/**
 * Base CSS - Ruffo Life ADHS Screening Application
 * Ruffo Life Branding & Global Styles
 * Version: 1.0
 * Last Updated: March 20, 2026
 */

/* ============================================================================
   CSS Custom Properties (Variables) - Ruffo Life Color Palette
   ============================================================================ */

:root {
    /* Brand Colors */
    --color-dark: #1a1a1a;           /* Anthracite - text, headers */
    --color-background: whitesmoke;   /* Base bright background */
    --color-primary: #045c5c;         /* Deep petrol - primary actions */
    --color-petrol-hint: #e6f0f0;     /* Petrol hint - subtle backgrounds */
    --color-light-gray: #eaeaea;      /* Light gray - borders, dividers */
    --color-accent: #e85d04;          /* Glow orange - highlights, CTAs */

    /* Semantic Colors */
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-info: #17a2b8;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

    /* Font Sizes */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */

    /* Spacing */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-background);
    min-height: 100vh;
}

/* ============================================================================
   Typography
   ============================================================================ */

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

h1 {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
}

h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
}

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);
}

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

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

strong, b {
    font-weight: 600;
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    padding: 0.2em 0.4em;
    background-color: var(--color-light-gray);
    border-radius: var(--radius-sm);
}

/* ============================================================================
   Buttons
   ============================================================================ */

.button,
button:not(.unstyled) {
    display: inline-block;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    min-height: 44px; /* Touch-friendly minimum */
}

.button-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.button-primary:hover {
    background-color: #034a4a;
    border-color: #034a4a;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.button-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.button-secondary {
    background-color: white;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.button-secondary:hover {
    background-color: var(--color-petrol-hint);
    text-decoration: none;
}

.button-accent {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.button-accent:hover {
    background-color: #d05003;
    border-color: #d05003;
    text-decoration: none;
}

.button-large {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
    min-height: 52px;
}

.button-small {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    min-height: 36px;
}

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

button:disabled,
.button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================================================
   Forms
   ============================================================================ */

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

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

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-dark);
    background-color: white;
    background-clip: padding-box;
    border: 2px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(4, 92, 92, 0.1);
}

.form-input::placeholder {
    color: #999;
}

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

.form-checkbox,
.form-radio {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

.form-checkbox-label,
.form-radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin-bottom: var(--spacing-sm);
}

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

.form-help {
    color: #666;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ============================================================================
   Cards & Containers
   ============================================================================ */

.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

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

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
}

.card-body {
    padding: var(--spacing-lg) 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: 800px;
}

.container-wide {
    max-width: 1400px;
}

/* ============================================================================
   Progress Bar
   ============================================================================ */

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

.progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    transition: width var(--transition-slow);
    border-radius: var(--radius-full);
}

.progress-bar-accent {
    background-color: var(--color-accent);
}

/* ============================================================================
   Alerts & Messages
   ============================================================================ */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeaa7;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

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

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }

.font-bold { font-weight: 600; }
.font-normal { font-weight: 400; }

/* Display Utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

/* Flexbox Utilities */
.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.875rem;  /* 30px on mobile */
        --font-size-3xl: 1.5rem;    /* 24px on mobile */
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .card {
        padding: var(--spacing-lg);
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .button-large {
        padding: 14px 24px;
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    .button {
        padding: 10px 20px;
    }

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

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
    body {
        background-color: white;
    }

    .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--color-light-gray);
    }

    a {
        text-decoration: underline;
    }
}

/* ============================================================================
   Accessibility
   ============================================================================ */

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-main:focus {
    top: 0;
}

/* Screen reader only */
.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;
}

/* ============================================================================
   Loading & Animations
   ============================================================================ */

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

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(4, 92, 92, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-large {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

.fade-in {
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================================================
   End of Base CSS
   ============================================================================ */