/* QR Code Generator - Complete CSS Styling */
/* Based on provided color palette with consistent UI styling */

/* 1. COLOR VARIABLES (CSS Custom Properties) */
:root {
 /* New Primary Colors */
 --cornflower-ocean: #0e6ba8ff; /* Deep professional blue */
 --red: #ff101fff; /* Vibrant attention red */
 --white: #ffffffff; /* Pure white */
 --space-indigo: #171738ff; /* Dark sophisticated indigo */
 --sunflower-gold: #edb230ff; /* Warm accent gold */

 /* Semantic Colors (based on new palette) */
 --color-primary: var(--cornflower-ocean); /* Main brand color */
 --color-secondary: var(--space-indigo); /* Secondary dark color */
 --color-accent: var(--sunflower-gold); /* Accent/warning color */
 --color-alert: var(--red); /* Alert/attention color */
 --color-dark: var(--space-indigo); /* Dark elements */
 --color-light: var(--white); /* Light elements */

 /* Text Colors */
 --color-text: var(--space-indigo); /* Main text color */
 --color-text-light: #4a4a6d; /* Light text (derived from space-indigo) */
 --color-text-inverse: var(--white); /* Text on dark backgrounds */
 --color-background: var(--white); /* Main background */
 --color-background-alt: #f5f7fa; /* Alternate background (light blue-grey) */
 --color-border: #d1d9e6; /* Border color */

 /* Gradients (using new palette) */
 --gradient-primary: linear-gradient(135deg, var(--cornflower-ocean) 0%, var(--space-indigo) 100%);
 --gradient-accent: linear-gradient(135deg, var(--sunflower-gold) 0%, var(--red) 100%);
 --gradient-light: linear-gradient(135deg, #e6ecf5 0%, var(--white) 100%);
 --gradient-dark: linear-gradient(135deg, var(--space-indigo) 0%, #0a0a1a 100%);
 --gradient-ocean: linear-gradient(135deg, var(--cornflower-ocean) 0%, #0a4d8c 100%);

 /* Shadows (updated for new colors) */
 --shadow-sm: 0 2px 8px rgba(14, 107, 168, 0.1);
 --shadow-md: 0 4px 16px rgba(14, 107, 168, 0.15);
 --shadow-lg: 0 8px 32px rgba(14, 107, 168, 0.2);
 --shadow-accent: 0 4px 16px rgba(237, 178, 48, 0.2);
 --shadow-alert: 0 4px 16px rgba(255, 16, 31, 0.2);

 /* Transitions */
 --transition-fast: 0.2s ease;
 --transition-normal: 0.3s ease;
 --transition-slow: 0.5s ease;
 
 /* Font Weights */
 --font-weight-light: 300;
 --font-weight-regular: 400;
 --font-weight-medium: 500;
 --font-weight-semibold: 600;
 --font-weight-bold: 700;
 --font-weight-extrabold: 800;
 
 /* Layout */
 --border-radius: 12px;
 --border-radius-sm: 8px;
 --border-radius-lg: 16px;
}

/* 2. BASE STYLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--gradient-primary);
    min-height: 100vh;
    padding: 20px;
}

/* 3. LAYOUT CONTAINERS */
.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Ensure all main containers have consistent width */
.header,
.main-content .card,
.footer {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

/* 4. HEADER STYLES */
.header {
    background: var(--color-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* 5. BREADCRUMBS */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--color-background);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumb-item:hover {
    color: var(--color-primary);
}

.breadcrumb-item.current {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

/* Remove underline from breadcrumb links */
.breadcrumbs a {
    text-decoration: none;
    color: var(--color-text-light);
    transition: var(--transition-fast);
}

.breadcrumbs a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--color-border);
}

/* 6. MAIN CONTENT */
.main-content {
    margin-bottom: 2rem;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 992px) {
    .content-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.content-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* 7. CARD STYLES */
.card {
    background: var(--color-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.card h2 i {
    color: var(--color-primary);
}

.card p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

/* 8. FORM ELEMENTS - CONSISTENT STYLING */

/* Labels */
.setting label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.setting label i {
    color: var(--color-primary);
}

/* Text Inputs */
.setting input[type="text"],
.setting select,
.setting input[type="color"] {
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition-normal);
    background: var(--color-background-alt);
    color: var(--color-text);
    width: 100%;
    font-family: inherit;
}

.setting input[type="text"]:focus,
.setting select:focus,
.setting input[type="color"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 107, 168, 0.1);
}

/* Color Picker Specific */
.setting input[type="color"] {
    width: 60px;
    height: 50px;
    padding: 0.25rem;
    cursor: pointer;
}

/* Select Dropdown */
.setting select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%234a4a6d' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
    padding-right: 3rem;
}

/* Hint Text */
.hint {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
    margin-bottom: 1.5rem;
}

/* 9. BUTTONS - CONSISTENT STYLING */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
}

/* Primary Button */
.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Secondary Button */
.btn-secondary {
    background: var(--color-background-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Disabled State */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Action Buttons */
.action-buttons {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

/* 10. RESULT DISPLAY */
.result-section {
    margin-top: 2rem;
}

.result-section h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.result-section h3 i {
    color: var(--color-primary);
}

.qr-display {
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
    border: 2px dashed var(--color-border);
}

.qr-placeholder {
    color: var(--color-text-light);
}

.qr-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--color-border);
}

.qr-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 11. FEATURES & TIPS */
.features, .tips {
    margin-top: 1.5rem;
}

.features h3, .tips h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--color-text);
}

.features h3 i {
    color: var(--success-color);
}

.tips h3 i {
    color: var(--color-accent);
}

.features ul, .tips ul {
    list-style: none;
    padding-left: 0;
}

.features li, .tips li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-light);
}

.features li i {
    color: var(--success-color);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.tips li i {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

/* 12. FOOTER */
.footer {
    background: var(--color-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.copyright {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

.copyright i {
    color: var(--color-primary);
}

.version {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.version i {
    color: var(--color-primary);
    margin-right: 0.25rem;
}

/* 13. UTILITY CLASSES */
.hidden {
    display: none !important;
}

/* 14. RESPONSIVE DESIGN */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    .header {
        padding: 1.5rem;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .qr-actions {
        flex-direction: column;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}

/* 15. ACCESSIBILITY */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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