/* 基础样式 - 优化版本2.0：大幅提高移动端性能和用户体验 */
:root {
  /* 主题颜色 */
  --primary-color: #00e5ff;
  --fire-color: #ff5722;
  --electric-color: #b388ff;
  --light-color: #ffeb3b;
  --bg-color: #121212;
  --text-color: #ffffff;
  --panel-bg: rgba(0, 0, 0, 0.7);

  /* 移动端优化变量 */
  --safe-area-inset-top: env(safe-area-inset-top, 0px);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 20px);
  --safe-area-inset-left: env(safe-area-inset-left, 0px);
  --safe-area-inset-right: env(safe-area-inset-right, 0px);

  /* 性能优化变量 */
  --animation-duration-fast: 0.2s;
  --animation-duration-normal: 0.3s;
  --animation-duration-slow: 0.5s;
  --blur-radius: 10px;
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 15px rgba(0, 0, 0, 0.2);
  --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.3);

  /* 响应式设计变量 */
  --spacing-small: 5px;
  --spacing-medium: 10px;
  --spacing-large: 20px;
  --border-radius-small: 5px;
  --border-radius-medium: 10px;
  --border-radius-large: 20px;
  --border-radius-circle: 50%;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent; /* 移除移动端点击高亮 */
  -webkit-touch-callout: none; /* 禁用iOS长按菜单 */
  -webkit-user-select: none; /* Safari */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE/Edge */
  user-select: none; /* 标准语法 */
}

html {
  font-size: 16px; /* 基础字体大小 */
  line-height: 1.5;
  height: 100%;
  width: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden;
  touch-action: none; /* 禁用浏览器默认触摸行为 */
  height: 100vh;
  height: calc(var(--vh, 1vh) * 100); /* 移动端高度修复 */
  width: 100vw;
  overscroll-behavior: none; /* 防止下拉刷新 */
  position: fixed; /* 防止iOS上的弹性滚动 */

  /* 性能优化 */
  will-change: transform; /* 提示浏览器优化渲染 */
  backface-visibility: hidden; /* 减少复合层 */
  -webkit-font-smoothing: antialiased; /* 字体平滑 */
  -moz-osx-font-smoothing: grayscale;

  /* 添加渐变背景 */
  background-image: radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
                    radial-gradient(circle at 90% 80%, rgba(255, 87, 34, 0.05) 0%, transparent 40%);
}

/* 容器样式 */
.container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}

/* 添加淡入淡出动画 */
.fade-in {
  animation: fadeIn var(--animation-duration-normal) ease forwards;
}

.fade-out {
  animation: fadeOut var(--animation-duration-normal) ease forwards;
}

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

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

/* 返回链接 */
.back-link {
  position: fixed;
  top: 15px;
  right: 15px;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.6);
  color: var(--text-color);
  padding: 8px 15px;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.9rem;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.back-link:hover {
  background: rgba(0, 0, 0, 0.8);
  border-color: var(--primary-color);
}

/* 开始屏幕 */
.start-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-color);
  z-index: 100;
  padding: 20px;
  text-align: center;
}

.title {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, var(--primary-color), var(--fire-color), var(--electric-color), var(--light-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.subtitle {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.8;
}

.upload-container {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.upload-btn {
  background: linear-gradient(45deg, var(--primary-color), var(--electric-color));
  color: #000;
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 1rem;
  display: inline-block;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 229, 255, 0.4);
}

.upload-hint {
  font-size: 0.9rem;
  opacity: 0.6;
}

.start-btn {
  background: linear-gradient(45deg, var(--fire-color), var(--light-color));
  color: #000;
  padding: 15px 40px;
  border: none;
  border-radius: 30px;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.start-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 20px rgba(255, 87, 34, 0.5);
}

/* 主画布 */
#rippleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  display: block; /* 确保画布正确显示 */
  touch-action: none; /* 防止浏览器默认触摸行为 */
  will-change: transform; /* 性能优化提示 */
}

/* 控制面板 */
.control-panel {
  position: absolute;
  bottom: calc(20px + var(--safe-area-inset-bottom)); /* 适配全面屏 */
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 500px;
  padding: 0 20px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.control-panel.mobile {
  max-width: 95%;
  padding: 0 10px;
}

.element-selector {
  display: flex;
  justify-content: center;
  background: var(--panel-bg);
  border-radius: 50px;
  padding: 5px;
  margin-bottom: 15px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari 支持 */
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.element-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: transparent;
  border: none;
  color: var(--text-color);
  padding: 10px 15px;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0 5px;
  position: relative;
  overflow: hidden;
}

.element-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 70%);
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: transform 0.5s, opacity 0.5s;
  pointer-events: none;
}

.element-btn:active::after {
  transform: translate(-50%, -50%) scale(2);
  opacity: 1;
  transition: transform 0.2s, opacity 0.2s;
}

.element-btn.active {
  background: rgba(255, 255, 255, 0.2);
}

.element-btn[data-element="water"].active {
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.5);
}

.element-btn[data-element="fire"].active {
  box-shadow: 0 0 15px rgba(255, 87, 34, 0.5);
}

.element-btn[data-element="electric"].active {
  box-shadow: 0 0 15px rgba(179, 136, 255, 0.5);
}

.element-btn[data-element="light"].active {
  box-shadow: 0 0 15px rgba(255, 235, 59, 0.5);
}

.element-icon {
  font-size: 1.5rem;
  margin-bottom: 5px;
  transition: transform 0.2s ease;
}

.element-btn:active .element-icon {
  transform: scale(0.9);
}

.element-btn[data-element="water"] .element-icon {
  text-shadow: 0 0 5px var(--primary-color);
}

.element-btn[data-element="fire"] .element-icon {
  text-shadow: 0 0 5px var(--fire-color);
}

.element-btn[data-element="electric"] .element-icon {
  text-shadow: 0 0 5px var(--electric-color);
}

.element-btn[data-element="light"] .element-icon {
  text-shadow: 0 0 5px var(--light-color);
}

.element-name {
  font-size: 0.8rem;
}

/* 设置面板 */
.settings-panel {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 15px;
}

.settings-toggle, .audio-toggle {
  background: var(--panel-bg);
  border: none;
  color: var(--text-color);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari 支持 */
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}

.settings-toggle::after, .audio-toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 70%);
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: transform 0.5s, opacity 0.5s;
  pointer-events: none;
}

.settings-toggle:active::after, .audio-toggle:active::after {
  transform: translate(-50%, -50%) scale(2);
  opacity: 1;
  transition: transform 0.2s, opacity 0.2s;
}

.settings-toggle:hover, .audio-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.settings-toggle.active {
  background: linear-gradient(45deg, var(--primary-color), var(--electric-color));
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
}

.audio-toggle.muted {
  background: linear-gradient(45deg, #ff5722, #ff9800);
  box-shadow: 0 0 15px rgba(255, 87, 34, 0.3);
}

.settings-icon, .audio-icon {
  font-size: 1.5rem;
  transition: transform 0.2s ease;
}

.settings-toggle:active .settings-icon, .audio-toggle:active .audio-icon {
  transform: scale(0.9);
}

/* 音频静音图标 */
.audio-toggle.muted .audio-icon::after {
  content: '🔇';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
}

.settings-menu {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-bg);
  border-radius: 15px;
  padding: 15px;
  width: 100%;
  max-width: 300px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari 支持 */
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  opacity: 1;
  transform-origin: bottom center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  z-index: 20;
}

.settings-menu.mobile {
  max-width: 280px;
  padding: 12px;
  bottom: calc(60px + var(--safe-area-inset-bottom)); /* 适配全面屏 */
}

.settings-menu.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(20px) scale(0.9);
  pointer-events: none;
  visibility: hidden;
}

.setting-item {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.setting-item label {
  width: 60px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
}

.setting-item input[type="range"] {
  flex: 1;
  height: 10px; /* 增加高度，更易于触摸 */
  -webkit-appearance: none;
  background: linear-gradient(to right, var(--primary-color), var(--fire-color));
  outline: none;
  border-radius: 10px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

.setting-item input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; /* 增大滑块大小 */
  height: 22px; /* 增大滑块大小 */
  border-radius: 50%;
  background: var(--text-color);
  cursor: pointer;
  border: 2px solid var(--primary-color);
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

.setting-item input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--text-color);
  cursor: pointer;
  border: 2px solid var(--primary-color);
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

.setting-item.checkbox {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
}

.setting-item.checkbox input {
  width: 24px; /* 增大复选框大小 */
  height: 24px; /* 增大复选框大小 */
  accent-color: var(--primary-color); /* 设置复选框颜色 */
}

.reset-btn, .upload-new-btn {
  width: 100%;
  padding: 12px; /* 增大按钮高度 */
  margin-top: 10px;
  border: none;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
  position: relative;
  overflow: hidden;
}

.reset-btn::after, .upload-new-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 70%);
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: transform 0.5s, opacity 0.5s;
  pointer-events: none;
}

.reset-btn:active::after, .upload-new-btn:active::after {
  transform: translate(-50%, -50%) scale(2);
  opacity: 1;
  transition: transform 0.2s, opacity 0.2s;
}

.reset-btn:hover, .upload-new-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.reset-btn:active, .upload-new-btn:active {
  transform: scale(0.98);
}

/* 添加新的动态样式 */
.toast {
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 10px 20px;
  border-radius: 20px;
  z-index: 1000;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-weight: bold;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  opacity: 1;
  transition: opacity 0.5s;
}

.loading-indicator.fade-out {
  opacity: 0;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

.loading-text {
  color: white;
  font-size: 1.2rem;
}

.error-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(255, 0, 0, 0.2);
  color: white;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  z-index: 2000;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 0, 0, 0.5);
  max-width: 80%;
}

.retry-button {
  margin-top: 15px;
  padding: 8px 20px;
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: white;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.retry-button:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 响应式调整 */
@media (max-width: 600px) {
  html {
    font-size: 14px; /* 小屏幕上减小基础字体大小 */
  }

  .title {
    font-size: 2.2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .element-btn {
    padding: 8px 12px;
    min-width: 60px; /* 确保按钮有足够的触摸区域 */
  }

  .element-icon {
    font-size: 1.2rem;
  }

  .element-name {
    font-size: 0.7rem;
  }

  .settings-toggle {
    width: 45px;
    height: 45px;
  }

  .settings-icon {
    font-size: 1.3rem;
  }

  .setting-item label {
    width: 50px;
    font-size: 0.8rem;
  }

  /* 增强移动端触摸体验 */
  .setting-item input[type="range"] {
    height: 20px; /* 更大的滑块区域 */
  }

  .setting-item input[type="range"]::-webkit-slider-thumb {
    width: 28px; /* 更大的滑块 */
    height: 28px;
  }

  .setting-item input[type="range"]::-moz-range-thumb {
    width: 28px;
    height: 28px;
  }

  /* 增加按钮间距，防止误触 */
  .element-selector {
    gap: 5px;
  }

  /* 优化移动端动画性能 */
  .element-btn::after,
  .settings-toggle::after,
  .reset-btn::after,
  .upload-new-btn::after {
    display: none; /* 移动端禁用复杂动画效果 */
  }
}

/* 小屏幕手机 */
@media (max-width: 360px) {
  .element-btn {
    padding: 6px 8px;
    min-width: 50px;
  }

  .element-icon {
    font-size: 1.1rem;
    margin-bottom: 2px;
  }

  .element-name {
    font-size: 0.6rem;
  }

  .settings-menu {
    max-width: 250px;
    padding: 10px;
  }
}

/* 横屏模式优化 */
@media (max-height: 500px) {
  .control-panel {
    bottom: 10px;
  }

  .element-selector {
    margin-bottom: 10px;
    flex-wrap: wrap; /* 允许按钮换行 */
    justify-content: center;
  }

  .settings-menu {
    bottom: 50px;
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch; /* 平滑滚动 */
  }

  /* 横屏模式下调整开始屏幕布局 */
  .start-screen {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: center;
    padding: 10px;
  }

  .title {
    width: 100%;
    font-size: 2rem;
    margin-bottom: 0.5rem;
  }

  .subtitle {
    width: 100%;
    font-size: 0.9rem;
    margin-bottom: 1rem;
  }

  .upload-container {
    margin-bottom: 1rem;
    margin-right: 1rem;
  }
}

/* 适配全面屏 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .control-panel {
    padding-bottom: env(safe-area-inset-bottom);
  }

  .settings-menu {
    padding-bottom: calc(env(safe-area-inset-bottom) / 2);
  }

  /* 适配刘海屏 */
  .back-link {
    top: calc(15px + var(--safe-area-inset-top));
    right: calc(15px + var(--safe-area-inset-right));
  }

  /* 适配底部手势区域 */
  .start-btn, .upload-btn {
    margin-bottom: calc(var(--spacing-medium) + var(--safe-area-inset-bottom));
  }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #ffffff;
    --panel-bg: rgba(0, 0, 0, 0.7);
  }
}

/* 亮色模式支持 */
@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #f5f5f5;
    --text-color: #121212;
    --panel-bg: rgba(255, 255, 255, 0.7);
  }

  .element-btn, .settings-toggle, .settings-menu, .reset-btn, .upload-new-btn {
    border: 1px solid rgba(0, 0, 0, 0.1);
  }

  .toast, .loading-indicator {
    background-color: rgba(255, 255, 255, 0.8);
    color: #121212;
    border: 1px solid rgba(0, 0, 0, 0.1);
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #00b8d4;
    --fire-color: #ff7043;
    --electric-color: #9575cd;
    --light-color: #ffee58;
  }

  .element-btn.active {
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
  }

  /* 增强对比度 */
  .element-btn, .settings-toggle, .reset-btn, .upload-new-btn {
    border: 2px solid rgba(255, 255, 255, 0.5);
  }

  .setting-item label {
    font-weight: bold;
  }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  .element-btn::after,
  .settings-toggle::after,
  .reset-btn::after,
  .upload-new-btn::after {
    display: none;
  }
}

/* 添加全屏按钮样式 */
.fullscreen-button {
  background: rgba(0, 0, 0, 0.3);
  border: none;
  border-radius: var(--border-radius-circle);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  cursor: pointer;
  margin-left: var(--spacing-medium);
  backdrop-filter: blur(var(--blur-radius));
  -webkit-backdrop-filter: blur(var(--blur-radius));
  transition: background var(--animation-duration-normal);
  box-shadow: var(--shadow-light);
}

.fullscreen-button:hover {
  background: rgba(0, 0, 0, 0.5);
}

.fullscreen-button:active {
  transform: scale(0.95);
}

.fullscreen-button i {
  font-size: 24px;
}