/* janana.online 总控台 / 登录页共用样式
   —— 全外部文件，配合严格 CSP（无 inline style/script） */

:root{
  --txt:#e9eff6;
  --dim:#9aa8ba;
  --faint:#8fa0b3;
  --card:rgba(16,22,31,.62);
  --card-hi:rgba(24,33,46,.78);
  --line:rgba(126,156,196,.20);
  --line-hi:rgba(126,170,230,.42);
  --acc:#63a4ff;
  --ok:#3fd48a;
}

*{box-sizing:border-box}

html,body{height:100%}

body{
  margin:0;
  background:#080b10;
  color:var(--txt);
  font:15px/1.62 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- 背景层 ---------- */
#bg{
  position:fixed;
  inset:-2%;
  z-index:-3;
  background-position:center;
  background-size:cover;
  background-repeat:no-repeat;
  opacity:0;
  transform:scale(1.06);
  transition:opacity .9s ease, transform 14s ease-out;
  will-change:opacity,transform;
}
#bg.on{opacity:1;transform:scale(1)}

/* 压暗层：上下两条「文字带」压得重，中间留白让插画透出来。
   中间区域的文字都在卡片里，卡片自带毛玻璃底色，不需要额外遮罩。
   三档按图片平均亮度切换，实测正文/次要/页脚对比度 >= 4.5:1（WCAG AA）。 */
#veil{
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    linear-gradient(180deg, rgba(6,9,14,.74) 0%, rgba(6,9,14,.46) 15%, rgba(6,9,14,0) 33%),
    linear-gradient(0deg, rgba(6,9,14,.68) 0%, rgba(6,9,14,.40) 11%, rgba(6,9,14,0) 26%),
    linear-gradient(180deg, rgba(6,9,14,.14) 0%, rgba(6,9,14,.24) 100%);
  transition:opacity .5s ease;
}

/* 亮背景（平均亮度 > 176）：整体再压一层，正文与次要文字都要过 AA */
body[data-luma="bright"] #veil{
  background:
    linear-gradient(180deg, rgba(6,9,14,.80) 0%, rgba(6,9,14,.56) 15%, rgba(6,9,14,.10) 33%),
    linear-gradient(0deg, rgba(6,9,14,.74) 0%, rgba(6,9,14,.50) 11%, rgba(6,9,14,.08) 26%),
    linear-gradient(180deg, rgba(6,9,14,.30) 0%, rgba(6,9,14,.42) 100%);
}

/* 暗背景（平均亮度 < 96）：放轻，让画面更透 */
body[data-luma="dark"] #veil{
  background:
    linear-gradient(180deg, rgba(6,9,14,.66) 0%, rgba(6,9,14,.36) 15%, rgba(6,9,14,0) 33%),
    linear-gradient(0deg, rgba(6,9,14,.60) 0%, rgba(6,9,14,.30) 11%, rgba(6,9,14,0) 26%),
    linear-gradient(180deg, rgba(6,9,14,.06) 0%, rgba(6,9,14,.14) 100%);
}

/* 亮图时页脚那行小字最危险，单独提亮一档 */
body[data-luma="bright"] footer{color:#9fb0c4}

/* ---------- 通用容器 ---------- */
.wrap{
  position:relative;
  min-height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:46px 20px 34px;
}

/* ---------- 顶栏 ---------- */
.top{
  width:100%;
  max-width:900px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:30px;
}
.brand h1{
  margin:0;
  font-size:23px;
  font-weight:650;
  letter-spacing:.4px;
  text-shadow:0 2px 18px rgba(0,0,0,.55);
}
.brand .sub{
  margin-top:5px;
  color:var(--dim);
  font-size:12.5px;
  letter-spacing:.2px;
  text-shadow:0 1px 10px rgba(0,0,0,.6);
}

.acts{display:flex;gap:8px;flex-shrink:0}

.btn{
  appearance:none;
  cursor:pointer;
  font:inherit;
  font-size:12.5px;
  color:#cfe0f7;
  text-decoration:none;
  background:rgba(20,28,40,.62);
  border:1px solid var(--line);
  border-radius:9px;
  padding:7px 13px;
  transition:background .18s,border-color .18s,color .18s,transform .18s;
  white-space:nowrap;
}
.btn:hover{
  background:rgba(32,46,66,.80);
  border-color:var(--line-hi);
  color:#eaf3ff;
  transform:translateY(-1px);
}
.btn:active{transform:translateY(0)}

/* ---------- 卡片网格 ---------- */
.grid{
  display:grid;
  gap:15px;
  width:100%;
  max-width:900px;
  grid-template-columns:repeat(auto-fit,minmax(255px,1fr));
}

a.card{
  display:block;
  position:relative;
  overflow:hidden;
  text-decoration:none;
  color:inherit;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:15px;
  padding:19px 19px 16px;
  backdrop-filter:blur(12px) saturate(115%);
  -webkit-backdrop-filter:blur(12px) saturate(115%);
  transition:transform .2s cubic-bezier(.2,.7,.3,1), border-color .2s, background .2s, box-shadow .2s;
}
a.card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(150deg,rgba(99,164,255,.16),transparent 55%);
  opacity:0;
  transition:opacity .25s;
  pointer-events:none;
}
a.card:hover{
  transform:translateY(-3px);
  border-color:var(--line-hi);
  background:var(--card-hi);
  box-shadow:0 16px 34px -18px rgba(0,0,0,.9), 0 0 0 1px rgba(99,164,255,.10);
}
a.card:hover::before{opacity:1}

.t{
  display:flex;
  align-items:center;
  gap:9px;
  font-weight:600;
  font-size:15.5px;
  letter-spacing:.15px;
}
.dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 9px rgba(63,212,138,.7);
  flex-shrink:0;
}
.d{
  color:var(--dim);
  font-size:12.5px;
  margin-top:8px;
  line-height:1.6;
}
.p{
  display:inline-block;
  margin-top:12px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:11.5px;
  color:#a8c8f5;
  background:rgba(40,60,88,.55);
  border:1px solid rgba(90,130,180,.28);
  border-radius:6px;
  padding:2px 8px;
}

/* ---------- 页脚 ---------- */
footer{
  margin-top:auto;
  padding-top:40px;
  color:var(--faint);
  font-size:11.5px;
  text-align:center;
  line-height:1.85;
  text-shadow:0 1px 8px rgba(0,0,0,.7);
}
footer b{color:#8fa3bb;font-weight:500}

/* ---------- 登录页 ---------- */
.loginwrap{
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:28px 20px;
}

.login{
  width:100%;
  max-width:372px;
  background:rgba(14,20,28,.70);
  border:1px solid var(--line);
  border-radius:18px;
  padding:30px 28px 26px;
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  box-shadow:0 28px 70px -30px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.05);
}

.login .logo{
  font-size:19px;
  font-weight:650;
  letter-spacing:.5px;
  margin:0 0 4px;
}
.login .hint{
  color:var(--dim);
  font-size:12.5px;
  margin-bottom:22px;
}

.field{margin-bottom:14px}
.field label{
  display:block;
  font-size:12px;
  color:var(--dim);
  margin-bottom:6px;
  letter-spacing:.3px;
}
.field input{
  width:100%;
  font:inherit;
  font-size:14.5px;
  color:var(--txt);
  background:rgba(8,12,18,.66);
  border:1px solid var(--line);
  border-radius:10px;
  padding:11px 13px;
  transition:border-color .18s, box-shadow .18s, background .18s;
}
.field input:focus{
  outline:none;
  border-color:rgba(99,164,255,.65);
  background:rgba(10,16,24,.85);
  box-shadow:0 0 0 3px rgba(99,164,255,.16);
}
.field input::placeholder{color:#55637a}

.submit{
  width:100%;
  margin-top:8px;
  font:inherit;
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.6px;
  color:#08111d;
  background:linear-gradient(180deg,#8fc0ff,#5fa2f5);
  border:none;
  border-radius:10px;
  padding:11px 14px;
  cursor:pointer;
  transition:filter .18s, transform .18s;
}
.submit:hover{filter:brightness(1.07);transform:translateY(-1px)}
.submit:active{transform:translateY(0)}

.err{
  display:none;
  margin-bottom:16px;
  padding:9px 12px;
  font-size:12.5px;
  color:#ffc2c2;
  background:rgba(120,30,40,.35);
  border:1px solid rgba(220,90,100,.42);
  border-radius:9px;
}
.err.show{display:block}

.login .foot{
  margin-top:20px;
  text-align:center;
  color:var(--faint);
  font-size:11px;
  line-height:1.7;
}

/* ---------- 隐藏卡片模式 ----------
   收起后只剩背景图。顶栏/页脚/卡片一起淡出，背景遮罩也放轻，
   因为这时屏幕上没有任何需要压暗的文字。 */
.grid,
.top,
footer{
  transition:opacity .45s ease, transform .45s ease;
}

body.hidecards .grid,
body.hidecards footer{
  opacity:0;
  transform:translateY(10px);
  pointer-events:none;
}

body.hidecards .top{
  opacity:0;
  pointer-events:none;
}

/* 鼠标靠近屏幕顶部时把顶栏唤回来，不然找不到「显示」按钮 */
body.hidecards.peek .top{
  opacity:1;
  pointer-events:auto;
}

/* 藏起来时遮罩整体减轻，让插画完整露出来 */
body.hidecards #veil{
  opacity:.42;
}

@media (prefers-reduced-motion:reduce){
  .grid,.top,footer,#bg,#veil{transition:none}
}

@media (max-width:520px){
  .wrap{padding:26px 14px 24px}
  .top{flex-direction:column;align-items:flex-start;gap:14px}
  .brand h1{font-size:20px}
  .login{padding:26px 20px 22px}
}