*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--color-paper);
  color: var(--color-graphite);
  font-family: var(--font-text);
  font-size: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  margin: 0;
  background-color: var(--color-paper);
  background-image:
    radial-gradient(circle at 18% 22%, var(--color-rule-soft) 0 0.0625rem, transparent 0.0875rem),
    repeating-linear-gradient(0deg, transparent 0 var(--space-5), var(--color-rule-soft) var(--space-5) calc(var(--space-5) + var(--stroke-thin)));
  background-size: var(--space-6) var(--space-6), auto;
  font-size: var(--type-body);
  line-height: var(--line-body);
}

button,
textarea,
input {
  color: inherit;
  font: inherit;
}

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

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--color-selection);
  color: var(--color-action-ink);
}

:focus-visible {
  outline: var(--stroke-focus) solid var(--color-focus);
  outline-offset: var(--space-1);
}

a {
  color: inherit;
  text-decoration-thickness: var(--stroke-thin);
  text-underline-offset: var(--space-1);
}

p,
li {
  max-width: var(--measure);
  text-wrap: pretty;
}

[data-slot],
.screen,
.lesson-card,
.message,
.status-notice,
.road-step {
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 {
  max-width: 14ch;
  margin-block-end: var(--space-4);
  font-size: var(--type-page-title);
  line-height: var(--line-display);
}

h2 {
  margin-block-end: var(--space-4);
  font-size: var(--type-section-title);
  line-height: var(--line-title);
}

h3 {
  margin-block-end: var(--space-3);
  font-size: var(--type-card-title);
  line-height: var(--line-card);
}

.skip-link {
  position: fixed;
  z-index: 100;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  min-height: var(--touch-target);
  padding: var(--space-2) var(--space-4);
  transform: translateY(-180%);
  border: var(--stroke) solid var(--color-graphite);
  border-radius: var(--radius-sm);
  background: var(--color-sheet);
  transition: transform var(--duration-fast) var(--ease-pencil);
}

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

.app-shell {
  width: min(100%, var(--container-max));
  min-height: 100dvh;
  margin-inline: auto;
  padding:
    max(var(--space-4), env(safe-area-inset-top))
    var(--page-gutter)
    calc(var(--nav-height) + var(--space-7) + env(safe-area-inset-bottom));
}

body[data-onboarding-active="true"] .app-shell {
  padding-block-end: calc(var(--space-7) + env(safe-area-inset-bottom));
}

body[data-onboarding-active="true"] .bottom-nav {
  display: none;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-block-end: var(--space-7);
}

.wordmark {
  font-family: var(--font-display);
  font-size: var(--type-section-title);
  font-weight: 700;
  line-height: 1;
}

.quiet-control {
  display: inline-flex;
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  align-items: center;
  justify-content: center;
  gap: var(--control-gap);
  padding: var(--space-2) var(--space-3);
  border: var(--stroke-thin) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-sheet);
  font-size: var(--type-caption);
}

.quiet-control:hover,
.button-secondary:hover,
.icon-button:hover,
.nav-button:hover {
  background: var(--color-watercolor-soft);
  color: var(--color-graphite);
}

.screen,
.onboarding {
  animation: page-arrives var(--duration-base) var(--ease-pencil) both;
}

@keyframes page-arrives {
  from { opacity: 0.72; transform: translateY(var(--space-2)); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes draw-first-line {
  from { transform: rotate(-4deg) scaleX(0); }
}

@keyframes thinking {
  to { transform: rotate(1turn); }
}

.onboarding {
  display: grid;
  min-height: min(38rem, calc(100dvh - var(--nav-height) - var(--space-10)));
  align-content: center;
  gap: var(--space-5);
}

.first-mark {
  position: relative;
  min-height: var(--first-mark-height);
  border-block: var(--stroke-thin) solid var(--color-rule-soft);
}

.first-mark::before,
.first-mark::after {
  position: absolute;
  content: "";
  inset-inline: 8%;
  inset-block-start: 50%;
  height: var(--stroke);
  border-radius: var(--radius-pill);
  background: var(--color-graphite);
  transform: rotate(-4deg) scaleX(0.82);
  transform-origin: left;
  animation: draw-first-line var(--duration-draw) var(--ease-pencil) both;
}

.first-mark::after {
  inset-block-start: 52%;
  height: var(--stroke-thin);
  opacity: 0.5;
  transform: rotate(-3.4deg) scaleX(0.78);
}

.button-primary,
.button-secondary,
.icon-button {
  position: relative;
  display: inline-flex;
  min-height: var(--primary-target);
  align-items: center;
  justify-content: center;
  gap: var(--control-gap);
  border-radius: var(--radius-md);
  font-size: var(--type-control);
  line-height: var(--line-control);
  text-align: center;
  transition:
    background-color var(--duration-fast) var(--ease-pencil),
    color var(--duration-fast) var(--ease-pencil),
    transform var(--duration-fast) var(--ease-pencil);
}

.hand-contour {
  --contour-turn: -0.18deg;
  position: relative;
}

.hand-contour::after {
  position: absolute;
  content: "";
  inset: var(--space-1);
  border: var(--stroke-thin) solid currentColor;
  border-radius: inherit;
  opacity: 0.46;
  pointer-events: none;
  transform: rotate(var(--contour-turn));
}

.hand-contour:nth-child(even) {
  --contour-turn: 0.16deg;
}

.button-primary {
  min-width: min(100%, var(--cta-max));
  padding: var(--space-3) var(--space-5);
  border: var(--stroke) solid var(--color-graphite);
  background: var(--color-action);
  color: var(--color-action-ink);
}

.button-primary:hover {
  background: var(--color-action-hover);
}

.button-primary:active,
.button-secondary:active,
.icon-button:active {
  transform: translateY(var(--stroke-thin));
}

.button-secondary {
  padding: var(--space-3) var(--space-5);
  border: var(--stroke) solid var(--color-rule);
  background: var(--color-sheet);
}

.icon-button {
  width: var(--touch-target);
  min-height: var(--touch-target);
  padding: var(--space-2);
  border: var(--stroke-thin) solid var(--color-rule);
  background: var(--color-sheet);
}

.sketch-panel {
  position: relative;
  padding: var(--panel-padding);
  border: var(--stroke) solid var(--color-rule);
  border-radius: var(--radius-lg) var(--radius-md) var(--radius-lg) var(--radius-sm);
  background: var(--color-sheet);
}

.sketch-panel::after {
  position: absolute;
  z-index: -1;
  content: "";
  inset: var(--space-1) calc(var(--space-1) * -1) calc(var(--space-1) * -1) var(--space-1);
  border: var(--stroke-thin) solid var(--color-rule);
  border-radius: var(--radius-md) var(--radius-lg) var(--radius-sm) var(--radius-lg);
  pointer-events: none;
}

.screen-head {
  margin-block-end: var(--space-7);
}

.screen-head p {
  color: var(--color-graphite-soft);
}

.lesson-meta,
.progress-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-block-end: var(--space-5);
  color: var(--color-graphite-soft);
}

.lesson-result {
  display: grid;
  min-height: var(--preview-height);
  place-items: center;
  margin-block: var(--space-6);
  border-block: var(--stroke-thin) solid var(--color-rule-soft);
}

.lesson-result svg {
  width: min(70%, var(--art-max));
  color: var(--color-graphite);
}

.text-link {
  display: inline-flex;
  min-height: var(--touch-target);
  align-items: center;
  margin-block-start: var(--space-5);
  font-size: var(--type-control);
}

.road {
  position: relative;
  display: grid;
  gap: var(--space-5);
  margin: 0;
  padding: var(--space-3) 0 var(--space-3) var(--space-8);
  list-style: none;
}

.road::before {
  position: absolute;
  content: "";
  inset-block: var(--space-4);
  inset-inline-start: var(--space-5);
  width: var(--stroke);
  border-radius: var(--radius-pill);
  background: var(--color-rule);
}

.road-step {
  position: relative;
  min-height: var(--touch-target);
}

.road-step::before {
  position: absolute;
  content: "";
  width: var(--space-4);
  height: var(--space-4);
  inset-block-start: var(--space-2);
  inset-inline-start: calc(var(--space-7) * -1);
  border: var(--stroke) solid var(--color-rule);
  border-radius: 47% 53% 45% 55%;
  background: var(--color-paper);
}

.road-step[data-stage-state="completed"]::before {
  background: var(--color-watercolor);
}

.road-step[data-stage-state="completed"] strong::after,
.road-step[data-stage-state="locked"] strong::after {
  color: var(--color-graphite-soft);
  font-family: var(--font-text);
  font-size: var(--type-caption);
  font-weight: 400;
  letter-spacing: 0;
}

.road-step[data-stage-state="completed"] strong::after {
  content: " — пройден";
}

.road-step[data-stage-state="locked"] strong::after {
  content: " — позже";
}

.road-step[data-stage-state="current"]::before {
  width: var(--space-5);
  height: var(--space-5);
  inset-block-start: var(--space-1);
  inset-inline-start: calc(var(--space-7) * -1 - var(--space-1));
  border-color: var(--color-graphite);
  background: var(--color-action);
}

.road-step strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--type-card-title);
  line-height: var(--line-card);
}

.road-step span {
  color: var(--color-graphite-soft);
}

.stage-lessons {
  display: grid;
  grid-template-columns: repeat(3, var(--touch-target));
  gap: var(--space-2);
  max-width: 22rem;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 30rem) {
  .stage-lessons {
    grid-template-columns: repeat(6, var(--touch-target));
  }
}

.lesson-dot {
  width: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  padding: 0;
  border: var(--stroke-thin) solid var(--color-rule);
  border-radius: 48% 52% 45% 55%;
  background: var(--color-sheet);
}

.lesson-dot[data-lesson-state="completed"] {
  border-color: var(--color-success);
  background: var(--color-watercolor-soft);
  color: var(--color-success);
}

.lesson-dot[data-lesson-state="available"],
.lesson-dot[data-lesson-state="in_progress"] {
  border-width: var(--stroke);
  border-color: var(--color-graphite);
  background: var(--color-action);
  color: var(--color-action-ink);
}

.progress-line {
  position: relative;
  height: var(--space-3);
  overflow: hidden;
  border: var(--stroke-thin) solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: var(--color-paper);
}

.progress-line span {
  display: block;
  width: 1%;
  height: 100%;
  background: var(--color-watercolor);
}

.skill-list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

.skill-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.skill-list svg {
  flex: 0 0 var(--icon-size);
  color: var(--color-success);
}

.skill-mark {
  display: inline-grid;
  width: var(--icon-size);
  height: var(--icon-size);
  flex: 0 0 var(--icon-size);
  place-items: center;
  border: var(--stroke-thin) solid currentColor;
  border-radius: 50%;
  color: var(--color-success);
  line-height: 1;
}

.chat-log {
  display: grid;
  gap: var(--space-4);
  min-height: var(--visual-height);
  margin-block-end: var(--space-6);
}

.message {
  max-width: min(90%, var(--measure));
  padding: var(--space-3) var(--space-4);
  border: var(--stroke-thin) solid var(--color-rule);
  border-radius: var(--radius-md) var(--radius-lg) var(--radius-md) var(--radius-sm);
  background: var(--color-sheet);
}

.message--mentor {
  justify-self: start;
}

.message--student {
  justify-self: end;
  border-color: var(--color-watercolor);
  background: var(--color-watercolor-soft);
}

.chat-composer {
  display: grid;
  gap: var(--space-3);
}

.chat-composer label {
  font-family: var(--font-display);
  font-size: var(--type-card-title);
  line-height: var(--line-card);
}

.chat-composer textarea {
  width: 100%;
  min-height: var(--composer-height);
  resize: vertical;
  padding: var(--space-4);
  border: var(--stroke) solid var(--color-rule);
  border-radius: var(--radius-md) var(--radius-lg) var(--radius-sm) var(--radius-lg);
  background: var(--color-sheet);
  font-size: var(--type-body);
  line-height: var(--line-body);
  caret-color: var(--color-action-hover);
}

.composer-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.status-notice {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: var(--stroke-thin) dashed var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-sheet);
}

.status-notice[data-state="error"] {
  color: var(--color-error);
}

.global-status {
  margin-block: calc(var(--space-4) * -1) var(--space-6);
}

.status-notice[role="alert"]:empty,
.status-notice[role="status"]:empty {
  display: none;
}

.status-notice[data-state="success"] {
  color: var(--color-success);
}

.status-notice[data-state="loading"] svg {
  animation: thinking var(--duration-draw) linear infinite;
}

.loading-lines {
  display: grid;
  width: min(100%, var(--cta-max));
  gap: var(--space-2);
}

.loading-lines span {
  height: var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-rule-soft);
  animation: loading-line var(--duration-draw) var(--ease-pencil) infinite alternate;
}

.loading-lines span:last-child {
  width: 64%;
}

@keyframes loading-line {
  to { opacity: 0.4; transform: scaleX(0.96); }
}

.lesson-view {
  display: grid;
  gap: var(--space-7);
}

.visual-player {
  display: grid;
  gap: var(--space-4);
}

.visual-stage {
  display: grid;
  min-height: var(--visual-height);
  place-items: center;
  overflow: hidden;
  border-block: var(--stroke-thin) solid var(--color-rule-soft);
  background: var(--color-paper);
}

.lesson-animation {
  display: block;
  width: min(100%, 31rem);
  min-height: 13rem;
  color: var(--color-graphite);
}

.frame-count {
  justify-self: start;
  padding: var(--space-1) var(--space-3);
  border: var(--stroke-thin) solid var(--color-rule-soft);
  border-radius: var(--radius-pill);
  background: var(--color-sheet);
  color: var(--color-graphite-soft);
  font-size: var(--type-caption);
}

.frame-description {
  width: 100%;
  margin: 0;
  color: var(--color-graphite-soft);
}

.gesture-trace {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: gesture-draw var(--duration-draw) var(--ease-pencil) forwards;
}

.gesture-pencil {
  animation: pencil-pulse var(--duration-draw) var(--ease-pencil) both;
}

@keyframes gesture-draw {
  to { stroke-dashoffset: 0; }
}

@keyframes pencil-pulse {
  50% { transform: scale(1.45); transform-origin: center; }
}

.mistake-list {
  display: grid;
  gap: var(--space-3);
  padding-inline-start: var(--space-6);
}

.lesson-status {
  flex-wrap: wrap;
  align-items: center;
}

.lesson-status .button-primary {
  flex-basis: 100%;
}

.visual-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.self-checks {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  border: 0;
}

.self-checks legend {
  margin-block-end: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--type-card-title);
}

.self-check {
  display: grid;
  min-height: var(--touch-target);
  grid-template-columns: var(--touch-target) 1fr;
  align-items: start;
  gap: var(--space-2);
}

.self-check input {
  width: var(--space-5);
  height: var(--space-5);
  margin: var(--space-2);
  accent-color: var(--color-action);
}

.bottom-nav {
  position: fixed;
  z-index: 20;
  inset-inline: 0;
  inset-block-end: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  min-height: calc(var(--nav-height) + env(safe-area-inset-bottom));
  padding:
    var(--space-2)
    max(var(--space-2), env(safe-area-inset-right))
    max(var(--space-2), env(safe-area-inset-bottom))
    max(var(--space-2), env(safe-area-inset-left));
  border-block-start: var(--stroke) solid var(--color-rule);
  background: var(--color-sheet);
}

.nav-button {
  display: flex;
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-1);
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-graphite-soft);
  font-size: var(--type-caption);
  line-height: var(--line-control);
  transition:
    background-color var(--duration-fast) var(--ease-pencil),
    color var(--duration-fast) var(--ease-pencil);
}

.nav-button[aria-current="page"] {
  background: var(--color-watercolor-soft);
  color: var(--color-graphite);
  text-decoration: underline;
  text-decoration-thickness: var(--stroke);
  text-underline-offset: var(--space-1);
}

.icon {
  width: var(--icon-size);
  height: var(--icon-size);
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (min-width: 48rem) {
  .lesson-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.7fr);
    gap: var(--space-6);
    align-items: center;
  }

  .lesson-card .lesson-result {
    grid-column: 2;
    grid-row: 1 / span 4;
    margin-block: 0;
    border-block: 0;
    border-inline-start: var(--stroke-thin) solid var(--color-rule-soft);
  }

  .button-primary {
    justify-self: start;
  }

}

@media (min-width: 64rem) {
  .bottom-nav {
    width: min(calc(100% - var(--space-8)), var(--container-max));
    inset-inline: 50% auto;
    transform: translateX(-50%);
    border: var(--stroke) solid var(--color-rule);
    border-block-end: 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}

@media (max-width: 22.5rem) {
  .app-header {
    align-items: flex-start;
  }

  .quiet-control span {
    max-width: 7ch;
  }

  .composer-foot .button-primary {
    width: 100%;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .first-mark::before,
  .first-mark::after {
    transform: rotate(-4deg) scaleX(0.82);
  }
}

:root[data-reduced-motion="true"] *,
:root[data-reduced-motion="true"] *::before,
:root[data-reduced-motion="true"] *::after {
  animation-duration: 1ms !important;
  animation-iteration-count: 1 !important;
  scroll-behavior: auto !important;
  transition-duration: 1ms !important;
}