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

:root {
    /* Color Palette */
    --primary: #833AB4;
    --secondary: #FD1D1D;
    --accent-1: #F77737;
    --accent-2: #FCAF45;
    --accent-3: #FFDC80;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #833AB4 0%, #FD1D1D 50%, #FCAF45 100%);
    --gradient-card: linear-gradient(135deg, rgba(131, 58, 180, 0.05) 0%, rgba(253, 29, 29, 0.05) 100%);
    
    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-light: #adb5bd;
    --border-color: #dee2e6;
    
    /* Semantic Colors */
    --success: #28a745;
    --error: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    
    /* 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-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    --font-size-xxxl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-toast: 1050;
    
    /* Bottom Nav Height */
    --bottom-nav-height: 60px;
}

/* Reset & Base Styles */
* {
    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(--text-primary);
    background: var(--bg-secondary);
    padding-top: 140px;
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    min-height: 100vh;
}

/* 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-xxxl); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

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

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

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

/* Main Content */
main {
    position: relative;
    z-index: 1;
    margin-bottom: calc(var(--bottom-nav-height) + var(--spacing-xl));
}
.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}
/* Header */
.app-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md) 0;
    text-align: center;
    box-shadow: var(--shadow-md);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
}

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

.header-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

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

.header-text {
    text-align: left;
    flex: 1;
    max-width: 600px;
}

.app-header h1 {
    margin-bottom: var(--spacing-xs);
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-header .subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.95;
    margin: 0;
}

/* Sections */
.section {
    display: none;
    animation: fadeIn var(--transition-base);
}

.section.active {
    display: block;
}

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

/* Cards */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

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

/* Forms */
.generator-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.required {
    color: var(--error);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(131, 58, 180, 0.1);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group select:invalid:not(:placeholder-shown) {
    border-color: var(--error);
}

.help-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.error-message {
    font-size: var(--font-size-sm);
    color: var(--error);
    display: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(220, 53, 69, 0.1);
    border-radius: var(--radius-sm);
}

.error-message.show {
    display: block;
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    min-height: 44px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-icon {
    padding: var(--spacing-sm);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-generate {
    width: 100%;
    font-size: var(--font-size-lg);
    padding: var(--spacing-lg);
}

/* Results */
.results-container {
    animation: slideUp var(--transition-base);
}

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

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

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

.results-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.char-count {
    background: var(--gradient-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
}

.char-limit {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: var(--font-size-sm);
}

.hashtags-display {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.hashtag-group {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.group-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.hashtag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.hashtag-tag {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
}

.hashtag-tag:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.hashtag-tag.popular {
    background: linear-gradient(135deg, rgba(253, 29, 29, 0.1), rgba(247, 119, 55, 0.1));
    border-color: var(--secondary);
}

.hashtag-tag.niche {
    background: linear-gradient(135deg, rgba(131, 58, 180, 0.1), rgba(252, 175, 69, 0.1));
    border-color: var(--primary);
}

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

.formatted-output label {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.formatted-output textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    resize: vertical;
    background: var(--bg-secondary);
}

/* History & Favorites */
.history-list,
.favorites-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item,
.favorite-item {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.history-item:hover,
.favorite-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

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

.item-info {
    flex: 1;
}

.item-keyword {
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.item-niche {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.item-date {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

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

.item-hashtags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.item-hashtags .hashtag-tag {
    font-size: var(--font-size-xs);
    padding: 2px var(--spacing-sm);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state p {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

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

/* FAQ */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: none;
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
    min-height: 44px;
}

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

.faq-question[aria-expanded="true"] {
    background: var(--primary);
    color: white;
}

.faq-icon {
    transition: transform var(--transition-fast);
    font-size: var(--font-size-lg);
}

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

.faq-answer {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-answer:not([hidden]) {
    padding: var(--spacing-lg);
    max-height: 500px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: stretch;
    z-index: 9999;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 80px;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    flex: 1 1 0;
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(131, 58, 180, 0.2);
    touch-action: manipulation;
    user-select: none;
}

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

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

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

.nav-item.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-item.active i {
    transform: scale(1.1);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-toast);
    opacity: 0;
    transition: all var(--transition-base);
    max-width: 90%;
    text-align: center;
}

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

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--error);
}

/* Footer */
.app-footer {
    background: var(--bg-tertiary);
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-xxl);
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
    margin-bottom:60px;
}

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

.b20-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.b20-link:hover {
    text-decoration: underline;
    transform: scale(1.05);
    display: inline-block;
}

/* 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 */
@media (max-width: 767px) {
    body {
        padding-top: 100px;
    }
    
    .header-content {
        gap: var(--spacing-sm);
        justify-content: center;
    }
    
    .header-text {
        text-align: left;
        flex: 1;
    }
    
    .app-header h1 {
        justify-content: flex-start;
        font-size: clamp(1rem, 4vw, 1.3rem);
    }
    
    .app-header .subtitle {
        font-size: var(--font-size-xs);
    }
    
    .header-logo {
        width: 60px;
        height: 60px;
    }
    
    /* Garantir que bottom-nav seja clicável no mobile */
    .bottom-nav {
        display: flex !important;
    }
    
    .nav-item {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
    }
}

@media (min-width: 768px) {
    body {
        padding-top: 120px;
    }
    
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .card {
        padding: var(--spacing-xxl);
    }
    
    .hashtags-display {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-header {
        flex-wrap: nowrap;
    }
    
    .header-logo {
        width: 90px;
        height: 90px;
    }
    
    .header-content {
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    body {
        padding-top: 130px;
        padding-bottom: 0;
    }
    
    .header-logo {
        width: 100px;
        height: 100px;
    }
    
    .bottom-nav {
        display: none;
    }
    
    .section {
        display: block;
    }
    
    .toast {
        bottom: var(--spacing-xl);
    }
}

/* Print Styles */
@media print {
    .bottom-nav,
    .app-header,
    .app-footer,
    .results-actions,
    .item-actions {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* Dark Mode Support (Future Enhancement) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --bg-tertiary: #3a3a3a;
        --text-primary: #ffffff;
        --text-secondary: #b0b0b0;
        --text-light: #808080;
        --border-color: #404040;
    }
}

/* Accessibility: High Contrast Mode */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .card {
        border: 2px solid var(--border-color);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}