:root {
  /* Warm sunset-inspired wellness palette */
  --primary-color: #FF6B5B;      /* Warm coral-orange */
  --primary-dark: #E84C3F;       /* Darker coral for hover states */
  --primary-light: #FFB5AC;      /* Soft peachy tone */
  --secondary-color: #8B7B6B;    /* Warm taupe */
  --accent-color: #FFD700;       /* Warm gold */
  --accent-secondary: #A8D8A8;   /* Soft sage green */
  --accent-tertiary: #FDB750;    /* Warm amber */

  /* Neutral colors - warm cream palette */
  --background-color: #FFFAF0;   /* Warm cream background */
  --card-bg: #FFFBF5;            /* Warm off-white for cards */
  --border-color: #F5E6D3;       /* Warm subtle border */

  /* Text colors - warm charcoal */
  --text-primary: #3D2817;       /* Warm charcoal for primary text */
  --text-secondary: #6B5D52;     /* Warm gray for secondary text */
  --text-light: #9B8B7D;         /* Medium warm gray for tertiary text */
  --text-on-dark: #FFFAF0;       /* Warm cream text for dark backgrounds */

  /* Functional colors */
  --success-color: #A8D8A8;      /* Sage green for success states */
  --warning-color: #FDB750;      /* Warm amber for warnings */
  --danger-color: #FF6B5B;       /* Coral for errors/danger */
  --info-color: #FF8B7D;         /* Warm coral for information */

  /* UI component variables */
  --shadow-sm: 0 2px 8px rgba(255, 107, 91, 0.08);
  --shadow-md: 0 8px 16px rgba(255, 107, 91, 0.12);
  --shadow-lg: 0 12px 24px rgba(255, 107, 91, 0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  max-width: 100%;
  overflow-x: hidden;
  padding-bottom: 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 {
  font-size: 2.25rem;
  color: var(--primary-color);
}

h2 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
  color: var(--secondary-color);
}

h4 {
  font-size: 1.2rem;
  color: var(--text-primary);
}

h5 {
  font-size: 1.1rem;
  color: var(--text-primary);
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Navbar */
.navbar {
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.05), rgba(253, 183, 80, 0.05)) !important;
  border-bottom: 2px solid rgba(255, 107, 91, 0.1);
}

.navbar-brand {
  font-weight: 700;
  color: var(--primary-color) !important;
  font-size: 1.5rem;
  transition: color var(--transition-normal);
}

.navbar-brand:hover {
  color: var(--primary-dark) !important;
}

/* Cards */
.card {
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
  margin-bottom: 2rem;
  background-color: var(--card-bg);
  border-left: 5px solid var(--primary-color);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-header {
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.15), rgba(253, 183, 80, 0.1));
  border-bottom: 1px solid rgba(255, 107, 91, 0.1);
  padding: 1.5rem 1.5rem;
  font-weight: 600;
}

/* Fix for colored card headers - ensure text is white */
.card-header.bg-primary,
.card-header.bg-success,
.card-header.bg-info,
.card-header.bg-secondary,
.card-header.bg-danger {
  color: var(--text-on-dark);
  border-bottom: none;
}

/* Ensure all headings inside colored backgrounds are white */
.bg-primary h1, .bg-primary h2, .bg-primary h3, .bg-primary h4, .bg-primary h5, 
.bg-success h1, .bg-success h2, .bg-success h3, .bg-success h4, .bg-success h5,
.bg-info h1, .bg-info h2, .bg-info h3, .bg-info h4, .bg-info h5,
.bg-secondary h1, .bg-secondary h2, .bg-secondary h3, .bg-secondary h4, .bg-secondary h5,
.bg-danger h1, .bg-danger h2, .bg-danger h3, .bg-danger h4, .bg-danger h5 {
  color: var(--text-on-dark);
}

.card-header.bg-warning,
.bg-warning h1, .bg-warning h2, .bg-warning h3, .bg-warning h4, .bg-warning h5 {
  color: var(--text-primary); /* Dark text on yellow for better readability */
}

.card-header.bg-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
}

.card-header.bg-success {
  background: linear-gradient(135deg, var(--success-color), #7EC87E) !important;
}

.card-header.bg-info {
  background: linear-gradient(135deg, #FF8B7D, #FF6B5B) !important;
}

.card-header.bg-warning {
  background: linear-gradient(135deg, var(--warning-color), var(--accent-tertiary)) !important;
}

.card-header.bg-secondary {
  background: linear-gradient(135deg, var(--secondary-color), #6B5844) !important;
}

.card-body {
  padding: 2rem;
}

/* Buttons */
.btn {
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.5rem;
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-color: var(--primary-color);
  color: var(--text-on-dark);
}

.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, var(--primary-dark), #D63727);
  border-color: var(--primary-dark);
  box-shadow: 0 0 0 0.3rem rgba(255, 107, 91, 0.25);
}

.btn-success {
  background: linear-gradient(135deg, var(--success-color), #7EC87E);
  border-color: var(--success-color);
  color: var(--text-on-dark);
}

.btn-success:hover, .btn-success:focus {
  background: linear-gradient(135deg, #7EC87E, #5EB85E);
  border-color: #7EC87E;
  box-shadow: 0 0 0 0.3rem rgba(168, 216, 168, 0.25);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-color), #D63727);
  border-color: var(--danger-color);
  color: var(--text-on-dark);
}

.btn-danger:hover, .btn-danger:focus {
  background: linear-gradient(135deg, #D63727, #B82E1F);
  border-color: #D63727;
  box-shadow: 0 0 0 0.3rem rgba(255, 107, 91, 0.25);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary-color), #6B5844);
  border-color: var(--secondary-color);
  color: var(--text-on-dark);
}

.btn-secondary:hover, .btn-secondary:focus {
  background: linear-gradient(135deg, #6B5844, #5A4A38);
  border-color: #6B5844;
  box-shadow: 0 0 0 0.3rem rgba(139, 123, 107, 0.25);
}

.btn-outline-primary {
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  background-color: transparent;
}

.btn-outline-primary:hover {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-color: var(--primary-color);
  color: var(--text-on-dark);
}

/* White text for all buttons with bg color */
.btn-primary, .btn-success, .btn-info, .btn-secondary, .btn-danger,
.btn-outline-primary:hover, .btn-outline-success:hover, 
.btn-outline-info:hover, .btn-outline-secondary:hover, 
.btn-outline-danger:hover {
  color: var(--text-on-dark);
}

/* Alerts */
.alert {
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border-left: 5px solid;
}

.alert-success {
  background-color: rgba(168, 216, 168, 0.15);
  color: #5A8F5A;
  border-left-color: var(--success-color);
}

.alert-warning {
  background-color: rgba(253, 183, 80, 0.15);
  color: #B8860B;
  border-left-color: var(--warning-color);
}

.alert-danger {
  background-color: rgba(255, 107, 91, 0.15);
  color: #A84033;
  border-left-color: var(--danger-color);
}

.alert-info {
  background-color: rgba(255, 139, 125, 0.15);
  color: #B84033;
  border-left-color: var(--info-color);
}

/* Form Controls */
.form-control {
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: all var(--transition-normal);
  background-color: var(--card-bg);
  color: var(--text-primary);
}

.form-control:focus {
  border-color: var(--primary-color);
  background-color: var(--card-bg);
  box-shadow: 0 0 0 0.3rem rgba(255, 107, 91, 0.2);
  color: var(--text-primary);
}

.form-label {
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

/* Range Sliders */
input[type="range"] {
  width: 100%;
  margin: 1rem 0;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: linear-gradient(to right, rgba(255, 107, 91, 0.2), rgba(253, 183, 80, 0.2));
  border-radius: 4px;
  outline: none;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  border: 3px solid var(--card-bg);
}

input[type="range"]::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid var(--card-bg);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-lg);
}

input[type="range"]::-moz-range-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-lg);
}

/* Progress Bars */
.progress {
  height: 10px;
  background-color: rgba(255, 107, 91, 0.15);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-tertiary));
  transition: width 0.3s ease;
  box-shadow: 0 0 8px rgba(255, 107, 91, 0.3);
}

/* Jumbotron (Welcome Page) */
.jumbotron {
  padding: 3.5rem 2.5rem;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.08), rgba(253, 183, 80, 0.08), rgba(168, 216, 168, 0.08));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid rgba(255, 107, 91, 0.1);
}

/* Utilities */
.hidden {
  display: none;
}

.text-muted {
  color: var(--text-light) !important;
}

.empty-state {
  text-align: center;
  color: var(--text-light);
  margin: 2.5rem 0;
  padding: 2rem;
  background-color: rgba(0, 0, 0, 0.02);
  border-radius: var(--radius-md);
}

footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 2px solid var(--border-color);
  margin-top: 3rem;
  background: linear-gradient(135deg, rgba(255, 107, 91, 0.03), rgba(253, 183, 80, 0.03));
}

/* Treatment specific styles */
.treatment-controls {
  background-color: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .card {
    margin-bottom: 1rem;
  }
  
  .jumbotron {
    padding: 1.5rem;
  }
  
  .navbar-brand {
    font-size: 1.2rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 576px) {
  .card-header {
    padding: 0.75rem 1rem;
  }
  
  .card-body {
    padding: 1rem;
  }

  .btn {
    width: 100%;
    margin-bottom: 0.5rem;
  }

  .btn + .btn {
    margin-left: 0;
  }

  .d-flex .btn {
    width: auto;
    margin-bottom: 0;
  }
}