:root {
  --bg: #f2f2f7;
  --bg-soft: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.94);
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --line: rgba(60, 60, 67, 0.18);
  --line-strong: rgba(52, 199, 89, 0.24);
  --text: #0f1728;
  --muted: rgba(60, 60, 67, 0.76);
  --accent: #007aff;
  --accent-dark: #0057d9;
  --accent-soft: rgba(0, 122, 255, 0.11);
  --present: #007aff;
  --present-soft: rgba(0, 122, 255, 0.12);
  --past: #34c759;
  --past-soft: rgba(52, 199, 89, 0.12);
  --future: #af52de;
  --future-soft: rgba(175, 82, 222, 0.12);
  --warm: #34c759;
  --warm-dark: #1f9f45;
  --warm-soft: rgba(52, 199, 89, 0.14);
  --warm-deep: #17803a;
  --success: #34c759;
  --success-soft: rgba(52, 199, 89, 0.12);
  --danger: #d44747;
  --danger-soft: #fff1f1;
  --gold: #34c759;
  --sea: #5ac8fa;
  --shadow: 0 18px 42px rgba(15, 23, 40, 0.08);
  --radius: 22px;
  --max-width: 1520px;
  --font-serif: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", sans-serif;
  --font-sans: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  overflow-x: clip;
  background:
    linear-gradient(180deg, #ff9944 0%, #ff9944 100%),
    radial-gradient(circle at 50% 0%, rgba(255, 214, 176, 0.72), transparent 22%),
    radial-gradient(circle at 10% 0%, rgba(90, 200, 250, 0.09), transparent 18%),
    radial-gradient(circle at 50% -8%, rgba(52, 199, 89, 0.05), transparent 18%),
    radial-gradient(circle at 84% 2%, rgba(52, 199, 89, 0.06), transparent 20%),
    linear-gradient(180deg, rgba(248, 248, 252, 0.94) 0%, rgba(242, 242, 247, 0.9) 38%, rgba(239, 241, 248, 0.9) 100%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

code {
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.95em;
  background: rgba(0, 122, 255, 0.08);
  border: 1px solid rgba(0, 122, 255, 0.1);
  border-radius: 0.55rem;
  padding: 0.14rem 0.36rem;
}

.progress-bar {
  position: fixed;
  inset: 0 0 auto;
  height: 4px;
  z-index: 999;
  background: rgba(20, 32, 51, 0.06);
}

.progress-bar span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--success) 48%, var(--gold) 100%);
  transition: width 140ms linear;
}

.hero {
  position: relative;
  min-height: clamp(21rem, 44svh, 28rem);
  padding:
    max(0.75rem, env(safe-area-inset-top))
    clamp(1.2rem, 3vw, 2.4rem)
    max(1.1rem, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  overflow: hidden;
}

.hero__backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 153, 68, 0.78), rgba(255, 153, 68, 0.78)),
    radial-gradient(circle at 50% -6%, rgba(255, 153, 68, 0.18), transparent 28%),
    radial-gradient(circle at 82% 20%, rgba(0, 122, 255, 0.08), transparent 16%),
    radial-gradient(circle at 22% 22%, rgba(52, 199, 89, 0.07), transparent 22%);
  backdrop-filter: blur(20px) saturate(135%);
}

.hero::after {
  content: "";
}

.hero__topbar,
.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.hero__topbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  min-height: 2.4rem;
}

.topbar-levels {
  min-width: 0;
  display: flex;
  justify-content: center;
}

.brand,
.hero__jump,
.hero__plain-meta,
.hero__lead,
.eyebrow {
  animation: riseIn 0.8s ease both;
}

.brand {
  margin: 0;
  color: rgba(60, 60, 67, 0.58);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.brand--home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0 1.2rem;
  border-radius: 999px;
  background: linear-gradient(180deg, #3d94ff 0%, #007aff 100%);
  border: 0;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(0, 122, 255, 0.2);
}

.hero__jump {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0 1rem;
  border-radius: 999px;
  background: linear-gradient(180deg, #3d94ff 0%, #007aff 100%);
  color: #ffffff;
  text-decoration: none;
  border: 0;
  box-shadow: 0 10px 24px rgba(0, 122, 255, 0.18);
}

.family-present {
  --family-color: var(--present);
  --family-soft: var(--present-soft);
  --family-text: #0057d9;
}

.family-past {
  --family-color: var(--past);
  --family-soft: var(--past-soft);
  --family-text: #1f9f45;
}

.family-future {
  --family-color: var(--future);
  --family-soft: var(--future-soft);
  --family-text: #8f39c5;
}

.hero__inner {
  display: grid;
  align-content: start;
  min-height: auto;
  max-width: 720px;
  padding-top: clamp(0.55rem, 2vh, 1rem);
  gap: 0;
}

.eyebrow,
.section__eyebrow {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: rgba(120, 120, 128, 0.82);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.3vw, 4.35rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
  color: #101828;
  animation: riseIn 1s ease 0.08s both;
}

.hero__lead {
  max-width: 640px;
  margin: 0.72rem 0 0;
  color: rgba(60, 60, 67, 0.8);
  font-size: clamp(0.98rem, 1.2vw, 1.08rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
  animation: riseIn 1s ease 0.16s both;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0 1.2rem;
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: linear-gradient(180deg, #3d94ff 0%, #007aff 100%);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(0, 122, 255, 0.2);
}

.button--ghost {
  border: 1px solid rgba(60, 60, 67, 0.12);
  background: rgba(255, 255, 255, 0.85);
  color: var(--text);
}

.button--secondary {
  background: rgba(52, 199, 89, 0.12);
  color: var(--warm-dark);
  border: 1px solid rgba(52, 199, 89, 0.18);
}

.button--small {
  min-height: 2.8rem;
  padding: 0 1rem;
}

.hero__plain-meta {
  margin: 0.8rem 0 0;
  max-width: 620px;
  color: var(--muted);
  font-size: 0.94rem;
}

.mode-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.95rem;
  padding: 0.26rem;
  width: fit-content;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(61, 148, 255, 0.88) 0%, rgba(0, 122, 255, 0.88) 100%);
  border: 1px solid rgba(0, 122, 255, 0.22);
  backdrop-filter: blur(18px) saturate(135%);
  box-shadow: 0 10px 22px rgba(0, 122, 255, 0.14);
}

.mode-switch__button {
  min-height: 2.7rem;
  padding: 0 1rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.mode-switch__button:hover {
  transform: translateY(-1px);
}

.mode-switch__button.is-active {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 4px rgba(15, 23, 40, 0.1);
  color: var(--text);
}

.page {
  width: min(var(--max-width), calc(100% - 2.4rem));
  margin: 0 auto 4rem;
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: clamp(1rem, 2.1vw, 2rem);
  position: relative;
  z-index: 2;
}

.sidebar {
  position: static;
  align-self: start;
  display: grid;
  gap: 0.85rem;
}

.sidebar__section {
  margin: 0;
  border-radius: 20px;
  background: var(--bg-elevated);
  border: 1px solid rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sidebar__summary {
  list-style: none;
  cursor: pointer;
  padding: 0.92rem 0.95rem;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(120, 120, 128, 0.94);
  background: rgba(255, 255, 255, 0.72);
}

.sidebar__summary::-webkit-details-marker {
  display: none;
}

.sidebar__summary::after {
  content: "▾";
  float: right;
  color: rgba(120, 120, 128, 0.9);
  transition: transform 160ms ease;
}

.sidebar__section:not([open]) .sidebar__summary::after {
  transform: rotate(-90deg);
}

.section,
.tense,
.sidebar__block,
#framework,
#principles,
#legend,
#toolkit,
#quick-review,
#comparisons,
#flashcards,
#extras,
#study-plan,
#test-runner {
  scroll-margin-top: 1rem;
}

.sidebar__block,
.section,
.tense {
  background: var(--panel);
  backdrop-filter: blur(18px) saturate(125%);
  border: 1px solid rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow);
}

.sidebar__block {
  border-radius: 20px;
  padding: 0.9rem;
  background: transparent;
  border: 0;
  box-shadow: none;
}

nav.sidebar__block {
  padding: 0.55rem 0.55rem 0.35rem;
}

.sidebar__label {
  display: block;
  margin: 0 0 0.6rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(120, 120, 128, 0.94);
}

.sidebar__search {
  width: 100%;
  min-height: 2.86rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(118, 118, 128, 0.1);
  padding: 0 0.95rem 0 1rem;
  color: var(--text);
  font: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.sidebar__search:focus-visible {
  outline: 2px solid rgba(0, 122, 255, 0.18);
  outline-offset: 2px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter {
  min-height: 2.15rem;
  padding: 0 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: all 160ms ease;
}

.filter:hover,
.filter[aria-pressed="true"] {
  background: rgba(52, 199, 89, 0.12);
  border-color: rgba(52, 199, 89, 0.22);
  color: var(--warm-dark);
}

.toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.16rem;
  max-height: none;
  overflow: visible;
  padding-top: 0.08rem;
}

.toc a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.82rem 0.82rem;
  border-radius: 14px;
  border-bottom: 1px solid rgba(60, 60, 67, 0.08);
  text-decoration: none;
  color: var(--text);
  transition: background 180ms ease, color 180ms ease, transform 180ms ease, padding 180ms ease;
}

.toc a:hover,
.toc a.is-active {
  color: var(--accent-dark);
  transform: none;
}

.toc__meta {
  display: grid;
  gap: 0.18rem;
  min-width: 0;
}

.toc__family {
  display: block;
  font-size: 0.68rem;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
}

.toc__name {
  display: block;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: left;
}

.toc a::after {
  content: "›";
  color: rgba(120, 120, 128, 0.78);
  font-size: 1.08rem;
  line-height: 1;
}

.toc li[data-family="present"] a {
  background: var(--present-soft);
  box-shadow: inset 3px 0 0 rgba(0, 122, 255, 0.18);
}

.toc li[data-family="present"] a.is-active,
.toc li[data-family="present"] a:hover {
  background: rgba(0, 122, 255, 0.16);
  color: var(--accent-dark);
}

.toc li[data-family="present"] .toc__family,
.toc li[data-family="present"] .toc__name {
  color: #4c8dff;
}

.toc li[data-family="past"] a {
  background: var(--past-soft);
  box-shadow: inset 3px 0 0 rgba(52, 199, 89, 0.18);
}

.toc li[data-family="past"] a.is-active,
.toc li[data-family="past"] a:hover {
  background: rgba(52, 199, 89, 0.16);
  color: #1f9f45;
}

.toc li[data-family="past"] .toc__family,
.toc li[data-family="past"] .toc__name {
  color: #34a853;
}

.toc li[data-family="future"] a {
  background: var(--future-soft);
  box-shadow: inset 3px 0 0 rgba(175, 82, 222, 0.18);
}

.toc li[data-family="future"] a.is-active,
.toc li[data-family="future"] a:hover {
  background: rgba(175, 82, 222, 0.16);
  color: #8f39c5;
}

.toc li[data-family="future"] .toc__family,
.toc li[data-family="future"] .toc__name {
  color: #a264d7;
}

.toc li:last-child a {
  border-bottom: 0;
}

.content {
  display: grid;
  gap: 0.95rem;
}

.tests-hub {
  grid-column: 1 / -1;
  display: grid;
  gap: 1.2rem;
}

.section,
.tense {
  padding: clamp(1.2rem, 2.4vw, 1.7rem);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.section__header {
  margin-bottom: 1rem;
}

.section__eyebrow {
  color: rgba(120, 120, 128, 0.9);
}

.section h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 2.3vw, 2.2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.framework,
.legend {
  display: grid;
  gap: 1rem;
  color: var(--muted);
}

.aspect-grid,
.principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}

.aspect-grid article,
.principles article {
  padding: 1.1rem 1.15rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.aspect-grid__label {
  margin: 0 0 0.4rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--warm-dark);
}

.aspect-grid h3,
.principles h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.principles p,
.aspect-grid p {
  margin: 0;
  color: var(--muted);
}

.tenses {
  display: grid;
  gap: 1.2rem;
}

.tense {
  position: relative;
  overflow: hidden;
}

.tense::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--family-color, var(--accent)), var(--family-color, var(--accent)));
}

.tense__header {
  display: grid;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.tense__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.75rem;
  border-radius: 999px;
  background: rgba(120, 120, 128, 0.1);
  color: rgba(60, 60, 67, 0.92);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.family-present .chip:first-child,
.family-past .chip:first-child,
.family-future .chip:first-child {
  background: var(--family-soft);
  color: var(--family-text);
}

.tense__title-wrap {
  display: grid;
  gap: 0.35rem;
}

.tense__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.tense__subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  display: block;
}

.tense__core {
  margin: 0;
  font-size: 1.06rem;
  color: var(--text);
  max-width: 70ch;
  display: block;
}

.tense__content {
  margin-top: 1rem;
}

.tense {
  display: none;
}

.tense.is-current {
  display: block;
}

.tense__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 0.85rem;
  margin-top: 1rem;
}

.tense__block {
  padding: 0.95rem 1rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.tense__block--guide {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 255, 0.96));
  border-color: rgba(60, 60, 67, 0.08);
}

.tense__block--practice {
  border-color: rgba(52, 199, 89, 0.12);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244, 251, 246, 0.96));
}

.family-present .tense__block--practice {
  border-color: var(--present-soft);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244, 249, 255, 0.96));
}

.family-past .tense__block--practice {
  border-color: var(--past-soft);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244, 251, 246, 0.96));
}

.family-future .tense__block--practice {
  border-color: var(--future-soft);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(249, 244, 255, 0.96));
}

.tense__block h3 {
  margin: 0 0 0.8rem;
  font-size: 1rem;
}

.tense__block ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.tense__block li + li {
  margin-top: 0.45rem;
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.keyword {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.7rem;
  border: 1px solid var(--family-soft, rgba(52, 199, 89, 0.16));
  border-radius: 999px;
  background: var(--family-soft, rgba(52, 199, 89, 0.12));
  color: var(--family-text, var(--warm-dark));
  font-size: 0.86rem;
}

.keywords-note {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.guide-text {
  display: grid;
  gap: 0.85rem;
}

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

.tense-insights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.tense-insight {
  padding: 0.92rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.tense-insight__label {
  margin: 0 0 0.45rem;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(120, 120, 128, 0.9);
}

.tense-insight p:last-child {
  margin: 0;
  color: var(--muted);
}

.tense-insight--memory {
  background: linear-gradient(180deg, rgba(0, 122, 255, 0.08), rgba(255, 255, 255, 0.98));
}

.tense-insight--trap {
  background: linear-gradient(180deg, rgba(255, 149, 0, 0.09), rgba(255, 255, 255, 0.98));
}

.tense-insight--nuance {
  background: linear-gradient(180deg, rgba(52, 199, 89, 0.08), rgba(255, 255, 255, 0.98));
}

.syntax-showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  margin-top: 0.7rem;
}

.syntax-card {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 249, 255, 0.96));
  border: 1px solid rgba(60, 60, 67, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.syntax-card__top {
  display: grid;
  gap: 0.55rem;
}

.syntax-card__examples {
  display: grid;
  gap: 0.7rem;
}

.syntax-example {
  padding: 0.82rem 0.9rem;
  border-radius: 14px;
  background: rgba(248, 248, 252, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.syntax-example__en,
.syntax-example__pl {
  margin: 0;
}

.syntax-example__en {
  font-weight: 700;
}

.syntax-example__pl {
  margin-top: 0.32rem;
  color: var(--muted);
}

.syntax__formula--pl {
  margin-top: 0.38rem;
}

.syntax-extra {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.syntax {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.syntax__row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(60, 60, 67, 0.08);
}

.syntax__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.syntax__label {
  width: fit-content;
  min-height: 2.1rem;
  padding: 0 0.85rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  text-transform: none;
  letter-spacing: -0.01em;
  background: var(--family-soft, rgba(0, 122, 255, 0.1));
  color: var(--family-text, var(--accent-dark));
}

.syntax__formula {
  margin: 0;
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Consolas", monospace;
  font-size: 0.98rem;
  white-space: normal;
}

.syntax__formula code {
  display: inline-block;
  max-width: 100%;
  line-height: 1.5;
}

.syntax__note {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.family-present .example__tag,
.family-present .button--secondary {
  color: var(--accent-dark);
}

.family-past .example__tag,
.family-past .button--secondary {
  color: #1f9f45;
}

.family-future .example__tag,
.family-future .button--secondary {
  color: #8f39c5;
}

.family-present .button--secondary {
  background: var(--present-soft);
  border-color: rgba(0, 122, 255, 0.18);
}

.family-past .button--secondary {
  background: var(--past-soft);
  border-color: rgba(52, 199, 89, 0.18);
}

.family-future .button--secondary {
  background: var(--future-soft);
  border-color: rgba(175, 82, 222, 0.18);
}

.detail-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.detail-group {
  padding: 1rem 1.05rem;
  border-radius: 18px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.detail-group h3 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
}

.detail-group ul {
  margin: 0;
  padding-left: 1rem;
  color: var(--muted);
}

.detail-group li + li {
  margin-top: 0.45rem;
}

.examples {
  margin-top: 1rem;
  display: grid;
  gap: 0.8rem;
}

.example {
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: linear-gradient(90deg, rgba(0, 122, 255, 0.08), rgba(255, 255, 255, 0.98));
}

.example p {
  margin: 0;
}

.example__en {
  font-weight: 600;
}

.example__pl {
  color: var(--muted);
}

.example__tag {
  margin-top: 0.35rem;
  font-size: 0.84rem;
  color: var(--accent);
}

.mistakes,
.mini-test {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.mistake-card,
.comparison-card,
.quiz-item {
  border-radius: 18px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.mistake-card {
  padding: 0.95rem 1rem;
}

.mistake-card p {
  margin: 0;
}

.mistake-card__right {
  margin-top: 0.35rem !important;
  color: var(--accent-dark);
}

.mistake-card__explanation {
  margin-top: 0.45rem !important;
  color: var(--muted);
}

.comparison-card {
  padding: 1rem 1.05rem;
}

.comparison-card__title {
  margin: 0 0 0.7rem;
}

.comparison-card ul {
  margin: 0;
  padding-left: 1.05rem;
  color: var(--muted);
}

.comparison-card li + li {
  margin-top: 0.45rem;
}

.quiz-item {
  overflow: hidden;
}

.quiz-item summary {
  cursor: pointer;
  padding: 0.95rem 1rem;
  font-weight: 700;
  list-style: none;
}

.quiz-item summary::-webkit-details-marker {
  display: none;
}

.quiz-item summary::after {
  content: "+";
  float: right;
  color: var(--accent-dark);
  font-size: 1.15rem;
  line-height: 1;
}

.quiz-item[open] summary::after {
  content: "−";
}

.quiz-item__answer {
  padding: 0 1rem 1rem;
  color: var(--muted);
}

.quiz-item__answer p {
  margin: 0;
}

.quiz-item__answer p + p {
  margin-top: 0.45rem;
}

.compare {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.compare strong {
  color: var(--text);
}

.practice-card {
  display: grid;
  gap: 0.9rem;
}

.practice-card p {
  margin: 0;
  color: var(--muted);
}

.tests-hub__lead,
.test-intro p,
.tests-empty {
  margin: 0;
  color: var(--muted);
}

.test-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.25rem;
}

.test-options__button {
  min-height: 2.5rem;
  padding: 0 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(60, 60, 67, 0.1);
  background: rgba(255, 255, 255, 0.96);
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.test-options__button:hover {
  transform: translateY(-1px);
}

.test-options__button.is-active {
  background: var(--warm-soft);
  border-color: rgba(52, 199, 89, 0.2);
  color: var(--warm-dark);
}

.test-selector {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.test-card {
  display: grid;
  gap: 0.42rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.test-card:hover {
  transform: translateY(-2px);
  border-color: rgba(75, 120, 209, 0.2);
  box-shadow: 0 14px 30px rgba(25, 72, 140, 0.08);
}

.test-card.is-active {
  border-color: rgba(52, 199, 89, 0.18);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244, 251, 246, 0.96));
  box-shadow: 0 12px 24px rgba(17, 24, 39, 0.08);
}

.test-card strong {
  font-size: 1rem;
}

.test-card span,
.test-card small {
  color: var(--muted);
}

.test-card__eyebrow {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--warm-dark) !important;
}

.test-content {
  display: grid;
  gap: 1rem;
}

.test-intro {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.test-results {
  min-height: 0;
}

.test-results__card {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(0, 122, 255, 0.08), rgba(244, 251, 246, 0.92));
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.test-dashboard__grid,
.level-scope__grid,
.appendix-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.test-dashboard__card,
.level-scope__hero,
.level-scope__card,
.appendix-card {
  padding: 1rem 1.05rem;
  border-radius: 20px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.test-dashboard__card {
  display: grid;
  gap: 0.35rem;
}

.test-dashboard__card span,
.level-scope__hero p,
.level-scope__card li,
.appendix-card li {
  color: var(--muted);
}

.test-dashboard__card strong {
  font-size: 1.12rem;
}

.level-scope {
  display: grid;
  gap: 0.85rem;
}

.level-scope__hero {
  background: linear-gradient(180deg, rgba(0, 122, 255, 0.08), rgba(255, 255, 255, 0.98));
}

.level-scope__hero p {
  margin: 0;
}

.level-scope__card h3,
.appendix-card h3 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
}

.level-scope__card ul,
.appendix-card ul {
  margin: 0;
  padding-left: 1rem;
}

.level-scope__card li + li,
.appendix-card li + li {
  margin-top: 0.45rem;
}

.appendix-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 255, 0.96));
}

.comparison-matrix__wrap {
  overflow-x: auto;
}

.comparison-matrix__table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

.comparison-matrix__table th,
.comparison-matrix__table td {
  padding: 0.85rem 0.9rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(60, 60, 67, 0.08);
}

.comparison-matrix__table th {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(120, 120, 128, 0.94);
}

.comparison-matrix__table td {
  color: var(--muted);
}

.comparison-matrix__table strong {
  color: var(--text);
}

.test-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 0.35rem;
}

.test-toolbar__progress {
  min-width: min(320px, 100%);
  flex: 1 1 260px;
  display: grid;
  gap: 0.42rem;
}

.test-toolbar__progress span {
  color: var(--muted);
  font-size: 0.92rem;
}

.test-toolbar__bar {
  height: 0.6rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(15, 23, 40, 0.08);
}

.test-toolbar__bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--present) 0%, var(--success) 100%);
}

.test-toolbar__actions,
.test-question__quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.is-active-toggle {
  background: rgba(0, 122, 255, 0.12);
  border-color: rgba(0, 122, 255, 0.16);
  color: var(--accent-dark);
}

.test-form,
.test-questions {
  display: grid;
  gap: 1rem;
}

.test-question {
  display: grid;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(60, 60, 67, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.test-question.is-focused {
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.12);
  border-color: rgba(0, 122, 255, 0.18);
}

.test-question[data-family="present"] {
  --question-color: var(--present);
  --question-soft: var(--present-soft);
  --question-text: #0057d9;
}

.test-question[data-family="past"] {
  --question-color: var(--past);
  --question-soft: var(--past-soft);
  --question-text: #1f9f45;
}

.test-question[data-family="future"] {
  --question-color: var(--future);
  --question-soft: var(--future-soft);
  --question-text: #8f39c5;
}

.test-question.is-correct {
  border-color: rgba(52, 199, 89, 0.3);
  background: var(--success-soft);
}

.test-question.is-wrong {
  border-color: rgba(212, 71, 71, 0.28);
  background: var(--danger-soft);
}

.test-question__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.test-question__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--question-color, var(--accent)) 78%, white) 0%, var(--question-color, var(--accent)) 100%);
  color: #ffffff;
  font-weight: 700;
}

.test-question__badge {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.72rem;
  border-radius: 999px;
  background: var(--question-soft, rgba(0, 122, 255, 0.1));
  color: var(--question-text, var(--accent-dark));
  font-size: 0.95rem;
  font-weight: 700;
}

.test-question__prompt {
  margin: 0;
  font-size: 1rem;
}

.test-question__infinitive {
  color: var(--question-text, var(--warm-dark));
  font-weight: 700;
  white-space: nowrap;
}

.test-question__hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  padding: 0.78rem 0.9rem;
  border-radius: 14px;
  background: rgba(52, 199, 89, 0.1);
  border: 1px solid rgba(52, 199, 89, 0.14);
}

.test-hint-toggle {
  width: fit-content;
  min-height: 2.3rem;
  padding: 0 0.82rem;
  border-radius: 999px;
  border: 1px solid rgba(60, 60, 67, 0.12);
  background: rgba(248, 248, 252, 1);
  color: var(--accent-dark);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.test-hint-toggle:hover {
  transform: translateY(-1px);
}

.test-hint-toggle[aria-expanded="true"] {
  background: var(--warm-soft);
  border-color: rgba(52, 199, 89, 0.18);
  color: var(--warm-dark);
}

.test-input {
  width: 100%;
  min-height: 3.2rem;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(60, 60, 67, 0.14);
  background: rgba(248, 248, 252, 1);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.test-input:focus-visible {
  outline: 2px solid rgba(0, 122, 255, 0.16);
  outline-offset: 2px;
  border-color: rgba(0, 122, 255, 0.22);
}

.test-feedback {
  display: grid;
  gap: 0.35rem;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  border: 1px solid rgba(212, 71, 71, 0.16);
  background: rgba(255, 255, 255, 0.84);
  color: var(--danger);
}

.test-feedback p {
  margin: 0;
}

.test-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.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;
}

.study-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.75rem;
  color: var(--muted);
}

#framework.is-compact-level .framework p:last-child,
#legend.is-compact-level .legend p:nth-child(n + 4) {
  display: none;
}

#principles.is-compact-level .principles article:nth-child(n + 3),
#study-plan.is-compact-level .study-list li:nth-child(n + 5) {
  display: none;
}

.empty-state {
  margin: 0;
  padding: 1.2rem 1.3rem;
  border-radius: 18px;
  border: 1px dashed var(--line-strong);
  background: linear-gradient(180deg, #f4fbf6, #ffffff);
  color: var(--muted);
}

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

.extra-card,
.summary-table-block {
  padding: 1.1rem 1.15rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.extra-card h3,
.summary-table-block h3 {
  margin: 0 0 0.7rem;
}

.extra-card p {
  margin: 0;
  color: var(--muted);
}

.extra-card p + p {
  margin-top: 0.7rem;
}

.extra-card ul {
  margin: 0.8rem 0 0;
  padding-left: 1rem;
  color: var(--muted);
}

.extra-card li + li {
  margin-top: 0.45rem;
}

.summary-table-block {
  margin-top: 1rem;
}

.summary-table-wrap {
  overflow-x: auto;
  margin-top: 0.8rem;
}

.summary-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

.summary-table th,
.summary-table td {
  padding: 0.8rem 0.9rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(60, 60, 67, 0.08);
}

.summary-table th {
  color: var(--warm-dark);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.summary-table td {
  color: var(--muted);
}

.progress-widget {
  display: grid;
  gap: 0.8rem;
}

.progress-widget__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.progress-widget__stats article,
.tool-card,
.review-card,
.comparison-sheet,
.flashcard,
.comparison-side {
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.progress-widget__stats article {
  padding: 0.85rem;
  display: grid;
  gap: 0.18rem;
}

.progress-widget__stats strong {
  font-size: 1.32rem;
}

.progress-widget__stats span,
.progress-widget__note,
.progress-widget__empty,
.tool-note,
.comparison-sheet__question,
.comparison-side__rule,
.review-card__focus p:last-child {
  color: var(--muted);
}

.progress-widget__bar {
  height: 0.55rem;
  border-radius: 999px;
  background: rgba(15, 23, 40, 0.08);
  overflow: hidden;
}

.progress-widget__bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent) 0%, var(--success) 100%);
}

.progress-widget__note {
  margin: 0;
  font-size: 0.9rem;
}

.progress-widget__weak {
  display: grid;
  gap: 0.45rem;
}

.progress-widget__weak p,
.review-card__eyebrow,
.comparison-side__label,
.flashcard__type {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  color: rgba(120, 120, 128, 0.9);
}

.weak-link {
  width: fit-content;
  border: 0;
  background: transparent;
  color: var(--accent-dark);
  font: inherit;
  font-weight: 600;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

.review-picker,
.comparison-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.review-pill,
.comparison-pill,
.level-switch__button {
  min-height: 2.35rem;
  padding: 0 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(60, 60, 67, 0.1);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.review-pill:hover,
.comparison-pill:hover,
.level-switch__button:hover {
  transform: translateY(-1px);
}

.toolkit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.tool-card {
  padding: 1rem 1.05rem;
  display: grid;
  gap: 0.8rem;
}

.tool-card h3,
.comparison-sheet__takeaways h3 {
  margin: 0;
  font-size: 1rem;
}

.tool-actions,
.flashcards-toolbar,
.flashcards-toolbar__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.level-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.level-switch--topbar {
  justify-content: center;
  padding: 0.22rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.26);
  backdrop-filter: blur(18px) saturate(140%);
  max-width: 100%;
}

.level-switch--topbar .level-switch__button {
  min-height: 2.25rem;
  padding: 0 0.82rem;
  background: transparent;
  color: rgba(16, 24, 40, 0.78);
  border-color: transparent;
  font-size: 0.85rem;
  white-space: nowrap;
}

.level-switch--topbar .level-switch__button.is-active {
  background: rgba(255, 255, 255, 0.98);
  color: var(--accent-dark);
  border-color: rgba(255, 255, 255, 0.42);
  box-shadow: 0 8px 18px rgba(15, 23, 40, 0.08);
}

.level-switch__button.is-active {
  background: linear-gradient(180deg, #3d94ff 0%, #007aff 100%);
  color: #ffffff;
  border-color: rgba(0, 122, 255, 0.18);
  box-shadow: 0 10px 22px rgba(0, 122, 255, 0.14);
}

.review-pill.is-active,
.comparison-pill.is-active {
  background: rgba(0, 122, 255, 0.12);
  color: var(--accent-dark);
  border-color: rgba(0, 122, 255, 0.18);
}

.review-pill.family-present.is-active,
.comparison-side.family-present {
  background: rgba(0, 122, 255, 0.1);
}

.review-pill.family-past.is-active,
.comparison-side.family-past {
  background: rgba(52, 199, 89, 0.1);
}

.review-pill.family-future.is-active,
.comparison-side.family-future {
  background: rgba(175, 82, 222, 0.1);
}

.review-card,
.comparison-sheet,
.flashcard {
  margin-top: 0.95rem;
  padding: 1rem 1.05rem;
}

.review-card__top,
.review-card__example,
.example__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.9rem;
}

.review-card h3,
.flashcard h3 {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
  line-height: 1.1;
}

.review-card__core,
.review-card__example-en,
.review-card__example-pl,
.example__en,
.example__pl,
.comparison-sheet__question {
  margin: 0;
}

.review-card__grid,
.comparison-sheet__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.9rem;
}

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

.review-card__grid section,
.review-card__focus,
.review-card__example,
.comparison-sheet__takeaways,
.comparison-side {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(248, 248, 252, 0.92);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.review-card__grid h4,
.review-card__focus-title {
  margin: 0 0 0.55rem;
  font-size: 0.94rem;
}

.review-card__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.review-card__focus {
  margin-top: 0.9rem;
}

.review-card__focus-title {
  color: var(--family-text, var(--accent-dark));
}

.review-card__example {
  margin-top: 0.9rem;
}

.comparison-side {
  display: grid;
  gap: 0.7rem;
}

.comparison-side ul,
.comparison-sheet__takeaways ul {
  margin: 0;
  padding-left: 1rem;
  color: var(--muted);
}

.flashcards-toolbar {
  align-items: center;
  justify-content: space-between;
}

.flashcards-toolbar__meta {
  display: grid;
  gap: 0.12rem;
}

.flashcard {
  perspective: 1200px;
  min-height: 270px;
}

.flashcard__inner {
  position: relative;
  min-height: inherit;
  transition: transform 320ms ease;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.flashcard__inner.is-flipped {
  transform: rotateY(180deg);
}

.flashcard__face {
  position: absolute;
  inset: 0;
  padding: 1.15rem;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(247, 250, 255, 0.96));
  border: 1px solid rgba(60, 60, 67, 0.08);
  display: grid;
  align-content: start;
  gap: 0.75rem;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.flashcard__face--back {
  transform: rotateY(180deg);
}

.flashcard__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.flashcard__face p:last-child {
  margin: 0;
  color: var(--muted);
}

.tense__block--focus {
  margin-top: 1rem;
  border-color: var(--family-soft, rgba(0, 122, 255, 0.14));
}

.level-focus {
  margin: 0;
  color: var(--muted);
}

.example__top {
  align-items: center;
}

.example__audio,
.test-hint-toggle {
  min-height: 2.3rem;
  padding: 0 0.92rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 122, 255, 0.12);
  background: rgba(0, 122, 255, 0.08);
  color: var(--accent-dark);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.test-results__next {
  margin-top: 0.8rem;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(60, 60, 67, 0.08);
}

.test-results__next p {
  margin: 0 0 0.55rem;
  font-weight: 600;
}

.test-results__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
}

body[data-level="liceum"] .detail-groups {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

body[data-level="liceum"] .detail-groups .detail-group:last-child {
  display: none;
}

@media print {
  body {
    background: #ffffff;
  }

  .hero,
  .sidebar,
  #toolkit,
  #quick-review,
  #comparisons,
  #flashcards,
  #tests-hub,
  .progress-bar,
  .tense__block--practice,
  .example__audio {
    display: none !important;
  }

  .page {
    width: 100%;
    grid-template-columns: 1fr;
    margin: 0;
  }

  .content,
  .section,
  .tense {
    box-shadow: none;
    border: 0;
    background: #ffffff;
  }

  .tense {
    display: block;
    break-inside: avoid;
    page-break-inside: avoid;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.is-hidden {
  display: none !important;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .page {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    order: -1;
  }

  .toc {
    max-height: none;
  }

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

@media (max-width: 900px) {
  .aspect-grid,
  .principles,
  .tense__grid,
  .detail-groups,
  .syntax-showcase,
  .extra-grid,
  .toolkit-grid,
  .review-card__grid,
  .comparison-sheet__grid {
    grid-template-columns: 1fr;
  }

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

  .test-selector {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .hero {
    min-height: auto;
    padding:
      max(0.52rem, env(safe-area-inset-top))
      max(0.72rem, env(safe-area-inset-left))
      max(0.7rem, env(safe-area-inset-bottom))
      max(0.72rem, env(safe-area-inset-right));
  }

  .hero__topbar {
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 0.8rem;
  }

  .topbar-levels {
    order: 3;
    justify-content: flex-start;
  }

  .hero__inner {
    min-height: auto;
    max-width: 100%;
    padding-top: 0.28rem;
    gap: 0;
  }

  .hero::after {
    display: none;
  }

  .brand {
    font-size: 0.68rem;
    letter-spacing: 0.06em;
  }

  .brand--home {
    min-height: 2.05rem;
    padding: 0 0.78rem;
  }

  .hero__jump {
    font-size: 0.84rem;
    padding-bottom: 0.08rem;
  }

  .hero h1 {
    max-width: 6.3ch;
    font-size: clamp(1.95rem, 10.8vw, 2.65rem);
    line-height: 0.95;
  }

  .hero__lead {
    max-width: none;
    display: none;
  }

  .hero__actions {
    display: flex;
    width: 100%;
    gap: 0.5rem;
    margin-top: 0.55rem;
  }

  .hero__actions .button--ghost,
  .hero__plain-meta,
  .hero__jump,
  .eyebrow {
    display: none;
  }

  .hero__actions .button--primary {
    min-height: 2.55rem;
    padding: 0 0.9rem;
    font-size: 0.9rem;
  }

  .page {
    width: min(calc(100% - 1rem), var(--max-width));
    margin-top: 0;
    gap: 0.7rem;
  }

  .section,
  .tense,
  .sidebar__block {
    border-radius: 20px;
  }

  .tense__title {
    font-size: 2.2rem;
  }

  .mode-switch {
    width: 100%;
    max-width: 15rem;
    margin-top: 0.48rem;
  }

  .mode-switch__button {
    flex: 1 1 110px;
    min-height: 2.2rem;
    padding: 0 0.75rem;
    font-size: 0.92rem;
  }

  .sidebar__block,
  .section,
  .tense {
    padding: 0.85rem;
    border-radius: 18px;
  }

  .sidebar__search {
    min-height: 2.55rem;
    padding: 0 0.76rem;
    font-size: 0.95rem;
  }

  .filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.15rem;
    margin: 0 -0.1rem;
    scrollbar-width: none;
  }

  .filters::-webkit-scrollbar {
    display: none;
  }

  .filter {
    flex: 0 0 auto;
    min-height: 1.95rem;
    padding: 0 0.66rem;
    font-size: 0.84rem;
    white-space: nowrap;
  }

  .toc a {
    padding: 0.68rem 0.72rem;
    align-items: center;
  }

  .sidebar__label {
    margin-bottom: 0.42rem;
    font-size: 0.69rem;
    letter-spacing: 0.05em;
  }

  .filters {
    gap: 0.36rem;
  }

  .toc {
    gap: 0;
  }

  .toc__family {
    font-size: 0.62rem;
  }

  .toc__name {
    font-size: 0.9rem;
  }

  .test-question {
    padding: 0.95rem;
  }

  .sidebar {
    gap: 0.65rem;
  }

  .sidebar__block--progress .progress-widget__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sidebar__block--progress .progress-widget__stats article {
    padding: 0.72rem;
  }

  .review-picker,
  .comparison-selector,
  .level-switch {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.2rem;
    scrollbar-width: none;
  }

  .review-picker::-webkit-scrollbar,
  .comparison-selector::-webkit-scrollbar,
  .level-switch::-webkit-scrollbar {
    display: none;
  }

  .review-pill,
  .comparison-pill,
  .level-switch__button {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .flashcards-toolbar,
  .flashcards-toolbar__actions,
  .tool-actions,
  .review-card__top,
  .review-card__example,
  .example__top,
  .flashcard__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .test-card {
    padding: 0.9rem;
    border-radius: 16px;
  }

  .test-intro,
  .test-question,
  .test-results__card,
  .test-results__next {
    border-radius: 16px;
  }

  .test-question__meta {
    gap: 0.45rem;
  }

  .test-question__prompt {
    font-size: 1.03rem;
    line-height: 1.5;
  }

  .test-hint-toggle,
  .example__audio {
    width: 100%;
    justify-content: center;
  }

  .toc {
    max-height: none;
    overflow: visible;
  }

  .test-options {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.15rem;
    scrollbar-width: none;
  }

  .test-options::-webkit-scrollbar {
    display: none;
  }

  .test-options__button {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .flashcard {
    min-height: 320px;
  }

  .test-actions {
    flex-direction: column;
    position: sticky;
    bottom: max(0.55rem, env(safe-area-inset-bottom));
    z-index: 5;
    padding: 0.7rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px) saturate(140%);
    border: 1px solid rgba(60, 60, 67, 0.1);
    box-shadow: 0 12px 24px rgba(15, 23, 40, 0.08);
  }

  .test-actions .button {
    width: 100%;
  }
}

@media (max-width: 540px) {
  .hero {
    padding:
      max(0.48rem, env(safe-area-inset-top))
      max(0.56rem, env(safe-area-inset-left))
      max(0.62rem, env(safe-area-inset-bottom))
      max(0.56rem, env(safe-area-inset-right));
  }

  .hero__inner {
    padding-top: 0.32rem;
  }

  .hero h1 {
    font-size: clamp(1.78rem, 10vw, 2.3rem);
  }

  .hero__actions .button--primary {
    min-height: 2.45rem;
    padding: 0 0.82rem;
    font-size: 0.88rem;
  }

  .page {
    width: calc(100% - 0.7rem);
    margin-top: 0;
  }

  .level-switch--topbar {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    scrollbar-width: none;
  }

  .level-switch--topbar::-webkit-scrollbar {
    display: none;
  }

  .sidebar__block,
  .section,
  .tense {
    padding: 0.76rem;
    border-radius: 16px;
  }

  .section h2 {
    font-size: 1.44rem;
  }

  .tense__title {
    font-size: 1.68rem;
  }

  .test-question__meta {
    gap: 0.4rem;
  }

  .test-question__badge {
    font-size: 0.76rem;
  }

  .test-question__number {
    width: 1.85rem;
    height: 1.85rem;
  }

  .sidebar__search,
  .filter,
  .toc a {
    font-size: 0.88rem;
  }

  .progress-widget__stats {
    grid-template-columns: 1fr;
  }

  .sidebar__block--progress .progress-widget__stats {
    grid-template-columns: 1fr 1fr;
  }

  .flashcard__face {
    padding: 0.95rem;
  }

  .section__header {
    margin-bottom: 0.82rem;
  }
}

@media (max-width: 900px) {
  .tense-insights,
  .detail-groups,
  .test-dashboard__grid,
  .level-scope__grid,
  .appendix-grid {
    grid-template-columns: 1fr;
  }

  .test-toolbar {
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .sidebar__summary {
    padding: 0.82rem 0.88rem;
  }

  .tense-insights {
    gap: 0.7rem;
  }

  .test-toolbar__actions,
  .test-question__quick-actions {
    width: 100%;
  }

  .test-toolbar__actions .button,
  .test-question__quick-actions .button {
    flex: 1 1 180px;
  }
}

@media (max-width: 540px) {
  .sidebar__summary {
    font-size: 0.76rem;
  }

  .tense-insight,
  .level-scope__hero,
  .level-scope__card,
  .appendix-card,
  .test-dashboard__card {
    padding: 0.88rem 0.92rem;
    border-radius: 16px;
  }

  .test-toolbar__actions .button,
  .test-question__quick-actions .button {
    width: 100%;
    flex-basis: 100%;
  }
}