/* styles.css */
:root{
  --bg: #0b0d12;
  --panel: #111520;
  --muted: #a5aec2;
  --text: #eef3ff;
  --accent1: #09c6f9;
  --accent2: #845EC2;
  --ring: rgba(132,94,194,.35);
  --radius: 16px;
  --control-bg: #151a27;
  --control-br: #2a3246;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: radial-gradient(1200px 600px at 70% -10%, rgba(9,198,249,.18), transparent 60%),
              radial-gradient(800px 400px at 10% 20%, rgba(132,94,194,.2), transparent 60%),
              var(--bg);
  color: var(--text);
  font: 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}

.container{
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 96px;
}

.hero{
  text-align: center;
  margin: 32px 0 24px;
}
.title{
  font-weight: 800;
  letter-spacing: .4px;
  font-size: clamp(28px, 6vw, 52px);
  margin: 0 0 8px;
  line-height: 1.1;
}
.title span{
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 24px rgba(9,198,249,.18);
}
.subtitle{
  margin:0;
  color: var(--muted);
  font-size: clamp(12px, 2.4vw, 16px);
}

.panel{
  margin-top: 20px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.04);
  backdrop-filter: blur(8px);
}

.controls{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 720px){
  .controls{
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
  }
}

.file-btn{
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--control-bg);
  border: 1px solid var(--control-br);
  cursor: pointer;
  text-wrap: nowrap;
  user-select: none;
  transition: transform .08s ease, box-shadow .2s ease, background .2s;
}
.file-btn:hover{ background: #1a2132; }
.file-btn:active{ transform: translateY(1px); }
.file-btn input[type="file"]{
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.filename{
  min-height: 1lh;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mode-group{ display: inline-flex; align-items: center; gap:.6rem; white-space: nowrap; }
.mode-group label{ color: var(--muted); font-size: 14px; }
select{
  appearance: none;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--control-bg);
  border: 1px solid var(--control-br);
  color: var(--text);
  outline: none;
  box-shadow: 0 0 0 0 transparent;
}
select:focus{ box-shadow: 0 0 0 6px var(--ring); }
option{ background: var(--panel); color: var(--text); }

.primary{
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: linear-gradient(90deg, rgba(9,198,249,.85), rgba(132,94,194,.85));
  color: white;
  font-weight: 600;
  letter-spacing: .3px;
  cursor: pointer;
  transition: filter .2s ease, transform .08s ease;
}
.primary:hover{ filter: brightness(1.05); }
.primary:active{ transform: translateY(1px); }

.progress-wrap{
  position: relative;
  height: 14px;
  background: var(--control-bg);
  border: 1px solid var(--control-br);
  border-radius: 999px;
  margin-top: 14px;
  overflow: hidden;
}
.progress-bar{
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  border-radius: inherit;
  transition: width .15s ease;
}
.progress-text{
  margin-top: 8px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.log{
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
  max-height: 50vh;
  overflow: auto;
  white-space: pre-wrap;
}

.site-footer{
  position: sticky;
  top: 100%;
  border-top: 1px solid rgba(255,255,255,.06);
  background: rgba(0,0,0,.25);
  backdrop-filter: blur(8px);
}
.footer-inner{
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner a {
  color: inherit;           /* 继承父元素颜色（和 span 一样） */
  text-decoration: none;    /* 去掉下划线 */
}

.footer-inner a:hover {
  text-decoration: underline; /* 悬停时显示下划线，可选 */
  color: var(--text);         /* 悬停时颜色可更亮一些 */
}