/* === 移动端响应式适配（共享 CSS） === */
/* 用法：在 demo HTML 的 加：
*/
/* 平板：≤ 1024px */
@media (max-width: 1024px) {
body {
max-width: 100% !important;
margin: 12px auto !important;
padding: 0 12px !important;
}
h1 { font-size: 20px !important; }
.subtitle { font-size: 13px !important; }
.controls { padding: 12px 14px !important; }
.row { gap: 10px !important; margin-bottom: 10px !important; }
input[type=range] { width: 160px !important; max-width: 100% !important; }
button { padding: 6px 10px !important; font-size: 12px !important; }
.display { font-size: 14px !important; padding: 10px 12px !important; }
.display b { font-size: 16px !important; }
canvas { max-width: 100% !important; height: auto !important; }
table { font-size: 12px !important; }
table th, table td { padding: 6px 8px !important; }
}
/* 手机：≤ 640px */
@media (max-width: 640px) {
body {
margin: 8px auto !important;
padding: 0 8px !important;
}
h1 { font-size: 18px !important; margin-bottom: 2px !important; }
.subtitle { font-size: 12px !important; margin-bottom: 10px !important; }
.controls { padding: 10px 12px !important; }
.row {
flex-direction: column !important;
align-items: stretch !important;
gap: 8px !important;
}
label {
display: flex !important;
align-items: center !important;
justify-content: space-between !important;
flex-wrap: wrap !important;
}
input[type=range] {
width: 100% !important;
}
button {
padding: 8px 12px !important;
font-size: 13px !important;
min-height: 36px !important; /* touch target */
}
.preset-btns, .types {
display: grid !important;
grid-template-columns: repeat(2, 1fr) !important;
gap: 6px !important;
width: 100% !important;
}
.preset-btns button, .types button {
width: 100% !important;
}
.display { font-size: 13px !important; line-height: 1.5 !important; }
.display b { font-size: 15px !important; }
.note { font-size: 12px !important; }
/* p5 canvas containers */
#p5-canvas {
padding: 8px 0 !important;
overflow-x: auto !important;
}
/* Index cards */
.grid {
grid-template-columns: 1fr !important;
}
.card a { font-size: 15px !important; }
.card .desc { font-size: 12px !important; }
/* Stats */
.stats {
flex-direction: column !important;
gap: 8px !important;
}
}
/* 触摸优化（所有触屏设备）*/
@media (hover: none) and (pointer: coarse) {
button {
min-height: 40px;
min-width: 40px;
}
input[type=range] {
height: 32px;
}
/* 增大触摸目标 */
a.lesson, a.back {
padding: 4px 8px;
display: inline-block;
}
}
/* 暗色模式（可选）*/
@media (prefers-color-scheme: dark) {
/* 暂不支持深色模式，避免破坏 demo 的颜色逻辑 */
}