:root {
    /* Colors matching Essential Wellness theme */
    --primary-green: #4CAF50;
    --primary-green-dark: #388E3C;
    --primary-green-light: #81C784;

    --bg-light-green: #F1F8E9;
    --bg-white: #FFFFFF;
    --bg-gray-light: #F5F5F5;

    --text-dark: #212121;
    --text-gray: #757575;
    --text-light: #BDBDBD;

    --border-color: #E0E0E0;
    --error-color: #F44336;
    --success-color: #4CAF50;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Borders & Shadows */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

/* ====================================
   TOOL CONTAINER (Common wrapper)
   ==================================== */
.wellness-tool-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .wellness-tool-container {
        margin: 1rem;
        padding: var(--spacing-md);
    }
}

/* ====================================
   BUTTONS
   ==================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    min-width: 44px;
    /* Touch-friendly */
    min-height: 44px;
}

.btn-primary {
    background: var(--primary-green);
    color: white;
}

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

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

.btn-primary:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-gray-light);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-full-width {
    width: 100%;
    display: block;
}

/* ====================================
   FORM ELEMENTS
   ==================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-dark);
    font-size: var(--font-size-base);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: var(--transition-base);
    font-family: var(--font-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-input.error {
    border-color: var(--error-color);
}

.form-error-message {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--error-color);
    font-size: var(--font-size-sm);
}

/* Radio buttons & checkboxes */
.form-radio-group,
.form-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-radio-option,
.form-checkbox-option {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.form-radio-option:hover,
.form-checkbox-option:hover {
    border-color: var(--primary-green-light);
    background: var(--bg-light-green);
}

.form-radio-option.selected,
.form-checkbox-option.selected {
    border-color: var(--primary-green);
    background: var(--bg-light-green);
}

.form-radio-option input[type="radio"],
.form-checkbox-option input[type="checkbox"] {
    margin-right: var(--spacing-sm);
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.form-radio-option label,
.form-checkbox-option label {
    cursor: pointer;
    flex: 1;
    font-size: var(--font-size-base);
}

/* ====================================
   PROGRESS BAR
   ==================================== */
.progress-container {
    margin-bottom: var(--spacing-lg);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-gray-light);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-green), var(--primary-green-light));
    transition: width 0.4s ease;
    border-radius: 10px;
}

.progress-text {
    margin-top: var(--spacing-xs);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-gray);
}

/* ====================================
   CARDS
   ==================================== */
.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.card-content {
    color: var(--text-gray);
    line-height: 1.6;
}

/* ====================================
   LOADING STATES
   ==================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-gray-light);
    border-top-color: var(--primary-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-lg);
    color: var(--text-gray);
    text-align: center;
}

/* ====================================
   ALERTS & MESSAGES
   ==================================== */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background: #E8F5E9;
    border-color: var(--success-color);
    color: #2E7D32;
}

.alert-error {
    background: #FFEBEE;
    border-color: var(--error-color);
    color: #C62828;
}

.alert-info {
    background: #E3F2FD;
    border-color: #2196F3;
    color: #1565C0;
}

/* ====================================
   RESULTS DISPLAY
   ==================================== */
.result-container {
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.result-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.result-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: var(--spacing-sm);
}

.result-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-gray);
}

.result-section {
    margin-bottom: var(--spacing-xl);
}

.result-section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-green);
}

/* ====================================
   SOCIAL SHARING
   ==================================== */
.social-share {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.social-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    color: white;
    font-weight: 600;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.social-btn-facebook {
    background: #1877F2;
}

.social-btn-twitter {
    background: #1DA1F2;
}

.social-btn-email {
    background: #757575;
}

/* ====================================
   UTILITY CLASSES
   ==================================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* ====================================
   RESPONSIVE UTILITIES
   ==================================== */
@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }

    .show-mobile {
        display: block !important;
    }

    .text-center-mobile {
        text-align: center;
    }
}

@media (min-width: 769px) {
    .hide-desktop {
        display: none !important;
    }

    .show-desktop {
        display: block !important;
    }
}

/* ====================================
   ACCESSIBILITY
   ==================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus states for keyboard navigation */
.btn:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible {
    outline: 3px solid var(--primary-green);
    outline-offset: 2px;
}