/**
 * Gerador de Subject Lines
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Instagram Gradient Palette */
    --primary-color: #833AB4;
    --secondary-color: #FD1D1D;
    --accent-1: #F77737;
    --accent-2: #FCAF45;
    --accent-3: #FFDC80;
    
    /* Gradient */
    --gradient-primary: linear-gradient(135deg, #833AB4 0%, #FD1D1D 50%, #FCAF45 100%);
    --gradient-secondary: linear-gradient(135deg, #F77737 0%, #FCAF45 100%);
    
    /* Neutral Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #E9ECEF;
    --text-primary: #212529;
    --text-secondary: #6C757D;
    --text-light: #ADB5BD;
    --border-color: #DEE2E6;
    
    /* Status Colors */
    --success-color: #28A745;
    --warning-color: #FFC107;
    --danger-color: #DC3545;
    --info-color: #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: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-toast: 1060;
}

/* ===== 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(--text-primary);
    background-color: var(--bg-secondary);
    padding-bottom: 80px;
    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); }

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

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

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

/* ===== Header ===== */
.app-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
}

.app-title {
    font-size: var(--font-size-xxxl);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.app-logo {
    height: 52px;
    width: auto;
    object-fit: contain;
}

.app-title-text {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-title-text::after {
    content: '';
    display: inline-block;
    width: 2px;
    height: 32px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-full);
    margin-left: var(--spacing-sm);
}

.app-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.95;
    font-weight: 400;
}

/* ===== Sections ===== */
.section {
    display: none;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-md);
    animation: fadeIn var(--transition-base);
}

.section.active {
    display: block;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

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

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    background-color: var(--bg-primary);
}

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

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

.error-message {
    display: block;
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    min-height: 1.2em;
}

.form-input.error,
.form-select.error {
    border-color: var(--danger-color);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
}

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

.btn-danger:hover:not(:disabled) {
    background: #c82333;
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

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

/* ===== Results ===== */
.generated-results {
    margin-top: var(--spacing-xxl);
}

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

.results-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.result-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.result-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

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

.result-subject {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    word-break: break-word;
}

.result-score {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.result-score.excellent {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.result-score.good {
    background: rgba(255, 193, 7, 0.1);
    color: var(--warning-color);
}

.result-score.poor {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.result-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.result-ab {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-2);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.result-ab-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.result-ab-text {
    color: var(--text-primary);
}

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

/* ===== Filter Bar ===== */
.filter-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .filter-bar {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

/* ===== History ===== */
.history-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

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

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

.history-subject {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    word-break: break-word;
}

.history-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

/* ===== Statistics ===== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xxl);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

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

.category-breakdown {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.breakdown-title {
    margin-bottom: var(--spacing-lg);
}

.breakdown-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.breakdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.breakdown-label {
    flex: 0 0 150px;
    font-weight: 600;
}

.breakdown-bar {
    flex: 1;
    height: 30px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.breakdown-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--spacing-md);
    color: white;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

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

.faq-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-fast);
}

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

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

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

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

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
    animation: slideDown var(--transition-base);
}

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

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

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

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

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

/* ===== Bottom Navigation ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: var(--z-fixed);
}

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

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

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary-color);
    background: rgba(131, 58, 180, 0.1);
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xxl);
    background: var(--bg-primary);
    border-top: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.app-footer p {
    margin-bottom: var(--spacing-xs);
}

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

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

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 100px;
    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);
    pointer-events: none;
    max-width: 90%;
    text-align: center;
}

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

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

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

.toast.warning {
    background: var(--warning-color);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal:not([hidden]) {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn var(--transition-base);
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.modal-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.preview-client {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.preview-client-name {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.preview-client-subject {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    word-break: break-word;
}

/* ===== Accessibility ===== */
.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 {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .app-title {
        font-size: var(--font-size-xxl);
    }
    
    .section {
        padding: var(--spacing-lg);
        margin: var(--spacing-lg) 0;
    }
    
    .result-header,
    .history-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .result-score {
        align-self: flex-start;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .breakdown-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .breakdown-label {
        flex: none;
    }
    
    .breakdown-bar {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .result-actions,
    .history-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ===== Print Styles ===== */
@media print {
    .bottom-nav,
    .app-footer,
    .result-actions,
    .history-actions,
    .section-actions {
        display: none;
    }
    
    .section {
        display: block;
        page-break-inside: avoid;
    }
}