:root{
  --bg:#0b1220;
  --card:#0f1a2e;
  --muted:#93a4c7;
  --text:#e7eeff;
  --accent:#4f8cff;
  --accent2:#22c55e;
  --danger:#ef4444;
  --warning:#f59e0b;
  --border:rgba(255,255,255,.12);
  --shadow:0 12px 30px rgba(0,0,0,.25);
  --radius:14px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{display:flex;flex-direction:column;min-height:100vh}
.main{flex:1}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  background:radial-gradient(1200px 600px at 10% 0%, rgba(79,140,255,.22), transparent 60%),
             radial-gradient(900px 500px at 100% 20%, rgba(34,197,94,.18), transparent 55%),
             var(--bg);
  color:var(--text);
}

a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}

.container{max-width:1100px;margin:0 auto;padding:20px}

.navbar{
  position:sticky;top:0;z-index:100;
  background:rgba(15,26,46,.78);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}

.navbar .nav-inner{max-width:1500px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:12px}

.brand{font-weight:800;letter-spacing:.2px}
.brand small{display:block;font-weight:500;color:var(--muted);font-size:12px;line-height:1.1}

.nav-links{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:10px;flex:1;min-width:0}
.nav-links>li{position:relative}
.nav-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 12px;
  border-radius:12px;
  color:var(--text);
}
.nav-item:hover{background:rgba(255,255,255,.06)}

.dropdown-toggle::after{content:"▾";font-size:12px;color:var(--muted)}

.dropdown-menu{
  display:none;
  list-style:none;
  margin:0;
  padding:8px;
  position:absolute;
  top:44px;
  left:50%;
  transform:translateX(-50%);
  width: max-content;
  max-width:min(320px, calc(100vw - 24px));
  padding:8px;
  background:rgba(15,26,46,.92);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow);
}

/* remove hover gap between trigger and menu */
.dropdown-menu{margin-top:-6px}

.dropdown-menu a{
  display:block;
  padding:10px 18px;
  border-radius:10px;
  color:var(--text);
  text-align:center;
  white-space: nowrap;
}
.dropdown-menu a:hover{background:rgba(255,255,255,.06)}

/* Keep dropdowns within viewport on narrow screens */
/* Right align dropdown menu for account section */
.nav-right .dropdown-menu{
  left:50%;
  right:auto;
  transform:translateX(-50%);
}

@media (max-width: 860px){
  .dropdown-menu{
    left:0;
    right:0;
    transform:none;
    margin:0 auto;
  }
}

.dropdown:hover .dropdown-menu{display:block}

/* focus-within 会导致点击后菜单粘住，从而出现多个下拉重叠；禁用以保持 hover 行为一致 */


.nav-right{display:flex;align-items:center;gap:10px;padding-right:30px}

.search-form{display:flex;align-items:center;gap:8px;max-width:360px;min-width:200px}
.search-form input,
.search-form .search-input{
  flex:1;
  height:38px;
  padding:0 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.16);
  background:#ffffff;
  color:#0b1220;
  outline:none;
}
.search-form input::placeholder,
.search-form .search-input::placeholder{color:rgba(11,18,32,.45)}
.search-form input:focus,
.search-form .search-input:focus{border-color:rgba(79,140,255,.65);box-shadow:0 0 0 4px rgba(79,140,255,.18)}

.btn{
  height:38px;
  padding:0 14px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(79,140,255,.18);
  color:var(--text);
  cursor:pointer;
}
.btn:hover{background:rgba(79,140,255,.28)}
.btn.primary{background:linear-gradient(135deg, rgba(79,140,255,.95), rgba(79,140,255,.55));border-color:transparent}
.btn.primary:hover{filter:brightness(1.05)}

.main{max-width:1500px;margin:0 auto;padding:26px 16px}

.card{
  background:rgba(15,26,46,.70);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
  overflow: hidden;
}

.card .resized-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 16px 0;
  border-radius: 8px;
}

.flash-messages{max-width:1100px;margin:12px auto 0;padding:0 16px}
.flash{padding:12px 14px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.06)}
.flash.success{border-color:rgba(34,197,94,.45);background:rgba(34,197,94,.12)}
.flash.warning{border-color:rgba(245,158,11,.45);background:rgba(245,158,11,.12)}
.flash.info{border-color:rgba(79,140,255,.45);background:rgba(79,140,255,.12)}
.flash.error{border-color:rgba(239,68,68,.45);background:rgba(239,68,68,.12)}

.toast-stack{
  position:fixed;
  top:84px;
  right:18px;
  left:auto;
  z-index:1000;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:12px;
  width:auto;
  max-width:min(420px, calc(100vw - 36px));
  pointer-events:none;
}

.toast{
  pointer-events:auto;
  display:inline-grid;
  width:fit-content;
  max-width:min(420px, calc(100vw - 36px));
  grid-template-columns:26px 1fr;
  align-items:center;
  gap:12px;
  padding:12px 16px;
  min-height:54px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.16);
  background:linear-gradient(180deg, rgba(15,26,46,.94), rgba(15,26,46,.72));
  backdrop-filter:blur(14px);
  box-shadow:0 14px 34px rgba(0,0,0,.40);
  transform:translateX(16px);
  opacity:0;
  animation:toast-in .28s cubic-bezier(.2,.9,.2,1) forwards;
}

.toast-body{
  line-height:1.35;
  color:var(--text);
  font-size:15px;
  letter-spacing:.2px;
}

.toast-close{display:none !important}

.toast-icon{
  width:26px;
  height:26px;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
}
.toast:not(.toast-success):not(.toast-info):not(.toast-warning):not(.toast-error) .toast-icon{display:none}
.toast-success .toast-icon{background:rgba(34,197,94,.14);border-color:rgba(34,197,94,.35)}
.toast-success .toast-icon::before{content:"✓";color:rgba(34,197,94,.95)}

.toast-info .toast-icon{background:rgba(79,140,255,.14);border-color:rgba(79,140,255,.35)}
.toast-info .toast-icon::before{content:"i";color:rgba(79,140,255,.95);font-weight:700}

.toast-warning .toast-icon{background:rgba(245,158,11,.14);border-color:rgba(245,158,11,.35)}
.toast-warning .toast-icon::before{content:"!";color:rgba(245,158,11,.95);font-weight:800}

.toast-error .toast-icon{background:rgba(239,68,68,.14);border-color:rgba(239,68,68,.35)}
.toast-error .toast-icon::before{content:"×";color:rgba(239,68,68,.95);font-weight:800}
.toast.is-leaving{animation:toast-out .28s cubic-bezier(.4,0,1,1) forwards}

@keyframes toast-in{
  from{opacity:0;transform:translateX(16px) scale(.98)}
  to{opacity:1;transform:translateX(0) scale(1)}
}

@keyframes toast-out{
  from{opacity:1;transform:translateX(0) scale(1)}
  to{opacity:0;transform:translateX(16px) scale(.98)}
}

.form{
  max-width:520px;
}
.form .field{margin:12px 0}
.form label{display:block;margin:0 0 6px;color:var(--muted)}
.form input{
  width:100%;
  height:42px;
  padding:0 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.06);
  color:var(--text);
  outline:none;
}
.form input:focus{border-color:rgba(79,140,255,.65);box-shadow:0 0 0 4px rgba(79,140,255,.18)}

.muted{color:var(--muted)}

.footer{width:100%;margin:0;padding:24px 16px;color:rgba(231,238,255,.55);text-align:left}

@media (max-width: 860px){
  .nav-inner{flex-wrap:wrap}
  .search-form{min-width:160px;max-width:100%}
  .nav-links{flex-wrap:wrap}
}
.nav-right > .dropdown{                /* ① 给按钮建立定位上下文 */
  position:relative;
}.nav-right > .dropdown .dropdown-menu{ /* ② 菜单水平居中展开 */
  left:50%;
  right:auto;
  transform:translateX(-50%);
}