:root {
  --color-primary: #2d6cdf;
  --color-success: #2e7d32;
  --color-error: #c62828;
  --color-bg: #f7f9fc;
  --color-text: #0b1a33;
  --radius: 16px;
  --spacing: 12px;
  --shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.app-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 16px;
}
.header-left {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
  color: var(--color-text);
}
.brand:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 3px;
  border-radius: 12px;
}
.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-tagline {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
}
@media (max-width: 520px) {
  .brand-name {
    font-size: 18px;
  }
  .brand-tagline {
    font-size: 11px;
    letter-spacing: 0.08em;
  }
}
.greeting { font-size: 18px; font-weight: 600; }
.top-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 6px;
  background: #fff;
  border-radius: 999px;
  box-shadow: var(--shadow);
}
.top-nav__group {
  position: relative;
}
.top-nav__group summary {
  list-style: none;
}
.top-nav__summary::-webkit-details-marker {
  display: none;
}
.top-nav__link {
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 600;
  color: #1e2d4b;
  text-decoration: none;
  transition: background 0.15s ease;
}
.top-nav__link:hover {
  background: rgba(45, 108, 223, 0.12);
}
.top-nav__link:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}
.top-nav__link[aria-current="page"] {
  background: var(--color-primary);
  color: #fff;
}
.top-nav__sub {
  padding-left: 10px;
  display: grid;
  gap: 6px;
}
.top-nav__section-subtitle {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #6b7791;
}
.top-nav__summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}
.top-nav__summary::after {
  content: "▾";
  font-size: 12px;
}
.top-nav__group[open] .top-nav__summary::after {
  transform: rotate(180deg);
}
.top-nav__dropdown {
  position: absolute;
  top: 48px;
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid #d7deeb;
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 12px;
  display: none;
  z-index: 10;
}
.top-nav__group[open] .top-nav__dropdown {
  display: grid;
  gap: 10px;
}
.top-nav__section {
  display: grid;
  gap: 6px;
}
.top-nav__section-title {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #42536f;
}
.top-nav__dropdown a {
  display: block;
  padding: 8px 10px;
  border-radius: 10px;
  color: #1e2d4b;
  text-decoration: none;
  font-weight: 600;
}
.top-nav__dropdown a:hover {
  background: rgba(45, 108, 223, 0.12);
}
.top-nav__dropdown a[aria-current="page"] {
  background: var(--color-primary);
  color: #fff;
}
.header-right { display: grid; grid-auto-flow: column; align-items: center; gap: 16px; }
.level-control { display: inline-flex; gap: 8px; background: #fff; padding: 6px; border-radius: 12px; box-shadow: var(--shadow); }
.level-btn {
  border: none; background: #eef3ff; color: var(--color-primary);
  padding: 8px 12px; border-radius: 10px; cursor: pointer; font-size: 14px;
}
.level-btn[aria-pressed="true"] { background: var(--color-primary); color: #fff; }

.scorebar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
}

.reset-button {
  border: none;
  background: white;
  color: var(--color-primary);
  width: 40px;
  height: 40px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.reset-button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.score {
  min-width: 72px;
  text-align: right;
}

.app-main {
  min-height: calc(100dvh - 220px);
  display: grid;
  place-items: center;
  padding: 16px;
}

body.page-home .header-right {
  display: none;
}

body.page-home .app-main {
  place-items: stretch;
  padding: 32px 16px 40px;
}

body.page-home .game-footer {
  display: none;
}

body.page-practice .header-right {
  display: none;
}

body.page-practice .app-main {
  place-items: stretch;
  padding: 24px 16px 40px;
  background: linear-gradient(180deg, rgba(45, 108, 223, 0.08), transparent 40%);
}

body.page-practice .game-footer {
  display: none;
}

body.page-math-prep .header-right {
  display: none;
}

body.page-math-prep .app-main {
  place-items: stretch;
  padding: 32px 16px 40px;
  background: linear-gradient(180deg, rgba(45, 108, 223, 0.05), transparent 55%);
}

body.page-complement .app-main {
  place-items: stretch;
  padding: 20px 16px 40px;
}

.view-home {
  display: grid;
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
  text-align: left;
}

.hero-grid {
  display: grid;
  gap: 24px;
  justify-items: start;
}
@media (min-width: 880px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: center;
  }
}
.home-hero {
  display: grid;
  gap: 16px;
}

.home-eyebrow {
  margin: 0;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.view-home h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 700;
}

.home-subtitle {
  max-width: 52ch;
  margin: 0;
  font-size: 18px;
  color: #30415f;
}

.hero-intro {
  margin: 0;
  font-size: 18px;
  color: #243759;
}

.mission-callout {
  margin: 0;
  font-size: 16px;
  color: #1e2d4b;
}

.hero-title-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.info-button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid #d7deeb;
  background: #fff;
  color: #1e2d4b;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.info-button:hover {
  background: rgba(45, 108, 223, 0.08);
}
.info-button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.info-box {
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #f4f7ff;
  border: 1px solid #d7deeb;
  display: grid;
  gap: 8px;
}

.mascot-figure {
  margin: 0;
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 0;
  background: none;
  border-radius: 0;
  box-shadow: none;
}
.mascot-figure picture,
.mascot-figure img {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
}
.mascot-figure figcaption {
  margin: 0;
  font-size: 15px;
  color: #30415f;
  text-align: center;
}
@media (min-width: 880px) {
  .hero-grid .mascot-figure {
    justify-self: end;
  }
}

.home-grid {
  display: grid;
  gap: 20px;
}

@media (min-width: 880px) {
  .home-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.home-card {
  background: white;
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 20px;
}

.home-card h2 {
  margin: 0 0 8px;
  font-size: 26px;
}

.home-card p {
  margin: 0;
  font-size: 17px;
  color: #42536f;
}

.home-card-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
}

.home-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  padding: 14px 22px;
  font-size: 17px;
  cursor: pointer;
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease;
}
.home-button:hover {
  filter: brightness(0.98);
}
.home-button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}
.home-button:disabled,
.home-button[aria-disabled="true"] {
  background: #d7deeb;
  color: #7a879d;
  cursor: not-allowed;
  box-shadow: none;
}

.home-card--upcoming {
  position: relative;
}

.home-card--upcoming::after {
  content: "Demnächst";
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(45, 108, 223, 0.1);
  color: var(--color-primary);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.view-game {
  display: grid;
  gap: 24px;
  width: 100%;
  justify-items: center;
}

.game-shell {
  width: 100%;
  display: grid;
  place-items: center;
}

.game-view {
  width: 100%;
  display: grid;
  place-items: center;
}

.game-footer {
  position: sticky;
  bottom: 0;
  width: 100%;
  padding: 12px 16px 24px;
  background: linear-gradient(180deg, rgba(247, 249, 252, 0), var(--color-bg) 40%);
  display: flex;
  justify-content: center;
}
.game-footer .numbers-grid,
.game-footer .answer-row {
  width: 100%;
  max-width: 520px;
}

.complement-stage {
  width: 100%;
  display: grid;
  place-items: center;
}

.stage-card {
  width: min(960px, 100%);
  background: white;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(16px, 3vw, 28px);
  display: grid;
  gap: 16px;
}

.stage-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.stage-kicker {
  margin: 0;
  color: #30415f;
  font-weight: 700;
}

.stage-actions {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.stage-question {
  margin: 0;
  font-weight: 700;
  color: #1e2d4b;
}

.page-complement .shake-button {
  min-width: 0;
  padding-inline: 18px;
}

.stage-footer {
  display: flex;
  justify-content: center;
}

.stage-footer .numbers-grid,
.stage-footer .answer-row {
  max-width: 620px;
  margin: 0 auto;
}

.number-stage--idle .number-display {
  opacity: 0.3;
  transform: scale(0.96);
}

.number-display.ghost {
  background: #eef2fb;
  color: #7686a6;
}

.cases-shell {
  max-width: 1080px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 36px);
  display: grid;
  gap: 20px;
}

.cases-header h1 {
  margin: 0 0 6px;
}

.cases-header p {
  margin: 0;
  color: #30415f;
  font-size: 16px;
}

.cases-links {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cases-card {
  border: 1px solid #e1e7f5;
  border-radius: 18px;
  padding: 14px;
  display: grid;
  gap: 10px;
}

.cases-field {
  display: grid;
  gap: 6px;
}

.cases-field label {
  font-weight: 700;
  color: #1e2d4b;
}

.cases-field input,
.cases-field textarea {
  width: 100%;
  font-size: 15px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid #d7deeb;
  background: #fff;
  font-family: inherit;
}

.cases-grid {
  display: grid;
  gap: 10px;
}

.cases-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.cases-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.cases-button {
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.cases-button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.cases-status {
  margin: 0;
  font-size: 14px;
  color: #1e2d4b;
}

.cases-table {
  width: 100%;
  border-collapse: collapse;
}
.cases-table th,
.cases-table td {
  border: 1px solid #e1e7f5;
  padding: 8px;
  text-align: left;
}
.cases-table input {
  width: 100%;
  box-sizing: border-box;
}
.page-complement .game-footer {
  position: static;
  padding: 0;
  background: transparent;
}

.view-math-prep {
  width: 100%;
}

.math-prep-container {
  max-width: 1080px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 40px);
  display: grid;
  gap: 28px;
}

.math-prep-header {
  gap: 18px;
}

.math-prep-eyebrow {
  margin: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.math-prep-header h1 {
  margin: 0;
  font-size: clamp(30px, 4.6vw, 42px);
}

.math-prep-subtitle {
  margin: 0;
  color: #30415f;
  font-size: 18px;
  max-width: 70ch;
}

.math-prep-controls {
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .math-prep-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

.math-prep-select {
  display: grid;
  gap: 8px;
}

.math-prep-select label {
  font-weight: 600;
  color: #1e2d4b;
}

.math-prep-select select {
  border-radius: 14px;
  border: 1px solid #d7deeb;
  padding: 12px 14px;
  font-size: 16px;
  background: #fff;
  color: var(--color-text);
  font-family: inherit;
}

.math-prep-viewer {
  display: grid;
  gap: 12px;
}

.math-prep-viewer iframe {
  width: 100%;
  height: min(72vh, 720px);
  border: 1px solid #d7deeb;
  border-radius: 18px;
  background: #f8faff;
}

.math-prep-hint {
  margin: 0;
  font-size: 14px;
  color: #42536f;
}

.view-practice {
  width: 100%;
}

.practice-container {
  max-width: 1040px;
  margin: 0 auto;
  background: white;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 36px);
  display: grid;
  gap: 28px;
}

.practice-header {
  gap: 18px;
}

.practice-eyebrow {
  margin: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.practice-header h1 {
  margin: 0;
  font-size: clamp(28px, 4.4vw, 38px);
}

.practice-subtitle {
  margin: 0;
  color: #30415f;
  font-size: 18px;
  max-width: 60ch;
}

.practice-content {
  display: grid;
  gap: 24px;
}

@media (min-width: 960px) {
  .practice-content {
    grid-template-columns: minmax(260px, 320px) 1fr;
    gap: 32px;
  }
}

.practice-panel {
  background: #f7f9fc;
  border-radius: 20px;
  padding: 20px;
  display: grid;
  gap: 18px;
}

.practice-field label {
  display: inline-block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #1e2d4b;
}

.practice-field select,
.practice-field textarea {
  width: 100%;
  font-size: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #d7deeb;
  background: white;
  color: var(--color-text);
  font-family: inherit;
}

.practice-field textarea {
  min-height: 320px;
  resize: vertical;
  line-height: 1.5;
}

.practice-slider {
  display: grid;
  gap: 6px;
}

.practice-slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 15px;
  color: #1e2d4b;
  font-weight: 600;
}

.practice-slider input[type="range"] {
  width: 100%;
}

.practice-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.practice-controls button {
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 16px;
  cursor: pointer;
  color: white;
  background: var(--color-primary);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease;
}

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

.practice-controls button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.practice-status {
  margin: 0;
  font-size: 15px;
  color: #1e2d4b;
}

.practice-progress {
  height: 10px;
  border-radius: 999px;
  background: #dde3f0;
  overflow: hidden;
}

.practice-progress > div {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  transition: width 160ms ease;
}

.practice-main {
  display: grid;
  gap: 18px;
}

.practice-download {
  display: grid;
  gap: 6px;
  font-size: 15px;
  color: #1e2d4b;
}

.practice-download a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.practice-download a:hover {
  text-decoration: underline;
}

.practice-download a[aria-disabled="true"] {
  color: #7a879d;
  cursor: not-allowed;
  text-decoration: none;
  pointer-events: none;
}

.practice-note {
  margin: 0;
  color: #42536f;
  font-size: 14px;
}

body.page-dehnungs .app-main {
  place-items: stretch;
  padding: 32px 16px 40px;
  background: linear-gradient(180deg, rgba(45, 108, 223, 0.05), transparent 55%);
}

.view-dehnungs {
  width: 100%;
}

.dehnungs-container {
  max-width: 1120px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 40px);
  display: grid;
  gap: 26px;
}

.dehnungs-header {
  gap: 18px;
}

.dehnungs-eyebrow {
  margin: 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.dehnungs-header h1 {
  margin: 0;
  font-size: clamp(28px, 4.6vw, 40px);
}

.dehnungs-subtitle {
  margin: 0;
  color: #30415f;
  font-size: 17px;
  max-width: 62ch;
}

.dehnungs-form {
  display: grid;
  gap: 18px;
}

.dehnungs-section {
  border: 1px solid #e1e7f5;
  border-radius: 20px;
  padding: 16px;
  display: grid;
  gap: 14px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.section-eyebrow {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section-lead {
  margin: 4px 0 0;
  color: #42536f;
  font-size: 15px;
}

.section-check {
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  background: #e8efff;
  color: #1e2d4b;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.section-check:hover {
  filter: brightness(0.98);
}
.section-check:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}
.section-check--primary {
  background: var(--color-primary);
  color: #fff;
}

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

.dehnungs-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.dehnungs-field {
  display: grid;
  gap: 6px;
}

.dehnungs-field span {
  font-weight: 600;
  color: #1e2d4b;
}

.dehnungs-field input,
.dehnungs-field select,
.dehnungs-field textarea {
  width: 100%;
  font-size: 16px;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid #d7deeb;
  background: #fff;
  color: var(--color-text);
  font-family: inherit;
}

.dehnungs-field textarea {
  min-height: 180px;
  resize: vertical;
}

.dehnungs-checkbox {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  background: #f7f9fc;
}

.dehnungs-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
}

.dehnungs-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: #1e2d4b;
}

.inline-input {
  width: 140px;
  max-width: 44vw;
  display: inline-block;
  margin: 4px 6px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid #d7deeb;
  font-size: 16px;
}

.dehnungs-table {
  border: 1px solid #e1e7f5;
  border-radius: 14px;
  overflow: hidden;
}

.dehnungs-table .table-head,
.dehnungs-table .table-row {
  display: grid;
  grid-template-columns: 1fr 110px 110px;
  align-items: center;
}

.dehnungs-table .table-head {
  background: #f4f6fb;
  font-weight: 700;
  color: #1e2d4b;
  padding: 10px 12px;
}

.dehnungs-table .table-body {
  display: grid;
}

.dehnungs-table .table-row {
  padding: 8px 12px;
  gap: 8px;
  border-top: 1px solid #e1e7f5;
}

.dehnungs-table .table-row input[type="radio"] {
  width: 20px;
  height: 20px;
  justify-self: center;
}

.section-note {
  margin: 0;
  font-size: 15px;
  color: #42536f;
}

.section-status {
  margin: 0;
  font-size: 14px;
  color: #1e2d4b;
}

.status-good {
  color: var(--color-success);
  font-weight: 700;
}

.status-bad {
  color: var(--color-error);
  font-weight: 700;
}

.is-correct input,
.is-correct select,
.is-correct textarea,
.is-correct {
  border-color: var(--color-success);
  background: #f1f8f1;
}

.is-wrong input,
.is-wrong select,
.is-wrong textarea,
.is-wrong {
  border-color: var(--color-error);
  background: #fff5f5;
}

.dehnungs-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.view {
  width: 100%;
  display: grid;
  gap: 32px;
  justify-items: stretch;
  align-items: start;
}

.shake-button {
  min-width: 200px;
  min-height: 56px;
  padding: 16px 24px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 999px;
  font-size: 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}
.shake-button:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.game-view-question .prompt {
  font-size: 22px;
  margin: 0 0 8px;
}

.number-stage {
  display: grid;
  place-items: center;
  width: 100%;
}

.number-display {
  font-size: clamp(80px, 16vw, 128px);
  font-weight: 700;
  line-height: 1;
  padding: 16px 32px;
  border-radius: var(--radius);
  background: white;
  box-shadow: var(--shadow);
  transform: scale(0.98);
  opacity: 0;
  transition: transform 160ms ease, opacity 160ms ease;
}
.number-display.show {
  transform: scale(1);
  opacity: 1;
}

.number-display.shake {
  animation: shakeNum 240ms ease;
}

@keyframes shakeNum {
  0% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-4px); }
  100% { transform: translateX(0); }
}

.game-footer {
  position: sticky;
  bottom: 0;
  width: 100%;
  padding: 12px 16px 24px;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

@media (orientation: landscape) {
  .numbers-grid {
    grid-template-columns: repeat(9, 1fr);
  }
}

/* Eingabefeld + OK Button für hohe Stufen */
.answer-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; max-width: 440px; margin: 0 auto; width: 100%; }
.answer-input { font-size: 22px; padding: 12px 14px; border-radius: 12px; border: 2px solid #dde3f0; background: #fff; }
.answer-ok {
  min-width: 96px; border: none; border-radius: 12px; background: var(--color-primary); color: #fff;
  font-size: 18px; padding: 12px 16px; cursor: pointer; box-shadow: var(--shadow);
}
.answer-ok:focus-visible { outline: 3px solid #99b8ff; outline-offset: 2px; }

.num {
  min-height: 56px;
  font-size: 22px;
  border: none;
  border-radius: 16px;
  background: white;
  color: #ffffff;
  box-shadow: var(--shadow);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}
.num:active {
  transform: translateY(1px);
}
.num:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.num:focus-visible {
  outline: 3px solid #99b8ff;
  outline-offset: 2px;
}

.toast {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-size: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.success {
  border-left: 6px solid var(--color-success);
}
.toast.error {
  border-left: 6px solid var(--color-error);
}

/* Bunte Buttons nach Wert */
.num[data-value="1"] { background: #f44336; }
.num[data-value="2"] { background: #e91e63; }
.num[data-value="3"] { background: #9c27b0; }
.num[data-value="4"] { background: #3f51b5; }
.num[data-value="5"] { background: #2196f3; }
.num[data-value="6"] { background: #009688; }
.num[data-value="7"] { background: #4caf50; }
.num[data-value="8"] { background: #ff9800; }
.num[data-value="9"] { background: #795548; }
.num[data-value="0"] { background: #90a4ae; }
.num { color: #fff; }

/* Farben für 10–19 */
.num[data-value="10"] { background: #ef5350; }
.num[data-value="11"] { background: #ff4081; }
.num[data-value="12"] { background: #ba68c8; }
.num[data-value="13"] { background: #7986cb; }
.num[data-value="14"] { background: #64b5f6; }
.num[data-value="15"] { background: #26a69a; }
.num[data-value="16"] { background: #81c784; }
.num[data-value="17"] { background: #ffb74d; }
.num[data-value="18"] { background: #a1887f; }
.num[data-value="19"] { background: #90a4ae; }
/* 20 for upper bound in small range */
.num[data-value="20"] { background: #42a5f5; }

/* Reset-Button sichtbarer */
.reset-button {
  width: 48px;
  height: 48px;
  background: #ffffff;
}
.reset-button svg { width: 24px; height: 24px; fill: var(--color-primary); }
.reset-button:hover { filter: brightness(0.98); }

/* Konfetti */
.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 9999;
}
.confetti {
  position: absolute;
  top: -10vh;
  width: 8px;
  height: 12px;
  opacity: 0.9;
  will-change: transform;
  animation-name: confettiFall;
  animation-timing-function: linear;
}
@keyframes confettiFall {
  to {
    transform: translateY(120vh) rotate(360deg);
    opacity: 1;
  }
}

.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}