/* ========== 全局变量与重置 ========== */
:root {
  --paper-color: #f4e8d1;
  --ink-red: #9c1a1a;
}

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

/* 页面基础样式 */
body,
html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--paper-color);
  background-image: url("https://www.transparenttextures.com/patterns/natural-paper.png");
  font-family: "Ma Shan Zheng", cursive;
}

/* ========== 视图切换动画 ========== */
.view {
  position: absolute;
  width: 100%;
  height: 100%;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.view.hidden {
  opacity: 0;
  transform: scale(1.05);
  pointer-events: none;
}
.view.active {
  opacity: 1;
  transform: scale(1);
}

/* ========== 首页布局 ========== */
.main-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  pointer-events: none;
}

/* ========== 书法容器与文字 ========== */
.calligraphy-box {
  position: relative;
  width: 320px;
  height: 500px;
  transform: translateY(-20px);
  pointer-events: none;
}

/* 激活视图层级 */
.view.active {
  opacity: 1;
  transform: scale(1);
  z-index: 50;
}

/* 交互元素启用点击 */
.wish-button,
.back-btn,
.write-btn,
.modal {
  pointer-events: auto !important;
}

/* ========== 书法文字样式 ========== */
.char {
  position: absolute;
  font-size: clamp(7.5rem, 21vw, 10.5rem);
  color: var(--ink-red);
  line-height: 1;
  text-shadow:
    2px 2px 0px rgba(0, 0, 0, 0.03),
    0 0 15px rgba(178, 34, 34, 0.1);
}
.char-xin {
  top: -20px;
  right: 20px;
  z-index: 4;
}
.char-chun {
  top: 120px;
  right: 0px;
  z-index: 2;
}
.char-kuai {
  top: 180px;
  left: 40px;
  z-index: 3;
}
.char-le {
  bottom: 0;
  left: 60%;
  transform: translateX(-50%);
  z-index: 1;
}

/* ========== 印章样式 ========== */
.seal-container {
  position: absolute;
  left: -15px;
  top: 245px;
  width: 45px;
  height: 90px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 6;
  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.1));
}
.seal-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  fill: var(--ink-red);
  filter: url(#roughness);
}
.seal-text {
  position: relative;
  color: var(--paper-color);
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 0.85rem;
  letter-spacing: 2px;
  line-height: 1.1;
  padding-top: 2px;
}

/* ========== 按钮样式 ========== */
.wish-button {
  position: absolute;
  bottom: 18%;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 32px;
  font-family: "Ma Shan Zheng", cursive;
  font-size: 1.4rem;
  color: var(--paper-color);
  background: linear-gradient(135deg, #b22222 0%, #a01010 100%);
  border: 4px solid #8b0000;
  cursor: pointer;
  z-index: 100;
  letter-spacing: 6px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  clip-path: polygon(
    0 8px,
    8px 0,
    calc(100% - 8px) 0,
    100% 8px,
    100% calc(100% - 8px),
    calc(100% - 8px) 100%,
    8px 100%,
    0 calc(100% - 8px)
  );
  pointer-events: auto;
}

.wish-button:hover {
  transform: translateX(-50%) scale(1.05);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
}

/* ========== 许愿墙样式 ========== */
.wall-header {
  width: 90%;
  margin-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 20;
}
.wall-title {
  font-size: 2.5rem;
  color: var(--ink-red);
}
.back-btn {
  background: none;
  border: 1px solid var(--ink-red);
  color: var(--ink-red);
  padding: 5px 15px;
  cursor: pointer;
  font-family: "Ma Shan Zheng";
  transition: all 0.3s ease;
  pointer-events: auto;
}

.back-btn:hover {
  background: var(--ink-red);
  color: var(--paper-color);
}

#message-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 15px;
  width: 90%;
  height: 60vh;
  overflow-y: auto;
  margin-top: 20px;
  padding: 10px;
  z-index: 20;
}
.message-card {
  background: #d32f2f;
  color: var(--paper-color);
  aspect-ratio: 1/1;
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: 3px 3px 8px rgba(0, 0, 0, 0.2);
  font-size: 1rem;
  background-image: url("https://www.transparenttextures.com/patterns/asfalt-dark.png");
}
.write-btn {
  margin-top: 20px;
  padding: 10px 30px;
  background: var(--ink-red);
  color: white;
  border: none;
  font-family: "Ma Shan Zheng";
  cursor: pointer;
  z-index: 20;
  transition: all 0.3s ease;
  pointer-events: auto;
}

.write-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* ========== 模态弹窗样式 ========== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}
.modal-content {
  background: var(--paper-color);
  padding: 25px;
  width: 85%;
  max-width: 350px;
  border: 2px solid var(--ink-red);
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.modal-content textarea,
.modal-content input {
  padding: 8px;
  border: 1px solid #ccc;
  font-family: "Ma Shan Zheng";
  font-size: 1.1rem;
}
.anon-label {
  font-family: "Ma Shan Zheng";
  color: var(--ink-red);
  font-size: 1rem;
}
.modal-btns button {
  padding: 8px 20px;
  font-family: "Ma Shan Zheng";
  cursor: pointer;
  border: none;
}
.modal-btns button:first-child {
  background: var(--ink-red);
  color: white;
}

/* ========== 其他元素 ========== */
.hint {
  position: absolute;
  bottom: 12%;
  width: 100%;
  text-align: center;
  color: #8e8e93;
  font-size: 0.85rem;
  letter-spacing: 3px;
  animation: blink 2s infinite;
  z-index: 15;
  font-family: sans-serif;
}
#firework-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  mix-blend-mode: darken;
}
.visitor-counter {
  position: fixed;
  bottom: 35px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  font-family: sans-serif;
  color: #8e8e93;
  font-size: 0.75rem;
  white-space: nowrap;
}
.author-info {
  position: fixed;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  color: #8e8e93;
  font-size: 0.7rem;
  font-family: "Times New Roman", serif;
}

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

/* ========== 移动端响应式适配 ========== */
@media (max-width: 768px) {
  /* 首页书法布局调整 */
  .calligraphy-box {
    width: 220px;
    height: 380px;
    margin: 0 auto;
    transform: translateY(-80px) scale(1);
    position: relative;
    display: block;
  }

  .char {
    font-size: 6.5rem !important;
    line-height: 1;
    filter: drop-shadow(0 0 10px rgba(178, 34, 34, 0.15));
  }

  .char-xin {
    top: 0;
    right: 25px;
    z-index: 4;
  }

  .char-chun {
    top: 85px;
    right: 5px;
    z-index: 2;
  }

  .char-kuai {
    top: 155px;
    left: 25px;
    z-index: 3;
  }

  .char-le {
    top: 245px;
    left: 50%;
    transform: translateX(-40%);
    z-index: 1;
  }

  /* 印章修复：强制红色背景与居中 */
  .seal-container {
    width: 35px;
    height: 75px;
    left: -20px;
    top: 200px;
    z-index: 10;
    display: flex !important;
    justify-content: center;
    align-items: center;
  }

  .seal-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    fill: #9c1a1a !important;
    display: block !important;
    filter: none !important;
    filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.2)) !important;
  }

  .seal-text {
    position: relative;
    z-index: 11;
    color: var(--paper-color) !important;
    font-size: 0.75rem;
    line-height: 1.1;
    text-align: center;
    writing-mode: vertical-rl;
    text-orientation: upright;
    padding-top: 0;
    margin: 0;
  }

  /* 许愿墙卡片防重叠 */
  #view-wall {
    padding-bottom: 120px;
    overflow-y: auto;
  }

  #message-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 15px !important;
    width: 94% !important;
    height: auto !important;
    max-height: 60vh !important;
    padding: 20px 10px !important;
    margin: 10px auto !important;
    align-items: start;
  }

  .message-card {
    aspect-ratio: auto !important;
    min-height: 140px;
    height: auto !important;
    padding: 15px 10px !important;
    position: relative !important;
    margin: 0 !important;
    font-size: 1rem;
    box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-sizing: border-box;
    transform: rotate(0deg) !important;
  }

  /* 底部元素位置调整 */
  .wish-button {
    bottom: 24%;
    padding: 8px 30px;
    font-size: 1.3rem;
  }

  .write-btn {
    margin: 25px 0;
    padding: 12px 45px;
    position: relative;
    z-index: 100;
  }

  .visitor-counter {
    bottom: 40px;
    background: rgba(244, 232, 209, 0.9);
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
  }

  .author-info {
    bottom: 15px;
    font-size: 0.65rem;
  }

  .hint {
    bottom: 18%;
    font-size: 0.8rem;
  }
}

/* ========== 极小屏幕适配 ========== */
@media (max-width: 360px) {
  .char {
    font-size: 5.5rem !important;
  }
  .calligraphy-box {
    transform: translateY(-60px) scale(0.9);
  }
  .char-chun {
    top: 75px;
  }
  .char-kuai {
    top: 135px;
  }
  .char-le {
    top: 215px;
  }
  #message-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 10px !important;
  }
}