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

html,
body {
  height: 100%;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #1a1a2e;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.ver-bar {
  flex: 0 0 56px;
  height: 56px;
  background: linear-gradient(135deg, #0b3d78 0%, #005198 52%, #006bb8 100%);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  box-shadow: 0 4px 20px rgba(0, 41, 84, 0.35);
  z-index: 10;
}

.ver-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  transition: background 0.25s ease;
  white-space: nowrap;
}

.ver-back:hover {
  background: rgba(255, 255, 255, 0.24);
}

.ver-title {
  flex: 1;
  text-align: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ver-frame {
  flex: 1 1 auto;
  display: block;
  width: 100%;
  min-height: 0;
  border: 0;
  background: #ffffff;
}

.ver-book-shell {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
}

@media (max-width: 600px) {
  .ver-title {
    font-size: 13px;
  }

  .ver-back {
    padding: 8px 10px;
  }
}