.package-body {
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --bg: #0f172a;
  --panel: #1e293b;
  --line: rgba(148, 163, 184, 0.22);
  --text: #f8fafc;
  --text-soft: #cbd5e1;
  --text-muted: #94a3b8;
  --accent: #14b8a6;
  --accent-2: #38bdf8;
  --yellow: #fbbf24;
  --danger: #fb7185;
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.92) 0%, rgba(15, 23, 42, 1) 34%, rgba(11, 18, 32, 1) 100%);
  color: var(--text);
  font-family: var(--font-sans);
}

.package-body * {
  box-sizing: border-box;
}

.package-body [hidden] {
  display: none !important;
}

.package-body h1,.package-body h2,.package-body h3,.package-body .logo-text,.package-body .package-kicker {
  font-family: var(--font-display);
}

.package-body .app-header {
  background: rgba(15, 23, 42, 0.84);
  border-bottom: 1px solid var(--line);
}

.package-body .header-container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.package-body .logo-area {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
}

.package-body .logo-icon {
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: #ffffff;
  color: #0f172a;
  font-size: 0.72rem;
  font-weight: 900;
  box-shadow: inset 0 0 0 3px #fbbf24;
}

.package-body .logo-text {
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
}

.package-body .logo-text span {
  color: var(--accent);
}

.package-body .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: inherit;
  font: 800 0.8rem var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.18s ease;
}

.package-body .btn-primary {
  background: #118568;
  color: #ecfeff;
  border-color: rgba(45, 212, 191, 0.25);
}

.package-body .btn-primary:hover {
  background: #0f766e;
}

.package-body .btn-secondary {
  background: rgba(15, 23, 42, 0.52);
  color: var(--text-soft);
  border-color: var(--line);
}

.package-body .btn-secondary:hover {
  background: rgba(30, 41, 59, 0.72);
  color: var(--text);
}

.package-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 16px 50px;
}

.package-kicker {
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.package-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 0 24px;
}

.package-hero-content h1 {
  margin: 8px 0 10px;
  font-size: clamp(1.8rem, 3.6vw, 2.4rem);
  line-height: 1.08;
}

.package-hero-content p {
  margin: 0;
  color: var(--text-soft);
  max-width: 580px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.package-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.package-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 5px 10px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 800;
}

.package-hero-visual {
  flex: 0 0 auto;
  display: none;
}

.package-icon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.pkg-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.35), rgba(56, 189, 248, 0.25));
  border: 1px solid rgba(148, 163, 184, 0.18);
}

@media (min-width: 640px) {
  .package-hero-visual { display: block; }
}

.package-topics-section {
  margin-top: 8px;
}

.package-topics-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.package-topics-head h2 {
  margin: 5px 0 0;
  font-size: 1.2rem;
}

.package-error {
  padding: 16px;
  border: 1px solid rgba(251, 113, 133, 0.35);
  border-radius: 10px;
  background: rgba(251, 113, 133, 0.1);
  color: var(--danger);
}

.package-error strong {
  display: block;
  margin-bottom: 4px;
}

.package-loader {
  padding: 28px 18px;
  text-align: center;
  color: var(--text-soft);
}

.package-loader strong {
  display: block;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.loader-track {
  width: 200px;
  height: 4px;
  margin: 0 auto;
  background: rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  overflow: hidden;
}

.loader-track span {
  display: block;
  width: 60%;
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  animation: pkg-load 1.4s ease-in-out infinite;
}

@keyframes pkg-load {
  0% { width: 20%; transform: translateX(-20%); }
  50% { width: 70%; transform: translateX(10%); }
  100% { width: 20%; transform: translateX(100%); }
}

.topic-grid-package {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.topic-card-package {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.topic-card-package:hover {
  border-color: rgba(20, 184, 166, 0.4);
  background: rgba(20, 184, 166, 0.06);
  transform: translateY(-2px);
}

.topic-card-package .stage-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 8px;
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--accent);
  text-transform: uppercase;
}

.topic-card-package h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
}

.topic-card-package p {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
  flex: 1;
}

.topic-card-package .topic-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.topic-card-package .topic-meta-row .concept-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent-2);
}