/* ===== DESIGN SYSTEM - SOFISTICADO E MINIMALISTA ===== */

/* Variáveis CSS para Temas */
:root {
    /* Tema Padrão - Profissional Corporativo */
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --accent: #64748b;
    --accent-light: #94a3b8;
    --accent-dark: #475569;
    
    --success: #059669;
    --success-light: #10b981;
    --success-dark: #047857;
    --warning: #d97706;
    --warning-light: #f59e0b;
    --warning-dark: #b45309;
    --error: #dc2626;
    --error-light: #ef4444;
    --error-dark: #b91c1c;
    
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --divider: #e2e8f0;
    
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.20);
    
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
}

/* Tema Verde Profissional */
[data-theme="nature"] {
    --primary: #065f46;
    --primary-light: #047857;
    --primary-dark: #064e3b;
    --accent: #6b7280;
    --accent-light: #9ca3af;
    --accent-dark: #4b5563;
    
    --background: #f0fdf4;
    --surface: #ffffff;
    --surface-hover: #ecfdf5;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: #bbf7d0;
    --border-hover: #86efac;
    --divider: #dcfce7;
}

/* Tema Roxo Profissional */
[data-theme="elegant"] {
    --primary: #581c87;
    --primary-light: #7c3aed;
    --primary-dark: #4c1d95;
    --accent: #6b7280;
    --accent-light: #9ca3af;
    --accent-dark: #4b5563;
    
    --background: #faf5ff;
    --surface: #ffffff;
    --surface-hover: #f3e8ff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: #c4b5fd;
    --border-hover: #a78bfa;
    --divider: #ede9fe;
}

/* Tema Escuro Profissional */
[data-theme="dark"] {
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --accent: #6b7280;
    --accent-light: #9ca3af;
    --accent-dark: #4b5563;
    
    --background: #0f172a;
    --surface: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border: #334155;
    --border-hover: #475569;
    --divider: #334155;
    
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.7);
}

/* ===== RESET E BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    margin-bottom: 90px;
}

body {
    font-family: var(--font-sans);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition-normal);
}

/* ===== TIPOGRAFIA ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

/* ===== HEADER ===== */
.app-header {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
    margin-top: 0;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.header-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
   
    max-width: 1200px;
    margin: 0 auto;
   
}

.header-logo {
    margin-top: 1.3rem;
  
}



.logo-img {
    height: 64px;
    width: auto;
   
    transition: all var(--transition-normal);
    opacity: 0.9;
}

.logo-img:hover {
    opacity: 1;
    transform: scale(1.05);
   
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    text-align: center;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
    color: white;
}

/* ===== CONTROLES DE TEMA E IDIOMA ===== */
.theme-controls {
    position: absolute;
    margin-top: 1.3rem;
    margin-bottom: 1.3rem;
    top: var(--spacing-2xl);
    right: var(--spacing-lg);
    z-index: 10;
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.theme-controls:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.controls-logo {
    display: none;
}

.theme-selector,
.language-selector {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    min-width: 80px;
    backdrop-filter: blur(5px);
}

.theme-selector:hover,
.language-selector:hover {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.1);
}

.theme-selector:focus,
.language-selector:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.theme-selector option,
.language-selector option {
    background: var(--surface);
    color: var(--text-primary);
}

/* ===== MAIN CONTENT ===== */
.app-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    padding-bottom: calc(var(--spacing-2xl) + 80px); /* Espaço para o nav-bottom */
}

.container {
    width: 100%;
}

.section {
    display: none;
    animation: fadeInUp 0.6s ease-out;
}

.section.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== CARDS ===== */
.search-card,
.product-card,
.simulation-card,
.history-card,
.faq-card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.search-card::before,
.product-card::before,
.simulation-card::before,
.history-card::before,
.faq-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.search-card:hover::before,
.product-card:hover::before,
.simulation-card:hover::before,
.history-card:hover::before,
.faq-card:hover::before {
    opacity: 1;
}

.search-card:hover,
.product-card:hover,
.simulation-card:hover,
.history-card:hover,
.faq-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
}

.search-card h2,
.simulation-card h2,
.history-card h2,
.faq-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.search-card h2::after,
.simulation-card h2::after,
.history-card h2::after,
.faq-card h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-xs);
}

/* ===== FORMULÁRIOS ===== */
.search-form {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    width: 100%;
}

.search-form input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    background: var(--surface);
    color: var(--text-primary);
}

.search-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    background: var(--surface);
}

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

/* ===== BOTÕES ===== */
.btn-primary,
.btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-normal);
}

.btn-primary:hover::before {
    left: 100%;
}

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

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 2px solid var(--border);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== RESULTADOS DE BUSCA ===== */
.search-results {
    max-height: 400px;
    overflow-y: auto;
    border-radius: var(--radius-lg);
}

.result-item {
    padding: var(--spacing-lg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--surface);
    position: relative;
    overflow: hidden;
}

.result-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    transition: all var(--transition-fast);
}

.result-item:hover {
    background: var(--surface-hover);
    border-color: var(--accent);
    transform: translateX(4px);
}

.result-item.monofasico::before {
    background: var(--success);
}

.result-item.not-monofasico::before {
    background: var(--error);
}

.result-item.monofasico {
    border-left: 3px solid var(--success);
    background: linear-gradient(90deg, rgba(39, 174, 96, 0.05), transparent);
}

.result-item.not-monofasico {
    border-left: 3px solid var(--error);
    background: linear-gradient(90deg, rgba(231, 76, 60, 0.05), transparent);
}

.result-ncm {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
    font-family: var(--font-mono);
}

.result-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.result-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-sans);
}

.status-monofasico {
    background: var(--success);
    color: white;
    box-shadow: var(--shadow-xs);
}

.status-not-monofasico {
    background: var(--error);
    color: white;
    box-shadow: var(--shadow-xs);
}

/* ===== PRODUTO ===== */
.product-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.3rem;
    position: relative;
}

.product-info {
    background: var(--surface-hover);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border);
}

.product-info h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.product-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.calculation-section h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

/* ===== FORMULÁRIOS DE CÁLCULO ===== */
.calc-form,
.simulation-form {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    background: var(--surface);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

/* ===== RESULTADOS ===== */
.calc-result,
.simulation-result {
    background: linear-gradient(135deg, var(--surface-hover), var(--surface));
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--divider);
    transition: all var(--transition-fast);
}

.result-row:hover {
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin: 0 calc(-1 * var(--spacing-md)) var(--spacing-md) calc(-1 * var(--spacing-md));
}

.result-row:last-child {
    margin-bottom: 0;
    border-bottom: none;
    font-weight: 600;
    font-size: 1.1rem;
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--primary);
}

.result-label {
    color: var(--text-primary);
    font-weight: 500;
}

.result-value {
    font-weight: 600;
    color: var(--primary);
    font-family: var(--font-mono);
}

.result-value.positive {
    color: var(--success);
}

.result-value.negative {
    color: var(--error);
}

/* ===== HISTÓRICO ===== */
.history-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    align-items: center;
}

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

.export-buttons .btn-secondary,
.export-buttons .btn-primary {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    min-width: 80px;
}

.history-list {
    max-height: 500px;
    overflow-y: auto;
    border-radius: var(--radius-lg);
}

.history-item {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    border: 1px solid var(--border);
}

.history-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

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

.history-item-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.history-item-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--surface-hover);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.history-item-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

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

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-xl);
    background: var(--surface);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

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

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

.faq-icon {
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform var(--transition-normal);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    font-family: var(--font-mono);
}

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

.faq-answer {
    padding: var(--spacing-xl);
    background: var(--surface);
    border-top: 1px solid var(--border);
    animation: slideDown var(--transition-normal);
    line-height: 1.6;
    color: var(--text-secondary);
}

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

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        max-height: 300px;
        transform: translateY(0);
    }
}

/* ===== NAVEGAÇÃO INFERIOR ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    border-top: 1px solid var(--border);
    backdrop-filter: blur(10px);
    height: 80px; /* Altura fixa para consistência */
   
}

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

.nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-fast);
    border-radius: var(--radius-xs);
}

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

.nav-item.active::before {
    width: 80%;
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

/* ===== FOOTER ===== */
footer {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
    
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    height: 40px;
    width: auto;
  
    opacity: 0.8;
    transition: all var(--transition-normal);
}

.footer-logo:hover {
    opacity: 1;
    transform: scale(1.05);
}

.footer-text {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.9;
    color: white;
}

.footer-disclaimer {
    color: var(--warning-light);
    font-size: 0.75rem;
    margin: var(--spacing-xs) 0 0 0;
    text-align: center;
    font-weight: 500;
    opacity: 0.9;
}

/* ===== UTILITÁRIOS ===== */
.hidden {
    display: none !important;
}

/* ===== ANIMAÇÕES ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-xl);
    color: var(--text-secondary);
}

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

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--success);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideInRight var(--transition-normal);
    max-width: 300px;
    word-wrap: break-word;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

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

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

.toast.info {
    background: var(--accent);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ===== RESPONSIVIDADE ===== */

/* Mobile - Ajustes para telas pequenas */
@media (max-width: 767px) {
    .app-main {
        padding: var(--spacing-xl) var(--spacing-md);
        padding-bottom: calc(var(--spacing-xl) + 80px);
    }
    
    .theme-controls {
        position: absolute;
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        z-index: 10;
        display: flex;
        gap: var(--spacing-xs);
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.1);
        padding: var(--spacing-xs) var(--spacing-sm);
        border-radius: var(--radius-lg);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
        transition: all var(--transition-normal);
    }
    
    .controls-logo {
        display: none;
    }
    
    .theme-selector,
    .language-selector {
        flex: 1;
        max-width: 120px;
        font-size: 0.75rem;
        padding: var(--spacing-xs);
        color: white;
        border-color: rgba(255, 255, 255, 0.3);
    }
    
    .header-content {
        padding-top: var(--spacing-md);
    }
    
    .header-content h1 {
        font-size: 2rem;
        margin-top: var(--spacing-md);
    }
    
    .header-content p {
        font-size: 1rem;
        color: white;
    }
    
    .logo-img {
        height: 48px;
    }
    
    .search-form {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .search-form input {
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .calc-form,
    .simulation-form {
        grid-template-columns: 1fr;
    }
    
    .result-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .history-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .history-actions .btn-secondary {
        width: 100%;
    }
    
    footer {
        margin-bottom: 5px;
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

@media (min-width: 768px) {
    .app-header {
        margin-top: 0;
    }
    
    .app-main {
        padding: var(--spacing-3xl) var(--spacing-xl);
        padding-bottom: calc(var(--spacing-3xl) + 80px);
    }
    
    .header-content h1 {
        font-size: 3rem;
    }
    
    .header-content p {
        font-size: 1.2rem;
        color: white;
    }
    
    .search-form {
        max-width: 600px;
        margin: 0 auto var(--spacing-xl);
    }
    
    .calc-form,
    .simulation-form {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .history-actions {
        justify-content: flex-end;
    }
    
    .bottom-nav {
        max-width: 600px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }
    
    .theme-controls {
        top: var(--spacing-2xl);
        right: var(--spacing-xl);
        left: auto;
        justify-content: flex-start;
    }
    
    .controls-logo {
        display: none;
    }
    
    .theme-selector,
    .language-selector {
        flex: none;
        max-width: none;
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    footer {
        margin-bottom: 5px;
    }
}

@media (min-width: 1024px) {
    .container {
        display: grid;
        gap: var(--spacing-xl);
    }
    
    .search-card,
    .simulation-card {
        grid-column: span 2;
    }
    
    .app-main {
        padding-bottom: calc(var(--spacing-3xl) + 80px);
    }
}

/* ===== SCROLLBAR PERSONALIZADA ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== FOCUS VISIBLE ===== */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ===== REDUÇÃO DE MOVIMENTO ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== MELHORIAS DE ACESSIBILIDADE ===== */
@media (prefers-contrast: high) {
    :root {
        --border: #000000;
        --text-secondary: #000000;
        --text-muted: #333333;
    }
}

/* ===== IMPRESSÃO ===== */
@media print {
    .theme-controls,
    .bottom-nav {
        display: none;
    }
    
    .app-header {
        background: white !important;
        color: black !important;
    }
    
    .search-card,
    .product-card,
    .simulation-card,
    .history-card,
    .faq-card,
    .sources-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}

/* ===== AVISOS E DISCLAIMERS ===== */

/* Aviso na página inicial */
.home-disclaimer {
    margin-bottom: var(--spacing-lg);
}

.disclaimer-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--warning-light), var(--warning));
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.disclaimer-badge i {
    font-size: 1rem;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* ===== SEÇÃO DE FONTES ===== */

.sources-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.sources-card h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
}

/* Alerta de disclaimer */
.disclaimer-alert {
    display: flex;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 1px solid #f59e0b;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.disclaimer-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: #f59e0b;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.disclaimer-content h3 {
    color: #92400e;
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 600;
}

.disclaimer-content p {
    color: #78350f;
    line-height: 1.6;
    margin: 0;
}

/* Conteúdo das fontes */
.sources-content {
    margin-bottom: var(--spacing-xl);
}

.sources-content h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.source-category {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--surface-hover);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary);
}

.source-category h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.source-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.source-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
    line-height: 1.6;
}

.source-list li:last-child {
    border-bottom: none;
}

.source-list strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Disclaimer legal */
.legal-disclaimer {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.legal-disclaimer h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.legal-disclaimer p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Responsividade para a seção de fontes */
@media (max-width: 768px) {
    .sources-card {
        padding: var(--spacing-lg);
    }
    
    .disclaimer-alert {
        flex-direction: column;
        text-align: center;
    }
    
    .disclaimer-icon {
        align-self: center;
    }
    
    .source-category {
        padding: var(--spacing-md);
    }
    
    .source-list li {
        font-size: 0.9rem;
    }
}