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

html,
body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: #f5f5f7;
}

/* Main Layout Container */
#layout {
  display: flex;
  width: 100vw;
  height: 100vh;
  background: #f5f5f7;
}

/* Sidebar Holder */
#sidebar-holder {
  width: 280px;
  height: 100%;
  background: #fafafa;
  border-right: 1px solid #d1d1d6;
  display: flex;
  flex-direction: column;
}

/* Window Controls */
.window-controls {
  display: flex;
  align-items: center;
  height: 52px;
  padding: 0 16px;
  gap: 8px;
  border-bottom: 1px solid #e5e5e7;
  background: #fafafa;
}

.control-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

.control-dot.close {
  background: #ff5f56;
}

.control-dot.minimize {
  background: #ffbd2e;
}

.control-dot.maximize {
  background: #27ca3f;
}

/* Sidebar Content */
.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
  scrollbar-width: thin;
}

.sidebar-section {
  margin-bottom: 24px;
}

.section-header {
  font-size: 11px;
  font-weight: 600;
  color: #86868b;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin: 0 16px 8px 16px;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  margin: 0 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 14px;
  font-weight: 400;
  color: #1d1d1f;
  position: relative;
}

.menu-item:hover {
  background: #e8e8ed;
}

.menu-item.active {
  background: #007aff;
  color: white;
}

.menu-item.active .menu-icon {
  color: white;
}

.menu-item.active .menu-count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.menu-icon {
  width: 16px;
  height: 16px;
  margin-right: 12px;
  color: #86868b;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-text {
  flex: 1;
}

.menu-count {
  background: #e5e5e7;
  color: #86868b;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

/* Collapsible sections */
.collapsible-header {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  margin: 0 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 14px;
  font-weight: 500;
  color: #1d1d1f;
}

.collapsible-header:hover {
  background: #e8e8ed;
}

.collapse-icon {
  width: 16px;
  height: 16px;
  margin-right: 8px;
  color: #86868b;
  font-size: 12px;
  transition: transform 0.2s ease;
}

.collapse-icon.expanded {
  transform: rotate(90deg);
}

.collapsible-content {
  margin-left: 24px;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.collapsible-content.collapsed {
  max-height: 0;
}

.collapsible-content:not(.collapsed) {
  max-height: 500px;
}

/* Profile Section */
.profile-section {
  margin-top: auto;
  padding: 16px;
  border-top: 1px solid #e5e5e7;
  background: #fafafa;
}

.profile-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.profile-item:hover {
  background: #e8e8ed;
}

.profile-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 12px;
}

.profile-info {
  flex: 1;
}

.profile-name {
  font-size: 14px;
  font-weight: 500;
  color: #1d1d1f;
  line-height: 1.2;
}

.profile-status {
  font-size: 12px;
  color: #86868b;
  line-height: 1.2;
}

/* Videos Container */
#videos-container {
  flex: 1;
  height: 100%;
  padding: 32px;
  overflow-y: auto;
  background: #f5f5f7;
}

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

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: #1d1d1f;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.page-subtitle {
  font-size: 16px;
  color: #86868b;
  font-weight: 400;
}

/* Hamburger menu styles */
.hamburger {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1001;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 8px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 3px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hamburger span {
  width: 16px;
  height: 1.5px;
  background: #1d1d1f;
  transition: all 0.3s ease;
  border-radius: 1px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(2px, 4px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(3px, -5px);
}

/* Overlay for Mobile */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  z-index: 999;
}

.overlay.active {
  display: block;
}

/* Apple-style Video Cards */
.video-card {
  position: relative;
  height: 320px;
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  background: white;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transform: translateY(0) scale(1);
}

.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

.video-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 65%;
  object-fit: cover;
  transition: all 0.4s ease;
}

.video-card:hover .video-thumbnail {
  transform: scale(1.05);
}

.video-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 35%;
  padding: 20px;
  background: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.video-title {
  color: #1d1d1f;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  letter-spacing: -0.01em;
}

.video-meta {
  color: #86868b;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.play-indicator {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(20px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
}

.video-card:hover .play-indicator {
  opacity: 1;
  transform: scale(1);
}

.play-icon {
  color: white;
  font-size: 14px;
  margin-left: 2px;
}

.duration-badge {
  position: absolute;
  bottom: 16px;
  right: 16px;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(20px);
  color: white;
  font-size: 11px;
  font-weight: 500;
  border-radius: 4px;
}

/* Smooth scroll */
#videos-container::-webkit-scrollbar {
  width: 8px;
}

#videos-container::-webkit-scrollbar-track {
  background: transparent;
}

#videos-container::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

#videos-container::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.3);
}

/* Grid */
#video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* Add button */
.add-button {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 20px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  color: #86868b;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.2s ease;
}

.sidebar-section:hover .add-button {
  opacity: 1;
}

.add-button:hover {
  color: #007aff;
  transform: scale(1.1);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  #sidebar-holder {
    position: fixed;
    width: 280px !important;
    height: 100vh !important;
    top: 0;
    left: 0;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  #sidebar-holder.open {
    transform: translateX(0);
  }

  .hamburger {
    display: flex;
  }

  #videos-container {
    width: 100% !important;
    margin-left: 0;
  }

  .page-title {
    font-size: 28px;
  }

  #video-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 768px) {
  #videos-container {
    padding: 20px;
  }

  #video-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .video-card {
    height: 400px;
  }

  .page-header {
    justify-self: center;
    text-align: center;
  }

  .page-title {
    font-size: 24px;
  }
}