body {
  font-family: Arial, sans-serif;
  margin:0;
  background:#f5f7fa;
  color:#333;
}
.main-header {
  background:#1f3c88;
  color:#fff;
  padding:12px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.main-header .brand { font-weight:700; font-size:18px; }
.main-header nav a {
  color:#fff;
  text-decoration:none;
  margin-left:15px;
  font-size:14px;
}
.main-header nav a:hover { text-decoration:underline; }

.content { padding:20px; }

.flash { background:#e0ffe3; border:1px solid #95d49a; padding:10px; margin-bottom:15px; }
.error { background:#ffe3e3; border:1px solid #d49595; padding:10px; margin:10px 0; }

.login-page { display:flex; align-items:center; justify-content:center; height:100vh; }
.login-box { background:#fff; padding:30px; border-radius:10px; width:320px; box-shadow:0 5px 18px rgba(0,0,0,.08);}
.login-box h2 { margin-top:0; }
.login-box input { width:93%; padding:8px; margin-bottom:10px; }
.login-box button { width:100%; padding:10px; background:#1f3c88; color:#fff; border:none; cursor:pointer; }

.listing { width:100%; border-collapse:collapse; background:#fff; box-shadow:0 2px 4px rgba(0,0,0,0.05); }
.listing th, .listing td { border:1px solid #ddd; padding:6px 8px; font-size:13px; }
.listing th { background:#f0f3f8; text-align:left; }
.listing tr:hover { background:#f9fcff; }

.listing.small td, .listing.small th { font-size:12px; }

button { cursor:pointer; border-radius:4px; border:1px solid #1f3c88; background:#1f3c88; color:#fff; padding:5px 10px; }
button[disabled] { background:#ccc; border-color:#bbb; cursor:not-allowed; }

.form { background:#fff; padding:20px; max-width:500px; border-radius:8px; box-shadow:0 2px 6px rgba(0,0,0,.08); }
.form label { display:block; margin-top:10px; font-weight:600; }
.form input[type=text], .form input[type=date], .form input[type=number], .form select, .form textarea {
  width:100%; padding:8px; margin-top:4px; border:1px solid #ccc; border-radius:4px; font-size:14px;
}
.form textarea { min-height:90px; resize:vertical; }
.form button { margin-top:15px; width:100%; }

.availTable { width:100%; border-collapse:collapse; background:#fff; }
.availTable th, .availTable td { border:1px solid #ddd; font-size:12px; padding:4px; text-align:center; }
.availTable th { background:#f0f2f5; }
.cell.avail { background:#d8ffe0; font-weight:bold; }
.cell.not-avail { background:#ffeaea; }
.cell { cursor:pointer; transition:background .2s; }
.cell:hover { filter:brightness(0.95); }

.modal { display:none; position:fixed; z-index:999; left:0; top:0; width:100%; height:100%; background:rgba(0,0,0,0.4); }
.modal-content { background:#fff; margin:60px auto; padding:20px; border-radius:10px; width:700px; max-width:95%; position:relative; }
.modal-content h3 { margin-top:0; }
.modal .close { position:absolute; right:15px; top:10px; cursor:pointer; font-size:20px; }

.footer { text-align:center; padding:15px; font-size:12px; color:#777; }

.dashboard-panels section { margin-bottom:30px; }

/* ---------- Nav Shell ---------- */
.main-header .nav {
  position: relative;
}

/* Layout */
.main-header .nav .menu {
  display: flex;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Links */
.main-header .nav a,
.main-header .nav .submenu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  color: #e2e8f0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

/* Hover/Focus */
.main-header .nav a:hover,
.main-header .nav a:focus,
.main-header .nav .submenu-toggle:hover,
.main-header .nav .submenu-toggle:focus {
  background: rgba(255,255,255,0.08);
  outline: none;
}

/* Submenu wrapper */
.menu-item.has-submenu {
  position: relative;
}

/* Submenu panel */
.submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: #0b1224;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  box-shadow:
    0 10px 30px rgba(0,0,0,0.25),
    inset 0 1px 0 rgba(255,255,255,0.04);
  padding: 8px;
  list-style: none;
  display: none;
  z-index: 50;
}
.submenu li a {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  color: #cbd5e1;
  font-weight: 500;
}
.submenu li a:hover,
.submenu li a:focus {
  background: rgba(255,255,255,0.08);
  color: #e2e8f0;
}

/* Show submenu on hover (desktop) */
.menu-item.has-submenu:hover > .submenu {
  display: block;
}

/* Logout spacing */
.menu-item.logout a {
  margin-left: 4px;
  background: #172036;
  border: 1px solid rgba(255,255,255,0.06);
}

/* ---------- Mobile ---------- */
.nav-toggle {
  display: none;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  background: #172036;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: #e2e8f0;
  font-weight: 600;
}
.nav-toggle .nav-toggle-bar {
  width: 18px;
  height: 2px;
  background: #e2e8f0;
  display: inline-block;
}
.menu-item.has-submenu.open > .submenu { display: block; }
.menu-item.has-submenu > .submenu::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: -10px;           /* sits above the panel */
  height: 12px;         /* buffer zone */
  background: transparent;
  /* this element belongs to the submenu, so hovering it still counts as "inside" */
}
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .main-header .nav .menu {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-top: 10px;
    background: #0b1224;
    border: 1px solid rgba(255,255,255,0.08);
    padding: 8px;
    border-radius: 14px;
  }
  .main-header .nav .menu.is-open { display: flex; }
  .menu-item.has-submenu .submenu {
    position: static;
    display: none;
    margin-top: 4px;
  }
  .menu-item.has-submenu.open > .submenu { display: block; }
}

@media (max-width:800px){
  .listing, .availTable { font-size:11px; }
  .modal-content { width:95%; }
}