/* (A) FONT & FORM */
* { font-family: Arial, sans-serif; }
h1, h2, h3, h4, h5, h6 { margin: 5px 0; }
button, input, textarea {
  box-sizing: border-box; padding: 10px;
}
button, input[type=button], input[type=submit] {
  color: #fff; background: #00a0d0;
  border: 0; cursor: pointer;
  border-radius: 8em;
}

/* (B) NOW LOADING */
#page-loader {
  position: fixed; top: 0; left: 0; z-index: 999;
  width: 100vw; height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  display: flex; align-items: center; justify-content: center;
  visibility: hidden; opacity: 0;
  transition: opacity 0.2s;
}
#page-loader.active { visibility: visible; opacity: 1; }

/* (C) PAGE LAYOUT */
body {
  padding: 0; margin: 0; display: flex;
  align-items: stretch; min-height: 100vh;
}
#page-sidebar { width: 200px; }
#page-main { flex-grow: 1; }

/* (D) SIDEBAR */
/* (D1) SIDEBAR ITSELF */
#page-sidebar {
  background: #353535;
  transition: width 0.2s;
}

/* (D2) SIDEBAR ITEMS */
#page-sidebar a {
  box-sizing: border-box; display: block;
  width: 100%; padding: 10px;
  color: #fff; text-decoration: none;
  border-bottom: 1px solid #555;
}
#page-sidebar a:hover { background: #222; }

/* (D3) SIDEBAR ICONS */
#page-sidebar .ico {
  display: inline-block; width:24px; text-align: center;
  font-size: 20px; line-height: 20px; color: #00a0d0;
}

/* (D4) HIDE SIDEBAR ON SMALL SCREEN */
@media (max-width: 768px) {
  #page-sidebar { width: 0; visibility: hidden; }
  #page-sidebar.active { width: 200px; visibility: visible; }
}

/* (E) PAGE MAIN */
/* (E1) MAIN SECTION ITSELF */
#page-main { background: #f7f9fa; }

/* (E2) NAVIGATION BAR */
#page-nav {
  position: relative; height: 42px;
  color: #fff; background: #474747;
}

/* (E3) NAVIGATION BAR BUTTONS */
#page-button-side, #page-button-out {
  position: absolute; top: 0;
  width: 42px; height: 42px; line-height: 42px;
  font-size: 28px; font-weight: bold; text-align: center;
  background: #00a0d0; cursor: pointer;
}
#page-button-side { display: none; left: 0; }
#page-button-out { right: 0; }
@media (max-width: 768px) {
  #page-button-side { display: block !important; }
}

/* (E4) CONTENTS */
#page-contents { padding: 20px; }

#login-form  {
  background: none;
}