/* 满居工具箱 - 参考图风格: 淡蓝紫背景 / 白卡片 / 红色主色 / 深蓝导航 */
:root {
  --bg: #eef1fb;
  --card: #ffffff;
  --ink: #1f2329;
  --sub: #6b7280;
  --accent: #e5484d;
  --accent-dark: #d63c41;
  --chip: #fce8e8;
  --navy: #1e6fd9;
  --line: #e5e7eb;
  --ok: #16a34a;
  --radius: 16px;
  --shadow: 0 4px 16px rgba(31, 35, 41, .07);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部导航 ---------- */
#topnav {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 8px rgba(30, 111, 217, .25);
}
.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  color: #fff;
  font-size: 19px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 1px;
}
.nav-links { display: flex; gap: 6px; }
.nav-links a {
  color: rgba(255, 255, 255, .88);
  text-decoration: none;
  font-size: 15px;
  padding: 7px 16px;
  border-radius: 8px;
  transition: background .15s;
}
.nav-links a:hover { background: rgba(255, 255, 255, .14); color: #fff; }
.nav-links a.active { background: rgba(255, 255, 255, .2); color: #fff; font-weight: 600; }

#view { flex: 1; width: 100%; }

/* ---------- 首页: Bento 卡片网格 ---------- */
.home {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 20px 60px;
}
.home .hero { margin-bottom: 26px; }
.home .hero h1 { font-size: 26px; margin-bottom: 8px; }
.home .hero p { color: var(--sub); font-size: 15px; }

.grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .15s, border-color .15s, box-shadow .15s;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 128px;
}
.card:hover {
  transform: translateY(-3px);
  border-color: #f3c1c3;
  box-shadow: 0 10px 24px rgba(229, 72, 77, .12);
}
.card .chip {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--chip);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.card h3 { font-size: 17px; display: flex; align-items: center; gap: 6px; }
.card p { color: var(--sub); font-size: 13px; line-height: 1.6; }
.card.w2 { grid-column: span 4; flex-direction: row; align-items: center; gap: 16px; }
.card.w2 .chip { width: 64px; height: 64px; font-size: 34px; border-radius: 16px; }
.card.w2 h3 { font-size: 20px; }
.card.w2 p { font-size: 14px; }
.card.w1 { grid-column: span 2; }
.card.w1.row { flex-direction: row; align-items: center; gap: 12px; }
.hot {
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 6px;
  font-weight: 600;
}
.card.disabled { opacity: .45; cursor: not-allowed; }
.card.disabled:hover { transform: none; border-color: transparent; box-shadow: var(--shadow); }
.section-title {
  grid-column: span 6;
  font-size: 16px;
  font-weight: 700;
  margin: 14px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-title::before {
  content: "";
  width: 4px; height: 18px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
}

/* ---------- 工具页 ---------- */
.toolpage {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.sidebar {
  width: 218px;
  flex-shrink: 0;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 10px;
  position: sticky;
  top: 76px;
}
.sidebar .grp { margin-bottom: 14px; }
.sidebar .grp h4 {
  font-size: 13px;
  color: var(--sub);
  padding: 4px 12px 8px;
  font-weight: 600;
}
.sidebar a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 9px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  transition: background .12s;
}
.sidebar a:hover { background: #f2f4f9; }
.sidebar a.active { background: var(--chip); color: var(--accent); font-weight: 600; }
.sidebar .mini-hot {
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  border-radius: 4px;
  padding: 1px 4px;
}

.workbench {
  flex: 1;
  min-width: 0;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 34px 34px;
}
.workbench h2 {
  font-size: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.workbench h2 .chip { width: 42px; height: 42px; font-size: 22px; border-radius: 11px;
  background: var(--chip); display: inline-flex; align-items: center; justify-content: center; }
.workbench > p.desc { color: var(--sub); margin-bottom: 22px; padding-left: 52px; }

.dropzone {
  border: 2px dashed #c9d2e8;
  border-radius: 14px;
  background: #f8faff;
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: #fdf3f3;
}
.dropzone .big { font-size: 17px; margin-bottom: 8px; }
.dropzone .big b { color: var(--accent); }
.dropzone .hint { color: var(--sub); font-size: 13px; }
.dropzone .cloud { font-size: 40px; margin-bottom: 10px; }

.filelist { list-style: none; margin-top: 14px; }
.filelist li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 8px;
  font-size: 14px;
  background: #fff;
}
.filelist .fname { flex: 1; min-width: 0; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; }
.filelist .fsize { color: var(--sub); font-size: 12px; flex-shrink: 0; }
.filelist button {
  border: none; background: none; cursor: pointer;
  color: var(--sub); font-size: 15px; padding: 2px 6px; border-radius: 6px;
}
.filelist button:hover { background: #fdecec; color: var(--accent); }
.filelist .order { display: flex; gap: 2px; }

.settings { margin-top: 20px; }
.settings .row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f1f5;
  flex-wrap: wrap;
}
.settings .row:last-child { border-bottom: none; }
.settings label { font-size: 14px; color: var(--ink); min-width: 92px; }
.settings select, .settings input[type=text] {
  border: 1px solid #d4d9e3;
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  outline: none;
}
.settings select:focus, .settings input[type=text]:focus { border-color: var(--navy); }
.settings .sub-hint { color: var(--sub); font-size: 12px; }
.settings input[type=range] { accent-color: var(--accent); width: 180px; }
.settings .qv { min-width: 30px; display: inline-block; font-weight: 600; color: var(--accent); }
.radio-group { display: flex; gap: 8px; flex-wrap: wrap; }
.radio-group label {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid #d4d9e3; border-radius: 8px;
  padding: 7px 12px; cursor: pointer; font-size: 14px;
  min-width: auto;
  background: #fff;
}
.radio-group label.on { border-color: var(--accent); background: #fdf3f3; color: var(--accent); }
.radio-group input { display: none; }

.btn-convert {
  margin-top: 24px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 17px;
  font-weight: 600;
  padding: 13px 44px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(229, 72, 77, .3);
  transition: background .15s, transform .1s;
}
.btn-convert:hover { background: var(--accent-dark); }
.btn-convert:active { transform: scale(.98); }
.btn-convert:disabled { background: #c4c7cf; box-shadow: none; cursor: not-allowed; }

/* ---------- 结果区 ---------- */
.result { margin-top: 26px; }
.result .panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
}
.result .panel.err { border-color: #f5c2c4; background: #fdf3f3; }
.result .msg { font-size: 15px; margin-bottom: 14px; display: flex; gap: 8px; align-items: center; }
.result .msg .ok-ico { color: var(--ok); }
.result .panel.err .msg { color: var(--accent); }
.outfiles { list-style: none; }
.outfiles li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.outfiles li:last-child { border-bottom: none; }
.outfiles .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.outfiles .size { color: var(--sub); font-size: 12px; }
.outfiles a.dl, .btn-zip, .btn-again {
  border: 1px solid var(--navy);
  color: var(--navy);
  text-decoration: none;
  font-size: 13px;
  border-radius: 8px;
  padding: 6px 14px;
  background: #fff;
  cursor: pointer;
  flex-shrink: 0;
}
.outfiles a.dl:hover, .btn-zip:hover, .btn-again:hover { background: #eaf2fd; }
.result-actions { display: flex; gap: 10px; margin-top: 14px; }
.btn-again { border-color: var(--sub); color: var(--sub); }

.spinner {
  width: 18px; height: 18px;
  border: 3px solid #f3c1c3;
  border-top-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.busy-tip { color: var(--sub); font-size: 14px; display: flex; align-items: center; gap: 10px; }

/* ---------- toast / footer ---------- */
#toast {
  position: fixed;
  top: 74px; left: 50%;
  transform: translateX(-50%);
  background: rgba(31, 35, 41, .92);
  color: #fff;
  padding: 10px 22px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 99;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
  max-width: 90vw;
}
footer {
  text-align: center;
  padding: 26px 16px 34px;
  color: var(--sub);
  font-size: 13px;
  line-height: 1.9;
}
footer .dim { opacity: .7; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .card.w2 { grid-column: span 2; }
  .card.w1 { grid-column: span 1; }
  .section-title { grid-column: span 2; }
  .toolpage { flex-direction: column; }
  .sidebar { width: 100%; position: static; }
  .workbench { padding: 22px 18px 26px; }
  .workbench > p.desc { padding-left: 0; }
}
@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; }
  .card.w2 { grid-column: span 1; flex-direction: column; align-items: flex-start; }
  .nav-links a { padding: 7px 10px; font-size: 14px; }
}