/* Core variables & resets */
:root {
    --bg-main: #f4f6f9;
    --bg-card: #ffffff;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --text-main: #1f2937;
    --text-sub: #6b7280;
    --border: #e5e7eb;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
}

/* Layout Dashboard */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background-color: #111827;
    color: white;
    padding: 30px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.logo span {
    color: var(--primary);
}

nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* DESIGN DAS ABAS DE NAVEGAÇÃO */
.tab-btn {
    background: none;
    border: none;
    color: #9ca3af;
    padding: 14px 20px;
    text-align: left;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.tab-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

.tab-btn:focus {
    outline: 3px solid rgba(79,70,229,0.18);
}

.tab-btn.active {
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Área de Conteúdo */
.main-content {
    flex: 1;
    padding: 40px;
}

/* Seção de Destaque - Hero */
.hero-section {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 40px;
    border-radius: 12px;
    margin-bottom: 35px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.hero-section h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.hero-section p {
    color: #94a3b8;
    font-size: 1.1rem;
    margin-bottom: 20px;
    max-width: 700px;
}

/* BOTÃO DE DESTAQUE PRINCIPAL (SIMULE AQUI) */
.btn-hero {
    background-color: var(--success);
    color: white;
    border: none;
    padding: 14px 28px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
    transition: all 0.2s ease;
}

.btn-hero:hover {
    background-color: var(--success-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-hero:focus {
    outline: 3px solid rgba(16,185,129,0.15);
}

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

.content-grid {
    display: grid;
    grid-template-columns: 64px 1fr 1.2fr; /* side tabs column + form + results */
    gap: 20px;
    align-items: start;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.card h3 {
    margin-bottom: 20px;
    font-size: 1.3rem;
    border-bottom: 2px solid var(--bg-main);
    padding-bottom: 10px;
}

/* Inputs e Seletores */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.input-group label {
    font-weight: 600;
    font-size: 0.9rem;
}

.input-group input, .input-group select {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
    background-color: #fff;
    transition: border-color 0.2s;
}

.input-group input:focus, .input-group select:focus {
    border-color: var(--primary);
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    margin-bottom: 12px;
}

/* DESIGN DO BOTÃO DE CALCULAR INTERNO */
.btn-calc {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 14px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
    transition: all 0.2s ease;
    margin-top: 10px;
}

.btn-calc:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}

.btn-calc:focus {
    outline: 3px solid rgba(79,70,229,0.12);
}

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

/* Abas */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Resultados e Tabelas */
.placeholder {
    color: var(--text-sub);
    text-align: center;
    padding: 40px 0;
}

.hidden {
    display: none !important;
}

.tabela-calculo {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.tabela-calculo th, .tabela-calculo td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.provento {
    color: var(--success);
    font-weight: 600;
    text-align: right;
}

.desconto {
    color: var(--danger);
    font-weight: 600;
    text-align: right;
}

.resultado-final {
    background: var(--bg-main);
    padding: 20px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.resultado-final strong {
    color: var(--primary);
    font-size: 1.5rem;
}

.chart-container {
    max-width: 300px;
    margin: 0 auto;
}

/* Info/content reusable classes (moved from inline) */
.info-section, .privacy-content {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    font-family: sans-serif;
    color: #333;
    line-height: 1.6;
    background: transparent;
}

.info-section h2, .privacy-content h1, .privacy-content h2 {
    color: var(--primary);
}

.adsense-block { /* keep simple here; examples may still use inline overrides */
    text-align: center;
    margin: 20px auto;
    min-height: 90px;
    background: #f9f9f9;
    border: 1px dashed #ccc;
}

.adsense-block.large {
    min-height: 250px;
    margin: 25px 0;
}

/* Vertical side tabs */
.side-tabs-vertical {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  justify-content: flex-start;
  position: sticky;
  top: 80px; /* reduced top for better alignment */
  z-index: 40;
  padding: 6px;
  background: transparent;
  border-radius: 8px;
}

.side-tabs-vertical .tab-btn {
  width: 110px;
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  border-radius: 10px;
  background: #fff;
  color: var(--text-main);
  border: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(16,24,40,0.04);
}

.side-tabs-vertical .tab-btn .tab-icon { font-size: 1.2rem; }
.side-tabs-vertical .tab-btn .tab-label { font-weight: 600; }

.side-tabs-vertical .tab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: none;
}

@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr; /* stack columns on mobile */
  }
  .side-tabs-vertical {
    position: static;
    flex-direction: row;
    justify-content: center;
    gap: 8px;
    order: -1; /* move above formulary */
    margin-bottom: 12px;
    background: transparent;
    padding: 0;
  }
  .side-tabs-vertical .tab-btn {
    width: auto;
    height: auto;
    padding: 8px 10px;
    border-radius: 8px;
  }
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    color: var(--text-sub);
}

.site-footer a {
    color: var(--primary);
    text-decoration: none;
}

.site-footer a:hover, .site-footer a:focus {
    text-decoration: underline;
}

/* Accessibility: visible focus */
:focus {
    outline: none;
}

:focus-visible {
    outline: 3px solid rgba(79,70,229,0.14);
    outline-offset: 2px;
}

/* Responsividade */
@media (max-width: 1024px) {
    .dashboard {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        padding: 20px;
    }
    .logo {
        margin-bottom: 20px;
        text-align: center;
    }
    nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    .tab-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
        width: auto;
    }
    .main-content {
        padding: 20px;
    }
    .content-grid {
        grid-template-columns: 1fr;
    }
    .hero-section h1 {
        font-size: 1.8rem;
    }
}