:root {
  --bg-color: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.5);
  --border-color: #334155;
  --warning: #ef4444;
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 15px var(--accent-glow);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  padding: 2rem;
  text-align: center;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 10;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.lang-selector {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.lang-selector a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.lang-selector a:hover, .lang-selector a.active {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--accent-glow);
}

main {
  flex: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.4s ease-out forwards;
}

.tab-pane.active {
  display: block;
}

.tabs-header {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--bg-hover);
  padding-bottom: 0px;
}

.tab-btn {
  background: transparent;
  color: var(--text-secondary);
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  font-family: inherit;
  border-radius: 8px 8px 0 0;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.tab-btn.active {
  color: var(--accent);
  background: var(--bg-card);
}

.tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  box-shadow: 0 -2px 10px var(--accent-glow);
}

.option-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.option-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  background: var(--bg-hover);
}

/* Custom Checkbox */
.option-card input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  min-width: 24px;
  background-color: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  display: grid;
  place-content: center;
  transition: all 0.2s ease;
}

.option-card input[type="checkbox"]::before {
  content: "";
  width: 12px;
  height: 12px;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
  transform: scale(0);
  background-color: white;
  transition: 120ms transform ease-in-out;
}

.option-card input[type="checkbox"]:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}

.option-card input[type="checkbox"]:checked::before {
  transform: scale(1);
}

.option-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.option-content .desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.option-content .consequence {
  font-size: 0.85rem;
  color: var(--warning);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 6px;
  border-left: 3px solid var(--warning);
}

.download-container {
  position: sticky;
  bottom: 2rem;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  pointer-events: none;
}

.download-btn {
  pointer-events: auto;
  background: var(--accent);
  color: white;
  border: none;
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 9999px;
  cursor: pointer;
  box-shadow: var(--shadow-md), 0 0 20px rgba(59, 130, 246, 0.4);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.download-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05) translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 30px rgba(59, 130, 246, 0.6);
}

.download-btn:active {
  transform: scale(0.95);
}

.admin-warning {
  pointer-events: auto;
  font-size: 0.85rem;
  color: var(--warning);
  background: var(--bg-card);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  border: 1px solid var(--warning);
  box-shadow: var(--shadow-sm);
}

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

.option-card {
  animation: fadeIn 0.4s ease-out forwards;
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}