/**
 * MenoPlan Theme - Health-tech design
 * Colors: muted teal + soft green
 * Font: sans-serif (system stack or Inter/DM Sans)
 */

:root {
    /* Primary colors - teal */
    --c-primary: #2E7D7A;
    --c-primary-2: #4AA58D;
    --c-primary-light: #E8F4F3;
    --c-primary-dark: #1F5A57;
    
    /* Accent - soft green */
    --c-accent: #7FBF7A;
    --c-accent-light: #E8F5E6;
    
    /* Text colors */
    --c-ink: #123133;
    --c-ink-light: #4A5F61;
    --c-muted: #6B7C7D;
    --c-muted-light: #9BA8A9;
    
    /* Background */
    --c-bg: #F7FAFA;
    --c-bg-alt: #F0F5F5;
    --c-card: #FFFFFF;
    --c-border: #E4ECEC;
    --c-border-light: #F0F5F5;
    
    /* Status */
    --c-success: #7FBF7A;
    --c-success-light: #E8F5E6;
    --c-warning: #F5A623;
    --c-warning-light: #FEF4E0;
    --c-error: #E74C3C;
    --c-error-light: #FDE8E6;
    --c-info: #4AA58D;
    --c-info-light: #E8F4F3;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(18, 49, 51, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(18, 49, 51, 0.1), 0 2px 4px -1px rgba(18, 49, 51, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(18, 49, 51, 0.1), 0 4px 6px -2px rgba(18, 49, 51, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(18, 49, 51, 0.1), 0 10px 10px -5px rgba(18, 49, 51, 0.04);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'DM Sans', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

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

html {
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--c-ink);
    background-color: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--c-ink);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--c-ink-light);
}

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

a:hover {
    color: var(--c-primary-2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    max-width: 100%;
    box-sizing: border-box;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--c-primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) .btn-arrow {
    color: white;
    margin-left: calc(var(--spacing-sm) + 4px);
}

.btn:hover:not(:disabled) .btn-arrow {
    margin-left: calc(var(--spacing-sm) + 4px);
}

.btn-secondary {
    background-color: var(--c-card);
    color: var(--c-ink);
    border: 1px solid var(--c-border);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--c-bg);
    border-color: var(--c-primary);
}

.btn-accent {
    background-color: var(--c-accent);
    color: white;
}

.btn-accent:hover:not(:disabled) {
    background-color: #6BA866;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background-color: var(--c-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background-color: #6BA866;
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    line-height: 1.4;
    min-height: 3.5rem;
}

@media (max-width: 640px) {
    .btn {
        white-space: normal;
        word-wrap: break-word;
        hyphens: auto;
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-lg);
        width: 100%;
        max-width: 100%;
        min-height: 3.5rem;
        line-height: 1.4;
    }
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--c-ink);
    font-size: var(--font-size-sm);
}

.form-label .optional {
    color: var(--c-muted);
    font-weight: 400;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--c-ink);
    background-color: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--c-muted-light);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

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

.form-checkbox {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.form-checkbox input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.form-checkbox label {
    cursor: pointer;
    color: var(--c-ink-light);
    font-size: var(--font-size-sm);
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--c-border);
    border-radius: var(--radius-md);
    background-color: var(--c-card);
    transition: all var(--transition-fast);
    position: relative;
    padding-left: calc(var(--spacing-md) + 1.5rem + var(--spacing-sm));
    user-select: none;
}

.form-checkbox label::before {
    content: '';
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--c-border);
    border-radius: var(--radius-sm);
    background-color: var(--c-card);
    transition: all var(--transition-fast);
}

.form-checkbox input[type="checkbox"]:checked + label {
    background-color: var(--c-primary-light);
    border-color: var(--c-primary);
    color: var(--c-primary);
    font-weight: 500;
}

.form-checkbox input[type="checkbox"]:checked + label::before {
    background-color: var(--c-primary);
    border-color: var(--c-primary);
    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='white' d='M10 3L4.5 8.5L2 6l1.5-1.5L4.5 5.5L8.5 1.5L10 3z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 70%;
}

.form-checkbox label:hover {
    border-color: var(--c-primary);
    background-color: var(--c-bg);
}

.form-checkbox input[type="checkbox"]:checked + label:hover {
    background-color: var(--c-primary-light);
}

.form-checkbox label a {
    color: inherit;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.form-checkbox label a:hover {
    opacity: 0.8;
}

.form-checkbox input[type="checkbox"]:checked + label a {
    color: var(--c-primary);
}

.checkbox-group.error {
    border: 1px solid var(--c-error);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    background-color: var(--c-error-light);
}

.checkbox-group.error .form-checkbox label {
    border-color: var(--c-error);
    color: var(--c-error);
}

.checkbox-group.error .form-checkbox input[type="checkbox"]:checked + label {
    background-color: var(--c-error-light);
    border-color: var(--c-error);
    color: var(--c-error);
}

.form-radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-radio:hover {
    border-color: var(--c-primary);
    background-color: var(--c-primary-light);
}

.form-radio input[type="radio"] {
    accent-color: var(--c-primary);
}

.form-radio input[type="radio"]:checked + label {
    font-weight: 500;
    color: var(--c-primary);
}

.form-radio label {
    cursor: pointer;
    flex: 1;
}

/* Cards */
.card {
    background-color: var(--c-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--c-border-light);
}

.card-title {
    font-size: var(--font-size-xl);
    margin-bottom: 0;
}

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

/* Progress bar */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--c-border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--c-primary) 0%, var(--c-primary-2) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

/* Stepper */
.stepper {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.stepper::before {
    content: '';
    position: absolute;
    top: 1rem;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--c-border);
    z-index: 0;
}

.stepper-step {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.stepper-step-number {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-full);
    background-color: var(--c-card);
    border: 2px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--c-muted);
    margin-bottom: var(--spacing-sm);
}

.stepper-step.active .stepper-step-number {
    background-color: var(--c-primary);
    border-color: var(--c-primary);
    color: white;
}

.stepper-step.completed .stepper-step-number {
    background-color: var(--c-accent);
    border-color: var(--c-accent);
    color: white;
}

.stepper-step-label {
    font-size: var(--font-size-sm);
    color: var(--c-muted);
    text-align: center;
}

.stepper-step.active .stepper-step-label {
    color: var(--c-ink);
    font-weight: 500;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--c-primary-light);
    color: var(--c-primary-dark);
}

.badge-success {
    background-color: var(--c-success-light);
    color: var(--c-success);
}

.badge-warning {
    background-color: var(--c-warning-light);
    color: var(--c-warning);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-xl);
    color: var(--c-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

/* Toast notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

.toast {
    background-color: var(--c-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    border-left: 4px solid var(--c-success);
}

.toast-error {
    border-left: 4px solid var(--c-error);
}

.toast-info {
    border-left: 4px solid var(--c-info);
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
}

.toast-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    color: var(--c-muted);
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    color: var(--c-ink);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-lg {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--c-muted);
}

.mt-0 { margin-top: 0; }
.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-0 { margin-bottom: 0; }
.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;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Responsive */
@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .stepper-step-label {
        font-size: var(--font-size-xs);
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }
}

/* Slider Styles */
.slider-wrapper {
    margin-top: var(--spacing-md);
}

.slider-value-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--c-primary-light) 0%, var(--c-accent-light) 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.slider-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--c-primary);
    line-height: 1;
}

.slider-unit {
    font-size: var(--font-size-lg);
    color: var(--c-muted);
    font-weight: 500;
}

.slider-input {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-md);
    background: var(--c-border-light);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    margin: var(--spacing-md) 0;
    position: relative;
    z-index: 1;
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--c-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    border: 3px solid white;
    transition: all var(--transition-base);
    margin-top: -10px;
}

.slider-input::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(46, 125, 122, 0.4);
}

.slider-input::-webkit-slider-thumb:active {
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(46, 125, 122, 0.5);
}

.slider-input::-moz-range-thumb {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--c-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    border: 3px solid white;
    transition: all var(--transition-base);
}

.slider-input::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(46, 125, 122, 0.4);
}

.slider-input::-moz-range-thumb:active {
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(46, 125, 122, 0.5);
}

.slider-input::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-md);
    background: linear-gradient(to right, 
        var(--c-primary-light) 0%, 
        var(--c-primary-light) var(--slider-progress, 0%), 
        var(--c-border-light) var(--slider-progress, 0%), 
        var(--c-border-light) 100%);
}

.slider-input::-moz-range-track {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-md);
    background: var(--c-border-light);
}

.slider-input::-moz-range-progress {
    height: 8px;
    border-radius: var(--radius-md);
    background: linear-gradient(to right, var(--c-primary-light) 0%, var(--c-primary) 100%);
}

/* Progress fill for slider - using JavaScript instead */
.slider-wrapper {
    position: relative;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--c-muted);
}

@media (max-width: 640px) {
    .slider-value {
        font-size: var(--font-size-2xl);
    }
    
    .slider-unit {
        font-size: var(--font-size-base);
    }
    
    .slider-value-display {
        padding: var(--spacing-md);
    }
    
    .slider-input::-webkit-slider-thumb,
    .slider-input::-moz-range-thumb {
        width: 32px;
        height: 32px;
    }
}