:root {
  --ink: #111827;
  --ink-soft: #3f4856;
  --muted: #697384;
  --line: #dce2ea;
  --paper: #ffffff;
  --paper-soft: #f6f8fb;
  --night: #101828;
  --night-soft: #182235;
  --red: #e94f37;
  --red-dark: #c73f2a;
  --yellow: #f4b942;
  --teal: #17a894;
  --blue: #2f69d9;
  --shadow: 0 24px 70px rgba(19, 31, 51, 0.18);
  --radius: 8px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 20;
  width: min(calc(100% - 32px), var(--container));
  height: 74px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  margin-top: 14px;
  padding: 0 12px 0 18px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(220, 226, 234, 0.92);
  border-radius: var(--radius);
  box-shadow: 0 18px 54px rgba(17, 24, 39, 0.1);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-icon {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(233, 79, 55, 0.18);
}

.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
  transition:
    background-color 180ms ease,
    color 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: #eef3ff;
  color: var(--blue);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 8px;
  background: var(--paper-soft);
  color: var(--ink);
  cursor: pointer;
}

.menu-button__bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 48px;
  align-items: center;
  width: min(calc(100% - 40px), var(--container));
  min-height: 86svh;
  margin: 0 auto;
  padding: 108px 0 40px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 39%;
  width: min(42vw, 560px);
  height: min(42vw, 560px);
  background:
    radial-gradient(circle at 30% 32%, rgba(244, 185, 66, 0.34), transparent 34%),
    radial-gradient(circle at 76% 64%, rgba(23, 168, 148, 0.22), transparent 38%),
    radial-gradient(circle at 58% 28%, rgba(47, 105, 217, 0.18), transparent 32%);
  filter: blur(8px);
  pointer-events: none;
}

.hero__content,
.hero__visual {
  position: relative;
}

.hero h1 {
  max-width: 660px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(42px, 5vw, 64px);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: 0;
}

.hero__lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 1.55vw, 19px);
  line-height: 1.55;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 22px;
  font-size: 16px;
  font-weight: 850;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button__icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-right: 10px;
  border-radius: 8px;
  font-size: 15px;
  line-height: 1;
}

.button--primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 16px 36px rgba(233, 79, 55, 0.32);
}

.button--primary .button__icon {
  background: rgba(255, 255, 255, 0.17);
}

.button--secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.button--secondary .button__icon {
  background: #eef3ff;
  color: var(--blue);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 650px;
  margin: 30px 0 0;
}

.hero-stats div {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.hero-stats dt {
  color: var(--ink);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 900;
  line-height: 1;
}

.hero-stats dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.hero__visual {
  min-height: 500px;
}

.visual-orbit {
  position: absolute;
  border: 1px solid rgba(17, 24, 39, 0.1);
  border-radius: 999px;
  pointer-events: none;
}

.visual-orbit--one {
  inset: 46px 18px 68px 52px;
}

.visual-orbit--two {
  inset: 116px -12px 132px 102px;
  border-color: rgba(233, 79, 55, 0.16);
}

.phone {
  position: absolute;
  overflow: hidden;
  margin: 0;
  border: 10px solid #121826;
  border-radius: 32px;
  background: #121826;
  box-shadow: var(--shadow);
}

.phone::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 50%;
  z-index: 2;
  width: 76px;
  height: 19px;
  transform: translateX(-50%);
  border-radius: 0 0 14px 14px;
  background: #121826;
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 22px;
}

.phone--front {
  right: 78px;
  top: 0;
  z-index: 3;
  width: 238px;
  aspect-ratio: 368 / 800;
}

.phone--back {
  left: 22px;
  bottom: 16px;
  z-index: 2;
  width: 210px;
  aspect-ratio: 368 / 800;
  transform: rotate(-6deg);
  opacity: 0.96;
}

.quick-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(calc(100% - 40px), var(--container));
  margin: -40px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--night);
  color: #fff;
  box-shadow: 0 20px 60px rgba(16, 24, 40, 0.18);
}

.quick-strip__item {
  display: grid;
  gap: 5px;
  min-height: 120px;
  padding: 24px 26px;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-strip__item:first-child {
  border-left: 0;
}

.quick-strip strong {
  font-size: 17px;
}

.quick-strip span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.section {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
  padding: 112px 0;
}

.section__intro {
  max-width: 780px;
}

.section__label {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section__label--dark {
  color: var(--yellow);
}

.section h2,
.practice h2,
.premium h2,
.download h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(34px, 4.8vw, 58px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
}

.section__intro > p:last-child,
.practice__copy > p,
.progress__copy > p,
.premium__copy > p,
.download p {
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.feature-card {
  min-height: 270px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 18px 46px rgba(17, 24, 39, 0.06);
}

.feature-card__icon {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: 32px;
  border-radius: 8px;
}

.feature-card__icon--red {
  background:
    linear-gradient(135deg, #fff 0 32%, transparent 33%),
    var(--red);
}

.feature-card__icon--yellow {
  background:
    radial-gradient(circle at 30% 30%, #fff 0 18%, transparent 19%),
    var(--yellow);
}

.feature-card__icon--teal {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.84) 0 24%, transparent 25% 48%, rgba(255, 255, 255, 0.84) 49% 72%, transparent 73%),
    var(--teal);
}

.feature-card__icon--blue {
  background:
    linear-gradient(45deg, transparent 0 42%, rgba(255, 255, 255, 0.86) 43% 56%, transparent 57%),
    var(--blue);
}

.feature-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.12;
}

.feature-card p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.practice {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(400px, 1.1fr);
  gap: 54px;
  align-items: center;
  padding: 116px max(20px, calc((100% - var(--container)) / 2));
  background:
    linear-gradient(135deg, rgba(47, 105, 217, 0.22), transparent 38%),
    linear-gradient(315deg, rgba(233, 79, 55, 0.18), transparent 42%),
    var(--night);
  color: #fff;
}

.practice h2,
.premium h2,
.download h2 {
  color: #fff;
}

.practice__copy > p,
.premium__copy > p,
.download p {
  color: rgba(255, 255, 255, 0.75);
}

.mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.mode-tab {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 0 13px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.mode-tab:hover,
.mode-tab.is-active {
  background: #fff;
  color: var(--night);
}

.practice__stage {
  display: grid;
  grid-template-columns: minmax(220px, 330px) minmax(180px, 1fr);
  gap: 18px;
  align-items: stretch;
}

.mode-preview {
  overflow: hidden;
  margin: 0;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
}

.mode-preview img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.mode-preview figcaption {
  display: grid;
  gap: 6px;
  padding: 18px;
  color: var(--ink);
}

.mode-preview strong {
  font-size: 22px;
  line-height: 1.1;
}

.mode-preview span {
  color: var(--muted);
  font-size: 14px;
}

.mode-list {
  display: grid;
  gap: 8px;
}

.mode-list span {
  display: flex;
  align-items: center;
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  padding: 0 13px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 750;
}

.progress {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) minmax(0, 1.05fr);
  gap: 68px;
  align-items: center;
}

.progress__media {
  position: relative;
  min-height: 530px;
}

.progress-panel {
  position: absolute;
  inset: 28px 52px auto 0;
  display: grid;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.progress-panel__header,
.progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.progress-panel__header span,
.progress-row span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.progress-panel__header strong {
  color: var(--teal);
  font-size: 42px;
  line-height: 1;
}

.chart {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: end;
  gap: 10px;
  height: 190px;
  padding: 16px;
  border-radius: var(--radius);
  background: var(--paper-soft);
}

.chart span {
  height: var(--h);
  min-height: 20px;
  border-radius: 8px 8px 3px 3px;
  background: linear-gradient(180deg, var(--teal), var(--blue));
}

.progress-row {
  min-height: 50px;
  padding: 0 2px;
  border-top: 1px solid var(--line);
}

.progress-row strong {
  font-size: 18px;
}

.level-card {
  position: absolute;
  right: 0;
  bottom: 26px;
  display: grid;
  gap: 10px;
  width: 240px;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--night);
  color: #fff;
  box-shadow: 0 24px 64px rgba(16, 24, 40, 0.3);
}

.level-card span,
.level-card small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  font-weight: 750;
}

.level-card strong {
  font-size: 54px;
  line-height: 1;
}

.level-card__bar {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
}

.level-card__bar span {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: var(--yellow);
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--ink-soft);
  font-size: 16px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--teal);
}

.premium {
  padding: 112px max(20px, calc((100% - var(--container)) / 2));
  background:
    linear-gradient(90deg, rgba(244, 185, 66, 0.16), transparent 44%),
    var(--night);
}

.premium__copy {
  max-width: 780px;
}

.premium__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 42px;
}

.premium__grid article {
  display: grid;
  gap: 13px;
  min-height: 190px;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.premium__grid strong {
  color: #fff;
  font-size: 24px;
  line-height: 1.1;
}

.premium__grid span {
  color: rgba(255, 255, 255, 0.7);
}

.download {
  padding: 100px 20px 112px;
  background:
    linear-gradient(135deg, rgba(233, 79, 55, 0.26), transparent 38%),
    linear-gradient(45deg, rgba(23, 168, 148, 0.22), transparent 44%),
    var(--red-dark);
}

.download__inner {
  display: grid;
  justify-items: center;
  width: min(100%, 880px);
  margin: 0 auto;
  text-align: center;
}

.store-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: min(100%, 620px);
  margin-top: 34px;
}

.store-button {
  display: grid;
  gap: 2px;
  min-height: 78px;
  justify-content: start;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  padding: 15px 18px;
  background: #fff;
  color: var(--ink);
  text-align: left;
}

.store-button span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.store-button strong {
  font-size: 18px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
  padding: 30px 0;
  color: var(--muted);
  font-size: 14px;
}

.brand--footer {
  font-size: 15px;
}

@media (max-width: 1040px) {
  .hero,
  .practice,
  .progress {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 24px;
    padding-bottom: 48px;
  }

  .hero__visual {
    min-height: 560px;
  }

  .phone--front {
    right: 18%;
  }

  .phone--back {
    left: 14%;
  }

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

  .practice__stage {
    grid-template-columns: minmax(240px, 330px) minmax(220px, 1fr);
  }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: 1fr auto;
    width: calc(100% - 24px);
    height: 66px;
    margin-top: 10px;
    padding: 0 10px 0 14px;
  }

  .brand {
    font-size: 15px;
  }

  .site-nav {
    position: fixed;
    top: 82px;
    left: 12px;
    right: 12px;
    width: calc(100% - 24px);
    display: none;
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: 0 18px 54px rgba(17, 24, 39, 0.16);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    min-height: 46px;
    display: flex;
    align-items: center;
  }

  .header-cta {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .hero {
    width: min(calc(100% - 28px), var(--container));
    min-height: auto;
    padding-top: 112px;
  }

  .hero h1 {
    font-size: clamp(40px, 13vw, 56px);
  }

  .hero__lead {
    font-size: 17px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero__visual {
    min-height: 510px;
  }

  .phone {
    border-width: 8px;
    border-radius: 28px;
  }

  .phone--front {
    right: 2%;
    width: min(68vw, 246px);
  }

  .phone--back {
    left: 0;
    bottom: 30px;
    width: min(56vw, 205px);
  }

  .quick-strip,
  .feature-grid,
  .premium__grid,
  .store-buttons {
    grid-template-columns: 1fr;
  }

  .quick-strip {
    width: min(calc(100% - 28px), var(--container));
    margin-top: 18px;
  }

  .quick-strip__item {
    min-height: 104px;
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .quick-strip__item:first-child {
    border-top: 0;
  }

  .section {
    width: min(calc(100% - 28px), var(--container));
    padding: 82px 0;
  }

  .section h2,
  .practice h2,
  .premium h2,
  .download h2 {
    font-size: clamp(34px, 11vw, 46px);
  }

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

  .practice,
  .premium {
    padding: 82px 14px;
  }

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

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

  .progress {
    gap: 34px;
  }

  .progress__media {
    min-height: 500px;
  }

  .progress-panel {
    inset: 0 0 auto 0;
  }

  .level-card {
    right: 18px;
    bottom: 0;
  }

  .site-footer {
    width: min(calc(100% - 28px), var(--container));
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 420px) {
  .button {
    width: 100%;
  }

  .hero__visual {
    min-height: 455px;
  }

  .phone--front {
    width: min(70vw, 214px);
  }

  .phone--back {
    width: min(52vw, 172px);
  }

  .mode-list {
    grid-template-columns: 1fr;
  }

  .progress__media {
    min-height: 520px;
  }

  .progress-panel {
    padding: 18px;
  }

  .chart {
    height: 160px;
    gap: 7px;
  }

  .level-card {
    left: 18px;
    right: 18px;
    width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}