/**
 * Gerador de Patterns - Stylesheet
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===== CSS Variables ===== */
:root {
    /* Color Palette */
    --color-primary: #833AB4;
    --color-secondary: #FD1D1D;
    --color-tertiary: #F77737;
    --color-accent: #FCAF45;
    --color-light: #FFDC80;
    
    /* Neutral Colors */
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-text: #2c3e50;
    --color-text-light: #6c757d;
    --color-border: #dee2e6;
    --color-shadow: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 1000;
    --z-modal: 1050;
    --z-toast: 1100;
    --z-nav: 900;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    padding-bottom: 80px;
    padding-top: 150px;
}

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

h1 { font-size: var(--font-size-xxl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

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

a:hover {
    color: var(--color-secondary);
}

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

.section {
    display: none;
    padding: var(--spacing-lg) 0;
    animation: fadeIn var(--transition-base);
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}

/* ===== Header ===== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: 0 2px 8px var(--color-shadow);
    z-index: var(--z-header);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.header-logo {
    height: 90px;
    width: auto;
    max-width: 300px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    transition: transform var(--transition-fast);
}

.header-logo:hover {
    transform: scale(1.05);
}

.header-text {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.app-header h1 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xxl);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.app-header .subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* ===== Pattern Studio ===== */
.pattern-studio {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Canvas Container */
.canvas-container {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px var(--color-shadow);
    overflow: hidden;
    aspect-ratio: 4/3;
}

#patternCanvas {
    width: 100%;
    height: 100%;
    display: block;
}

.canvas-overlay {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
}

/* Controls Panel */
.controls-panel {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.controls-panel h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

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

.control-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* Form Controls */
.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color var(--transition-fast);
}

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

select.form-control {
    cursor: pointer;
    background-color: white;
}

/* Color Input Group */
.color-input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.color-picker {
    width: 60px;
    height: 44px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.color-picker:hover {
    transform: scale(1.05);
}

.color-text {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: monospace;
    text-transform: uppercase;
}

/* Slider */
.slider {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-sm);
    background: var(--color-border);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px;
}

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

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--color-shadow);
}

.btn-secondary {
    background: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-text-light);
    color: white;
}

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

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

.icon-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: white;
    transform: scale(1.1);
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.export-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* CSS Code Container */
.css-code-container {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
    margin-top: var(--spacing-lg);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.code-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
}

.code-block {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

/* Saved Patterns Grid */
.saved-patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-sm);
}

.pattern-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 2px 6px var(--color-shadow);
    transition: transform var(--transition-fast);
    cursor: pointer;
}

.pattern-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 12px var(--color-shadow);
}

.pattern-preview {
    width: 100%;
    height: 80px;
    background-size: cover;
}

.pattern-info {
    padding: var(--spacing-xs) var(--spacing-sm);
}

.pattern-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}

.pattern-meta {
    font-size: 0.7rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}

.pattern-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.pattern-actions .btn {
    flex: 1;
    padding: var(--spacing-xs);
    font-size: 0.7rem;
    min-height: 28px;
}

.pattern-actions .btn i {
    font-size: 0.75rem;
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xxl);
    color: var(--color-text-light);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.empty-state .hint {
    font-size: var(--font-size-sm);
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px var(--color-shadow);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-bg);
}

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-light);
}

.faq-answer[hidden] {
    display: none;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.features-list,
.tech-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.features-list li,
.tech-list li {
    padding: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.tech-list i {
    font-size: var(--font-size-lg);
    color: var(--color-accent);
}

.version-info {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-border);
    color: var(--color-text-light);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 8px var(--color-shadow);
    z-index: var(--z-nav);
    margin-bottom: 80px;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: var(--color-text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
    min-width: 60px;
}

.nav-item i {
    font-size: var(--font-size-lg);
}

.nav-item span {
    font-size: var(--font-size-sm);
}

.nav-item.active {
    color: var(--color-primary);
}

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

/* Footer */
.app-footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-surface);
    margin-top: var(--spacing-xxl);
    border-top: 2px solid var(--color-border);
    margin-bottom: 60px;
}

.app-footer p {
    margin: var(--spacing-xs) 0;
    color: var(--color-text-light);
}

.b20-link {
    color: var(--color-primary);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.b20-link:hover {
    color: var(--color-secondary);
    transform: scale(1.05);
    display: inline-block;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px var(--color-shadow);
    z-index: var(--z-toast);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: #28a745;
}

.toast.error {
    background: #dc3545;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    box-shadow: 0 8px 24px var(--color-shadow);
    animation: modalSlideIn var(--transition-base);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--color-border);
}

.modal-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text);
}

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

.modal-body label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-top: 2px solid var(--color-border);
}

/* 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;
}

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

/* Mobile (< 768px) */
@media (max-width: 767px) {
    body {
        padding-top: 170px;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .header-logo {
        height: 70px;
        max-width: 200px;
    }
    
    .app-header h1 {
        font-size: var(--font-size-xl);
    }
    
    .app-header {
        padding: var(--spacing-md) 0;
    }
    
    #fullscreenBtn {
        display: none;
    }
}

/* Tablet (768px+) */
@media (min-width: 768px) {
    .pattern-studio {
        grid-template-columns: 1fr 400px;
    }
    
    .export-buttons {
        flex-direction: row;
    }
    
    .export-buttons .btn {
        flex: 1;
    }
    
    .header-logo {
        height: 100px;
        max-width: 350px;
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .pattern-studio {
        grid-template-columns: 1fr 450px;
    }
    
    .saved-patterns-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-md);
    }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
}

/* Print Styles */
@media print {
    .bottom-nav,
    .app-footer,
    .controls-panel,
    .export-buttons {
        display: none;
    }
}