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

:root {
  --bg-darkest: #0e0e12;
  --bg-dark: #141419;
  --bg-sidebar: #18181f;
  --bg-card: #1e1e28;
  --bg-hover: #262633;
  --bg-active: #2c2c3a;
  --border: #2a2a38;
  --text-primary: #e8e8ed;
  --text-secondary: #8b8b9e;
  --text-muted: #555568;
  --accent: #667eea;
  --accent-glow: rgba(102, 126, 234, 0.3);
  --green: #4ade80;
  --green-dark: #22c55e;
  --red: #ef4444;
  --blue: #3b82f6;
  --yellow: #f59e0b;
}

body {
  background: var(--bg-darkest);
  color: var(--text-primary);
  font-family: 'Segoe UI', 'Microsoft YaHei', -apple-system, sans-serif;
  height: 100vh;
  overflow: hidden;
  user-select: none;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部导航栏 ===== */
.navbar {
  height: 48px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  -webkit-app-region: drag;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.brand-icon {
  color: var(--accent);
}

.brand-text {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.navbar-search {
  position: relative;
  -webkit-app-region: no-drag;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.navbar-search input {
  background: var(--bg-darkest);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px 6px 32px;
  color: var(--text-primary);
  font-size: 13px;
  width: 240px;
  outline: none;
  transition: all 0.2s;
}

.navbar-search input::placeholder {
  color: var(--text-muted);
}

.navbar-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
  width: 300px;
}

/* ===== 主体布局 ===== */
.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ===== 左侧边栏 ===== */
.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar::-webkit-scrollbar {
  width: 5px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

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

.sidebar-empty {
  color: var(--text-muted);
  text-align: center;
  padding: 40px 16px;
  font-size: 14px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  margin-bottom: 2px;
  position: relative;
}

.sidebar-item:hover {
  background: var(--bg-hover);
  transform: translateX(2px);
}

.sidebar-item.active {
  background: var(--bg-active);
  transform: translateX(3px);
}

.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
  animation: barGrow 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes barGrow {
  from { height: 0; }
  to { height: 60%; }
}

.sidebar-icon {
  font-size: 26px;
  line-height: 1;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-genre {
  font-size: 11px;
  color: var(--text-muted);
}

.sidebar-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.sidebar-item:hover .sidebar-arrow {
  opacity: 1;
}

.sidebar-item.active .sidebar-arrow {
  opacity: 1;
  color: var(--accent);
  transform: translateX(2px);
}

/* ===== 右侧内容区 ===== */
.content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-darkest);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.content::-webkit-scrollbar {
  width: 5px;
}

.content::-webkit-scrollbar-track {
  background: transparent;
}

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

/* ===== 欢迎屏 ===== */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
  opacity: 0.6;
}

.welcome-icon svg {
  filter: drop-shadow(0 0 30px var(--accent-glow));
}

.welcome-screen h1 {
  font-size: 22px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 8px;
}

.welcome-screen p {
  font-size: 14px;
  color: var(--text-muted);
}

.welcome-stats {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.stat-divider {
  color: var(--border);
}

/* ===== 游戏详情页 ===== */
.game-detail {
  opacity: 0;
}

.game-detail.fade-in {
  animation: detailReveal 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes detailReveal {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* --- Hero区域协调入场 --- */
.game-detail.fade-in .detail-hero {
  animation: heroSlide 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes heroSlide {
  from { opacity: 0; transform: translateY(-20px) scale(1.01); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 图标弹入 */
.game-detail.fade-in .hero-icon {
  animation: iconPop 0.5s 0.1s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes iconPop {
  from { opacity: 0; transform: scale(0.3) rotate(-10deg); }
  to { opacity: 1; transform: scale(1) rotate(0deg); }
}

/* 标题滑入 */
.game-detail.fade-in .hero-info h1 {
  animation: titleSlide 0.4s 0.2s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes titleSlide {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* 标签依次浮现 */
.game-detail.fade-in .hero-tags .tag {
  opacity: 0;
  animation: tagFade 0.35s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.game-detail.fade-in .hero-tags .tag:nth-child(1) { animation-delay: 0.3s; }
.game-detail.fade-in .hero-tags .tag:nth-child(2) { animation-delay: 0.4s; }
.game-detail.fade-in .hero-tags .tag:nth-child(3) { animation-delay: 0.5s; }
.game-detail.fade-in .hero-tags .tag:nth-child(4) { animation-delay: 0.6s; }

@keyframes tagFade {
  from { opacity: 0; transform: translateY(8px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- 详情主体协调入场 --- */

/* 操作区滑入 */
.game-detail.fade-in .detail-actions {
  animation: actionsIn 0.4s 0.3s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes actionsIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 开始按钮弹入 */
.game-detail.fade-in .play-btn {
  animation: btnIn 0.4s 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes btnIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

/* 详情段落依次滑入 */
.game-detail.fade-in .detail-body > .detail-section {
  opacity: 0;
  animation: sectionIn 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.game-detail.fade-in .detail-body > :nth-child(2).detail-section { animation-delay: 0.5s; }
.game-detail.fade-in .detail-body > :nth-child(3).detail-section { animation-delay: 0.65s; }

@keyframes sectionIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 信息卡片依次弹入 */
.game-detail.fade-in .info-item {
  opacity: 0;
  animation: cardIn 0.35s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.game-detail.fade-in .info-item:nth-child(1) { animation-delay: 0.7s; }
.game-detail.fade-in .info-item:nth-child(2) { animation-delay: 0.8s; }
.game-detail.fade-in .info-item:nth-child(3) { animation-delay: 0.9s; }
.game-detail.fade-in .info-item:nth-child(4) { animation-delay: 1.0s; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(8px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Hero 区域 */
.detail-hero {
  position: relative;
  height: 220px;
  background: linear-gradient(135deg, #1a1a3e 0%, #0e2a4a 50%, #1a0e3a 100%);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg-darkest) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 32px;
}

.hero-icon {
  font-size: 72px;
  line-height: 1;
  filter: drop-shadow(0 4px 20px rgba(0,0,0,0.5));
}

.hero-info h1 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.hero-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  background: rgba(102, 126, 234, 0.15);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(102, 126, 234, 0.2);
}

/* 详情主体 */
.detail-body {
  padding: 0 32px 40px;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.play-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--green-dark), #16a34a);
  color: #fff;
  border: none;
  padding: 12px 40px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.play-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
  background: linear-gradient(135deg, var(--green), #22c55e);
}

.play-btn:active {
  transform: translateY(0);
}

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

.detail-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.detail-section p {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
}

/* 游戏信息网格 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.info-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-value {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.status-ready {
  color: var(--green);
}

.status-ready::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  box-shadow: 0 0 6px var(--green);
}

/* ===== 启动动画 ===== */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #08080c;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease;
}

.splash-exit {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
}

.splash-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  z-index: 2;
}

/* Logo */
.splash-logo {
  opacity: 0;
  animation: splashLogoIn 1.2s 0.5s ease-out forwards;
}

@keyframes splashLogoIn {
  0% { opacity: 0; transform: scale(0.5) rotate(-10deg); }
  60% { opacity: 1; transform: scale(1.08) rotate(2deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

.splash-icon {
  filter: drop-shadow(0 0 25px rgba(102, 126, 234, 0.5));
}

/* 手柄轮廓描边动画 */
.splash-body {
  stroke-dasharray: 300;
  stroke-dashoffset: 300;
  animation: splashDraw 1.8s 1.0s ease forwards;
}

@keyframes splashDraw {
  to { stroke-dashoffset: 0; }
}

.splash-stick-l {
  opacity: 0;
  animation: splashPartIn 0.5s 2.0s ease forwards;
}

.splash-dpad {
  opacity: 0;
  animation: splashPartIn 0.5s 2.2s ease forwards;
}

.splash-btn {
  opacity: 0;
  animation: splashPartIn 0.4s ease forwards;
}
.splash-btn-y { animation-delay: 2.4s; }
.splash-btn-b { animation-delay: 2.6s; }
.splash-btn-a { animation-delay: 2.8s; }
.splash-btn-x { animation-delay: 3.0s; }

@keyframes splashPartIn {
  from { opacity: 0; transform: scale(0); }
  to { opacity: 1; transform: scale(1); }
}

/* 标题文字 */
.splash-text {
  opacity: 0;
  animation: splashTextIn 0.9s 1.5s ease forwards;
}

@keyframes splashTextIn {
  0% { opacity: 0; letter-spacing: 12px; filter: blur(8px); }
  100% { opacity: 1; letter-spacing: 6px; filter: blur(0); }
}

.splash-title {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  background: linear-gradient(135deg, #667eea, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 进度条 */
.splash-bar-track {
  width: 200px;
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
  opacity: 0;
  animation: splashBarIn 0.5s 2.5s ease forwards;
}

@keyframes splashBarIn {
  to { opacity: 1; }
}

.splash-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #667eea, #a855f7);
  border-radius: 3px;
  transition: width 0.15s ease-out;
  box-shadow: 0 0 8px rgba(102, 126, 234, 0.5);
}

/* 粒子 */
.splash-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
}

.splash-particle {
  position: absolute;
  background: rgba(102, 126, 234, 0.4);
  border-radius: 50%;
  animation: splashFloat linear infinite;
}

@keyframes splashFloat {
  0% { transform: translateY(0) scale(1); opacity: 0; }
  20% { opacity: 0.6; }
  80% { opacity: 0.3; }
  100% { transform: translateY(-120px) scale(0); opacity: 0; }
}

/* ===== 联机按钮 ===== */
.mp-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  color: #fff;
  border: none;
  padding: 12px 32px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.mp-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.mp-btn:active {
  transform: translateY(0);
}

/* ===== 全屏按钮 ===== */
.fullscreen-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #475569, #334155);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(71, 85, 105, 0.3);
}

.fullscreen-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(71, 85, 105, 0.4);
  background: linear-gradient(135deg, #64748b, #475569);
}

.fullscreen-btn:active {
  transform: translateY(0);
}

/* ===== 联机面板 ===== */
.mp-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 20px;
  overflow: hidden;
  animation: mpSlideIn 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes mpSlideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mp-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(102, 126, 234, 0.05);
}

.mp-panel-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.mp-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.2s;
}

.mp-close-btn:hover {
  color: var(--text-primary);
}

.mp-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.mp-tab {
  flex: 1;
  padding: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
}

.mp-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.mp-tab:hover:not(.active) {
  color: var(--text-secondary);
  background: var(--bg-hover);
}

.mp-tab-content {
  display: none;
  padding: 16px;
}

.mp-tab-content.active {
  display: block;
}

.mp-field {
  margin-bottom: 12px;
}

.mp-field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mp-field input {
  width: 100%;
  background: var(--bg-darkest);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.mp-field input:focus {
  border-color: var(--accent);
}

.mp-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.mp-code-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-darkest);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
}

.mp-code-box code {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  font-family: 'Consolas', 'Courier New', monospace;
}

.mp-copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  padding: 4px 6px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
}

.mp-copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.mp-copy-btn.copied {
  color: var(--green);
  border-color: var(--green);
}

.mp-players {
  margin-top: 14px;
}

.mp-player-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mp-player-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--bg-darkest);
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-primary);
}

.mp-player-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

.mp-player-dot.host {
  background: var(--accent);
}

.mp-action-btn {
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 4px;
}

.mp-action-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.mp-start-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, var(--green-dark), #16a34a);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 14px;
}

.mp-start-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.mp-stop-btn {
  width: 100%;
  padding: 8px;
  background: none;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 8px;
}

.mp-stop-btn:hover {
  color: var(--red);
  border-color: var(--red);
}

.mp-join-status {
  font-size: 13px;
  margin-top: 8px;
  min-height: 18px;
}