:root {
    /* --- LIGHT MODE (Padrão) --- */
    --teal: #0d9488;
    --teal-esc: #0f766e;
    --teal-cl: #f0fdfa;
    --teal-med: #5eead4;
    --verde: #10b981;
    --verde-esc: #059669;
    --verde-cl: #d1fae5;
    --vermelho: #ef4444;
    --vermelho-cl: #fef2f2;
    --slate: #475569;
    --slate-cl: #f1f5f9;
    --amber: #f59e0b;
    --amber-cl: #fffbeb;
    --texto: #0f172a;
    --suave: #475569;
    --para: #102350;
    --muted: #94a3b8;
    --borda: #e2e8f0;
    --fundo: #f8fafc;
    --cor-primaria: #0d9488;
    /* Teal */
}

/* --- DARK MODE --- */
[data-theme="dark"] {
    /* Paleta Teal para Dark Mode (Fundos mais escuros, textos mais claros) */
    --teal: #2dd4bf;
    /* Mais claro para destacar */
    --teal-esc: #ccfbf1;
    /* Texto claro */
    --teal-cl: #115e59;
    /* Fundo escuro */
    --teal-med: #0f766e;

    /* Paleta Verde */
    --verde: #34d399;
    --verde-esc: #6ee7b7;
    --verde-cl: #064e3b;

    /* Paleta Vermelho */
    --vermelho: #f87171;
    --vermelho-cl: #450a0a;

    /* Paleta Amber */
    --amber: #fbbf24;
    --amber-cl: #451a03;

    /* Paleta Slate */
    --slate: #cbd5e1;
    --slate-cl: #1e293b;
    /* Fundo de card escuro */

    /* Gerais */
    --texto: #f1f5f9;
    --suave: #cbd5e1;
    --para: #27292b;
    --muted: #64748b;
    --borda: #334155;
    --fundo: #0f172a;
    --cor-primaria: #2dd4bf;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.page-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.breadcrumb {
    font-family: 'Sora', sans-serif;
    font-size: 0.82rem;
    color: var(--muted);
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--teal);
    text-decoration: none;
    font-weight: 600;
}

.breadcrumb span {
    color: #cbd5e1;
}

.article-eyebrow {
    font-family: 'Sora', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 14px;
}

h1.article-title {
    font-family: 'Sora', sans-serif;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--texto);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

h1.article-title em {
    font-style: normal;
    color: var(--teal);
}

.article-intro {
    font-size: 1.12rem;
    color: var(--suave);
    line-height: 1.75;
    border-left: 4px solid var(--teal);
    padding-left: 20px;
    margin-bottom: 36px;
    font-style: italic;
}

.article-meta {
    font-family: 'Sora', sans-serif;
    font-size: 0.82rem;
    color: var(--muted);
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--borda);
    margin-bottom: 40px;
}

.article-meta strong {
    color: var(--suave);
}

/* CORREÇÃO: Substituí cor fixa por variável */
.article-content p {
    font-size: 1.05rem;
    color: var(--suave);
    line-height: 1.85;
    margin-bottom: 22px;
}

.article-content h2 {
    font-family: 'Sora', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--texto);
    margin: 52px 0 18px;
    padding-left: 16px;
    border-left: 5px solid var(--teal);
    letter-spacing: -0.3px;
}

.article-content h3 {
    font-family: 'Sora', sans-serif;
    font-size: 1.12rem;
    font-weight: 700;
    color: var(--texto);
    margin: 32px 0 12px;
}

.article-content strong {
    color: var(--texto);
    font-weight: 700;
}

.article-content ul {
    padding-left: 22px;
    margin-bottom: 22px;
}

/* CORREÇÃO: Substituí cor fixa por variável */
.article-content li {
    font-size: 1.02rem;
    color: var(--suave);
    line-height: 1.75;
    margin-bottom: 6px;
}

/* Boxes */
.hbox {
    border-left: 5px solid var(--teal);
    background: var(--teal-cl);
    padding: 18px 22px;
    border-radius: 0 10px 10px 0;
    margin: 28px 0;
    font-size: 1rem;
    color: #134e4a;
    /* Texto escuro para fundo claro (Light Mode) */
}

/* CORREÇÃO: Texto claro para fundo escuro no Dark Mode */
[data-theme="dark"] .hbox {
    color: #ccfbf1;
}

.hbox strong {
    color: inherit;
    display: block;
    margin-bottom: 4px;
}

.hbox.verde {
    background: var(--verde-cl);
    border-left-color: var(--verde);
    color: #065f46;
}

[data-theme="dark"] .hbox.verde {
    color: #6ee7b7;
}

.hbox.verde strong {
    color: inherit;
}

.hbox.vermelho {
    background: var(--vermelho-cl);
    border-left-color: var(--vermelho);
    color: #991b1b;
}

[data-theme="dark"] .hbox.vermelho {
    color: #fca5a5;
}

.hbox.vermelho strong {
    color: inherit;
}

.hbox.amber {
    background: var(--amber-cl);
    border-left-color: var(--amber);
    color: #78350f;
}

[data-theme="dark"] .hbox.amber {
    color: #fcd34d;
}

.hbox.amber strong {
    color: inherit;
}

/* Dual formula */
.dual-formula {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 22px 0 32px;
}

.df-card {
    border-radius: 14px;
    padding: 22px 18px;
    border: 2px solid;
    font-family: 'Sora', monospace;
}

.df-card.simples {
    background: var(--slate-cl);
    border-color: #cbd5e1;
}

.df-card.compostos {
    background: var(--teal-cl);
    border-color: var(--teal-med);
}

.df-card .dfc-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.df-card.simples .dfc-label {
    color: var(--slate);
}

.df-card.compostos .dfc-label {
    color: var(--teal);
}

.df-card .dfc-formula {
    font-size: 1.15rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 10px;
}

/* CORREÇÃO: Cor da fórmula simples deve se adaptar (era #1e293b fixo) */
.df-card.simples .dfc-formula {
    color: var(--texto);
}

.df-card.compostos .dfc-formula {
    color: var(--teal-esc);
}

.df-card .dfc-tipo {
    font-size: 0.78rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 99px;
    display: inline-block;
    margin-bottom: 8px;
}

.df-card.simples .dfc-tipo {
    background: var(--slate-cl);
    color: var(--slate);
    border: 1px solid #cbd5e1;
}

.df-card.compostos .dfc-tipo {
    background: var(--teal-cl);
    color: var(--teal);
    border: 1px solid var(--teal-med);
}

.df-card .dfc-desc {
    font-size: 0.8rem;
    color: var(--suave);
    line-height: 1.55;
}

/* Tabela evolutiva */
.evo-table {
    width: 100%;
    border-collapse: collapse;
    margin: 22px 0 30px;
    font-family: 'Sora', sans-serif;
    font-size: 0.86rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 8px rgba(0, 0, 0, .06);
}

.evo-table thead {
    background: var(--teal);
    color: #fff;
}

.evo-table th {
    padding: 13px 16px;
    text-align: left;
    font-weight: 700;
}

.evo-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--borda);
}

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

.evo-table tbody tr:hover {
    background: var(--teal-cl);
}

.evo-table .simples-val {
    color: var(--slate);
}

.evo-table .comp-val {
    color: var(--teal-esc);
    font-weight: 700;
}

.evo-table .diferenca {
    color: var(--verde-esc);
    font-weight: 800;
}

/* Onde cada um aparece */
.aplicacao-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 22px 0 30px;
}

.ap-card {
    border-radius: 14px;
    padding: 20px 18px;
    border: 1.5px solid;
    font-family: 'Sora', sans-serif;
}

.ap-card.simples {
    background: var(--slate-cl);
    border-color: #cbd5e1;
}

.ap-card.compostos {
    background: var(--teal-cl);
    border-color: var(--teal-med);
}

.ap-card .ap-titulo {
    font-size: 0.92rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.ap-card.simples .ap-titulo {
    /* CORREÇÃO: Usar variável em vez de #1e293b */
    color: var(--texto);
}

.ap-card.compostos .ap-titulo {
    color: var(--teal-esc);
}

.ap-card ul {
    padding-left: 18px;
}

.ap-card li {
    font-size: 0.82rem;
    color: var(--suave);
    line-height: 1.6;
    margin-bottom: 5px;
}

/* Exemplo card */
.exemplo-card {
    background: var(--fundo);
    border: 1px solid var(--borda);
    border-radius: 14px;
    padding: 24px;
    margin: 22px 0;
}

.exemplo-card h4 {
    font-family: 'Sora', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: var(--texto);
    margin-bottom: 16px;
}

.ex-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.ex-col {
    /* CORREÇÃO: Fundo fixo branco -> variável */
    background: var(--fundo);
    border: 1px solid var(--borda);
    border-radius: 10px;
    padding: 16px;
}

.ex-col .ec-label {
    font-family: 'Sora', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.ex-col .ec-val {
    font-family: 'Sora', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
}

.ex-col.simples .ec-val {
    color: var(--slate);
}

.ex-col.compostos .ec-val {
    color: var(--teal);
}

.ex-col .ec-calculo {
    font-family: 'Sora', monospace;
    font-size: 0.78rem;
    color: var(--muted);
    margin-top: 6px;
    line-height: 1.7;
}

.ex-winner {
    background: var(--teal-cl);
    border: 1.5px solid var(--teal-med);
    border-radius: 10px;
    padding: 14px 18px;
    margin-top: 14px;
    font-family: 'Sora', sans-serif;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--teal-esc);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ex-winner .ew-val {
    font-size: 1.2rem;
    font-weight: 800;
}

/* CTA */
.cta-box {
    background: linear-gradient(135deg, var(--teal) 0%, var(--teal-esc) 100%);
    color: white;
    padding: 44px 40px;
    border-radius: 20px;
    text-align: center;
    margin: 56px 0;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 220px;
    height: 220px;
    background: rgba(255, 255, 255, .07);
    border-radius: 50%;
}

.cta-box h3 {
    font-family: 'Sora', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.cta-box p {
    font-size: 1rem;
    opacity: .9;
    margin-bottom: 0;
    color: var(--para);
}

.cta-btn {
    display: inline-block;
    background: white;
    color: var(--para);
    padding: 14px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-family: 'Sora', sans-serif;
    font-weight: 800;
    font-size: 1.05rem;
    margin-top: 22px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
    transition: transform .2s;
}

.cta-btn:hover {
    transform: translateY(-2px);
}

/* FAQ */
.faq-section {
    margin: 56px 0;
}

.faq-section>h2 {
    font-family: 'Sora', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 28px;
    padding-left: 16px;
    border-left: 5px solid var(--teal);
    color: var(--texto);
}

details.faq-item {
    border: 1px solid var(--borda);
    border-radius: 12px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--fundo);
}

details.faq-item[open] {
    border-color: var(--teal);
}

details.faq-item summary {
    font-family: 'Sora', sans-serif;
    font-size: 0.97rem;
    font-weight: 700;
    padding: 17px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    color: var(--texto);
    user-select: none;
}

details.faq-item summary::-webkit-details-marker {
    display: none;
}

details.faq-item summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--teal);
}

details.faq-item[open] summary::after {
    content: '−';
}

/* CORREÇÃO: Texto da resposta */
.faq-answer {
    padding: 4px 20px 18px;
    font-size: 0.96rem;
    color: var(--suave);
    line-height: 1.8;
    border-top: 1px solid var(--borda);
    padding-top: 14px;
}

/* Author */
.author-box {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--fundo);
    border: 1px solid var(--borda);
    border-radius: 14px;
    padding: 22px;
    margin: 48px 0;
}

.author-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--teal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.author-info h4 {
    font-family: 'Sora', sans-serif;
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--texto);
}

.author-info p {
    font-size: 0.86rem;
    color: var(--suave);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Related */
.related-section {
    margin: 56px 0 20px;
}

.related-section h2 {
    font-family: 'Sora', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 20px;
    padding-left: 16px;
    border-left: 5px solid var(--teal);
    color: var(--texto);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.card {
    border: 1px solid var(--borda);
    border-radius: 12px;
    padding: 18px;
    /* CORREÇÃO: Fundo fixo branco -> variável */
    background: var(--fundo);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 7px;
    transition: border-color .2s, box-shadow .2s, transform .2s;
}

.card:hover {
    border-color: var(--teal);
    box-shadow: 0 6px 24px rgba(13, 148, 136, .1);
    transform: translateY(-3px);
}

.card-icon {
    font-size: 1.5rem;
}

.card-tag {
    font-family: 'Sora', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--teal);
}

.card-title {
    font-family: 'Sora', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--texto);
    line-height: 1.35;
}

.card-arrow {
    font-family: 'Sora', sans-serif;
    font-size: 0.78rem;
    color: var(--teal);
    font-weight: 700;
    margin-top: auto;
}

footer {
    background: #0f172a;
    padding: 48px 24px;
    color: #94a3b8;
    text-align: center;
    font-family: 'Sora', sans-serif;
    font-size: 0.88rem;
}

[data-theme="dark"] footer {
    background: #020617;
    border-top: 1px solid #1e293b;
}

footer a {
    color: var(--verde);
    text-decoration: none;
}



.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--fundo);
    border: 1px solid var(--borda);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    min-width: 200px;
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
}

/* .menu-item {
            position: relative;
        }

        .menu-item:hover .dropdown-menu {
            display: flex;
        } */

.dropdown-menu a {
    padding: 10px 20px;
    font-size: 0.85rem;
    color: var(--suave);
}

.dropdown-menu a:hover {
    background-color: var(--borda);
    color: var(--texto);
}

/* .toggle-theme {
    background: none;
    border: 1px solid var(--borda);
    color: var(--texto);
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 1.2rem;
    margin-left: 10px;
} */

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--texto);
    cursor: pointer;
}

@media (max-width: 600px) {
    .mobile-menu-btn {
        display: block;
    }

    .menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: var(--fundo);
        border-bottom: 1px solid var(--borda);
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .menu.active {
        display: flex;
    }

    .dual-formula {
        grid-template-columns: 1fr;
    }

    .aplicacao-grid {
        grid-template-columns: 1fr;
    }

    .ex-row {
        grid-template-columns: 1fr;
    }

    .cta-box {
        padding: 30px 22px;
    }

    .cards-grid {
        grid-template-columns: 1fr 1fr;
    }

    .author-box {
        flex-direction: column;
    }
}