button--primary.ds-button--full:focus-visible,
.landing-auth-dialog--shell .ds-button--primary.ds-button--full:active {
  border-color: var(--color-home-auth-create-hover);
  background: var(--color-home-auth-create-hover);
  transform: none;
}

@media (max-width: 640px) {
  .landing-auth-dialog--shell {
    width: min(342px, 100%);
    padding: 0 32px 36px;
  }

  .landing-auth-dialog--shell .ds-dialog__emoji {
    font-size: 44px;
  }

  .landing-auth-dialog--shell .ds-dialog__title {
    font-size: 32px;
  }

  .landing-auth-dialog--shell .ds-dialog__description {
    margin-bottom: 14px;
    max-width: 240px;
    font-size: 14px;
  }

  .landing-auth-dialog--shell .ds-auth-form {
    row-gap: 14px;
  }

  .landing-auth-dialog--mode-login .ds-auth-email-input.ds-input,
  .landing-auth-dialog--mode-signup .ds-auth-email-input.ds-input,
  .landing-auth-dialog--mode-verify .ds-auth-code-input.ds-input {
    min-height: 46px;
  }

  .landing-auth-dialog--mode-verify .ds-auth-code-input.ds-input {
    width: 38px;
    border-radius: 10px;
    font-size: 18px;
  }

  .landing-auth-dialog--shell .ds-button--primary.ds-button--full {
    height: 52px;
    min-height: 52px;
  }
}

.landing-auth-close {
  position: absolute;
}

.landing-auth-dialog .form-errors {
  margin: 8px 0 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-alert-border);
  background: var(--color-alert-surface);
  color: var(--auth-dialog-error-text);
  font-size: var(--text-sm);
  text-align: left;
}

.landing-hero-shell > .hero-actions {
  position: absolute;
  top: 222px;
  left: 700px;
  flex-direction: row;
  justify-content: flex-start;
  flex-wrap: nowrap;
  gap: var(--space-125);
  margin: 0;
}

.hero-meta {
  margin: 0;
  color: var(--home-progress-text);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.hero-progress {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  align-self: flex-start;
  gap: var(--space-1);
  position: absolute;
  top: 56px;
  right: 24px;
  min-width: 277px;
  width: 277px;
  min-height: 68px;
  background: var(--home-progress-bg);
  border: 1px solid var(--home-progress-border);
  text-align: right;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  margin: 0;
  box-shadow:
    0 1px 2px color-mix(in srgb, var(--home-hero-title), transparent 92%),
    0 10px 22px color-mix(in srgb, var(--home-hero-title), transparent 88%);
}

@container landing-hero (max-width: 44rem) {
  .landing-hero-shell {
    position: static;
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "progress"
      "actions";
    row-gap: var(--space-3);
    padding: var(--space-6) var(--space-5);
    display: grid;
  }

  .landing-hero-copy,
  .hero-progress,
  .landing-hero-shell > .hero-actions {
    position: static;
    top: auto;
    right: auto;
    left: auto;
    width: auto;
    margin: 0;
  }

  .hero-progress {
    justify-self: stretch;
    min-width: 0;
    text-align: left;
  }

  .landing-progress {
    min-width: 0;
    max-width: 100%;
  }

  .landing-hero-shell > .hero-actions {
    justify-content: stretch;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
  }

  .landing-hero-shell > .hero-actions .ds-button {
    width: 100%;
    padding: var(--space-3) var(--space-085);
    text-align: center;
  }
}

.landing .hero-actions .ds-button,
.landing .cta-actions .ds-button {
  min-height: 56px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.005em;
  padding: 0 var(--space-7);
}

.landing .hero-actions .ds-button {
  min-height: 60px;
  padding: 0 32px;
}

.landing .hero-actions .ds-button--primary,
.landing .cta-actions .ds-button--primary {
  border-color: var(--home-button-main-border);
  background: linear-gradient(
    180deg,
    var(--home-button-main-start) 0%,
    var(--home-button-main-end) 100%
  );
  color: var(--home-button-main-text);
  box-shadow:
    0 1px 0 color-mix(in srgb, var(--color-text-inverse), transparent 55%) inset,
    0 12px 24px
    color-mix(in srgb, var(--color-home-button-main-shadow), transparent 66%);
}

.landing .hero-actions .ds-button--secondary,
.landing .cta-actions .ds-button--secondary {
  border-color: var(--home-button-alt-border);
  background: var(--home-button-alt-bg);
  color: var(--home-button-alt-text);
  box-shadow:
    0 1px 0 color-mix(in srgb, var(--color-text-inverse), transparent 35%) inset,
    0 8px 16px color-mix(in srgb, var(--home-button-alt-text), transparent 90%);
}

@media (max-width: 640px) {
  .landing .hero-actions .ds-button--primary,
  .landing .cta-actions .ds-button--primary {
    border-color: var(--color-home-button-main-border-mobile);
    background: linear-gradient(
      180deg,
      var(--color-home-button-main-start-mobile) 0%,
      var(--color-home-button-main-end-mobile) 100%
    );
  }
}

@container landing-hero (max-width: 30rem) {
  .landing-hero-shell > .hero-actions {
    grid-template-columns: 1fr;
  }

  .landing-hero-shell > .hero-actions .ds-button {
    padding: var(--space-3) var(--space-12);
  }
}

.landing-board {
  display: flex;
  justify-content: center;
  padding: var(--space-7) var(--space-9) var(--space-2);
  border-radius: 32px;
  position: relative;
}

.landing-board-frame .board-wrapper {
  --board-scale: 0.82;
  --board-margin: calc(var(--space-16) * -1) auto calc(var(--space-145) * -1);
  transform-origin: top center;
}

.landing-lessons {
  background: linear-gradient(
    180deg,
    var(--home-lessons-shell-start),
    var(--home-lessons-shell-end)
  );
}

.landing-lessons {
  padding: var(--space-5) var(--space-6) var(--space-7);
  border-radius: var(--radius-xl);
  border: 1px solid var(--home-lessons-shell-border);
  box-shadow: 0 10px 24px
    color-mix(in srgb, var(--color-surface-dark), transparent 90%);
  margin-top: calc(var(--space-7) * -1);
}

.lessons-header {
  text-align: center;
  margin-bottom: var(--space-5);
}

.lessons-header h2 {
  margin: 0;
  line-height: 1.15;
}

.lessons-header p {
  color: var(--home-lessons-subtext);
  margin: var(--space-2) auto 0;
  max-width: var(--width-md);
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.lesson-card {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-5) var(--space-3);
  background: color-mix(in srgb, var(--color-text-inverse), transparent 10%);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-soft);
}

.lessons-grid .lesson-card:nth-child(1) {
  background: linear-gradient(
    180deg,
    var(--color-home-lesson-start) 0%,
    var(--color-home-lesson-1-end) 100%
  );
  border-color: var(--color-home-lesson-1-border);
}

.lessons-grid .lesson-card:nth-child(2) {
  background: linear-gradient(
    180deg,
    var(--color-home-lesson-start) 0%,
    var(--color-home-lesson-2-end) 100%
  );
  border-color: var(--color-home-lesson-2-border);
}

.lessons-grid .lesson-card:nth-child(3) {
  background: linear-gradient(
    180deg,
    var(--color-home-lesson-start) 0%,
    var(--color-home-lesson-3-end) 100%
  );
  border-color: var(--color-home-lesson-3-border);
}

.lesson-card.completed {
  border-color: var(--color-border-success);
  background: var(--color-success-soft);
}

.lesson-card.next-up {
  border-color: var(--color-highlight-border);
  background: linear-gradient(
    180deg,
    var(--color-callout-start),
    var(--color-highlight-surface)
  );
  box-shadow:
    var(--shadow-soft),
    0 0 0 2px var(--color-highlight-shadow);
}

.lesson-card-top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: calc(var(--space-1) * -1);
}

.lesson-badge {
  display: inline-flex;
}

.lesson-card.completed .lesson-badge {
  background: var(--color-success);
}

.lesson-index {
  text-transform: uppercase;
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--home-lessons-meta);
}

.landing-lessons .lesson-badge.ds-lesson-badge--sm {
  width: 44px;
  height: 44px;
  font-size: 22px;
}

.lesson-card h3 {
  margin: var(--space-3) 0 var(--space-1);
  font-size: var(--text-13);
  line-height: 1.2;
  color: var(--home-lessons-title);
}

.lesson-card p {
  margin: 0 0 var(--space-3);
  color: var(--home-lessons-subtext);
  font-size: var(--text-09);
}

.lesson-card .ds-badge {
  margin-top: auto;
  margin-bottom: var(--space-2);
  align-self: flex-start;
  min-height: 30px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid var(--home-button-alt-border);
  background: var(--home-button-alt-bg);
  color: var(--home-button-alt-text);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: none;
}

.lesson-card .ds-badge.ds-badge--completed {
  border-color: var(--color-home-badge-completed-border);
  background: var(--color-home-badge-completed-bg);
  color: var(--color-home-badge-completed-text);
}

.lesson-card .ds-badge.ds-badge--next {
  border-color: var(--home-button-alt-border);
  background: var(--home-button-alt-bg);
  color: var(--home-button-alt-text);
}

.landing-progress {
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--home-progress-track);
  box-shadow: inset 0 1px 2px
    color-mix(in srgb, var(--color-surface-dark), transparent 92%);
  overflow: hidden;
  width: 100%;
  min-width: 220px;
  max-width: 360px;
}

.landing-progress-fill {
  display: block;
  height: 100%;
  width: var(--progress, 0%);
  background: linear-gradient(
    90deg,
    var(--home-progress-fill-start),
    var(--home-progress-fill-end)
  );
  border-radius: inherit;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.landing-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: 0;
  padding: 28px 40px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--home-bottom-banner-border);
  background: linear-gradient(
    180deg,
    var(--home-bottom-banner-start) 0%,
    var(--home-bottom-banner-end) 100%
  );
  box-shadow: 0 8px 20px
    color-mix(in srgb, var(--color-surface-dark), transparent 91%);
}

.landing-cta > div {
  min-width: 0;
}

.landing-cta > div:first-child {
  flex: 1;
  max-width: 560px;
  padding-top: 0;
}

.landing-cta h2 {
  margin: 0 0 var(--space-045);
  font-size: clamp(var(--text-16), 2.4vw, var(--text-20));
  color: var(--home-bottom-banner-title);
}

.landing-cta p {
  margin: 0;
  color: var(--home-bottom-banner-body);
  font-size: var(--text-md);
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: nowrap;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  flex: 0 0 auto;
  margin-right: 0;
}

.landing-hero .ds-button,
.landing-cta .ds-button {
  white-space: nowrap;
}

.landing-resource {
  text-align: center;
  margin-top: var(--space-5);
  padding-top: var(--space-3);
}

.landing-resource-links {
  display: grid;
  gap: var(--space-2);
  justify-items: center;
}

.landing-resource-links::before {
  content: "";
  width: min(280px, 72vw);
  height: 1px;
  background: var(--home-resource-divider);
  margin-bottom: var(--space-2);
}

.landing-resource-links .ds-link {
  color: var(--home-resource-link);
}

.feedback-page {
  display: flex;
  flex-direction: column;
  margin: 0 0 var(--space-6);
}

.feedback-page > .ds-back-link {
  margin-bottom: var(--space-5);
}

.feedback-page-card {
  width: 100%;
  max-width: var(--width-md);
  margin: 0 auto;
}

.feedback-page-header h1 {
  margin-top: 0;
  margin-bottom: var(--space-2);
}

.feedback-page-header p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}

.feedback-flash {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}

.feedback-flash--success {
  border: 1px solid var(--color-border-success);
  background: var(--color-success-soft);
  color: var(--color-success-strong);
}

.feedback-form {
  display: grid;
  gap: var(--space-3);
}

.feedback-form-field {
  display: grid;
  gap: var(--space-1);
}

.feedback-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.feedback-form-field label {
  font-weight: 600;
  color: var(--color-text-primary);
}

.feedback-form-field textarea.ds-input {
  width: 100%;
  resize: vertical;
}

.feedback-form-field textarea.ds-input:focus-visible {
  outline: 2px solid var(--color-accent-secondary);
  outline-offset: 2px;
}

.history-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.history-hero {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.history-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  margin-bottom: var(--space-2);
}

.history-subhead {
  max-width: 62ch;
  margin: 0 auto var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-11);
}

.history-section h2 {
  margin-top: 0;
}

.history-section p,
.history-section li {
  color: var(--color-text-primary);
}

.history-section p {
  margin: 0;
}

.history-section p + p {
  margin-top: var(--space-2);
}

.history-section ul,
.history-timeline {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-12);
  display: grid;
  gap: var(--space-1);
}

.history-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.history-cta h2 {
  margin: 0 0 var(--space-045);
}

.history-cta p {
  margin: 0;
  color: var(--color-text-muted);
}

.first-grade-math {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.first-grade-hero {
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.first-grade-hero .hero-actions {
  justify-content: center;
}

.first-grade-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  margin-bottom: var(--space-2);
}

.first-grade-subhead {
  max-width: var(--width-lg);
  margin: 0 auto var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-11);
}

.print-trigger {
  cursor: pointer;
}

.first-grade-benefits {
  padding: var(--space-175) var(--space-6);
  text-align: center;
}

.first-grade-benefits h2 {
  margin-top: 0;
}

.first-grade-benefits ul {
  margin: 0 auto;
  padding-left: var(--space-12);
  list-style-position: outside;
  display: inline-grid;
  gap: var(--space-2);
  text-align: left;
}

.print-guide {
  padding: var(--space-6);
}

.print-guide-header h2 {
  margin: 0;
}

.print-guide-header p {
  margin: var(--space-045) 0 0;
  color: var(--color-text-muted);
}

.print-guide-board {
  margin-top: var(--space-4);
}

.print-guide-board .landing-board-frame .board-wrapper {
  --board-scale: 0.72;
  --board-margin: calc(var(--space-16) * -1) auto;
}

.print-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-125);
}

.print-guide-grid article {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  background: var(--color-surface-panel);
}

.print-guide-grid h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-105);
}

.print-guide-grid ol,
.print-guide-grid ul {
  margin: 0;
  padding-left: var(--space-12);
  display: grid;
  gap: var(--space-035);
}

.print-tip {
  margin: var(--space-4) 0 0;
  padding: var(--space-3) var(--space-095);
  border-radius: var(--radius-sm);
  background: var(--color-warning-soft);
  color: var(--color-text-primary);
}

.print-reference {
  display: none;
}

/* ==========================================================================
   Responsive Breakpoints (ordered largest → smallest)
   ========================================================================== */

@media (max-width: 900px) {
  .global-auth-wrap--landing .global-auth {
    border-radius: 0;
  }

  .landing-page-shell {
    width: min(100%, 720px);
    gap: var(--space-4);
  }

  .landing-hero-shell {
    position: static;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "progress"
      "actions";
    row-gap: var(--space-3);
    padding: var(--space-6) var(--space-5);
    min-height: 0;
  }

  .landing-hero-copy,
  .hero-progress,
  .landing-hero-shell > .hero-actions {
    position: static;
    top: auto;
    right: auto;
    left: auto;
    width: auto;
    margin: 0;
  }

  .landing-hero-copy {
    width: auto;
  }

  .landing-hero h1 {
    white-space: normal;
    font-size: clamp(var(--text-2-5), 7vw, var(--text-35));
  }

  .hero-subhead {
    max-width: none;
    margin: 0;
  }

  .hero-progress {
    justify-self: stretch;
    min-width: 0;
    width: 100%;
    text-align: left;
    min-height: 68px;
  }

  .landing-progress {
    min-width: 0;
    max-width: 100%;
  }

  .landing-hero-shell > .hero-actions {
    justify-content: stretch;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
  }

  .landing-hero-shell > .hero-actions .ds-button {
    width: 100%;
    min-height: 50px;
    padding: 0 var(--space-4);
    text-align: center;
  }

  .landing-lessons {
    margin-top: 0;
  }

  .landing {
    gap: var(--space-5);
  }

  .landing-board {
    padding: var(--space-4) var(--space-2) var(--space-2);
    margin-bottom: calc(var(--space-4) * -1);
  }

  .landing-cta {
    flex-direction: column;
    align-items: flex-start;
    min-height: 0;
    padding: var(--space-5) var(--space-5);
  }

  .cta-actions {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
    margin-right: 0;
  }

  .lessons-grid {
    grid-template-columns: 1fr;
  }

  .print-guide-grid {
    grid-template-columns: 1fr;
  }

  .history-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .print-guide-board .landing-board-frame .board-wrapper {
    --board-scale: 0.62;
    --board-margin: -2rem auto;
  }
}

@media (max-width: 900px) and (orientation: portrait) {
  .landing-page-shell {
    width: min(100%, 720px);
  }

  .landing-board {
    margin-bottom: calc(var(--space-8) * -1);
    padding-bottom: 0;
  }

  .landing-hero-shell > .hero-actions {
    grid-template-columns: 1fr;
  }
}

/* Shared small-screen overflow prevention */
@media (max-width: 720px) {
  .landing {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-x: hidden;
    overflow-x: clip;
  }

  .landing-cta {
    gap: var(--space-4);
  }

  .cta-actions {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .landing-board,
  .landing-board-frame {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .landing-board-frame {
    display: flex;
    justify-content: center;
  }
}

@media (max-width: 720px) and (orientation: landscape) {
  .landing-page-shell {
    width: min(100%, 640px);
    gap: var(--space-4);
  }

  .landing {
    gap: var(--space-6);
    padding: var(--space-2) 0 var(--space-5);
  }

  .landing-hero {
    width: 100%;
    padding: 0 var(--space-2);
    overflow: hidden;
  }

  .landing-hero-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 268px);
    grid-template-areas:
      "copy progress"
      "copy actions";
    column-gap: var(--space-3);
    row-gap: var(--space-2);
    padding: var(--space-5) var(--space-4) var(--space-5) var(--space-5);
    min-height: 0;
  }

  .landing-hero-copy {
    position: static;
    width: auto;
    grid-area: copy;
    padding-left: var(--space-1);
  }

  .hero-progress {
    position: static;
    width: 100%;
    min-width: 0;
    text-align: left;
    grid-area: progress;
    justify-self: stretch;
  }

  .landing-hero-shell > .hero-actions {
    position: static;
    margin: 0;
    grid-area: actions;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2);
    justify-content: stretch;
  }

  .landing-hero-shell > .hero-actions .ds-button {
    width: 100%;
    min-height: 50px;
    padding: 0 var(--space-3);
    text-align: center;
  }

  .landing-hero h1 {
    font-size: clamp(var(--text-20), 5vw, var(--text-2-5));
    white-space: normal;
  }

  .hero-subhead {
    font-size: var(--text-md);
    margin-bottom: var(--space-125);
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
    align-items: center;
  }

  .landing-cta .ds-button {
    width: min(100%, 280px);
    padding: var(--space-065) var(--space-12);
    font-size: var(--text-09);
  }

  .landing-cta {
    align-items: center;
    text-align: center;
  }
}

@media (min-width: 721px) and (max-width: 1024px) and (orientation: landscape) {
  .landing-page-shell {
    width: min(100%, 960px);
    gap: var(--space-4);
  }

  .landing {
    gap: var(--space-6);
    padding: var(--space-2) 0 var(--space-6);
  }

  .landing-hero-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    grid-template-areas:
      "copy progress"
      "copy actions";
    column-gap: var(--space-3);
    row-gap: var(--space-2);
    padding: var(--space-5) var(--space-4) var(--space-5) var(--space-6);
    min-height: 0;
  }

  .landing-hero-copy {
    position: static;
    width: auto;
    grid-area: copy;
  }

  .landing-hero h1 {
    font-size: clamp(var(--text-2-5), 5.6vw, var(--text-35));
    white-space: normal;
  }

  .hero-progress {
    position: static;
    width: 100%;
    min-width: 0;
    text-align: left;
    grid-area: progress;
    justify-self: stretch;
  }

  .landing-hero-shell > .hero-actions {
    position: static;
    margin: 0;
    grid-area: actions;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2);
    justify-content: stretch;
  }

  .landing-hero-shell > .hero-actions .ds-button {
    width: 100%;
    min-height: 50px;
    padding: 0 var(--space-3);
    text-align: center;
  }
}

@media (max-width: 640px) {
  .global-auth-wrap--landing,
  .landing {
    --home-hero-bg-start: var(--color-home-hero-bg-start-mobile);
    --home-hero-bg-end: var(--color-home-hero-bg-end-mobile);
    --home-hero-title: var(--color-home-hero-title-mobile);
    --home-hero-subtext: var(--color-home-hero-subtext-mobile);
    --home-progress-bg: var(--color-home-progress-bg-mobile);
    --home-progress-border: var(--color-home-progress-border-mobile);
    --home-progress-text: var(--color-home-progress-text-mobile);
    --home-button-main-start: var(--color-home-button-main-start-mobile);
    --home-button-main-end: var(--color-home-button-main-end-mobile);
    --home-button-main-border: var(--color-home-button-main-border-mobile);
    --home-lessons-title: var(--color-home-lessons-title-mobile);
    --home-lessons-subtext: var(--color-home-lessons-subtext-mobile);
    --home-lessons-meta: var(--color-home-lessons-meta-mobile);
    --home-bottom-banner-title: var(--color-home-bottom-banner-title-mobile);
    --home-bottom-banner-body: var(--color-home-bottom-banner-body-mobile);
    --home-resource-link: var(--color-home-resource-link-mobile);
  }

  .global-auth-wrap--landing .global-auth {
    min-height: 52px;
    padding: 0 var(--space-3);
  }

  .global-auth-wrap--landing .global-auth-link {
    font-size: var(--text-sm);
  }

  .landing-page-shell {
    width: min(100%, 318px);
    gap: var(--space-3);
  }

  .landing-hero-shell {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "progress"
      "actions";
    row-gap: var(--space-2);
    padding: var(--space-6) var(--space-5);
    min-height: 0;
  }

  .landing-hero h1 {
    font-size: clamp(var(--text-2-5), 9.5vw, var(--text-35));
    margin: 0 0 var(--space-3);
    max-width: none;
    white-space: normal;
  }

  .hero-subhead {
    max-width: none;
    padding-left: 0;
    hyphens: auto;
    word-break: break-word;
    font-size: var(--text-105);
    margin: 0;
  }

  .hero-progress {
    position: static;
    justify-self: stretch;
    min-width: 278px;
    width: 100%;
    min-height: 68px;
    text-align: left;
  }

  .landing-progress {
    min-width: 0;
    max-width: 100%;
  }

  .landing-hero-shell > .hero-actions {
    position: static;
    justify-content: stretch;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
    margin-right: 0;
  }

  .landing-hero-shell > .hero-actions .ds-button {
    width: 100%;
    min-height: 50px;
    padding: 0 var(--space-4);
    text-align: center;
  }

  .landing-board-frame .board-wrapper {
    --board-scale: 0.54;
    --board-margin: 0 auto;
  }

  .landing-lessons {
    padding: var(--space-6) var(--space-4);
  }

  .lesson-card {
    min-height: 220px;
  }

  .lessons-grid .lesson-card:nth-child(2) {
    background: linear-gradient(
      180deg,
      var(--color-home-lesson-start) 0%,
      var(--color-home-lesson-2-end-mobile) 100%
    );
    border-color: var(--color-home-lesson-2-border-mobile);
  }
}

@media (max-width: 480px) {
  .global-auth-wrap--landing .global-auth-logo {
    font-size: var(--text-md);
  }

  .landing-stage {
    gap: 0;
  }

  .landing {
    gap: var(--space-4);
    padding: var(--space-2) 0 var(--space-6);
  }

  .landing-page-shell {
    width: min(100%, 318px);
    gap: var(--space-3);
  }

  .landing-hero h1 {
    font-size: clamp(var(--text-20), 8vw, calc(var(--text-xl) * 2));
  }

  .hero-subhead {
    font-size: var(--text-105);
    margin-bottom: 0;
  }

  .landing-hero-shell > .hero-actions {
    grid-template-columns: 1fr;
  }

  .landing-hero-shell > .hero-actions .ds-button {
    padding: var(--space-3) var(--space-12);
  }

  .landing-board {
    margin-bottom: calc(var(--space-9-8) * -1);
    padding: var(--space-1) var(--space-2);
    border-radius: 24px;
  }

  .landing-board-frame {
    padding: var(--space-1) var(--space-035);
  }

  .landing-board-frame .board-wrapper {
    --board-scale: 0.48;
  }

  .print-guide-board .landing-board-frame .board-wrapper {
    --board-scale: 0.48;
    --board-margin: 0 auto;
  }

  .landing-lessons {
    padding: var(--space-6) var(--space-5);
  }

  .lessons-header {
    margin-bottom: var(--space-4);
  }

  .lesson-card {
    padding: var(--space-4);
  }

  .landing-cta {
    padding: var(--space-6) var(--space-5);
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }

  .cta-actions .ds-button {
    width: 100%;
    text-align: center;
  }

  .first-grade-benefits,
  .print-guide,
  .history-section,
  .history-cta,
  .feedback-page {
    padding: var(--space-14);
  }
}

@media print {
  @page {
    margin: 0.75cm 0.6cm 0.6cm;
  }

  body {
    background: white;
    color: black;
  }

  .page-shell {
    max-width: none;
    padding: 0;
  }

  .first-grade-hero,
  .first-grade-benefits,
  .ds-back-link,
  .hero-actions,
  script,
  .print-trigger {
    display: none;
  }

  .print-guide {
    border: none;
    box-shadow: none;
    padding: 0;
    width: 100%;
    margin: 0;
  }

  .print-guide-board {
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    margin-top: var(--space-1);
  }

  .print-guide-board .landing-board {
    padding: 0;
    margin: 0;
  }

  .print-guide-board .landing-board-frame {
    padding: 0;
  }

  .print-guide-board .landing-board-frame .board-wrapper {
    --board-scale: 0.68;
    --board-margin: var(--space-005) auto calc(var(--space-045) * -1);
  }

  .print-guide-board .tutorial-board {
    background: white;
    border: 2px solid black;
    border-radius: 12px;
    box-shadow: none;
    padding: var(--space-3) var(--space-065);
    gap: var(--space-045);
  }

  .print-guide-board .pit,
  .print-guide-board .store {
    background: white;
    border: 2px solid black;
    box-shadow: none;
  }

  .print-guide-board .pit {
    width: 72px;
    height: 72px;
  }

  .print-guide-board .store {
    width: 72px;
    height: 154px;
  }

  .print-guide-board .pit-label {
    color: black;
  }

  .print-guide-board .stone {
    box-shadow: none;
    border: 2px solid black;
  }

  .print-guide-board .store-count,
  .print-guide-board .stone-overflow {
    box-shadow: none;
    border: 2px solid black;
  }

  .print-guide-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-065);
    margin-top: calc(var(--space-035) * -1);
    display: grid;
  }

  .print-guide-grid article {
    border: 1px solid lightgray;
    break-inside: avoid;
    padding: var(--space-055) var(--space-065);
  }

  .print-guide-header p,
  .print-tip {
    margin-top: 0;
    font-size: var(--text-092);
  }

  .print-tip {
    background: white;
    border: 1px solid lightgray;
    padding: var(--space-035) var(--space-055);
  }

  .print-reference {
    display: block;
    margin: 0;
    text-align: right;
    font-size: var(--text-xs);
    font-weight: 600;
    color: black;
  }
}

@media (max-width: 480px) {
  .landing-board-frame .board-wrapper {
    --board-scale: 0.44;
  }

  .print-guide-board .landing-board-frame .board-wrapper {
    --board-scale: 0.44;
    --board-margin: 0 auto;
  }
}

@media (max-width: 360px) {
  .landing-hero h1 {
    font-size: clamp(var(--text-20), 10vw, calc(var(--text-20) * 1.15));
  }

  .hero-subhead {
    font-size: var(--text-sm);
  }

  .landing-board-frame .board-wrapper {
    --board-scale: 0.48;
  }

  .print-guide-board .landing-board-frame .board-wrapper {
    --board-scale: 0.42;
    --board-margin: 0 auto;
  }
}