/* ==========================================================================
   名言卡片、毛笔书法排版与交互控件样式 (Card Component & Classical Typography)
   ========================================================================== */

/* 核心卡片容器 (Main Quote Card) */
.card-wrapper {
  position: relative;
  width: 100%;
  max-width: var(--card-max-width);
  margin: 0 auto;
}

.quote-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-paper);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 3rem 3.25rem 2.5rem;
  overflow: hidden;
  transition: box-shadow 0.4s ease, transform 0.4s ease;
  user-select: text;
}

.quote-card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* 古籍内线与典雅四角纹饰 (Antique Double Border & Corner Accents) */
.card-border-inner {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 12px;
  right: 12px;
  border: 1px solid var(--border-inner);
  border-radius: calc(var(--radius-card) - 4px);
  pointer-events: none;
}

.corner-ornament {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--ink-faint);
  pointer-events: none;
}

.corner-tl { top: 18px; left: 18px; border-right: none; border-bottom: none; }
.corner-tr { top: 18px; right: 18px; border-left: none; border-bottom: none; }
.corner-bl { bottom: 18px; left: 18px; border-right: none; border-top: none; }
.corner-br { bottom: 18px; right: 18px; border-left: none; border-top: none; }

/* 卡片顶部标签与卷别 (Card Header Metadata) */
.card-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.theme-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  background-color: var(--bg-card-subtle);
  color: var(--ink-secondary);
  border: 1px solid var(--border-paper);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.quote-counter {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--ink-muted);
  letter-spacing: 0.12em;
}

/* 毛笔书法名言正文 (Calligraphy Quote Text) */
.quote-body {
  margin: 1.5rem 0 2rem;
  text-align: center;
  position: relative;
}

.quote-text {
  font-family: var(--font-brush);
  font-size: 2.25rem;
  line-height: 1.65;
  color: var(--ink-heavy);
  letter-spacing: 0.08em;
  text-shadow: 0 1px 2px rgba(44, 34, 24, 0.05);
  word-break: break-word;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* 出处与作者落款印章 (Citation & Seal) */
.quote-author-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.quote-source {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: normal;
  color: var(--ink-secondary);
  letter-spacing: 0.06em;
}

.seal-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--cinnabar);
  color: #FFFDF8;
  font-family: var(--font-brush);
  font-size: 0.85rem;
  border-radius: 3px;
  box-shadow: var(--shadow-seal);
  user-select: none;
}

/* 励志寄语折叠容器与触发器 (Collapsible Inspiration Section) */
.inspiration-section {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.inspiration-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: 1px solid var(--border-paper);
  background-color: var(--bg-card-subtle);
  color: var(--ink-muted);
  font-family: var(--font-serif);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  padding: 0.3rem 0.85rem;
  border-radius: 16px;
  transition: all 0.25s ease;
  user-select: none;
  outline: none;
}

.inspiration-toggle:hover {
  color: var(--ink-heavy);
  border-color: var(--ink-muted);
  background-color: #FFFDF8;
}

.inspiration-toggle:focus-visible {
  box-shadow: 0 0 0 2px var(--border-paper);
}

.toggle-arrow {
  display: inline-block;
  font-size: 0.72rem;
  transition: transform 0.25s ease;
}

.inspiration-toggle.expanded .toggle-arrow {
  transform: rotate(180deg);
}

/* 白话励志启迪注解区 (Modern Inspiration Box) */
.inspiration-box {
  width: 100%;
  margin-top: 0.85rem;
  padding: 1.15rem 1.4rem;
  background-color: rgba(44, 34, 24, 0.025);
  border-left: 2px solid var(--ink-muted);
  border-radius: 0 6px 6px 0;
  text-align: left;
  overflow: hidden;
  box-sizing: border-box;
  transition: max-height 0.3s cubic-bezier(0.25, 1, 0.5, 1),
              opacity 0.25s ease,
              padding 0.3s ease,
              margin 0.3s ease;
}

.inspiration-box.collapsed {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
  border-left-color: transparent;
  pointer-events: none;
}

.inspiration-box.expanded {
  max-height: 300px;
  opacity: 1;
  pointer-events: auto;
}

.inspiration-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-secondary);
  margin-bottom: 0.35rem;
  letter-spacing: 0.05em;
}

.inspiration-text {
  font-family: var(--font-serif);
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--ink-secondary);
}

/* 导航切换箭头 (Floating Nav Arrows) */
.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-paper);
  color: var(--ink-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(44, 34, 24, 0.08);
  transition: all 0.25s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 10;
  outline: none;
}

.nav-btn:hover {
  background-color: #FFFDF8;
  color: var(--cinnabar);
  border-color: var(--cinnabar-border);
  box-shadow: 0 6px 20px rgba(154, 46, 46, 0.15);
  transform: translateY(-50%) scale(1.08);
}

.nav-btn:active {
  transform: translateY(-50%) scale(0.95);
}

.nav-btn:focus-visible {
  box-shadow: 0 0 0 3px var(--cinnabar-border);
}

.nav-prev { left: -24px; }
.nav-next { right: -24px; }

.nav-icon {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* 底部操作工具栏 (Action Controls Bar) */
.card-actions-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-btn);
  font-family: var(--font-serif);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  outline: none;
  transition: all 0.25s ease;
  user-select: none;
}

.action-btn-primary {
  background-color: var(--cinnabar);
  color: #FFFDF8;
  border: 1px solid var(--cinnabar-light);
  box-shadow: 0 4px 14px rgba(154, 46, 46, 0.22);
}

.action-btn-primary:hover {
  background-color: var(--cinnabar-light);
  box-shadow: 0 6px 18px rgba(154, 46, 46, 0.32);
  transform: translateY(-2px);
}

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

.action-btn-secondary {
  background-color: var(--bg-card);
  color: var(--ink-secondary);
  border: 1px solid var(--border-paper);
  box-shadow: 0 2px 8px rgba(44, 34, 24, 0.05);
}

.action-btn-secondary:hover {
  background-color: #FFFDF8;
  color: var(--ink-heavy);
  border-color: var(--ink-muted);
  box-shadow: 0 4px 12px rgba(44, 34, 24, 0.1);
  transform: translateY(-2px);
}

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

.action-icon {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

/* 快捷键提示条 (Keyboard Shortcut Hints) */
.shortcuts-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 1.25rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.kbd-badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-paper);
  border-radius: 4px;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--ink-secondary);
  box-shadow: 0 1px 2px rgba(44, 34, 24, 0.05);
}

/* 静雅温和的 Toast 提示 (Tranquil Toast Notification) */
.toast-container {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background-color: var(--ink-heavy);
  color: #FFFDF8;
  padding: 0.75rem 1.6rem;
  border-radius: 30px;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 1000;
  pointer-events: none;
}

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

.toast-icon {
  width: 18px;
  height: 18px;
  fill: #82C99B; /* 柔和竹绿勾号 */
}

/* 响应式断点适配 (Responsive Breakpoints 320px ~ 4K) */
@media (max-width: 820px) {
  .nav-btn {
    position: static;
    transform: none;
  }
  
  .nav-btn:hover {
    transform: scale(1.06);
  }

  .nav-btn:active {
    transform: scale(0.95);
  }

  .mobile-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.5rem;
    gap: 1rem;
  }

  .desktop-only-nav {
    display: none;
  }
}

@media (min-width: 821px) {
  .mobile-nav-bar {
    display: none;
  }
}

@media (max-width: 640px) {
  .quote-card {
    padding: 2.25rem 1.5rem 2rem;
  }

  .quote-text {
    font-size: 1.75rem;
    line-height: 1.6;
  }

  .site-title {
    font-size: 1.4rem;
  }

  .header-seal {
    font-size: 1.4rem;
    padding: 0.2rem 0.55rem;
  }

  .card-actions-bar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .action-btn {
    padding: 0.6rem 1.1rem;
    font-size: 0.88rem;
  }

  .shortcuts-hint {
    display: none; /* 移动端隐藏键盘提示 */
  }
}