body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(circle at top, #0b223b, #05111d 55%, #030913 100%);
  color: #d8e1ea;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid rgba(120, 150, 190, 0.18);
  background: rgba(4, 12, 24, 0.85);
  backdrop-filter: blur(8px);
}

.container {
  max-width: 1100px;
  margin: 30px auto;
  padding: 0 20px 30px;
}

.panel,
.login-panel {
  background: rgba(7, 16, 30, 0.88);
  border: 1px solid rgba(120, 150, 190, 0.18);
  border-radius: 14px;
  padding: 30px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.login-panel {
  max-width: 460px;
  margin: 60px auto;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 2px;
  color: #84a7d6;
  margin-bottom: 8px;
}

h1 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 38px;
}

.muted {
  color: #93a7bc;
}

.login-form,
.upload-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}

input[type="text"],
input[type="password"],
input[type="file"] {
  background: #08131f;
  border: 1px solid rgba(120, 150, 190, 0.22);
  color: #d8e1ea;
  padding: 12px;
  border-radius: 8px;
}

button {
  background: #2d6cdf;
  color: white;
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  cursor: pointer;
}

.table-box {
  margin-top: 24px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(5, 12, 22, 0.7);
}

th, td {
  text-align: left;
  padding: 14px 12px;
  border-bottom: 1px solid rgba(120, 150, 190, 0.15);
}

a {
  color: #7eb4ff;
  text-decoration: none;
}

.userbox {
  display: flex;
  gap: 14px;
  align-items: center;
}

.flash {
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.flash.ok {
  background: rgba(32, 124, 79, 0.18);
  border: 1px solid rgba(72, 170, 117, 0.35);
}

.flash.error {
  background: rgba(145, 40, 40, 0.18);
  border: 1px solid rgba(190, 80, 80, 0.35);
}