* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

:root {
  --bg: #f5f3ef;
  --card: #ffffff;
  --text: #3d3935;
  --text-light: #9e9a94;
  --accent: #7fa16b;
  --accent-light: #98b886;
  --earth: #6b5c4d;
  --shadow: 0 4px 20px rgba(0,0,0,0.03);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.07);
  --radius: 20px;
}

html {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* === Intro === */
.intro-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #262b24;
  overflow: hidden;
  transition: opacity 1.5s ease, visibility 1.5s;
}
.intro-screen.exiting {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.intro-screen::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(127,161,107,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.intro-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 0 40px;
}

.intro-line {
  font-family: "Noto Serif SC", serif;
  font-size: 20px;
  font-weight: 300;
  color: rgba(255,255,255,0.9);
  line-height: 2.4;
  letter-spacing: 4px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1s, transform 1s;
  position: absolute;
  width: 100%;
  pointer-events: none;
}
.intro-line.visible {
  opacity: 1;
  transform: translateY(0);
  position: relative;
  pointer-events: auto;
}

.intro-hint {
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 3px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

.btn-start {
  margin-top: 40px;
  padding: 12px 36px;
  font-family: "Noto Serif SC", serif;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  border-radius: 50px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.4s;
  letter-spacing: 2px;
}
.btn-start.visible {
  opacity: 1;
}
.btn-start:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}

/* === Main Layout === */
.main-screen {
  position: relative;
  height: 100vh;
  display: none;
  overflow: hidden;
}
.main-screen.active {
  display: flex;
  flex-direction: column;
  animation: fadeIn 1.2s;
}

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

.main-layout {
  position: relative;
  z-index: 2;
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 30px;
  align-items: flex-start;
  flex: 1;
  min-height: 0;
}

/* === Panel Wrapper (折叠侧边栏) === */
.panel-wrapper {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
}

.panel-wrapper-left {
  left: 0;
}

.panel-wrapper-right {
  right: 0;
}

/* 面板本体 */
.side-panel-left,
.side-panel-right {
  transition: transform 0.3s ease;
}

.side-panel-left {
  transform: translateX(0);
}

.panel-wrapper-left.collapsed .side-panel-left {
  transform: translateX(calc(-100% - 24px));
}

.side-panel-right {
  transform: translateX(0);
}

.panel-wrapper-right.collapsed .side-panel-right {
  transform: translateX(calc(100% + 24px));
}

/* 折叠按钮 */
.panel-toggle-btn {
  position: absolute;
  top: 50%;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  color: var(--earth);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
  z-index: 101;
  transform: translateY(-50%);
  line-height: 1;
}

.panel-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
}

/* 左侧折叠按钮：展开时在面板右侧内侧 */
.panel-wrapper-left .panel-toggle-btn {
  right: -19px;
  border-radius: 0 50% 50% 0;
}

.panel-wrapper-left.collapsed .panel-toggle-btn {
  right: auto;
  left: 12px;
  border-radius: 50%;
}

/* 右侧折叠按钮：展开时在面板左侧内侧 */
.panel-wrapper-right .panel-toggle-btn {
  left: -19px;
  border-radius: 50% 0 0 50%;
}

.panel-wrapper-right.collapsed .panel-toggle-btn {
  left: auto;
  right: 12px;
  border-radius: 50%;
}

/* 折叠态按钮图标切换 */
.panel-wrapper-left:not(.collapsed) .panel-toggle-btn::before {
  content: "✕";
}

.panel-wrapper-right:not(.collapsed) .panel-toggle-btn::before {
  content: "✕";
}

.panel-wrapper-left.collapsed .panel-toggle-btn::before {
  content: "☰";
}

.panel-wrapper-right.collapsed .panel-toggle-btn::before {
  content: "☰";
}

/* 隐藏按钮内原始文字，用 ::before 伪元素替代 */
.panel-toggle-btn {
  color: transparent;
  font-size: 0;
}

.panel-toggle-btn::before {
  font-size: 18px;
  color: var(--earth);
}

/* Left Panel */
.left-panel {
  flex: 0 0 160px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-card .value {
  font-family: "Noto Serif SC", serif;
  font-size: 28px;
  color: var(--earth);
}
.stat-card .label {
  font-size: 11px;
  color: var(--text-light);
  margin-top: 6px;
  letter-spacing: 1px;
}

.action-btn {
  padding: 14px;
  border: none;
  border-radius: 14px;
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.action-btn:active {
  transform: scale(0.96);
}

.btn-water {
  background: linear-gradient(135deg, #7fa16b, #658a50);
  box-shadow: 0 4px 14px rgba(127,161,107,0.25);
}
.btn-shake-tree {
  background: linear-gradient(135deg, #d3aa7a, #bb8d56);
  box-shadow: 0 4px 14px rgba(211,170,122,0.2);
}

/* === 3D Container === */
.tree-panel {
  flex: 1;
  position: relative;
}

#threejsContainer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  cursor: grab;
}
#threejsContainer:active {
  cursor: grabbing;
}

.tree-tooltip {
  position: absolute;
  background: rgba(255,255,255,0.95);
  color: #3d3935;
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.25s cubic-bezier(0.2,1,0.3,1);
  z-index: 50;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  max-width: 200px;
  line-height: 1.5;
}
.tree-tooltip.show {
  opacity: 1;
  transform: translateY(0);
}
.tree-tooltip::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px 6px 0;
  border-style: solid;
  border-color: rgba(255,255,255,0.95) transparent transparent;
}

/* === Right Panel === */
.right-panel {
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.panel-card h3 {
  font-family: "Noto Serif SC", serif;
  font-size: 15px;
  color: var(--earth);
  margin-bottom: 16px;
  font-weight: 500;
  letter-spacing: 1px;
}

.btn-upload {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  transition: all 0.2s;
  box-shadow: 0 4px 14px rgba(127,161,107,0.2);
}
.btn-upload:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

.memory-list {
  max-height: 380px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
}
.memory-list::-webkit-scrollbar {
  width: 4px;
}
.memory-list::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.08);
  border-radius: 4px;
}

.memory-item {
  background: #faf9f6;
  border-radius: 16px;
  padding: 14px;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
}
.memory-item:hover {
  background: #fff;
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
  border-color: rgba(127,161,107,0.15);
}
.memory-item .preview {
  width: 100%;
  height: 80px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 10px;
}
.memory-item .text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  overflow: hidden;
  -webkit-box-orient: vertical;
}
.memory-item .meta {
  font-size: 10px;
  color: var(--text-light);
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tag {
  padding: 3px 8px;
  border-radius: 8px;
  background: rgba(127,161,107,0.1);
  color: var(--accent);
  font-weight: 500;
}

/* === Modals === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(40,38,35,0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  transition: opacity 0.3s;
  backdrop-filter: blur(4px);
}
.modal-overlay.show {
  display: flex;
  opacity: 1;
}

.modal-box {
  background: var(--card);
  border-radius: 24px;
  padding: 32px;
  width: 90%;
  max-width: 440px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.15);
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.2,1,0.3,1);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-overlay.show .modal-box {
  transform: translateY(0);
}
.modal-box h3 {
  font-family: "Noto Serif SC", serif;
  font-size: 18px;
  margin-bottom: 20px;
  color: var(--earth);
}
.modal-box input,
.modal-box textarea {
  width: 100%;
  padding: 14px;
  border: 1px solid #e8e5df;
  border-radius: 14px;
  font-family: inherit;
  margin-bottom: 16px;
  background: #faf9f6;
  outline: none;
  transition: all 0.2s;
}
.modal-box input:focus,
.modal-box textarea:focus {
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(127,161,107,0.1);
  background: #fff;
}
.modal-box textarea {
  min-height: 100px;
  resize: vertical;
}

.file-area {
  border: 2px dashed #dcd8d0;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  margin-bottom: 20px;
  cursor: pointer;
  position: relative;
  background: #faf9f6;
  transition: all 0.2s;
}
.file-area:hover {
  border-color: var(--accent-light);
  background: rgba(127,161,107,0.04);
}
.file-area input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.file-preview {
  margin-top: 12px;
  max-height: 160px;
  border-radius: 12px;
  object-fit: cover;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}
.modal-actions button {
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: 0.2s;
}
.btn-cancel {
  background: #eeebe3;
  color: var(--text-light);
}
.btn-cancel:hover {
  background: #e3dfd5;
}
.btn-confirm {
  background: var(--accent);
  color: #fff;
}
.btn-confirm:hover {
  background: var(--accent-light);
}

.detail-media {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 16px;
  background: #f0ede6;
}
.detail-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  white-space: pre-wrap;
}
.detail-date {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 16px;
}

/* === Responsive === */
@media (max-width: 900px) {
  .main-layout {
    flex-direction: column;
  }
  .panel-wrapper {
    position: relative;
    top: auto;
    transform: none;
  }
  .panel-wrapper-left,
  .panel-wrapper-right {
    left: auto;
    right: auto;
  }
  .side-panel-left,
  .side-panel-right {
    transform: none !important;
    transition: none;
  }
  .panel-toggle-btn {
    display: none;
  }
  .left-panel,
  .right-panel {
    flex: auto;
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    position: static;
  }
  .stat-card,
  .action-btn {
    flex: 1;
    min-width: 100px;
  }
}