:root {
  color-scheme: dark;
  --color-bg: #041f16;
  --color-bg-alt: #083d2b;
  --color-surface: #0c4f36;
  --color-border: rgba(255, 255, 255, 0.06);
  --color-text: #f1fff5;
  --color-muted: rgba(241, 255, 245, 0.7);
  --color-accent: #b6ff00;
  --color-accent-alt: #00d9ff;
  --color-danger: #ff6b6b;
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.24);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition-base: 200ms ease;
  --font-base: "Segoe UI", "Inter", "Open Sans", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-base);
  background: radial-gradient(circle at top left, rgba(0, 217, 255, 0.2), transparent 40%),
    radial-gradient(circle at bottom right, rgba(182, 255, 0, 0.18), transparent 45%),
    var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: no-preference) {
  * {
    scroll-behavior: smooth;
  }
}

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

header {
  width: 100%;
  background: rgba(8, 61, 43, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 1000;
}

main,
footer {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 0 24px;
}

.app-header {
  width: 100%;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand__logo-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.brand__logo {
  height: 126px;
  width: auto;
  object-fit: contain;
}

.brand__emoji {
  font-size: 1.75rem;
}

.brand__text h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
}

.tagline {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.75rem;
  text-align: center;
  white-space: nowrap;
}

.disclaimer-badge {
  margin: 4px 0 0;
  padding: 4px 12px;
  background: rgba(255, 165, 0, 0.15);
  border: 1px solid #ffa500;
  border-radius: var(--radius-md);
  color: #ffa500;
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
}

.install-btn {
  border: 1px solid var(--color-accent);
  background: transparent;
  color: var(--color-accent);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 0.9rem;
}

.install-btn:hover,
.install-btn:focus-visible {
  background: var(--color-accent);
  color: #06140c;
  transform: translateY(-1px);
}

.tab-nav {
  display: flex;
  gap: 8px;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(182, 255, 0, 0.3) transparent;
}

.tab-nav::-webkit-scrollbar {
  height: 4px;
}

.tab-nav::-webkit-scrollbar-track {
  background: transparent;
}

.tab-nav::-webkit-scrollbar-thumb {
  background: rgba(182, 255, 0, 0.3);
  border-radius: 2px;
}

.tab-nav__item {
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 16px;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  font-weight: 500;
  font-size: 0.95rem;
  border: 2px solid transparent;
}

.tab-nav__item:hover,
.tab-nav__item:focus-visible {
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
}

.tab-nav__item.is-active {
  background: rgba(182, 255, 0, 0.15);
  color: var(--color-accent);
  border-color: var(--color-accent);
  font-weight: 600;
}

main {
  flex: 1;
  width: 100%;
  padding: 32px 24px 48px;
  position: relative;
  z-index: 1;
}

.tab-panel {
  animation: fadeIn 300ms ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel-header {
  margin-bottom: 40px;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  background: rgba(12, 79, 54, 0.3);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-header h2 {
  margin: 0 0 12px;
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-header p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
  font-size: 1.1rem;
}

.panel-body {
  display: grid;
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.placeholder {
  margin: 0;
  color: var(--color-muted);
  font-style: italic;
}

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

.learn-intro {
  background: rgba(0, 217, 255, 0.06);
  border-left: 3px solid var(--color-accent-alt);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 32px;
  display: grid;
  gap: 12px;
}

.learn-intro p {
  margin: 0;
  line-height: 1.6;
}

.simulator-guide {
  background: rgba(182, 255, 0, 0.08);
  border: 1px solid rgba(182, 255, 0, 0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.simulator-guide h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  color: var(--color-accent);
}

.guide-steps {
  margin: 0;
  padding-left: 24px;
  display: grid;
  gap: 12px;
}

.guide-steps li {
  line-height: 1.6;
  padding-left: 8px;
}

.guide-steps strong {
  color: var(--color-accent);
}

.helper-text--success {
  color: var(--color-accent-alt);
}

.helper-text--error {
  color: var(--color-danger);
}

.lessons-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.lesson-card {
  background: transparent;
  border: 1px solid rgba(182, 255, 0, 0.25);
  border-radius: 16px;
  padding: 24px;
  display: grid;
  gap: 16px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.lesson-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  border-color: rgba(182, 255, 0, 0.4);
}

.lesson-card__header {
  background: transparent;
}

.lesson-card__header h3 {
  margin: 0 0 6px;
  font-size: 1.25rem;
}

.lesson-card__header p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
}

.lesson-card__list,
.lesson-card__example ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
  /*color: rgba(255, 255, 255, 0.85);*/
}

.lesson-card__example {
  background: transparent;
  border-radius: var(--radius-md);
  padding: 16px 0;
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 8px;
  display: grid;
  gap: 10px;
}

.lesson-card__example h4 {
  margin: 0;
  color: var(--color-accent-alt);
  font-size: 1.05rem;
}

.lesson-card__takeaway {
  margin: 0;
  font-style: italic;
  color: var(--color-muted);
}

.secondary-btn {
  justify-self: start;
  border: 1px solid rgba(182, 255, 0, 0.6);
  background: transparent;
  color: var(--color-accent);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-base);
}

.secondary-btn:hover,
.secondary-btn:focus-visible {
  background: rgba(182, 255, 0, 0.12);
  transform: translateY(-1px);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 1000;
}

.modal {
  width: min(640px, 100%);
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  display: grid;
  gap: 20px;
  padding: 24px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.modal__header h2 {
  margin: 0;
}

.icon-btn {
  border: none;
  background: transparent;
  color: var(--color-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  color: var(--color-accent-alt);
}

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

.modal-form {
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.modal-results {
  background: rgba(4, 31, 22, 0.75);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 16px;
  display: grid;
  gap: 16px;
}

.modal-results h3 {
  margin: 0;
}

.results-grid {
  margin: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.results-grid div {
  display: grid;
  gap: 4px;
}

.results-grid dt {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.results-grid dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

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

.is-modal-open {
  overflow: hidden;
}

.simulator-form {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.results-summary {
  display: grid;
  gap: 16px;
}

.results-summary h3 {
  margin: 0;
  font-size: 1.3rem;
}

.result-note {
  margin: 0;
  padding: 12px;
  background: rgba(0, 217, 255, 0.08);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent-alt);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.5;
}

.helper-text--warning {
  color: #ffa500;
}

.quiz-container {
  display: grid;
  gap: 20px;
}

.quiz-start,
.quiz-question,
.quiz-results {
  background: rgba(12, 79, 54, 0.58);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  gap: 20px;
}

.quiz-start h3,
.quiz-question h3,
.quiz-results h3 {
  margin: 0;
  font-size: 1.5rem;
}

.quiz-info {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.quiz-info li {
  padding-left: 8px;
}

.quiz-progress {
  display: grid;
  gap: 8px;
}

.quiz-progress span {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.progress-bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  transition: width 300ms ease;
}

.quiz-options {
  display: grid;
  gap: 12px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(4, 31, 22, 0.75);
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: left;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--color-accent-alt);
  background: rgba(0, 217, 255, 0.08);
  transform: translateX(4px);
}

.quiz-option:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
}

.option-text {
  flex: 1;
}

.quiz-option--correct {
  border-color: #4ade80;
  background: rgba(74, 222, 128, 0.12);
}

.quiz-option--correct .option-letter {
  background: #4ade80;
  color: #06140c;
}

.quiz-option--incorrect {
  border-color: var(--color-danger);
  background: rgba(255, 107, 107, 0.12);
}

.quiz-option--incorrect .option-letter {
  background: var(--color-danger);
  color: #fff;
}

.quiz-feedback {
  margin-top: 16px;
  padding: 20px;
  border-radius: var(--radius-md);
  display: grid;
  gap: 12px;
}

.quiz-feedback--correct {
  background: rgba(74, 222, 128, 0.12);
  border: 1px solid #4ade80;
}

.quiz-feedback--incorrect {
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid var(--color-danger);
}

.feedback-result {
  margin: 0;
  font-weight: 700;
  font-size: 1.1rem;
}

.feedback-explanation {
  margin: 0;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

.results-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.stat-card {
  background: rgba(4, 31, 22, 0.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
}

.results-message {
  margin: 0;
  padding: 16px;
  background: rgba(0, 217, 255, 0.08);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent-alt);
  line-height: 1.6;
}

.quiz-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.challenges-intro {
  background: rgba(182, 255, 0, 0.08);
  border: 1px solid rgba(182, 255, 0, 0.2);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
}

.challenges-intro p {
  margin: 0;
  line-height: 1.6;
}

.challenges-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.challenge-card {
  background: rgba(12, 79, 54, 0.58);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: grid;
  gap: 14px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.challenge-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.challenge-card--completed {
  opacity: 0.7;
  border-color: #4ade80;
}

.challenge-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
}

.challenge-header h4 {
  margin: 0;
  font-size: 1.15rem;
}

.challenge-badge {
  background: #4ade80;
  color: #06140c;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}

.challenge-odds {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
  background: rgba(4, 31, 22, 0.75);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.odds-item {
  font-size: 0.9rem;
}

.odds-item strong {
  color: var(--color-accent-alt);
}

.challenge-question {
  margin: 0;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.9);
}

.challenge-active {
  background: rgba(12, 79, 54, 0.58);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  gap: 20px;
}

.challenge-active h3 {
  margin: 0;
  font-size: 1.5rem;
}

.challenge-options {
  display: grid;
  gap: 12px;
}

.dashboard-summary,
.dashboard-activity {
  margin-bottom: 28px;
}

.dashboard-summary h3,
.dashboard-activity h3 {
  margin: 0 0 16px;
  font-size: 1.3rem;
}

.metric-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.metric-card h4 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
  font-weight: 600;
}

.activity-list {
  background: rgba(12, 79, 54, 0.58);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: grid;
  gap: 12px;
}

.activity-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(4, 31, 22, 0.75);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent-alt);
}

.activity-desc {
  flex: 1;
}

.activity-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}

.activity-xp {
  color: var(--color-accent);
  font-weight: 600;
}

.activity-time {
  color: var(--color-muted);
}

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

.about-section {
  background: rgba(12, 79, 54, 0.58);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.about-section h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.about-section p {
  margin: 0 0 12px;
  line-height: 1.6;
}

.about-section p:last-child {
  margin-bottom: 0;
}

.about-section ul,
.about-section ol {
  margin: 12px 0;
  padding-left: 24px;
  display: grid;
  gap: 8px;
}

.about-section li {
  line-height: 1.6;
}

.about-section.disclaimer {
  border-color: #ffa500;
  background: rgba(255, 165, 0, 0.08);
}

.about-section.disclaimer h3 {
  color: #ffa500;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}

.field-hint {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-style: italic;
}

.field input {
  border-radius: var(--radius-md);
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(4, 31, 22, 0.65);
  color: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.field input:focus-visible {
  outline: none;
  border-color: var(--color-accent-alt);
  box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.25);
}

.primary-btn {
  align-self: end;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  border: none;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  color: #06140c;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.primary-btn:hover,
.primary-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 200, 255, 0.2);
}

.simulator-results {
  border-radius: var(--radius-md);
  background: rgba(4, 31, 22, 0.75);
  padding: 20px;
  border: 1px solid var(--color-border);
  min-height: 120px;
  display: grid;
  gap: 8px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.metric-card {
  background: rgba(4, 31, 22, 0.75);
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid var(--color-border);
  display: grid;
  gap: 8px;
  justify-items: start;
}

.metric-card h3 {
  margin: 0;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
}

.metric-value {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 700;
}

.app-footer {
  padding: 48px 24px 32px;
  color: var(--color-muted);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 48px;
  background: rgba(4, 31, 22, 0.4);
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

.footer-disclaimer {
  background: rgba(255, 165, 0, 0.1);
  border: 2px solid #ffa500;
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  text-align: center;
}

.footer-disclaimer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.9rem;
  line-height: 1.5;
}

.footer-disclaimer strong {
  color: #ffa500;
}

.footer-copyright {
  text-align: center;
}

.footer-link {
  color: var(--color-accent);
  text-decoration: none;
  margin-top: 8px;
  display: inline-block;
  transition: color var(--transition-base);
}

.footer-link:hover {
  color: var(--color-accent-alt);
  text-decoration: underline;
}

.hamburger-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 8px;
  cursor: pointer;
  z-index: 1002;
  position: relative;
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-btn.is-open .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.hamburger-btn.is-open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-open .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.menu-overlay.is-open {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {
  .hamburger-btn {
    display: flex;
  }

  .tab-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(4, 31, 22, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    gap: 0;
    padding: 80px 20px 20px;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
  }

  .tab-nav.is-open {
    right: 0;
  }

  .tab-nav__item {
    width: 100%;
    padding: 16px 20px;
    text-align: left;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
  }

  .brand__text h1 {
    font-size: 1.25rem;
  }

  .tagline {
    font-size: 0.75rem;
  }

  .panel-header h2 {
    font-size: 1.5rem;
  }

  main {
    padding: 24px 16px 32px;
  }
}

@media (max-width: 480px) {
  .app-header {
    padding: 12px 16px;
  }

  .brand__logo {
    height: 90px;
  }

  .install-btn {
    padding: 8px 14px;
    font-size: 0.9rem;
  }
}