body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #11151c 0%, #0b0e13 100%);
  color: #f4f1ea;
  text-align: center;
}

h1,
h2 {
  color: #00bcd4;
}

#login-section,
#library-content {
  max-width: 1100px;
  margin: 40px auto;
  padding: 24px;
  box-sizing: border-box;
}

#login-section {
  max-width: 460px;
  background: rgba(20, 25, 34, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

#login-section h1 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 2rem;
}

#loginForm {
  display: grid;
  gap: 12px;
}

form input {
  margin: 0.5em 0;
  padding: 14px 16px;
  width: 100%;
  box-sizing: border-box;
  background: #1b2230;
  color: #f4f1ea;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  font-size: 1rem;
}

form input::placeholder {
  color: #b9bec8;
}

button,
.portal-logout {
  padding: 14px 16px;
  background: linear-gradient(135deg, #d9b56d, #b78a3f);
  color: #11151c;
  border: none;
  cursor: pointer;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

button:hover,
.portal-logout:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(183, 138, 63, 0.25);
}

#login-error {
  margin-top: 12px;
}

.portal-shell {
  padding-top: 30px;
}

.portal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
  text-align: left;
}

.portal-header h2 {
  margin: 4px 0 8px;
  font-size: 2rem;
  color: #f4f1ea;
}

.portal-eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  color: #8ed8d2;
}

.portal-subtext {
  margin: 0;
  color: #c5cad3;
}

.portal-sections {
  display: grid;
  gap: 16px;
  text-align: left;
}

.portal-card {
  background: rgba(20, 25, 34, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.22);
}

.portal-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
}

.portal-card summary::-webkit-details-marker {
  display: none;
}

.portal-card summary strong {
  display: block;
  font-size: 1.05rem;
  color: #f4f1ea;
}

.portal-card summary small {
  display: block;
  margin-top: 4px;
  color: #bcc2cc;
  font-size: 0.9rem;
}

.portal-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(142, 216, 210, 0.12);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.portal-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  padding: 0 20px 20px;
}

.portal-links a {
  display: block;
  text-decoration: none;
  color: #f4f1ea;
  background: #18202c;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 14px 16px;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
  font-weight: 500;
}

.portal-link-card {
  display: grid;
  gap: 6px;
}

.portal-link-title {
  font-weight: 700;
}

.portal-link-description {
  color: #bcc2cc;
  font-size: 0.9rem;
  line-height: 1.35;
}

.portal-links a:hover {
  transform: translateY(-2px);
  border-color: rgba(142, 216, 210, 0.45);
  background: #1d2735;
}

@media (max-width: 700px) {
  #login-section,
  #library-content {
    margin: 20px auto;
    padding: 18px;
  }

  .portal-header {
    flex-direction: column;
    align-items: stretch;
  }

  .portal-logout {
    width: 100%;
  }

  .portal-links {
    grid-template-columns: 1fr;
  }
}