@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --bg-color: #08090a;
  --surface-color: #121316;
  --surface-light: #1f2127;
  --primary: #d4af37;
  --primary-hover: #f3c93f;
  --primary-glow: rgba(212, 175, 55, 0.15);
  --text-primary: #f8f8f8;
  --text-secondary: #9ba1a6;
  --border: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(18, 19, 22, 0.75);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Header */
.header {
  min-height: 120px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 5%;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.header-logo-img {
  height: 50px;
  width: auto;
  object-fit: contain;
}

.logo-text-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  color: var(--primary);
}

/* Home Grid */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 5%;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #fff, #9ba1a6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 40px;
  font-weight: 300;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.module-card {
  background: var(--surface-color);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 240px;
  justify-content: center;
}

.module-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 10px 30px var(--primary-glow);
}

.module-image {
  width: 100%;
  aspect-ratio: 16/9;
  background-color: var(--surface-light);
  position: relative;
  overflow: hidden;
}

.module-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  transition: var(--transition);
}

.module-card:hover .module-image img {
  transform: scale(1.05);
  opacity: 1;
}

.module-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.module-number {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.module-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}

.module-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 20px;
  flex: 1;
}

.module-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.module-card:hover .module-action {
  gap: 12px;
}

/* Lesson Layout */
.lesson-layout {
  display: flex;
  height: calc(100vh - 80px);
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 320px;
  background: var(--surface-color);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: var(--transition);
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.module-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  list-style: none;
}

.module-item {
  margin-bottom: 8px;
}

.module-link {
  display: flex;
  padding: 14px 16px;
  border-radius: 10px;
  color: var(--text-secondary);
  transition: var(--transition);
  font-size: 0.95rem;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid transparent;
}

.module-link:hover {
  background: var(--surface-light);
  color: var(--text-primary);
}

.module-link.active {
  background: rgba(212, 175, 55, 0.08);
  color: var(--primary);
  border-color: rgba(212, 175, 55, 0.2);
}

.module-link-num {
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: 2px;
  opacity: 0.7;
}

/* Main Content Area */
.lesson-main {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-color);
  position: relative;
}

/* Lesson Banner */
.lesson-banner {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.1) 0%, rgba(18, 19, 22, 1) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.banner-pattern {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.3;
}

/* Checklist Styles */
.checklist-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 30px 0;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--surface-color);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.checklist-item:hover {
  border-color: rgba(212, 175, 55, 0.4);
  background: var(--surface-light);
}

.checklist-item input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.checklist-item input:checked + .checkmark {
  background: var(--primary);
  border-color: var(--primary);
}

.checklist-item input:checked + .checkmark::after {
  content: "✓";
  color: #000;
  font-weight: bold;
}

.checklist-text {
  font-size: 1.1rem;
  color: var(--text-primary);
  line-height: 1.4;
  transition: var(--transition);
}

.checklist-item input:checked ~ .checklist-text {
  color: var(--text-secondary);
  text-decoration: line-through;
}

/* Lesson Details */
.lesson-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 5%;
}

.lesson-header {
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border);
}

.lesson-meta {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.lesson-title {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
}

.lesson-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.lesson-text p {
  margin-bottom: 24px;
}

.lesson-text h2, .lesson-text h3 {
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 16px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 80;
  opacity: 0;
  transition: var(--transition);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border);
}

/* Responsive */
@media (max-width: 992px) {
  .lesson-layout {
    flex-direction: column;
  }
  
  .mobile-toggle {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 80px;
    left: -100%;
    bottom: 0;
    z-index: 90;
    width: 300px;
    box-shadow: 10px 0 30px rgba(0,0,0,0.5);
  }

  .sidebar.active {
    left: 0;
  }
  
  .sidebar-overlay.active {
    display: block;
    opacity: 1;
  }
}

/* Negotiation Scripts */
.script-toggle-btn {
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 10px 16px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.script-toggle-btn:hover {
  background: var(--primary);
  color: #000;
}

.script-content-wrapper {
  margin-top: 16px;
  background: #1a1a1e;
  border-left: 3px solid var(--primary);
  border-radius: 4px 8px 8px 4px;
  padding: 20px;
  display: none;
}

.script-content-wrapper.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.script-bubble {
  background: #25262b;
  padding: 12px 16px;
  border-radius: 12px;
  border-bottom-left-radius: 2px;
  margin-bottom: 12px;
  font-family: monospace;
  font-size: 0.95rem;
  color: #e0e0e0;
  line-height: 1.5;
  white-space: pre-wrap;
  display: inline-block;
  max-width: 90%;
}

.script-step-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  margin-top: 16px;
  font-weight: 600;
}
.script-step-title:first-child {
  margin-top: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}