:root {
  --bg-color: #f8fafc;
  --surface: #ffffff;
  --border: #f1f5f9;
  --border-strong: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #10b981;
  --error: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* TOP NAVBAR (Super Premium) */
.top-navbar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-strong);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.lang-dropdown-wrapper {
  position: relative;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background: var(--bg-color);
  border: 1px solid var(--border-strong);
}
.lang-dropdown-wrapper:hover .lang-dropdown {
  display: flex;
}
.lang-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  flex-direction: column;
  padding: 0.5rem;
  box-shadow: var(--shadow-lg);
  gap: 0.2rem;
  min-width: 120px;
}
.lang-dropdown a {
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: 4px;
}
.lang-dropdown a:hover { background: var(--bg-color); color: var(--text-main); }
.lang-dropdown a.active { font-weight: 800; color: var(--primary); background: #eff6ff;}

/* Layout */
.layout-container {
  display: flex;
  max-width: 1300px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  gap: 3rem;
  align-items: flex-start;
}

/* Sidebar (Premium Agency Style) */
.sidebar { 
  width: 330px; 
  flex-shrink: 0; 
  position: sticky;
  top: 90px;
  height: calc(100vh - 120px);
  overflow-y: auto;
  padding-right: 15px;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 10px; }

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sidebar-category {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.sidebar-category summary {
  padding: 1.25rem 1.25rem;
  font-weight: 800;
  cursor: pointer;
  background: var(--bg-color);
  user-select: none;
  font-size: 0.85rem;
  color: var(--primary);
  border-bottom: 1px solid transparent;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  list-style: none; /* Standart Safari oku sil*/
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sidebar-category summary::-webkit-details-marker { display: none; } /* Chrome gizleme */
.sidebar-category summary::after { content: '▼'; font-size: 0.70rem; color: var(--text-muted); transition: transform 0.2s; }
.sidebar-category[open] summary::after { content: '▲'; color: var(--primary); }
.sidebar-category summary:hover { background: #f1f5f9; }
.sidebar-category[open] summary { border-bottom-color: var(--border-strong); }

.sidebar-list { list-style: none; display: flex; flex-direction: column; gap: 0.25rem; padding: 0.5rem; }
.sidebar-list a {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  text-decoration: none;
  border-radius: 12px;
  color: var(--text-muted);
  transition: all 0.2s;
  border: 1px solid transparent;
}
.sidebar-list a:hover {
  background: var(--surface);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  color: var(--text-main);
  transform: translateY(-1px);
}
.sidebar-list a.active {
  background: var(--surface);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  color: var(--text-main);
}
.link-icon {
  font-size: 1.25rem;
  margin-right: 1rem;
  width: 24px;
  text-align: center;
}
.link-content strong { display: block; font-size: 0.95rem; font-weight: 700; }
.link-content span { display: block; font-size: 0.8rem; line-height: 1.3; margin-top: 0.1rem; }

/* Main Wrapper */
.main-wrapper { flex-grow: 1; min-width: 0; }

/* Game Dashboard */
.game-container {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  padding: 3rem;
  margin-bottom: 2.5rem;
}
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3rem;
}
.game-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.stats-board {
  background: var(--bg-color);
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--border-strong);
}
.stat-value { color: var(--primary); font-size: 1.2rem; }

/* Canvas */
.game-canvas {
  background: var(--bg-color);
  border: 1px dashed #cbd5e1;
  border-radius: 12px;
  padding: 3rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
  margin-bottom: 3rem;
}

/* Options */
.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
@keyframes scaleIn {
  0% { transform: scale(0.6); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes popIn {
  0% { transform: scale(0.9) translateY(10px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}
@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% {transform: translateX(0);}
  25% {transform: translateX(-5px);}
  75% {transform: translateX(5px);}
}

.option-btn {
  background: var(--surface);
  border: 2px solid var(--border-strong);
  border-radius: 12px;
  padding: 1.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  outline: none;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.option-btn.correct { 
  background: var(--success); 
  border-color: var(--success); 
  color: white; 
  animation: pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); 
  z-index: 10;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}
.option-btn.wrong { 
  background: var(--error); 
  border-color: var(--error); 
  color: white; 
  animation: shake 0.4s ease; 
  opacity: 0.9;
}

/* Content Area */
.content-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.content-card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 2.5rem;
}
.content-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.content-card h2, .content-card h3 {
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.5px;
}
.content-card p {
  color: var(--text-muted);
  font-size: 1.05rem;
}
.faq-item {
  margin-bottom: 1.5rem;
}
.faq-item strong { display: block; color: var(--text-main); margin-bottom: 0.25rem; }
.faq-item p { font-size: 0.95rem; }

.embed-marketing-card {
  background: linear-gradient(to right bottom, #ffffff, #f8fafc);
  border: 1px solid var(--primary);
}
.code-editor-style {
  background: #1e293b;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  overflow-x: auto;
}
.code-editor-style code {
  font-family: 'SFMono-Regular', Consolas, Menlo, monospace;
  color: #38bdf8;
  font-size: 0.9rem;
}

@media (max-width: 1000px) {
  .layout-container { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-strong); padding-bottom: 2rem; }
  .options-grid { grid-template-columns: 1fr; }
  .content-grid-2 { grid-template-columns: 1fr; }
}

/* FOOTER */
.main-footer {
  background: #f8fafc;
  border-top: 1px solid var(--border-strong);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
  text-align: center;
}
.footer-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
}
.footer-links a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.2s;
}
.footer-links a:hover {
  opacity: 0.7;
}

@media (max-width: 600px) {
  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}