:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --fg: #e2e8f0;
  --fg-dim: #94a3b8;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.1);
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --hero-grad: linear-gradient(120deg, #22d3ee, #a78bfa);
  --glow: 0 0 24px rgba(34, 211, 238, 0.35);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(167, 139, 250, 0.18), transparent 60%),
              radial-gradient(900px 500px at 10% 110%, rgba(34, 211, 238, 0.12), transparent 60%),
              var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.7;
}

/* ===== 顶栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--card-border);
}

.logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-decoration: none;
  background: var(--hero-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: transform 0.2s;
}
.logo:hover { transform: scale(1.05); }

.switcher { display: flex; gap: 8px; flex-wrap: wrap; }

.header-actions { display: flex; align-items: center; gap: 12px; }

.settings-btn {
  appearance: none;
  width: 36px; height: 36px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--fg-dim);
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
}
.settings-btn:hover { color: var(--fg); border-color: var(--accent); transform: rotate(30deg); }

.switch-btn {
  appearance: none;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--fg-dim);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  backdrop-filter: blur(8px);
}
.switch-btn:hover { color: var(--fg); border-color: var(--accent); box-shadow: var(--glow); }
.switch-btn.active {
  color: #0f172a;
  background: var(--hero-grad);
  border-color: transparent;
  font-weight: 600;
}

/* ===== 主体 ===== */
.container {
  flex: 1;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

/* ===== 选择首页 ===== */
.home-hero { text-align: center; padding: 56px 0 40px; }

.home-hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 900;
  letter-spacing: 1px;
  background: var(--hero-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: float-in 0.6s ease-out;
}

.home-hero p {
  margin-top: 14px;
  color: var(--fg-dim);
  font-size: 18px;
}

@keyframes float-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

.home-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.home-card {
  display: block;
  text-align: left;
  padding: 28px 24px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--fg);
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  animation: float-in 0.5s ease-out both;
}
.home-card:nth-child(2) { animation-delay: 0.08s; }
.home-card:nth-child(3) { animation-delay: 0.16s; }

.home-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}

.home-card .icon { font-size: 34px; }
.home-card h3 { margin: 12px 0 6px; font-size: 19px; }
.home-card p { color: var(--fg-dim); font-size: 14px; }

/* ===== 页脚 ===== */
.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  padding: 20px;
  color: var(--fg-dim);
  font-size: 13px;
  border-top: 1px solid var(--card-border);
  background: rgba(15, 23, 42, 0.6);
}
.heart { color: #f472b6; }
.footer-link { color: var(--fg-dim); text-decoration: none; }
.footer-link:hover { color: var(--accent); }

/* ===== 加载指示 ===== */
.loading {
  text-align: center;
  color: var(--fg-dim);
  padding: 80px 0;
  font-size: 15px;
}
.loading::before {
  content: "";
  display: inline-block;
  width: 18px; height: 18px;
  margin-right: 10px;
  vertical-align: -3px;
  border: 2px solid var(--card-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 640px) {
  .site-header { flex-direction: column; padding: 12px 16px; }
  .container { padding: 20px 14px 40px; }
}

/* ===== WebDAV 备份设置面板 ===== */
.modal {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(8, 12, 24, 0.8);
  backdrop-filter: blur(8px);
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  overflow-y: auto;
  background: #111a2e;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
  animation: lb-pop 0.3s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}
.modal-card h3 { font-size: 19px; margin-bottom: 6px; }
.modal-tip { font-size: 12px; color: #94a3b8; margin-bottom: 18px; line-height: 1.6; }
.modal-card label {
  display: block;
  font-size: 12px;
  color: #94a3b8;
  margin-bottom: 12px;
}
.modal-card input[type="text"],
.modal-card input[type="password"] {
  display: block;
  width: 100%;
  margin-top: 5px;
  padding: 9px 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: #e2e8f0;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.modal-card input:focus { border-color: #22d3ee; }
.modal-card .wd-auto {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: #cbd5e1;
  cursor: pointer;
}
.wd-btns { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 12px; }
.wd-btns button {
  appearance: none;
  border: 1px solid rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.1);
  color: #22d3ee;
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.wd-btns button:hover { background: rgba(34, 211, 238, 0.22); }
.wd-btns button.warn {
  border-color: rgba(244, 63, 94, 0.4);
  background: rgba(244, 63, 94, 0.1);
  color: #fb7185;
}
.wd-btns button.warn:hover { background: rgba(244, 63, 94, 0.22); }
.wd-btns button:disabled { opacity: 0.5; cursor: wait; }
.wd-msg {
  min-height: 22px;
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.6;
  word-break: break-all;
}
.wd-msg.ok { color: #4ade80; }
.wd-msg.err { color: #f87171; }
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px;
  border: none; border-radius: 50%;
  background: rgba(0, 0, 0, 0.4);
  color: #94a3b8;
  font-size: 14px;
  cursor: pointer;
}
.modal-close:hover { background: rgba(248, 113, 113, 0.7); color: #fff; }