/* Reset và Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
  overflow-x: hidden;
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* Mobile Overlay */
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: #ffffff;
  border-right: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  z-index: 999;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.sidebar-avatar img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #3b82f6;
}

.sidebar-avatar span {
  font-weight: 600;
  font-size: 16px;
  color: #1e293b;
}

.sidebar-close {
  background: none;
  border: none;
  font-size: 20px;
  color: #64748b;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.sidebar-close:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.sidebar-nav {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  margin-bottom: 4px;
  border-radius: 12px;
  text-decoration: none;
  color: #64748b;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-item:hover {
  background: #f1f5f9;
  color: #1e293b;
  text-decoration: none;
}

.nav-item.active {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
}

.nav-item i {
  font-size: 18px;
  width: 20px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid #e2e8f0;
}

.btn-premium {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.2s ease;
}

.btn-premium:hover {
  transform: translateY(-2px);
  color: white;
  text-decoration: none;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 280px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  background: white;
  border-bottom: 1px solid #e2e8f0;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 24px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  background: none;
  border: none;
  font-size: 24px;
  color: #64748b;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.menu-toggle:hover {
  background: #f1f5f9;
  color: #1e293b;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  color: #1e293b;
  margin: 0;
}

.header-center {
  flex: 1;
  max-width: 480px;
}

.search-form {
  display: flex;
  gap: 8px;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #64748b;
  font-size: 16px;
}

.search-input {
  width: 100%;
  padding: 12px 12px 12px 40px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 14px;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-btn {
  padding: 12px 20px;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.search-btn:hover {
  transform: translateY(-1px);
}

.header-right {
  display: flex;
  align-items: center;
}

.avatar-link {
  display: block;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #3b82f6;
  transition: transform 0.2s ease;
}

.user-avatar:hover {
  transform: scale(1.05);
}

/* Content Wrapper */
.content-wrapper {
  flex: 1;
  padding: 32px 24px;
}

.page-content {
  display: none;
}

.page-content.active {
  display: block;
}

.section-header {
  margin-bottom: 32px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 16px;
  color: #64748b;
  margin: 0;
}

/* Games Grid */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.game-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.game-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.game-image {
  position: relative;
  overflow: hidden;
}

.game-image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.game-card:hover .game-image img {
  transform: scale(1.05);
}

.game-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.game-card:hover .game-overlay {
  opacity: 1;
}

.play-btn {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  padding: 12px 24px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.game-card:hover .play-btn {
  transform: translateY(0);
}

.play-btn:hover {
  color: white;
  text-decoration: none;
  transform: scale(1.05);
}

.game-info {
  padding: 20px;
}

.game-title {
  font-size: 18px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px;
}

.game-description {
  font-size: 14px;
  color: #64748b;
  line-height: 1.5;
  margin: 0;
}

/* Profile Page */
.profile-container {
  max-width: 600px;
  margin: 0 auto;
}

.profile-card {
  background: white;
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid #e2e8f0;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid #3b82f6;
}

.profile-name {
  font-size: 24px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 4px;
}

.profile-role {
  font-size: 16px;
  color: #64748b;
  margin: 0;
}

.profile-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.detail-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.detail-item i {
  color: #3b82f6;
  font-size: 18px;
  margin-top: 2px;
  width: 20px;
}

.detail-item span {
  font-weight: 600;
  color: #1e293b;
  min-width: 80px;
}

.detail-item a {
  color: #3b82f6;
  text-decoration: none;
}

.detail-item a:hover {
  text-decoration: underline;
}

.detail-item p {
  margin: 0;
  color: #64748b;
}

/* Contact Page */
.contact-container {
  max-width: 800px;
  margin: 0 auto;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}

.contact-form-wrapper {
  background: white;
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 14px;
  transition: all 0.2s ease;
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.submit-btn {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s ease;
}

.submit-btn:hover {
  transform: translateY(-2px);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-card {
  background: white;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.info-card h5 {
  font-size: 18px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 16px;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.info-item i {
  color: #3b82f6;
  font-size: 16px;
  width: 20px;
}

.info-item a {
  color: #3b82f6;
  text-decoration: none;
}

.info-item a:hover {
  text-decoration: underline;
}

/* Footer */
.app-footer {
  background: #1e293b;
  color: white;
  text-align: center;
  padding: 24px;
  margin-top: auto;
}

.app-footer p {
  margin: 0;
  font-size: 14px;
}

/* Mobile Styles */
@media (max-width: 991.98px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .app-header {
    padding: 16px;
  }
  
  .header-center {
    order: 3;
    width: 100%;
  }
  
  .page-title {
    font-size: 20px;
  }
  
  .content-wrapper {
    padding: 24px 16px;
  }
  
  .section-title {
    font-size: 24px;
  }
  
  .games-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .profile-header {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 767.98px) {
  .app-header {
    flex-wrap: wrap;
    gap: 16px;
  }
  
  .header-left,
  .header-right {
    flex: none;
  }
  
  .header-center {
    order: 2;
    width: 100%;
  }
  
  .search-form {
    flex-direction: column;
    gap: 12px;
  }
  
  .search-btn {
    width: 100%;
  }
  
  .content-wrapper {
    padding: 16px;
  }
  
  .section-header {
    margin-bottom: 24px;
  }
  
  .profile-card,
  .contact-form-wrapper,
  .info-card {
    padding: 20px;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-content.active {
  animation: fadeInUp 0.4s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Game Tooltip */
.game-tooltip {
  position: fixed;
  background: rgba(0, 0, 0, 0.95);
  color: white;
  padding: 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.4;
  max-width: 350px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: pre-line;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transform: none;
}

.game-tooltip.show {
  opacity: 1;
  visibility: visible;
}

.game-tooltip::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid rgba(0, 0, 0, 0.95);
}