/* Regla de tres: estilos específicos de página */
/* Selector de tipo de regla */
.tipo-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tipo-tab {
    flex: 1;
    min-width: 120px;
    padding: 0.65rem 0.75rem;
    border: 2px solid var(--color-border, #e5e7eb);
    border-radius: 10px;
    background: var(--color-surface, #f9fafb);
    font-size: 0.87rem;
    font-weight: 600;
    color: var(--color-text-muted, #6b7280);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.tipo-tab:hover {
    border-color: var(--color-primary, #2563eb);
    color: var(--color-primary, #2563eb);
}

.tipo-tab.active {
    border-color: var(--color-primary, #2563eb);
    background: var(--color-primary, #2563eb);
    color: #fff;
}

.tipo-tab i {
    margin-right: 0.35rem;
}

/* Visualización de la proporción */
.proporcion-visual {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.proporcion-row {
    display: grid;
    align-items: center;
    gap: 0.5rem;
}

/* Simple: 3 columnas (A / B / resultado) */
.proporcion-row.simple-row {
    grid-template-columns: 1fr auto 1fr auto 1fr;
}

@media (max-width: 420px) {
    .proporcion-row.simple-row {
        grid-template-columns: 1fr;
        row-gap: 0.35rem;
    }

    .proporcion-row.simple-row .prop-sep {
        transform: rotate(90deg);
    }
}

/* Compuesta: dinámica via JS */
.prop-sep {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-muted, #6b7280);
    text-align: center;
    padding: 0 0.2rem;
}

.prop-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--color-text-muted, #6b7280);
    text-align: center;
    margin-bottom: 0.15rem;
}

.prop-input-wrap {
    text-align: center;
}

.prop-input-wrap input {
    width: 100%;
    text-align: center;
    font-size: 1.05rem;
    font-weight: 600;
    padding: 0.6rem 0.4rem;
    border: 2px solid var(--color-border, #e5e7eb);
    border-radius: 8px;
    background: #fff;
    color: var(--color-text, #111827);
    transition: border-color 0.15s;
}

.prop-input-wrap input:focus {
    outline: none;
    border-color: var(--color-primary, #2563eb);
}

.prop-input-wrap input.incognita {
    background: var(--color-surface, #f9fafb);
    border-color: var(--color-primary, #2563eb);
    border-style: dashed;
    color: var(--color-primary, #2563eb);
    font-style: italic;
}

/* Flecha proporcionalidad */
.prop-arrow {
    font-size: 0.85rem;
    color: var(--color-text-muted, #6b7280);
    text-align: center;
}

/* Panel de relación directa/inversa para compuesta */
.relacion-select-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.relacion-select-row label {
    font-size: 0.82rem;
    color: var(--color-text-muted, #6b7280);
    min-width: 100px;
}

.relacion-select-row .input-wrapper {
    flex: 1;
}

/* Resultado */
.rt-result-hero {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0.5rem 0 1rem;
}

.rt-result-x {
    font-family: 'Montserrat', sans-serif;
    font-size: 3.8rem;
    font-weight: 700;
    color: var(--color-primary, #2563eb);
    line-height: 1;
}

.rt-result-label {
    font-size: 1rem;
    color: var(--color-text-muted, #6b7280);
    font-weight: 500;
    align-self: flex-end;
    padding-bottom: 0.4rem;
}

/* Paso a paso */
.pasos-wrap {
    margin-top: 1.25rem;
}

.pasos-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text, #111827);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.paso {
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.paso-num {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    background: var(--color-primary, #2563eb);
    color: #fff;
    border-radius: 50%;
    font-size: 0.78rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.1rem;
}

.paso-text {
    font-size: 0.9rem;
    color: var(--color-text, #111827);
    line-height: 1.55;
}

.paso-text code {
    background: var(--color-surface, #f9fafb);
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 5px;
    padding: 0.1rem 0.4rem;
    font-size: 0.88rem;
}

/* Magnitudes compuesta */
.btn-add-magnitud {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary, #2563eb);
    background: none;
    border: 2px dashed var(--color-primary, #2563eb);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    margin-top: 0.5rem;
    transition: background 0.15s;
}

.btn-add-magnitud:hover {
    background: var(--color-surface, #f9fafb);
}

.compuesta-result-row {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

@media (max-width: 420px) {
    .compuesta-result-row {
        grid-template-columns: 1fr;
    }
}

.btn-remove-mag {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 1rem;
    padding: 0 0.2rem;
    line-height: 1;
}

.compuesta-mag-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed var(--color-border, #e5e7eb);
}

.compuesta-mag-row .field-group {
    flex: 1 1 110px;
    min-width: 90px;
    margin-bottom: 0 !important;
}

.compuesta-mag-row .select-wrapper {
    min-width: 0;
}

.compuesta-mag-row .btn-remove-mag {
    flex: 0 0 auto;
    font-size: 1.2rem;
}

/* Cabecera de columnas (alineada con las filas de magnitudes) */
.magnitudes-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}

.magnitudes-header span {
    flex: 1 1 110px;
    min-width: 90px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--color-text-muted, #6b7280);
}

.magnitudes-header span:last-child {
    flex: 0 0 28px;
    min-width: 28px;
}

@media (max-width: 480px) {
    .magnitudes-header {
        display: none;
    }
}

/* Gráfico barra de proporción */
.chart-wrap svg text {
    font-family: 'Montserrat', sans-serif;
}