* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--color-bg);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(55rem 28rem at 88% -10%, rgba(166, 117, 43, 0.1), transparent 60%),
    radial-gradient(50rem 28rem at -12% 30%, rgba(30, 90, 70, 0.07), transparent 62%),
    var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
  content: "";
  pointer-events: none;
}

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

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

button {
  min-height: var(--tap-size);
  border: 0;
  background: transparent;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

a {
  color: var(--color-green);
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-focus) 55%, transparent);
  outline-offset: 3px;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
}

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

.app-shell {
  display: grid;
  min-height: 100vh;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--rail-width);
}

.sidebar,
.right-rail {
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  padding: 26px 18px 20px;
  border-right: 1px solid var(--color-line);
  background: rgba(253, 251, 245, 0.7);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 0 8px 22px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  flex: none;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-green), var(--color-brass));
  box-shadow: var(--shadow-green);
  color: var(--color-bg);
  font: 700 15px var(--font-display);
}

.brand-name {
  font: 600 17px/1 var(--font-display);
}

.eyebrow,
.brand-subtitle,
.meta {
  color: var(--color-muted);
  font: 500 0.67rem/1.45 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-subtitle {
  margin-top: 3px;
  font-size: 0.55rem;
  letter-spacing: 0.16em;
}

.sidebar-nav {
  display: grid;
  gap: 4px;
}

.nav-item {
  display: flex;
  min-height: 46px;
  align-items: center;
  gap: 11px;
  padding: 0 12px;
  border-radius: 11px;
  color: var(--color-ink-soft);
  font-weight: 600;
  text-align: left;
  text-decoration: none;
}

.nav-item:hover,
.nav-item[aria-current="page"] {
  background: var(--color-green-soft);
  color: var(--color-green-deep);
}

.nav-item .badge {
  min-width: 22px;
  height: 19px;
  margin-left: auto;
  padding: 0 6px;
  border-radius: 99px;
  background: var(--color-brass);
  color: white;
  font-size: 0.65rem;
  line-height: 19px;
  text-align: center;
}

.profile-button {
  display: flex;
  min-height: 52px;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding: 6px 8px;
  border-radius: 12px;
  text-align: left;
}

.profile-button:hover {
  background: var(--color-surface-muted);
}

.avatar {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-green);
  color: white;
  font-weight: 700;
}

.profile-name {
  display: block;
  font-size: 0.83rem;
  font-weight: 700;
}

.profile-status {
  display: block;
  margin-top: 2px;
  color: var(--color-muted);
  font: 500 0.55rem var(--font-mono);
}

.main {
  width: 100%;
  max-width: 940px;
  margin: 0 auto;
  padding: 42px clamp(24px, 4vw, 64px) 80px;
}

.right-rail {
  padding: 28px 18px;
  border-left: 1px solid var(--color-line);
  background: rgba(246, 242, 233, 0.58);
}

.rail-card {
  padding: 17px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface) 84%, transparent);
  box-shadow: var(--shadow-sm);
}

.rail-card + .rail-card {
  margin-top: 12px;
}

.rail-number {
  margin: 5px 0 3px;
  font: 600 2rem/1 var(--font-display);
}

.rail-stat {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: 0.78rem;
}

.rail-stat:last-child {
  border-bottom: 0;
}

.page-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.page-title {
  margin-bottom: 3px;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 0.98;
}

.page-subtitle {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.87rem;
}

.em {
  color: var(--color-green);
  font-style: italic;
}

.card {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.card + .card {
  margin-top: 14px;
}

.card-title {
  margin: 0;
  font-size: 1.3rem;
  line-height: 1.1;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-green), var(--color-green-deep));
  box-shadow: var(--shadow-green);
  color: var(--color-bg);
}

.hero::after {
  position: absolute;
  top: -52px;
  right: -42px;
  width: 170px;
  height: 170px;
  border: 1px solid rgba(246, 242, 233, 0.2);
  border-radius: 50%;
  box-shadow: 0 0 0 24px rgba(246, 242, 233, 0.04), 0 0 0 52px rgba(246, 242, 233, 0.025);
  content: "";
}

.hero .eyebrow {
  color: rgba(246, 242, 233, 0.72);
}

.hero-title {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin: 8px 0 5px;
  color: inherit;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin-bottom: 18px;
  color: rgba(246, 242, 233, 0.82);
  font-size: 0.86rem;
}

.button-row,
.chip-row,
.split {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.button {
  display: inline-flex;
  min-height: var(--tap-size);
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
}

.button:hover {
  border-color: color-mix(in srgb, var(--color-green) 45%, transparent);
  transform: translateY(-1px);
}

.button-primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--color-green), var(--color-brass));
  box-shadow: var(--shadow-green);
  color: var(--color-bg);
}

.button-light {
  border-color: rgba(246, 242, 233, 0.28);
  background: var(--color-bg);
  color: var(--color-green);
}

.button-ghost-light {
  border-color: rgba(246, 242, 233, 0.3);
  background: rgba(246, 242, 233, 0.12);
  color: var(--color-bg);
}

.button-danger {
  color: var(--color-danger);
}

.icon-button {
  display: inline-grid;
  width: var(--tap-size);
  min-width: var(--tap-size);
  padding: 0;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  background: var(--color-surface);
}

.blocks-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.block-card {
  display: flex;
  min-height: 220px;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.block-card.is-suggested {
  border-color: color-mix(in srgb, var(--color-green) 45%, transparent);
  box-shadow: inset 0 3px 0 var(--color-green), var(--shadow-md);
}

.block-icon {
  display: grid;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  place-items: center;
  border-radius: 11px;
  background: var(--color-green-soft);
  font-size: 1.1rem;
}

.block-card:nth-child(2) .block-icon {
  background: var(--color-brass-soft);
}

.block-card p {
  margin: 5px 0 18px;
  color: var(--color-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.block-card .button {
  width: 100%;
  margin-top: auto;
}

.pace-card {
  margin-top: 14px;
}

.pace-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.pace-total {
  font: 600 1.7rem var(--font-display);
}

.progress {
  position: relative;
  height: 10px;
  margin: 14px 0 7px;
  overflow: visible;
  border-radius: 99px;
  background: var(--color-surface-muted);
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-green), var(--color-brass));
}

.progress-marker {
  position: absolute;
  top: -4px;
  width: 1px;
  height: 18px;
  background: var(--color-ink-soft);
  opacity: 0.55;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  color: var(--color-muted);
  font: 500 0.56rem var(--font-mono);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.module-card {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.module-card h2 {
  margin: 7px 0 3px;
  font-size: 1.45rem;
}

.module-lessons {
  display: grid;
  gap: 6px;
  margin-top: 14px;
}

.lesson-link {
  display: grid;
  min-height: 50px;
  grid-template-columns: 30px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 10px;
  color: inherit;
  font-size: 0.78rem;
  text-decoration: none;
}

.lesson-link:hover {
  background: var(--color-green-soft);
}

.lesson-number {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  font: 500 0.63rem var(--font-mono);
}

.is-done .lesson-number {
  border-color: var(--color-green);
  background: var(--color-green);
  color: white;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 188px;
  gap: 18px;
}

.lesson-steps {
  position: sticky;
  top: 24px;
  align-self: start;
}

.step-button {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  gap: 9px;
  padding: 0 10px;
  border-radius: 10px;
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 650;
  text-align: left;
}

.step-button[aria-current="step"] {
  background: var(--color-green-soft);
  color: var(--color-green-deep);
}

.chunk-list,
.comic,
.pattern-list,
.quiz-list,
.session-list,
.timeline {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.chunk,
.comic-line,
.pattern,
.quiz-question,
.session-item,
.timeline-item {
  padding: 14px;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: var(--color-surface);
}

.chunk {
  display: grid;
  min-height: 70px;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
}

.chunk-en {
  display: block;
  font: 600 1.12rem var(--font-display);
}

.chunk-pt {
  display: block;
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 0.74rem;
}

.comic-line {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px;
}

.speaker {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  background: var(--color-green-soft);
  color: var(--color-green-deep);
  font-weight: 800;
}

.grammar-table {
  width: 100%;
  margin-top: 14px;
  overflow: hidden;
  border-collapse: collapse;
  border-radius: 10px;
  font-size: 0.78rem;
}

.grammar-table th,
.grammar-table td {
  padding: 10px;
  border: 1px solid var(--color-line);
  text-align: left;
}

.grammar-table th {
  background: var(--color-surface-muted);
  font: 600 0.65rem var(--font-mono);
  text-transform: uppercase;
}

mark {
  border-radius: 3px;
  background: var(--color-brass-soft);
  color: var(--color-ink);
}

.error-list {
  padding-left: 0;
  list-style: none;
}

.error-list li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: 0.8rem;
}

.option {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  gap: 9px;
  margin-top: 7px;
  padding: 8px 12px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: var(--color-surface);
  text-align: left;
}

.option.is-correct {
  border-color: var(--color-green);
  background: var(--color-green-soft);
}

.option.is-wrong {
  border-color: var(--color-danger);
  background: var(--color-danger-soft);
}

.session-item {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 12px;
}

.session-type {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--color-green-soft);
  color: var(--color-green-deep);
  font: 700 0.9rem var(--font-mono);
}

.review-card {
  padding: clamp(22px, 6vw, 50px);
  text-align: center;
}

.review-front {
  min-height: 160px;
  margin: 22px 0;
  font: 600 clamp(1.8rem, 5vw, 3rem)/1.1 var(--font-display);
}

.review-back {
  margin-top: 12px;
  color: var(--color-green);
  font-size: 1rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.stat {
  padding: 15px;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: var(--color-surface);
}

.stat-value {
  display: block;
  margin-top: 5px;
  font: 600 1.55rem var(--font-display);
}

.bars {
  display: flex;
  min-height: 130px;
  align-items: end;
  gap: 8px;
  padding-top: 14px;
}

.bar {
  display: flex;
  min-width: 16px;
  flex: 1;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  color: var(--color-muted);
  font: 500 0.52rem var(--font-mono);
}

.bar-fill {
  width: 100%;
  max-width: 22px;
  min-height: 3px;
  border-radius: 6px 6px 2px 2px;
  background: var(--color-green);
}

.form-grid {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--color-ink-soft);
  font-size: 0.75rem;
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: var(--color-surface);
}

textarea {
  min-height: 110px;
  resize: vertical;
}

.notice {
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--color-brass) 34%, transparent);
  border-radius: 11px;
  background: var(--color-brass-soft);
  color: var(--color-ink-soft);
  font-size: 0.77rem;
  line-height: 1.5;
}

.notice-success {
  border-color: color-mix(in srgb, var(--color-green) 34%, transparent);
  background: var(--color-green-soft);
}

.bottom-nav {
  display: none;
}

.modal {
  position: fixed;
  z-index: 50;
  inset: 0;
  display: grid;
  padding: 18px;
  place-items: center;
  background: rgba(31, 28, 23, 0.55);
  backdrop-filter: blur(6px);
}

.modal-card {
  width: min(100%, 450px);
  max-height: 88vh;
  overflow: auto;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  box-shadow: 0 30px 80px -20px rgba(31, 28, 23, 0.65);
}

.toast {
  position: fixed;
  z-index: 80;
  bottom: 24px;
  left: 50%;
  max-width: min(90vw, 520px);
  padding: 12px 16px;
  border-radius: 99px;
  background: var(--color-ink);
  box-shadow: var(--shadow-md);
  color: var(--color-bg);
  font-size: 0.78rem;
  transform: translateX(-50%);
  animation: toast-in 0.22s ease both;
}

.login-screen {
  display: grid;
  min-height: 100vh;
  padding: 24px;
  place-items: center;
}

.login-card {
  width: min(100%, 520px);
  padding: clamp(26px, 6vw, 50px);
  border: 1px solid var(--color-line);
  border-radius: 30px;
  background: rgba(253, 251, 245, 0.93);
  box-shadow: 0 28px 80px -34px rgba(31, 28, 23, 0.5);
  text-align: center;
}

.login-card .brand-mark {
  width: 58px;
  height: 58px;
  margin: 0 auto 22px;
  font-size: 20px;
}

.login-card h1 {
  margin-bottom: 7px;
  font-size: clamp(2.2rem, 8vw, 3.5rem);
  line-height: 0.92;
}

.login-card p {
  color: var(--color-muted);
  line-height: 1.55;
}

.offline-indicator {
  position: fixed;
  z-index: 40;
  top: 12px;
  left: 50%;
  padding: 7px 12px;
  border-radius: 99px;
  background: var(--color-brass);
  color: white;
  font: 600 0.63rem var(--font-mono);
  transform: translateX(-50%);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

#screen {
  animation: page-in 0.26s ease both;
}

.cinema-mode {
  display: block;
}

.cinema-mode .sidebar,
.cinema-mode .right-rail {
  display: none;
}

.cinema-mode .main {
  max-width: 920px;
  min-height: 100vh;
  padding-top: clamp(30px, 7vh, 84px);
}

.cinema-mode .lesson-layout {
  grid-template-columns: 1fr;
}

.cinema-mode .lesson-steps {
  position: static;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-row: 1;
}

@media (max-width: 1180px) {
  .app-shell {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .right-rail {
    display: none;
  }
}

@media (max-width: 780px) {
  body {
    padding-bottom: 76px;
  }

  .app-shell {
    display: block;
  }

  .sidebar,
  .right-rail {
    display: none;
  }

  .main {
    padding: 24px 16px 40px;
  }

  .page-head {
    align-items: start;
  }

  .page-title {
    font-size: 2.3rem;
  }

  .blocks-grid,
  .course-grid,
  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .block-card {
    min-height: 0;
  }

  .lesson-steps {
    position: static;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-row: 1;
    gap: 3px;
    overflow-x: auto;
  }

  .step-button {
    min-width: 70px;
    justify-content: center;
    padding: 0 4px;
    font-size: 0.65rem;
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .bottom-nav {
    position: fixed;
    z-index: 30;
    right: 10px;
    bottom: 10px;
    left: 10px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    padding: 6px;
    border: 1px solid var(--color-line);
    border-radius: 18px;
    background: rgba(253, 251, 245, 0.94);
    box-shadow: 0 18px 40px -20px rgba(31, 28, 23, 0.5);
    backdrop-filter: blur(16px);
  }

  .bottom-nav a {
    display: grid;
    min-height: 50px;
    place-items: center;
    border-radius: 12px;
    color: var(--color-muted);
    font: 600 0.54rem var(--font-mono);
    text-decoration: none;
  }

  .bottom-nav a[aria-current="page"] {
    background: var(--color-green-soft);
    color: var(--color-green-deep);
  }

  .bottom-nav span {
    display: block;
    font-size: 1rem;
  }

  .session-item {
    grid-template-columns: 42px 1fr;
  }

  .session-item .button {
    grid-column: 1 / -1;
  }
}

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

@media print {
  .sidebar,
  .right-rail,
  .bottom-nav,
  .button {
    display: none !important;
  }

  .app-shell {
    display: block;
  }
}