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

/* ===== CSS Variables ===== */
:root {
    /* Color Palette */
    --color-primary: #833AB4;
    --color-secondary: #FD1D1D;
    --color-accent-1: #F77737;
    --color-accent-2: #FCAF45;
    --color-accent-3: #FFDC80;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #833AB4 0%, #FD1D1D 100%);
    --gradient-secondary: linear-gradient(135deg, #F77737 0%, #FCAF45 100%);
    
    /* Neutral Colors */
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    
    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* 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, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 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);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-nav: 100;
    --z-toast: 1000;
    --z-modal: 2000;
}

/* ===== 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;
    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-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

p {
    margin-bottom: var(--spacing-md);
}

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);
}

/* ===== Header ===== */
.app-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: calc(var(--z-nav) + 1);
}

.app-header .container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.black-bar {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 30px;
background-color: #000000;
z-index: 1001;
}
.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.header-logo {
    max-height: 100px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

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

.header-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.app-header h1 {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-2xl);
}

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

/* ===== Main Content ===== */
main {
    padding: var(--spacing-xl) 0;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

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

/* ===== Cards ===== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

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

.section-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

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

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

.form-group input {
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
    font-family: var(--font-family);
}

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

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

.form-group small {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ===== 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);
    font-family: var(--font-family);
    min-height: 44px;
}

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

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

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

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

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

/* ===== Platform Items ===== */
.platforms-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.platform-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.platform-item:hover {
    border-color: var(--color-primary);
    transform: translateX(4px);
}

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

.platform-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
}

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

.platform-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
}

.stat-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.roas-display {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.roas-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    display: block;
}

.roas-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.comparison-bar {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.comparison-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.comparison-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.comparison-value {
    font-weight: 600;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.status-badge.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.status-badge.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

/* ===== Ranking ===== */
.ranking-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: all var(--transition-base);
}

.ranking-item:hover {
    transform: translateX(4px);
    border-color: var(--color-primary);
}

.ranking-position {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    min-width: 60px;
    text-align: center;
}

.ranking-position.gold { color: #FFD700; }
.ranking-position.silver { color: #C0C0C0; }
.ranking-position.bronze { color: #CD7F32; }

.ranking-info {
    flex: 1;
}

.ranking-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.ranking-roas {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

/* ===== Optimization ===== */
.optimization-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.optimization-summary {
    background: var(--gradient-secondary);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.optimization-summary h3 {
    margin-bottom: var(--spacing-md);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.summary-stat {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.summary-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    display: block;
}

.summary-stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

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

.suggestion-item {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    border-left: 4px solid var(--color-info);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.suggestion-item.positive {
    border-left-color: var(--color-success);
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.suggestion-item.negative {
    border-left-color: var(--color-error);
    background: linear-gradient(135deg, #fef2f2 0%, #ffffff 100%);
}

.suggestion-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.faq-item {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

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

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

.faq-question:hover {
    background-color: #f8f9fa;
}

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

.faq-icon {
    font-size: var(--font-size-2xl);
    font-weight: 400;
    transition: transform var(--transition-base);
}

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

.faq-answer {
    padding: var(--spacing-lg);
    background: #f8f9fa;
    animation: slideDown var(--transition-base);
}

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

@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) var(--spacing-lg);
    color: var(--color-text-light);
}

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

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

/* ===== Bottom Navigation ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    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: all var(--transition-fast);
    flex: 1;
    min-height: 44px;
    justify-content: center;
}

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

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

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

.nav-item.active {
    font-weight: 600;
}

/* ===== Footer ===== */
.app-footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-xxl);
    margin-bottom: 60px;
}

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

.app-footer a {
    color: var(--color-accent-3);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.app-footer a:hover {
    color: white;
    text-decoration: underline;
}

.b20-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ===== Toast Notifications ===== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-toast);
    transform: translateX(400px);
    transition: transform var(--transition-base);
    max-width: 300px;
    border-left: 4px solid var(--color-info);
}

.toast.show {
    transform: translateX(0);
}

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

.toast.error {
    border-left-color: var(--color-error);
}

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

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1.125rem;
    }
    
    .app-header {
        padding: var(--spacing-md) 0;
    }
    
    .header-logo {
        max-height: 80px;
    }
    
    .header-content {
        gap: var(--spacing-sm);
    }
    
    .app-header h1 {
        font-size: var(--font-size-xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .platform-stats {
        grid-template-columns: 1fr;
    }
    
    .ranking-position {
        min-width: 40px;
        font-size: var(--font-size-2xl);
    }
    
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .toast {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: var(--spacing-sm) 0;
    }
    
    .header-logo {
        max-height: 60px;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .app-header h1 {
        font-size: var(--font-size-lg);
    }
    
    .app-header .subtitle {
        font-size: var(--font-size-base);
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .platform-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .nav-item span {
        font-size: 0.75rem;
    }
}

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

/* ===== Print Styles ===== */
@media print {
    .bottom-nav,
    .app-footer,
    .platform-actions,
    .btn {
        display: none;
    }
    
    .card {
        break-inside: avoid;
    }
}