/* ============================================
   处世悬镜 PWA — 古典纸感
   ============================================ */

/* 字体栈：思源宋体优先，楷体回落，系统衬线 */
:root {
  --paper-bg: #F4E8D0;          /* 米黄纸色 */
  --paper-bg-2: #EDDDB8;        /* 深一点 */
  --ink: #1F1611;               /* 墨色 */
  --ink-soft: #4A3A2A;          /* 软墨色 */
  --ink-light: #8A7858;         /* 浅墨色 */
  --seal: #B23A2A;              /* 印泥红 */
  --line: #B89F6E;              /* 装饰线 */
  --shadow: rgba(80, 50, 20, 0.15);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

html, body {
  height: 100%;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

body {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN",
               "Songti SC", "STSong", "SimSun", "宋体", serif;
  background: var(--paper-bg);
  color: var(--ink);
  /* 仿纸纹：用两层径向渐变模拟宣纸 */
  background-image:
    radial-gradient(ellipse at 20% 30%, rgba(184, 159, 110, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(184, 159, 110, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(255, 240, 200, 0.4) 0%, transparent 70%);
  /* 噪点纹理 - 极淡 */
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 2px, rgba(120, 90, 50, 0.015) 2px, rgba(120, 90, 50, 0.015) 3px),
    repeating-linear-gradient(90deg, transparent 0, transparent 2px, rgba(120, 90, 50, 0.015) 2px, rgba(120, 90, 50, 0.015) 3px);
  z-index: 0;
}

/* ============================================
   主内容卡片
   ============================================ */
#card {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  cursor: pointer;
  outline: none;
  /* 留出顶部工具条空间 */
  padding-top: calc(env(safe-area-inset-top) + 60px);
  padding-bottom: calc(env(safe-area-inset-bottom) + 60px);
}

#card:active .paper {
  transform: scale(0.99);
  transition: transform 0.1s ease;
}

.paper {
  width: 100%;
  max-width: 640px;
  min-height: 70vh;
  background: var(--paper-bg-2);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 40px 32px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  box-shadow:
    0 2px 8px var(--shadow),
    inset 0 0 40px rgba(184, 159, 110, 0.15);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* 切换时的淡入动画 */
.paper.fading {
  opacity: 0;
  transform: translateY(8px);
}

/* 顶部装饰线 */
.paper::before {
  content: '';
  position: absolute;
  top: 16px; left: 16px; right: 16px; bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 2px;
  pointer-events: none;
  opacity: 0.5;
}

/* ============================================
   印章
   ============================================ */
.seal {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--seal);
  color: var(--paper-bg);
  font-size: 24px;
  font-weight: 700;
  font-family: "STKaiti", "KaiTi", "楷体", serif;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  box-shadow:
    inset 0 0 0 2px var(--paper-bg-2),
    0 1px 3px var(--shadow);
  transform: rotate(-3deg);
  /* 印泥不规则边缘 */
  filter: contrast(1.1);
  z-index: 2;
}

.seal::after {
  content: '';
  position: absolute;
  inset: -2px;
  background-image: radial-gradient(circle at 30% 30%, transparent 0%, transparent 90%, rgba(0, 0, 0, 0.15) 100%);
  pointer-events: none;
}

/* ============================================
   引文主体
   ============================================ */
.quote {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-align: center;
  padding: 32px 0 24px;
}

.quote-text {
  font-size: clamp(22px, 5.5vw, 32px);
  line-height: 1.9;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
  max-width: 100%;
  /* 段首不缩进 */
  text-indent: 0;
}

.attribution {
  margin-top: 20px;
  font-size: clamp(13px, 3.2vw, 15px);
  color: var(--ink-light);
  letter-spacing: 0.1em;
  font-style: normal;
}

/* ============================================
   解读
   ============================================ */
.interp {
  width: 100%;
  text-align: center;
  font-size: clamp(13px, 3.2vw, 15px);
  line-height: 1.9;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
  padding: 16px 8px;
  border-top: 1px dashed var(--line);
  margin-top: 16px;
  font-weight: 400;
}

.interp[hidden] { display: none; }

/* ============================================
   底部提示
   ============================================ */
.hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  width: 100%;
}

.hint-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line), transparent);
  max-width: 60px;
}

.hint-text {
  font-size: 11px;
  color: var(--ink-light);
  letter-spacing: 0.2em;
  white-space: nowrap;
  opacity: 0.7;
}

/* ============================================
   顶部工具条
   ============================================ */
.toolbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(env(safe-area-inset-top) + 8px) 16px 8px;
  pointer-events: none;
}

.tool-btn {
  pointer-events: auto;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: var(--paper-bg-2);
  color: var(--ink-soft);
  font-size: 13px;
  font-family: inherit;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-btn:active {
  background: var(--line);
  color: var(--paper-bg-2);
}

.counter {
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.1em;
  background: rgba(244, 232, 208, 0.6);
  padding: 4px 12px;
  border-radius: 12px;
  pointer-events: auto;
}

/* ============================================
   关于弹窗
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(31, 22, 17, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal[hidden] { display: none; }

.modal-card {
  background: var(--paper-bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px 28px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 4px 20px var(--shadow);
}

.modal-card h2 {
  font-size: 24px;
  margin-bottom: 4px;
  letter-spacing: 0.2em;
  color: var(--ink);
}

.modal-author {
  font-size: 13px;
  color: var(--ink-light);
  margin-bottom: 20px;
  letter-spacing: 0.1em;
}

.modal-desc {
  font-size: 14px;
  line-height: 2;
  color: var(--ink-soft);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.modal-source {
  font-size: 11px;
  color: var(--ink-light);
  line-height: 1.8;
  margin-bottom: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  letter-spacing: 0.05em;
}

.btn-close {
  padding: 8px 24px;
  background: var(--ink);
  color: var(--paper-bg);
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.2em;
  transition: opacity 0.2s;
}

.btn-close:active { opacity: 0.7; }

/* ============================================
   Toast
   ============================================ */
.toast {
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom) + 100px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper-bg);
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  letter-spacing: 0.2em;
  z-index: 200;
  animation: toastIn 0.3s ease;
  pointer-events: none;
}

.toast[hidden] { display: none; }

@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 380px) {
  .paper { padding: 32px 20px 24px; }
  .quote-text { font-size: 20px; }
  .seal { width: 40px; height: 40px; font-size: 20px; top: 18px; right: 18px; }
}

@media (min-width: 768px) {
  .quote-text { font-size: 30px; }
  .paper { padding: 56px 48px 40px; }
}

/* 横屏适配 */
@media (orientation: landscape) and (max-height: 500px) {
  .paper { min-height: auto; padding: 32px 32px 20px; }
  .quote { padding: 16px 0; }
  .quote-text { font-size: 20px; line-height: 1.7; }
  .interp { font-size: 13px; }
}