:root{
  --bg: #0b1220;
  --card: rgba(255,255,255,0.06);
  --card2: rgba(255,255,255,0.08);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.65);
  --line: rgba(255,255,255,0.10);
  --accent: #6ea8fe;
  --danger: #ff6b6b;

  --radius: 14px;
  --shadow: 0 14px 40px rgba(0,0,0,0.35);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
}

*{ box-sizing:border-box; }
html, body{ height:100%; }
body{
  margin:0;
  font-family: var(--font);
  color: var(--text);
  background:
    var(--bg);
}

a{ color: var(--accent); text-decoration:none; }
code{ color: rgba(255,255,255,0.85); }

.page{
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 28px;
}

.card{
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.auth-card{
  width: min(420px, 100%);
  padding: 22px;
}

.title{
  margin: 0 0 6px 0;
  letter-spacing: 0.2px;
}

.muted{ color: var(--muted); }
.small{ font-size: 13px; }
.tiny{ font-size: 12px; margin-top: 14px; }

.alert{
  margin: 12px 0 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,107,107,0.35);
  background: rgba(255,107,107,0.12);
  color: rgba(255,255,255,0.92);
}

.info{
  margin: 0px 0 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(107,107,255,0.35);
  background: rgba(107,107,255,0.12);
  color: rgba(255,255,255,0.92);
}

.form{ margin-top: 0px; display:flex; flex-direction:column; gap: 10px; }
.label{ font-size: 13px; color: var(--muted); }

.input{
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.22);
  color: var(--text);
  outline: none;
}
.input:focus{
  border-color: rgba(110,168,254,0.55);
  box-shadow: 0 0 0 3px rgba(110,168,254,0.15);
}

.btn{
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  cursor: pointer;
}
.btn:hover{ background: rgba(255,255,255,0.12); }
.btn.primary{
  background: rgba(110,168,254,0.25);
  border-color: rgba(110,168,254,0.35);
}
.btn.primary:hover{ background: rgba(110,168,254,0.32); }
.btn.danger{
  background: rgba(255,107,107,0.18);
  border-color: rgba(255,107,107,0.30);
}
.btn.danger:hover{ background: rgba(255,107,107,0.26); }

.topbar{
  position: sticky;
  top: 0;
  z-index: 5;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(7,10,18,0.60);
  backdrop-filter: blur(10px);
}

.brand{
  display:flex;
  align-items:center;
  gap: 12px;
}
.logo{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(110,168,254,0.25);
  border: 1px solid rgba(110,168,254,0.35);
  font-weight: 700;
}
.brand-title{ font-weight: 650; letter-spacing: 0.2px; }
.brand-subtitle{ font-size: 12px; color: var(--muted); margin-top: 2px; }

.actions{
  display:flex;
  align-items:center;
  gap: 10px;
}
.actions form{ margin:0; }

.shell{
  height: calc(100vh - 70px);
  padding: 18px;
  display:grid;
  grid-template-columns: 480px 1fr;
  gap: 14px;
}

.list{
  overflow:auto;
}
.row{
  width: 100%;
  text-align:left;
  padding: 12px 12px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor:pointer;
}
.row:hover{
  background: rgba(255,255,255,0.06);
}
.row.active{
  background: rgba(110,168,254,0.14);
}
.row-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
}
.subject{
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}
.date{
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}
.row-bottom{
  margin-top: 6px;
  font-size: 12px;
}

.viewer{
  overflow:auto;
  padding: 14px;
}
.viewer-head{
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}
.viewer-subject{
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.viewer-body{
  line-height: 1.45;
  background: rgba(0,0,0,0.18);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  overflow:auto;
}

.empty{
  padding: 18px;
}
.empty-title{
  font-weight: 700;
  margin-bottom: 6px;
}

@media (max-width: 900px){
  .shell{
    grid-template-columns: 1fr;
    height: auto;
  }
  .subject{ max-width: 70vw; }
}