/**
 * Haleon Design System
 * Based on Haleon Brand Guidelines v3.0
 * Reusable CSS variables and components
 */

:root {
    /* ===== Haleon Brand Colors (Official Brand Palette) ===== */
    
    /* PRIMARY COLORS */
    --haleon-green: #30EA03;           /* Haleon Green - RGB: 48/234/3 - Primary brand color */
    --haleon-green-dark: #28C003;      /* Darker shade for hover/active states */
    --haleon-green-light: #E8FCE5;     /* Light tint for backgrounds and subtle accents */
    --haleon-green-hover: #2AD603;     /* Hover state */
    --haleon-white: #FFFFFF;           /* White - RGB: 255/255/255 */
    --haleon-black: #000000;           /* Black - RGB: 0/0/0 */
    
    /* SECONDARY COLORS (Official Grays) */
    --haleon-gray-dark: #333F48;       /* Dark Grey - RGB: 51/63/72 */
    --haleon-gray-mid: #8D979D;        /* Mid Grey - RGB: 141/151/157 */
    --haleon-gray-light: #D0D3D4;      /* Light Grey - RGB: 208/211/212 */
    
    /* Extended Gray Scale for UI Components */
    --haleon-gray-50: #F5F6F7;         /* Lightest gray for backgrounds */
    --haleon-gray-100: #E8EAEB;        /* Very light gray */
    --haleon-gray-200: #D0D3D4;        /* Light Grey (official) */
    --haleon-gray-300: #B8BCBE;        /* Light-medium gray */
    --haleon-gray-400: #8D979D;        /* Mid Grey (official) */
    --haleon-gray-500: #6B7479;        /* Medium gray */
    --haleon-gray-600: #4D575D;        /* Medium-dark gray */
    --haleon-gray-700: #333F48;        /* Dark Grey (official) */
    --haleon-gray-800: #262F35;        /* Very dark gray */
    --haleon-gray-900: #1A2024;        /* Darkest gray */
    
    /* HIGHLIGHT COLORS */
    --haleon-pink: #FF29FF;            /* Pink - RGB: 255/41/255 */
    --haleon-teal: #00F1FF;            /* Teal - RGB: 0/241/255 */
    --haleon-purple: #AD7BFF;          /* Purple - RGB: 173/123/255 */
    --haleon-yellow: #DCFF00;          /* Yellow - RGB: 220/255/0 */
    
    /* ===== Typography ===== */
    /* Using Verdana as primary (New Hero requires license) */
    --font-primary: 'Verdana', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Verdana', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;
    
    /* Font Weights */
    --font-regular: 400;
    --font-medium: 500;
    --font-bold: 700;
    
    /* ===== Spacing (8px base grid) ===== */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    
    /* ===== Border Radius ===== */
    --radius-sm: 0.125rem;   /* 2px */
    --radius-base: 0.25rem;  /* 4px */
    --radius-md: 0.375rem;   /* 6px */
    --radius-lg: 0.5rem;     /* 8px */
    --radius-xl: 0.75rem;    /* 12px */
    --radius-2xl: 1rem;      /* 16px */
    
    /* ===== Shadows ===== */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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;
    --transition-base: 300ms;
    --transition-slow: 500ms;
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* ===== Grid System ===== */
    --grid-margin: 5%;
    --grid-columns: 12;
}

/* ===== Haleon Baseline (Brand Element) ===== */
.haleon-baseline {
    background-color: var(--haleon-green);
    height: 8px;
    width: 100%;
    position: relative;
}

.haleon-baseline--thick {
    height: 12px;
}

.haleon-baseline--animated {
    animation: baselineSlide 1.36s var(--ease-in-out);
}

@keyframes baselineSlide {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

/* ===== Haleon Logo Styles ===== */
.haleon-logo {
    max-width: 200px;
    height: auto;
    display: block;
}

.haleon-logo--small {
    max-width: 120px;
}

.haleon-logo--large {
    max-width: 280px;
}

.haleon-logo--animated {
    animation: logoFadeIn 2s var(--ease-in-out);
}

@keyframes logoFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Typography Classes ===== */
.haleon-heading-hero {
    font-family: var(--font-primary);
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--haleon-gray-900);
    letter-spacing: -0.02em;
}

.haleon-heading-1 {
    font-family: var(--font-primary);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--haleon-gray-900);
}

.haleon-heading-2 {
    font-family: var(--font-primary);
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--haleon-gray-900);
}

.haleon-heading-3 {
    font-family: var(--font-primary);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-normal);
    color: var(--haleon-gray-900);
}

.haleon-body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--haleon-gray-700);
}

.haleon-body-large {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--haleon-gray-700);
}

.haleon-body-small {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--haleon-gray-600);
}

.haleon-text-muted {
    color: var(--haleon-gray-500);
}

/* ===== Button Styles ===== */
.haleon-btn {
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base) var(--ease-in-out);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    min-height: 36px;
}

.haleon-btn-primary {
    background-color: var(--haleon-green);
    color: var(--haleon-white);
    box-shadow: var(--shadow-sm);
}

.haleon-btn-primary:hover {
    background-color: var(--haleon-green-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.haleon-btn-primary:active {
    background-color: var(--haleon-green-dark);
    transform: translateY(0);
}

.haleon-btn-primary:focus {
    outline: 2px solid var(--haleon-green);
    outline-offset: 2px;
}

.haleon-btn-secondary {
    background-color: var(--haleon-white);
    color: var(--haleon-green);
    border: 2px solid var(--haleon-green);
}

.haleon-btn-secondary:hover {
    background-color: var(--haleon-green-light);
}

/* Text/Link style buttons - like reference design */
.haleon-btn-outline {
    background-color: transparent;
    color: var(--haleon-gray-700);
    border: none;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

.haleon-btn-outline:hover {
    color: var(--haleon-green);
    background-color: var(--haleon-gray-50);
}

.haleon-btn-outline i {
    font-size: 1rem;
}

/* Page Header Styles */
/*.haleon-page-header {
    padding: var(--space-4) 0;
}*/

.haleon-page-title {
    font-family: var(--font-primary);
    font-size: var(--text-xl) !important;
    font-weight: var(--font-bold);
    color: var(--haleon-gray-900);
    margin: 0;
    line-height: 1.3;
}

.haleon-page-subtitle {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--haleon-gray-500);
    margin: 0;
}

.haleon-action-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.haleon-action-buttons .btn {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border: none;
    color: var(--haleon-gray-700);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.haleon-action-buttons .btn:hover {
    color: var(--haleon-green);
}

.haleon-action-buttons .btn i {
    font-size: 1.125rem;
}

/* Link-style action buttons (like reference design) */
.btn-link-action {
    background: transparent !important;
    border: none !important;
    color: var(--haleon-gray-700) !important;
    font-size: 0.875rem !important;
    font-weight: 400 !important;
    padding: 0.375rem 0.75rem !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    text-decoration: none !important;
    transition: color 0.2s ease !important;
}

.btn-link-action:hover {
    color: var(--haleon-green) !important;
    background: transparent !important;
}

.btn-link-action i {
    font-size: 1.125rem !important;
}

.haleon-btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    min-height: 48px;
}

.haleon-btn-full {
    width: 100%;
}

/* ===== Form Styles ===== */
.haleon-form-group {
    margin-bottom: var(--space-6);
}

.haleon-form-label {
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--haleon-gray-700);
    display: block;
    margin-bottom: var(--space-2);
}

.haleon-form-input {
    font-family: var(--font-body);
    font-size: var(--text-base);
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--haleon-gray-300);
    border-radius: var(--radius-lg);
    width: 100%;
    transition: all var(--transition-base) var(--ease-in-out);
    background-color: var(--haleon-white);
    color: var(--haleon-gray-900);
    min-height: 44px; /* WCAG touch target */
}

.haleon-form-input:hover {
    border-color: var(--haleon-gray-400);
}

.haleon-form-input:focus {
    outline: none;
    border-color: var(--haleon-green);
    box-shadow: 0 0 0 3px var(--haleon-green-light);
}

.haleon-form-input::placeholder {
    color: var(--haleon-gray-400);
}

.haleon-form-input.is-invalid {
    border-color: #DC2626;
}

.haleon-form-input.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.haleon-form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--space-10);
}

.haleon-form-error {
    font-size: var(--text-sm);
    color: #DC2626;
    margin-top: var(--space-2);
    display: none;
}

.haleon-form-input.is-invalid ~ .haleon-form-error {
    display: block;
}

.haleon-form-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--haleon-gray-300);
    border-radius: var(--radius-base);
    cursor: pointer;
    accent-color: var(--haleon-green);
}

.haleon-form-checkbox:focus {
    outline: 2px solid var(--haleon-green);
    outline-offset: 2px;
}

/* ===== Card Styles ===== */
.haleon-card {
    background-color: var(--haleon-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-8);
    transition: box-shadow var(--transition-base) var(--ease-in-out);
}

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

.haleon-card--bordered {
    border: 1px solid var(--haleon-gray-200);
    box-shadow: var(--shadow-sm);
}

/* ===== Alert Styles ===== */
.haleon-alert {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.haleon-alert-error {
    background-color: #FEE2E2;
    border-left: 4px solid #DC2626;
    color: #991B1B;
}

.haleon-alert-success {
    background-color: var(--haleon-green-light);
    border-left: 4px solid var(--haleon-green);
    color: var(--haleon-green-dark);
}

.haleon-alert-info {
    background-color: #DBEAFE;
    border-left: 4px solid #3B82F6;
    color: #1E40AF;
}

/* ===== Badge Styles ===== */
.haleon-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-xl);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.haleon-badge-secondary {
    background-color: var(--haleon-gray-200);
    color: var(--haleon-gray-700);
}

.haleon-badge-success {
    background-color: var(--haleon-green-light);
    color: var(--haleon-green-dark);
}

.haleon-badge-info {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.haleon-badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.haleon-badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.haleon-badge-teal {
    background-color: rgba(0, 241, 255, 0.1);
    color: var(--haleon-teal);
}

.haleon-badge-yellow {
    background-color: rgba(220, 255, 0, 0.1);
    color: #B8860B;
}

.haleon-badge-pink {
    background-color: rgba(255, 41, 255, 0.1);
    color: var(--haleon-pink);
}

.haleon-badge-purple {
    background-color: rgba(173, 123, 255, 0.1);
    color: var(--haleon-purple);
}

/* ===== Link Styles ===== */
.haleon-link {
    color: var(--haleon-green);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: color var(--transition-base) var(--ease-in-out);
    position: relative;
}

.haleon-link:hover {
    color: var(--haleon-green-dark);
    text-decoration: underline;
}

.haleon-link:focus {
    outline: 2px solid var(--haleon-green);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===== Utility Classes ===== */
.haleon-text-center {
    text-align: center;
}

.haleon-text-green {
    color: var(--haleon-green);
}

.haleon-bg-green {
    background-color: var(--haleon-green);
}

.haleon-bg-light {
    background-color: var(--haleon-gray-50);
}

.haleon-mt-2 { margin-top: var(--space-2); }
.haleon-mt-4 { margin-top: var(--space-4); }
.haleon-mt-6 { margin-top: var(--space-6); }
.haleon-mt-8 { margin-top: var(--space-8); }

.haleon-mb-2 { margin-bottom: var(--space-2); }
.haleon-mb-4 { margin-bottom: var(--space-4); }
.haleon-mb-6 { margin-bottom: var(--space-6); }
.haleon-mb-8 { margin-bottom: var(--space-8); }

.haleon-p-4 { padding: var(--space-4); }
.haleon-p-6 { padding: var(--space-6); }
.haleon-p-8 { padding: var(--space-8); }

/* ===== Responsive Utilities ===== */
@media (max-width: 640px) {
    .haleon-heading-hero {
        font-size: var(--text-4xl);
    }
    
    .haleon-heading-1 {
        font-size: var(--text-3xl);
    }
    
    .haleon-card {
        padding: var(--space-6);
    }
}

/* ===== Accessibility ===== */
.haleon-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 visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--haleon-green);
    outline-offset: 2px;
}