/* ===== 主题相关样式 ===== */

/* 主题切换过渡 */
body, .paper-card, .sidebar, input, textarea {
  transition: background-color var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
}

/* 手帐装饰元素 */
.washi-tape {
  position: relative;
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  opacity: 0.85;
  transform: rotate(-1deg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  border-radius: 2px;
}

.washi-tape::before,
.washi-tape::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 8px;
  background: inherit;
  opacity: 0.5;
}

.washi-tape::before {
  left: -4px;
  transform: skewY(-3deg);
}

.washi-tape::after {
  right: -4px;
  transform: skewY(3deg);
}

/* 便签效果 */
.sticky-note {
  background: var(--color-warning-light);
  border: none;
  box-shadow: var(--shadow-md);
  transform: rotate(-0.5deg);
  position: relative;
}

.sticky-note::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 16px;
  background: rgba(0,0,0,0.1);
  border-radius: 2px;
}

/* 翻页效果 */
.page-flip {
  position: relative;
  overflow: hidden;
}

.page-flip::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, transparent 50%, var(--color-border) 50%);
  border-radius: 0 0 0 var(--radius-md);
  opacity: 0.3;
}

/* 回形针装饰 */
.paper-clip {
  position: relative;
}

.paper-clip::before {
  content: '📎';
  position: absolute;
  top: -10px;
  right: 10px;
  font-size: 20px;
  transform: rotate(-15deg);
  opacity: 0.5;
}

/* 印章效果 */
.stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs) var(--space-md);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 12px;
  transform: rotate(-3deg);
  opacity: 0.8;
}

/* 胶带分割线 */
.tape-divider {
  height: 20px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent),
    var(--color-accent) 20px,
    transparent 20px,
    transparent 25px
  );
  opacity: 0.3;
  margin: var(--space-lg) 0;
}

/* 手绘边框 */
.hand-drawn-border {
  border: 2px solid var(--color-border);
  border-radius: 255px 15px 225px 15px / 15px 225px 15px 255px;
}

/* 墨水效果 */
.ink-text {
  color: var(--color-text);
  text-shadow: 0.5px 0.5px 0px rgba(0,0,0,0.1);
}

/* 高亮标记 */
.highlight {
  background: linear-gradient(180deg, transparent 60%, var(--color-warning) 60%);
  padding: 0 2px;
}

/* 撕纸效果 */
.torn-edge {
  position: relative;
}

.torn-edge::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  right: 0;
  height: 10px;
  background: linear-gradient(
    45deg,
    transparent 33.333%,
    var(--color-surface) 33.333%,
    var(--color-surface) 66.667%,
    transparent 66.667%
  );
  background-size: 20px 20px;
}

/* 响应式字体大小调整 */
@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }

  .handwritten-title {
    letter-spacing: 1px;
  }
}

/* 打印样式 */
@media print {
  .sidebar,
  .btn-icon,
  .modal-overlay,
  .toast-container {
    display: none !important;
  }

  .content {
    padding: 0;
    background: white;
  }

  .paper-card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}