/* =========== 1. RESET E TOKENS =========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        :root {
            --color-primary: #1D4ED8;
            --color-primary-light: #3B82F6;
            --color-accent: #0EA5E9;

            /* Lucro/positivo */
            --color-profit: #16A34A;
            --color-profit-light: #22C55E;
            --color-profit-bg: #F0FDF4;
            --color-profit-vivid: #166534;

            /* Prejuízo/negativo */
            --color-loss: #DC2626;
            --color-loss-light: #EF4444;
            --color-loss-bg: #FEF2F2;
            --color-loss-vivid: #991B1B;

            /* Neutro/equilíbrio */
            --color-neutral: #D97706;
            --color-neutral-bg: #FFFBEB;

            /* Neutros */
            --color-bg: #F8FAFC;
            --color-surface: #FFFFFF;
            --color-border: #E2E8F0;
            --color-border-strong: #CBD5E1;
            --color-danger: #DC2626;

            --color-text: #0F172A;
            --color-text-muted: #475569;
            --color-text-light: #94A3B8;

            --shadow-sm: 0 1px 2px 0 rgba(15,23,42,0.05);
            --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.08), 0 2px 4px -2px rgba(15,23,42,0.05);
            --shadow-lg: 0 10px 25px -5px rgba(15,23,42,0.10), 0 8px 10px -6px rgba(15,23,42,0.04);

            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --container-max: 900px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html { scroll-behavior: smooth; }

        body {
            font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            font-size: 16px; line-height: 1.6;
            color: var(--color-text); background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

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

        .container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }

        /* =========== 2. HEADER =========== */
        .header {
            position: sticky; top: 0;
            background-color: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm); z-index: 50;
        }

        .header__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }

        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.25rem; font-weight: 800;
            color: var(--color-primary); letter-spacing: -0.02em;
        }

        .logo__icon {
            width: 34px; height: 34px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            border-radius: 10px; display: grid; place-items: center; color: #fff;
            font-size: 1.1rem; font-weight: 700;
        }

        .back-btn {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 8px 14px; border-radius: 999px;
            font-size: 0.875rem; font-weight: 600;
            color: var(--color-text-muted); background-color: var(--color-bg);
            transition: all var(--transition);
        }
        .back-btn:hover { background-color: var(--color-primary); color: #fff; }
        .back-btn__icon { transition: transform var(--transition); }
        .back-btn:hover .back-btn__icon { transform: translateX(-3px); }

        @media (max-width: 380px) {
            .back-btn__text { display: none; }
            .back-btn { padding: 8px 12px; }
        }

        /* =========== 3. HERO =========== */
        .hero {
            padding: 40px 0 32px; text-align: center;
            background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
            border-bottom: 1px solid var(--color-border);
        }

        .hero__breadcrumb { font-size: 0.8125rem; color: var(--color-text-muted); margin-bottom: 16px; }
        .hero__breadcrumb a { color: var(--color-text-muted); font-weight: 500; }
        .hero__breadcrumb a:hover { color: var(--color-profit); }

        .hero__badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 14px; background-color: var(--color-profit-bg);
            color: var(--color-profit); font-size: 0.8125rem; font-weight: 600;
            border-radius: 999px; margin-bottom: 16px;
        }

        .hero__title {
            font-size: clamp(1.5rem, 5vw, 2.25rem); font-weight: 800;
            line-height: 1.2; letter-spacing: -0.02em;
            margin-bottom: 12px; color: var(--color-text);
        }

        .hero__subtitle {
            font-size: 1rem; color: var(--color-text-muted);
            max-width: 560px; margin: 0 auto;
        }

        /* =========== 4. CALCULADORA =========== */
        .calc-section { padding: 32px 0; }

        .calc-card {
            background-color: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-md);
        }

        .calc-card__title { font-size: 1.125rem; font-weight: 700; margin-bottom: 4px; }

        .calc-card__hint { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 20px; }

        .form-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }

        .form-field { display: flex; flex-direction: column; gap: 6px; }

        .form-label { font-size: 0.875rem; font-weight: 600; color: var(--color-text); }

        .form-label-hint { font-weight: 400; color: var(--color-text-light); font-size: 0.8125rem; }

        .form-input {
            width: 100%; padding: 12px 14px; font-family: inherit; font-size: 1rem;
            color: var(--color-text); background-color: var(--color-surface);
            border: 1.5px solid var(--color-border-strong); border-radius: var(--radius-sm);
            transition: border-color var(--transition), box-shadow var(--transition);
            -webkit-appearance: none; appearance: none;
        }
        .form-input:focus {
            outline: none; border-color: var(--color-profit);
            box-shadow: 0 0 0 4px rgba(22,163,74,0.10);
        }

        .input-decorated { position: relative; }
        .input-decorated--prefix::before {
            content: attr(data-prefix); position: absolute; left: 14px; top: 50%;
            transform: translateY(-50%); color: var(--color-text-muted);
            font-weight: 600; font-size: 0.9375rem; pointer-events: none;
        }
        .input-decorated--prefix .form-input { padding-left: 40px; }

        .form-error { font-size: 0.8125rem; color: var(--color-danger); margin-top: 4px; display: none; }
        .form-field.has-error .form-input { border-color: var(--color-danger); }
        .form-field.has-error .form-error { display: block; }

        .submit-btn {
            width: 100%; padding: 16px 24px; margin-top: 8px;
            background: linear-gradient(135deg, var(--color-profit) 0%, var(--color-profit-light) 100%);
            color: #fff; border: none; border-radius: var(--radius-md);
            font-family: inherit; font-size: 1rem; font-weight: 700; cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex; align-items: center; justify-content: center; gap: 8px;
        }
        .submit-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 30px -5px rgba(22,163,74,0.4); }
        .submit-btn:active { transform: translateY(0); }

        /* =========== 5. RESULTADO =========== */
        .result-card {
            margin-top: 24px; background-color: var(--color-surface);
            border: 1px solid var(--color-border); border-radius: var(--radius-lg);
            padding: 24px; box-shadow: var(--shadow-md);
            display: none; animation: fadeInUp 0.4s ease-out;
        }
        .result-card.is-visible { display: block; }

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

        .result-card__header {
            padding-bottom: 16px; margin-bottom: 20px;
            border-bottom: 1px solid var(--color-border);
        }

        .result-card__kicker {
            display: inline-block; font-size: 0.75rem; font-weight: 700;
            text-transform: uppercase; letter-spacing: 0.08em;
            padding: 4px 10px; border-radius: 999px; margin-bottom: 8px;
        }

        .result-card__title { font-size: 1.25rem; font-weight: 800; }

        /* Gauge / medidor visual da margem */
        .gauge-wrapper {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 24px 0 16px;
            margin-bottom: 20px;
        }

        .gauge {
            position: relative;
            width: 200px;
            height: 110px;
            overflow: hidden;
        }

        .gauge__bg {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            border: 18px solid var(--color-bg);
            border-bottom-color: transparent;
            border-left-color: transparent;
            transform: rotate(225deg);
            position: absolute;
            top: 0; left: 0;
        }

        .gauge__fill {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            border: 18px solid transparent;
            border-top-color: var(--color-profit);
            border-right-color: var(--color-profit);
            border-bottom-color: transparent;
            border-left-color: transparent;
            transform: rotate(225deg);
            position: absolute;
            top: 0; left: 0;
            clip-path: inset(0 0 0 0);
            transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        .gauge__center {
            position: absolute;
            bottom: 0; left: 50%;
            transform: translateX(-50%);
            text-align: center;
        }

        .gauge__value {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .gauge__label {
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-top: 4px;
        }

        /* Cards de métricas (3 colunas) */
        .metrics-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 10px;
            margin-bottom: 20px;
        }

        .metric-card {
            padding: 18px;
            border-radius: var(--radius-md);
            text-align: center;
            transition: background-color 0.3s;
        }

        .metric-card__label {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 6px;
        }

        .metric-card__value {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .metric-card__sub {
            font-size: 0.8125rem;
            margin-top: 4px;
            opacity: 0.7;
        }

        .metric-card--lucro {
            background-color: var(--color-profit-bg);
            color: var(--color-profit-vivid);
        }

        .metric-card--margem {
            background-color: var(--color-profit-bg);
            color: var(--color-profit-vivid);
        }

        .metric-card--markup {
            background-color: #EFF6FF;
            color: #1E3A8A;
        }

        .metric-card--prejuizo {
            background-color: var(--color-loss-bg);
            color: var(--color-loss-vivid);
        }

        /* Barra visual custo vs lucro */
        .composition-bar {
            margin-bottom: 20px;
        }

        .composition-bar__label {
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }

        .composition-bar__track {
            height: 20px;
            border-radius: 999px;
            overflow: hidden;
            display: flex;
            background-color: var(--color-bg);
        }

        .composition-bar__segment {
            height: 100%;
            transition: width 0.6s cubic-bezier(0.25, 1, 0.5, 1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.6875rem;
            font-weight: 700;
            color: #fff;
            overflow: hidden;
            white-space: nowrap;
        }

        .composition-bar__segment--cost {
            background: linear-gradient(90deg, #475569 0%, #64748B 100%);
        }

        .composition-bar__segment--profit {
            background: linear-gradient(90deg, var(--color-profit) 0%, var(--color-profit-light) 100%);
        }

        .composition-bar__segment--loss {
            background: linear-gradient(90deg, var(--color-loss) 0%, var(--color-loss-light) 100%);
        }

        .composition-bar__legends {
            display: flex;
            gap: 16px;
            margin-top: 8px;
            flex-wrap: wrap;
        }

        .composition-bar__legend {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-text-muted);
        }

        .composition-bar__dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* Alerta de prejuízo */
        .alert-box {
            padding: 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9375rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 16px;
            display: none;
        }

        .alert-box.is-visible { display: flex; align-items: flex-start; gap: 10px; }

        .alert-box--loss {
            background-color: var(--color-loss-bg);
            color: var(--color-loss-vivid);
            border-left: 4px solid var(--color-loss);
        }

        .alert-box--profit {
            background-color: var(--color-profit-bg);
            color: var(--color-profit-vivid);
            border-left: 4px solid var(--color-profit);
        }

        .alert-box--warn {
            background-color: var(--color-neutral-bg);
            color: #92400E;
            border-left: 4px solid var(--color-neutral);
        }

        /* Disclaimer */
        .result-disclaimer {
            padding: 14px 16px;
            background-color: #FEF3C7;
            border-left: 4px solid #F59E0B;
            border-radius: var(--radius-sm);
            color: #92400E;
            font-size: 0.875rem;
            font-style: italic;
            line-height: 1.5;
        }

        /* =========== 6. ARTIGO SEO =========== */
        .article { padding: 40px 0 60px; }

        .article__wrapper {
            background-color: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-lg); padding: 28px 24px;
        }

        .article h2 {
            font-size: 1.375rem; font-weight: 800; color: var(--color-text);
            margin-top: 32px; margin-bottom: 12px; letter-spacing: -0.01em; line-height: 1.25;
        }
        .article h2:first-child { margin-top: 0; }

        .article h3 { font-size: 1.0625rem; font-weight: 700; color: var(--color-text); margin-top: 20px; margin-bottom: 8px; }

        .article p { color: var(--color-text-muted); margin-bottom: 14px; line-height: 1.75; }

        .article ul { margin: 0 0 16px 0; padding-left: 22px; color: var(--color-text-muted); }

        .article li { margin-bottom: 8px; line-height: 1.65; }

        .article strong { color: var(--color-text); font-weight: 600; }

        .article .highlight-box {
            background-color: var(--color-profit-bg); border-left: 4px solid var(--color-profit);
            padding: 16px 18px; border-radius: var(--radius-sm); margin: 16px 0;
        }

        .article .highlight-box--blue {
            background-color: #EFF6FF; border-left-color: var(--color-primary);
        }

        .article .highlight-box--red {
            background-color: var(--color-loss-bg); border-left-color: var(--color-loss);
        }

        .article .highlight-box p { margin-bottom: 0; color: var(--color-text); }

        .article .table-wrapper {
            overflow-x: auto; margin: 16px 0; border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
        }

        .article table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; min-width: 460px; }

        .article thead { background-color: var(--color-profit); color: #fff; }

        .article th { padding: 12px 16px; font-weight: 700; text-align: left; }

        .article td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); }

        .article tbody tr:last-child td { border-bottom: none; }

        .article tbody tr:nth-child(even) { background-color: var(--color-bg); }

        /* =========== 7. FOOTER =========== */
        .footer {
            background-color: #0F172A; color: #94A3B8;
            padding: 28px 0; text-align: center; font-size: 0.875rem;
        }
        .footer strong { color: #FFFFFF; font-weight: 600; }

        /* =========== 8. UTILS =========== */
        .sr-only {
            position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
            overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
        }

        :focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
            html { scroll-behavior: auto; }
        }

        /* =========== 9. BREAKPOINTS =========== */
        @media (min-width: 640px) {
            .container { padding: 0 32px; }
            .hero { padding: 56px 0 48px; }
            .calc-card, .result-card, .article__wrapper { padding: 32px; }
            .form-grid--2col { grid-template-columns: 1fr 1fr; }
            .metrics-grid { grid-template-columns: 1fr 1fr 1fr; }
        }

        @media (min-width: 900px) {
            .hero__title { line-height: 1.15; }
        }