/* ===== 粒子宇宙 ===== */
:root {
  --glass: rgba(16, 18, 28, .55);
  --line: rgba(255, 255, 255, .14);
  --ink: #eef2ff;
  --ink-dim: rgba(238, 242, 255, .55);
  --accent: #7df9ff;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: #04050a;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
}

#cosmos {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

/* 冲击波闪光 */
#flash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(38% 38% at var(--fx, 50%) var(--fy, 50%), rgba(255,255,255,.28), transparent 70%);
  opacity: 0;
}
#flash.on { animation: flash .45s ease-out; }
@keyframes flash { 12% { opacity: 1; } 100% { opacity: 0; } }

/* ===== UI 通用:闲置渐隐 ===== */
.ui { transition: opacity .8s ease; z-index: 10; }
body.idle .ui { opacity: 0; pointer-events: none; }

/* ===== 顶部 ===== */
#topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: max(16px, env(safe-area-inset-top)) 22px 10px;
}
.brand { display: flex; flex-direction: column; line-height: 1.25; user-select: none; }
.brand-cn {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .42em;
  text-shadow: 0 0 18px rgba(125, 249, 255, .6);
}
.brand-en { font-size: 10px; letter-spacing: .34em; color: var(--ink-dim); }
.top-right { display: flex; align-items: center; gap: 10px; }
.stat {
  font-size: 11px;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
}
.icon-btn {
  width: 34px; height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--ink);
  font-size: 15px;
  cursor: pointer;
  transition: border-color .2s, transform .1s;
}
.icon-btn:hover { border-color: var(--accent); }
.icon-btn:active { transform: scale(.92); }
.icon-btn.off { color: rgba(238,242,255,.3); text-decoration: line-through; }

/* ===== 提示 ===== */
#hint {
  position: fixed;
  top: 18%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 13px;
  letter-spacing: .3em;
  color: var(--ink-dim);
  white-space: nowrap;
  text-shadow: 0 2px 12px rgba(0,0,0,.8);
  animation: hint-breathe 3.2s ease-in-out infinite;
}
#hint.gone { opacity: 0 !important; transition: opacity 1.2s; }
@keyframes hint-breathe { 50% { opacity: .45; } }

/* ===== 底部控制台 ===== */
#dock {
  position: fixed;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 14px 50px rgba(0, 0, 0, .45);
  max-width: min(92vw, 720px);
}
.modes { display: flex; gap: 6px; }
.mode-btn {
  padding: 8px 14px;
  border-radius: 11px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-dim);
  font-size: 13px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: all .18s;
  white-space: nowrap;
}
.mode-btn:hover { color: var(--ink); }
.mode-btn.active {
  color: #061018;
  background: linear-gradient(135deg, #9ffcff, var(--accent) 60%, #57c8ff);
  box-shadow: 0 0 18px rgba(125, 249, 255, .45);
  font-weight: 700;
}

.type-wrap { display: flex; gap: 8px; flex: 1; min-width: 0; }
#text-input {
  flex: 1;
  min-width: 0;
  width: 190px;
  padding: 9px 14px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .06);
  color: var(--ink);
  font-size: 14px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
#text-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(125, 249, 255, .15);
}
#text-input::placeholder { color: rgba(238,242,255,.35); }
#btn-ignite {
  padding: 9px 18px;
  border-radius: 11px;
  border: none;
  background: linear-gradient(135deg, #ffe29a, #ffb347 55%, #ff7847);
  color: #2a1404;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .15em;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(255, 179, 71, .4);
  transition: transform .1s, filter .2s;
  white-space: nowrap;
}
#btn-ignite:hover { filter: brightness(1.08); }
#btn-ignite:active { transform: scale(.94); }

.side { display: flex; align-items: center; gap: 12px; }
.palettes { display: flex; gap: 7px; }
.pal-dot {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s, border-color .15s;
}
.pal-dot:hover { transform: scale(1.2); }
.pal-dot.active { border-color: #fff; transform: scale(1.15); }
.shot-btn {
  padding: 8px 14px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.06);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .2s;
  white-space: nowrap;
}
.shot-btn:hover { border-color: var(--accent); }

/* ===== 截图弹层 ===== */
#shot-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(2, 3, 8, .86);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
}
#shot-modal.hidden { display: none; }
.shot-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  max-width: min(560px, 92vw);
}
#shot-img {
  max-width: 100%;
  max-height: 62vh;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 24px 90px rgba(0, 0, 0, .7);
}
.shot-hint { font-size: 12px; color: var(--ink-dim); letter-spacing: .1em; }
.shot-actions { display: flex; gap: 10px; }
#shot-download {
  padding: 10px 22px;
  border-radius: 11px;
  background: linear-gradient(135deg, #9ffcff, #57c8ff);
  color: #061018;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}
#shot-close {
  padding: 10px 22px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}

/* ===== 移动端 ===== */
@media (max-width: 640px) {
  #dock {
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    width: 92vw;
  }
  .type-wrap { order: -1; width: 100%; flex-basis: 100%; }
  .brand-cn { font-size: 16px; }
  #hint { font-size: 11px; letter-spacing: .2em; }
  .stat { display: none; }
}