/* Accessible & Welcoming Light-Theme Design System for Template Kiosk */

:root {
    /* Color Palette - Meets WCAG AA contrast requirements */
    --bg-primary: #f8fafc; /* Friendly, soft light slate */
    --bg-secondary: #ffffff; /* Pure white for cards & containers */
    --bg-accent-light: #f0fdf4; /* Light green accent background */
    --border-color: #cbd5e1; /* Clear visible borders */
    
    /* Text colors with high contrast (ratio > 4.5:1) */
    --text-primary: #0f172a; /* Near-black slate for headings */
    --text-secondary: #334155; /* Deep slate for body text */
    --text-muted: #475569; /* Dark gray for secondary details */
    
    /* Focus & Accents */
    --accent-primary: #059669; /* Warm Emerald Green - welcoming and fresh */
    --accent-hover: #047857; /* Darker emerald for high contrast on hover */
    --accent-secondary: #2563eb; /* Trustworthy Royal Blue */
    --accent-secondary-hover: #1d4ed8;
    
    /* Status Colors */
    --success: #15803d; /* Dark green for success messages */
    --success-bg: #f0fdf4;
    --error: #b91c1c; /* Dark red for error states */
    --error-bg: #fef2f2;
    --warning: #b45309; /* Accessible amber/orange */
    --warning-bg: #fffbeb;
    
    /* Spacing & Sizes - Optimized for touch & readability */
    --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-size-base: 1.125rem; /* 18px base size for improved legibility */
    --line-height-base: 1.6;
    
    --transition-smooth: all 0.2s ease-in-out;
}

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

/* Accessibility: Support users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-delay: 0s !important;
        animation-duration: 0s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0s !important;
        scroll-behavior: auto !important;
    }
}

body {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Accessibility: Skip to main content link support (for screen readers/keyboard users) */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-secondary);
    color: white;
    padding: 8px;
    z-index: 100;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
}

/* Custom Scrollbar for better visibility */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 5px;
    border: 2px solid #f1f5f9;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Main Container */
main.container {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

/* Accessibility: Consistent focus rings */
a:focus-visible, 
button:focus-visible, 
input:focus-visible, 
textarea:focus-visible,
select:focus-visible {
    outline: 3px solid var(--accent-secondary);
    outline-offset: 3px;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.85rem;
    margin-bottom: 1.25rem;
}

h3 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1.5rem;
}

a {
    color: var(--accent-secondary);
    text-decoration: underline;
    font-weight: 500;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--accent-secondary-hover);
    text-decoration: none;
}

/* Header & Navigation */
header.header {
    background: var(--bg-secondary);
    border-bottom: 2px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
    width: 100%;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-link:hover {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    gap: 1.25rem;
    list-style: none;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    text-decoration: none;
    border-bottom: 2px solid transparent;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background-color: #f1f5f9;
}

/* Large interactive button for better hit target (accessibility) */
.btn-nav-login {
    background-color: var(--accent-primary);
    color: white !important;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px; /* Safe touch target */
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
}

.btn-nav-login:hover {
    background-color: var(--accent-hover);
    color: white !important;
}

/* Friendly Accessible Cards */
.card {
    background: var(--bg-secondary);
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 2.25rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: #cbd5e1;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

/* Form Styles - optimized for accessibility */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid #cbd5e1;
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-smooth);
    min-height: 48px; /* Safe touch size */
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-secondary);
}

/* Accessible Inputs validation borders */
.form-control:invalid:focus {
    border-color: var(--error);
}

/* Accessible Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.75rem;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
    text-decoration: none;
    min-height: 48px; /* Accessible standard */
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
    box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

.btn-secondary {
    background-color: #f1f5f9;
    color: var(--text-primary);
    border: 2px solid #cbd5e1;
}

.btn-secondary:hover {
    background-color: #e2e8f0;
    border-color: #94a3b8;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }
    .nav-container {
        flex-direction: column;
        gap: 1.25rem;
    }
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Footer */
footer.footer {
    background: var(--bg-secondary);
    border-top: 2px solid #e2e8f0;
    padding: 3rem 1.5rem;
    margin-top: auto;
    font-size: 1rem;
    color: var(--text-muted);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: underline;
}

.footer-links a:hover {
    color: var(--accent-secondary);
}

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    .footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }
}