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

body { 
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: #f8f9fa;
  color: #212529;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Auth vs app screen modes */
.auth-screen main.container {
  min-height: calc(100vh - 96px);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 60px;
  padding-bottom: 60px;
}

.auth-screen #searchPanel,
.auth-screen #settingsButtonContainer,
.auth-screen #results {
  display: none !important;
}

.hidden {
  display: none !important;
}

.link-primary {
  color: #0056b3;
  text-decoration: none;
}

.link-primary:hover {
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
}

header {
  background: #fff;
  border-bottom: 3px solid #0056b3;
  padding: 32px 0;
  margin-bottom: 48px;
}

header .container {
  padding: 0 40px;
}

h1 {
  font-size: 36px;
  font-weight: 300;
  color: #0056b3;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.lead {
  font-size: 16px;
  color: #6c757d;
  font-weight: 400;
  max-width: 720px;
}

main.container {
  padding: 0 40px 60px;
}

/* --- Panels (Login, Signup, Search) --- */
#loginPanel, #signupPanel, .search-panel, #settingsPanel, .panel-card {
  background: #fff;
  border: 1px solid #dee2e6;
  border-radius: 2px;
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

#loginPanel,
#signupPanel {
  max-width: 460px;
  width: 100%;
}

#loginPanel input, 
#signupPanel input, 
#settingsPanel input, 
#searchInput {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid #ced4da;
  border-radius: 2px;
  font-size: 17px;
  color: #212529;
  font-family: inherit;
  margin-bottom: 16px;
  transition: border-color 0.15s;
  background: #fff;
}

#loginPanel input:focus,
#signupPanel input:focus,
#settingsPanel input:focus,
#searchInput:focus {
  outline: none;
  border-color: #0056b3;
  box-shadow: 0 0 0 3px rgba(0,86,179,0.1);
}

#loginPanel input::placeholder,
#signupPanel input::placeholder,
#settingsPanel input::placeholder,
#searchInput::placeholder {
  color: #adb5bd;
}

#loginBtn, 
#signupBtn, 
#searchBtn,
#changeUsernameBtn,
#logoutBtn {
  padding: 16px 48px;
  background: #0056b3;
  color: #fff;
  border: none;
  border-radius: 2px;
  font-size: 17px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  white-space: nowrap;
  letter-spacing: 0.3px;
}

#logoutBtn {
  background: #dc3545;
}

#loginBtn:hover, 
#signupBtn:hover, 
#searchBtn:hover,
#changeUsernameBtn:hover {
  background: #004494;
}

#logoutBtn:hover {
  background: #b22a37;
}

#loginBtn:active, 
#signupBtn:active, 
#searchBtn:active,
#changeUsernameBtn:active,
#logoutBtn:active {
  background: #003875;
  transform: scale(0.98);
}

/* Settings Button Row */
.settings-actions {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}

/* Search Layout */
.form-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-bottom: 32px;
}

.controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-top: 32px;
  border-top: 1px solid #e9ecef;
}

.control-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #495057;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #ced4da;
  border-radius: 2px;
  font-size: 15px;
  color: #212529;
  background: #fff;
  font-family: inherit;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23495057' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

select:focus {
  outline: none;
  border-color: #0056b3;
}

#results {
  min-height: 200px;
}

/* Result Cards */
.result-card {
  background: #fff;
  border-left: 4px solid #dee2e6;
  padding: 28px 32px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: all 0.2s;
}

.result-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transform: translateX(4px);
}

.result-card.severity-high { border-left-color: #dc3545; }
.result-card.severity-moderate { border-left-color: #ffc107; }
.result-card.severity-low { border-left-color: #28a745; }

.card-header { 
  display: flex; 
  align-items: center; 
  gap: 16px; 
  margin-bottom: 16px; 
}

.card-title { 
  font-size: 22px; 
  font-weight: 400; 
  color: #212529; 
  letter-spacing: -0.3px; 
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.severity-high { background: #dc3545; color: #fff; }
.badge.severity-moderate { background: #ffc107; color: #212529; }
.badge.severity-low { background: #28a745; color: #fff; }

.card-body { 
  font-size: 15px; 
  color: #495057; 
  line-height: 1.7; 
}

.small { 
  font-size: 13px; 
  color: #6c757d; 
  margin-top: 12px; 
  display: block; 
}

.error {
  color: #dc3545;
}

.success {
  color: #28a745;
}

.info {
  color: #0056b3;
}

.subheading {
  font-size: 18px;
  margin-bottom: 12px;
}

.button-row {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.secondary-btn {
  padding: 16px 32px;
  background: #6c757d;
  color: #fff;
  border: none;
  border-radius: 2px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.secondary-btn:hover {
  background: #5a6268;
}

.danger-btn {
  padding: 12px 24px;
  background: #dc3545;
  color: #fff;
  border: none;
  border-radius: 2px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.danger-btn:hover {
  background: #b22a37;
}

.drug-list {
  margin: 20px 0;
}

.drug-item {
  background: #f8f9fa;
  padding: 12px 16px;
  margin-bottom: 8px;
  border-radius: 2px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drug-item button {
  padding: 8px 16px;
  font-size: 14px;
}

/* Settings modal */
#settingsPanel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 480px;
  width: 90%;
  z-index: 901;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 900;
}

.empty-state { 
  text-align: center; 
  padding: 80px 40px; 
  color: #adb5bd; 
}

.empty-icon { 
  font-size: 64px; 
  margin-bottom: 16px; 
  opacity: 0.3; 
}

.empty-text { 
  font-size: 15px; 
  color: #6c757d; 
}

/* Responsive */
@media (max-width: 768px) {
  header .container,
  main.container { 
    padding-left: 20px; 
    padding-right: 20px; 
  }

  h1 { font-size: 28px; }

  .search-panel, 
  #loginPanel, 
  #signupPanel, 
  #settingsPanel { 
    padding: 24px; 
  }

  .form-row { 
    grid-template-columns: 1fr; 
  }

  .controls-row { 
    grid-template-columns: 1fr; 
    gap: 16px; 
  }

  #searchBtn, 
  #loginBtn, 
  #signupBtn,
  #changeUsernameBtn,
  #logoutBtn {
    width: 100%; 
  }

  .settings-actions {
    flex-direction: column;
  }

  .button-row {
    flex-direction: column;
  }
}